which turbo for a b18c2?

Hey guys

im in the planing process of turbocharging my dc2 integra (b18c2), and have no clue on which turbo 2 chose as i dont no any ppl personaly that have turbocharged a integra. my goal is to have a good quartermile time , and not exactly try and be king of the dyno.

ill b running stock internals so max boost will be 10psi. currently looking into the t28bb of the jap spec s15. What do you guys think of the t28 ,, or is it better to go for a t3? keeping in mind i dont want to be waiting for boost to kik in for 10 years.

thanx for the help guys
Nemz

i dont know much about this stuff, but i see a few honda turbo inc a guy i know that use the t28, thats the most common one i know of and some with t3, but i havent heard many use them as much as i have heard t28 being used.

Get something bigger. A nice GT30 =)

depends, want, power wise, and how linear you want the power as well.
also driveability as well.

i had a t3/4 hybrid attached to my B18c..
full boost be 4500rpm to 8000rpm
t28 would be good but u will be limited top end and power wise..
Lag hurts but if its tuned poperly (my wasnt) will kik ass

either t28bb, great turbo, enough to pull up to 200kw.
or a gt28rs, better turbo, very good repsonse with up to 250kw
figures are atw

well im limited to the fact that i cant boost over 10psi, so i guess i want a turbo that will be in its most efficient point of that presure range. not much use in getting a massive turbo if its not gonna be boosted high?

im a bit confused here.... say i get a t28bb, at 10psi how much power will i get compared to a bigger turbo at same amount of psi. will the engine still be able to handel more kw's even tho its still at 10psi?

i used a GT2871 on my first setup on the stock internaled engine.....it had full boost at around 3500rpm and held strong with no boost spike.
if i had my time over again on the first setup i would most probably look into getting a GT3071r with a .86AR exhaust housing......i think these turbos would be well suited to the b18c and would make a shiet load of power on a low boost level.

james

If the goal is drag racing a gt30 or gt35r would be best and then just set up a two step. It will boost somewhere from 5000 - 6000rpm but it wont matter because the engine won't drop off boost. DL001 has a gt3037 on his stock b18c dcr2 that just got tuned by Dave today and made 204kw at 8.5 lbs. Kick ass setup.

You're asking a question without giving enough information.

Draw a picture of what you'd like your power curve to look like then the answers will come. No one knows how you drive your car other than you.

For example, I don't like to wring the neck of my motor every time I come out of a corner so I like to stay lower rpm in 3rd as opposed to high second. A larger turbo would be useless to me, so I opted for a smaller one in sacrifice of peak power.

If however you just like to go fast in a straight line, the bigger the better.

true..

however working out the size of the motor with the right turbo application is crucial considering the high compression of a b18c.

IMHO i think its best you consider internals as you are going to realise that boost will in the end cause wear and tear on a high compression vtec motor.

If its just a turbo your interested in i would recommend a GT28R turbo.

its a nice size for the application it spools up quite quick (mine spooled up full boost at 3200rpm and pulled to 6500 in my b18b2)

GT28R is better for street application and might not pull big numbers on the dyno as opposed to a T3/T4 turbo (due to the smaller sizging) but it will be a difference when it comes to tracking or dragging the car as boost is near instantaneous.

I believe a GT28R kicks off the fact that the bigger the better cause its a decent size seeing your only pushing it 10PSI (make sure you get a electronic boost controller as the bleep tap ones will spike) and it pulls you to close to redline.

MRJDM on these forums as well as chi at GPC have seen my teg turbo and the size and the application were right up there.

consider at least hi flowing your injectors (around $40 a injector) where they drill into your standard ones to make way for more fuel.

and make sure you change your oil to something more light duel to the turbo needing its bit in it as well.

Sparkies are a must and coolant as well.

if you need any other info or got questions feel free to ask

ok guys i have decided to go with the t28 tubo of a s15. as my mate is upgrading his s15turbo so i will get the t28 for cheap... i was just thinking about a decompression plate? any 1 know much about them? would i get more power with 10psi on high comp compared to 14psi on low comp?? and what kind of power figures should i be expecting with the t28 on 10psi?

thanx
Nemz

150kw

Quote:

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Originally Posted by TEGZOTIC

ok guys i have decided to go with the t28 tubo of a s15. as my mate is upgrading his s15turbo so i will get the t28 for cheap... i was just thinking about a decompression plate? any 1 know much about them? would i get more power with 10psi on high comp compared to 14psi on low comp?? and what kind of power figures should i be expecting with the t28 on 10psi?

thanx
Nemz

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I would not touch compression.


No Decompression Gasket:

Good combustion
More responsive
Good fuel economy
Less boost : low heat

Yes Decompression Gasket:

Bad combustion
Less responsive
Bad fuel economy
More boost : More heat

But as always it comes down to your setup, install and tune. If anything is crap you be the 1st one to find out.

I have only heard good things about the gt3071r, rated at 500hp with .63 housing, should not have much lag at all.

thats the preferred turbo for sr20s these days

dude get the ball bearing t28r, trust me you wouldnt want to get a non ball bearing turbo you will regreat it turbo lag sucks. dont forget you have to do your injectors and get a tune.

get the big boy
GT35R!

Did you end up with the s15 turbo?

planz changed and never got around 2 turboing the dc2...
now driving a 180sx with a gt2871r 0.86..
i definatly wouldnt recomend a massive turbo on a honda tho. its useless. you will have huge turbo lag, and unless your boosting to 17psi min your not in the efficiency range. and i doubt many ppl will be doing that here as your all high comp.

wtf funny guy

wtf?
1. run a biggert turbo to get a bit later boost = more traction on fwd
2. Honda motors like to flow much better than the sr20 etc etc so no matter what the turbo will come on boost earlier
3. More cp = less boost to reach a similar if not more power goal = less heat
bla bla bla.

for a stock b18c id look at a gt2871r built internals something up around a gt30 maybe 35 on the smaller side of the 35's. then there are other turbos too not just garrett.

On a b18c i wouldn't got smaller than a T28RS a T28R you will regret cos you'll max it out.

Quote:

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Originally Posted by TEGZOTIC

planz changed and never got around 2 turboing the dc2...
now driving a 180sx with a gt2871r 0.86..
i definatly wouldnt recomend a massive turbo on a honda tho. its useless. you will have huge turbo lag, and unless your boosting to 17psi min your not in the efficiency range. and i doubt many ppl will be doing that here as your all high comp.

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I know this turbo. Its stupid. it boosts so late on an SR and doesnt even make the power to back it up. Friend had the same setup. I guess its the whole fact its T28 based. All the nissan guys are scared of the T3 framed turbos. Just for your information, switch to a GT30R and u will gain middrange, and massive topend!

the 2871R was designed for twin applications. Large bores.

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Originally Posted by Weq

I know this turbo. Its stupid. it boosts so late on an SR and doesnt even make the power to back it up. Friend had the same setup. I guess its the whole fact its T28 based. All the nissan guys are scared of the T3 framed turbos. Just for your information, switch to a GT30R and u will gain middrange, and massive topend!

the 2871R was designed for twin applications. Large bores.

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yeah your right the .86 has way 2 much turbo lag if your not planing on running more than 20psi. the gt30 .64 is a better option but reason i didnt chose that is because i would have top go high mount of the 180, which would get me defected in 5seconds,lol but im pritty happy with the 2871,, but should have chose a lower rear aR.

vote for GT30R

Quote:

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Originally Posted by TEGZOTIC

yeah your right the .86 has way 2 much turbo lag if your not planing on running more than 20psi. the gt30 .64 is a better option but reason i didnt chose that is because i would have top go high mount of the 180, which would get me defected in 5seconds,lol but im pritty happy with the 2871,, but should have chose a lower rear aR.

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Yeh did u get the t04e 4" compressor cover too? We were running 20psi on my friends, making around 250kw. I used to like driving it, it wasnt all that bad above 5000rpm. Was run to drive. It just had nothing below, and no partial throttle boost. gaahhh. I mad the mistake too. i used a T3 based GT2871R on my civic, .64A/R. Same problem, no partial throttle boost and the power it made just didnt justify the lag.

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Originally Posted by Weq

Yeh did u get the t04e 4" compressor cover too? We were running 20psi on my friends, making around 250kw. I used to like driving it, it wasnt all that bad above 5000rpm. Was run to drive. It just had nothing below, and no partial throttle boost. gaahhh. I mad the mistake too. i used a T3 based GT2871R on my civic, .64A/R. Same problem, no partial throttle boost and the power it made just didnt justify the lag.

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nah i got the 3" comp cover.. boosts at around 4krpm,, anything below that and its basicaly on zero,lol so yer a fair bit of lag,, i know ppl spooling up at the same rpm with gt30's..
but im quiet happy with the power its making. hondas should boost a bit faster as there high compression engines. but its not like you can run a lot of boost on high comp..
thats y i say big turbos are useless unless your going to be boosting in there efficency range which is usualy 17psi+.

Quote:

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Originally Posted by TEGZOTIC

nah i got the 3" comp cover.. boosts at around 4krpm,, anything below that and its basicaly on zero,lol so yer a fair bit of lag,, i know ppl spooling up at the same rpm with gt30's..
but im quiet happy with the power its making. hondas should boost a bit faster as there high compression engines. but its not like you can run a lot of boost on high comp..
thats y i say big turbos are useless unless your going to be boosting in there efficency range which is usualy 17psi+.

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Its a good point, but remmber that compression and VE of a motor has an impact on compressor efficeny of the turbo ;)

Quote:

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Originally Posted by Weq

Its a good point, but remmber that compression and VE of a motor has an impact on compressor efficeny of the turbo ;)

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It might change the operating points but it doesn't change any characteristics of the compressor.

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Originally Posted by string

It might change the operating points but it doesn't change any characteristics of the compressor.

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Yes true. My bad. I guess i was trying to express that each engine will repond differently to a turbo. And depending on the flow map, the air comming out of a GT35 at 10psi may surpass the efficency/cfm of a GT28 at 18psi. So even though its not in its peak efficeny band, it still more efficent at lower boost then a smaller turbo at higher boost.

Quote:

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Originally Posted by TEGZOTIC

Hey guys

im in the planing process of turbocharging my dc2 integra (b18c2), and have no clue on which turbo 2 chose as i dont no any ppl personaly that have turbocharged a integra. my goal is to have a good quartermile time , and not exactly try and be king of the dyno.

ill b running stock internals so max boost will be 10psi. currently looking into the t28bb of the jap spec s15. What do you guys think of the t28 ,, or is it better to go for a t3? keeping in mind i dont want to be waiting for boost to kik in for 10 years.

thanx for the help guys
Nemz

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i reckon u should just go for a disco potato turbo, they are good for response and u won't get any lag, they are basically a t28 high flowed.

Quote:

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Originally Posted by TEGZOTIC

planz changed and never got around 2 turboing the dc2...
now driving a 180sx with a gt2871r 0.86..
i definatly wouldnt recomend a massive turbo on a honda tho. its useless. you will have huge turbo lag, and unless your boosting to 17psi min your not in the efficiency range. and i doubt many ppl will be doing that here as your all high comp.

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your car lags cos sr20's run low compression

running a big turbo on Hondas you will get less lag cos its a high compression engine....

off boost, there is virtually no lag

yeah thats true but i can run a lot more boost then a honda can because of the compression. unless you can afford c16 fuel or something so it doesnt detonate;)

and yes once your ofboost you are LAGING , thats what lagging is... sr20's arnt that bad of boost,,, they just seam slow ass when you compare when boosting..
personaly i dont care about lag so much anymore,, iv totaly changed my setup now.. forged pistons, gtk550 turbo, ect ect, aiming for an easy 300rwkw's ,,, so lag is a must but dont realy care as im buiding it for drag\street purposes.

Quote:

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Originally Posted by Bludger

your car lags cos sr20's run low compression

running a big turbo on Hondas you will get less lag cos its a high compression engine....

off boost, there is virtually no lag

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don't forget to factor that an SR20 is a 2ltr engine and a b18 is only a 1.8 Ltr.

It makes abit of a difference again, just comparing my b16 to another b18

Quote:

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Originally Posted by TEGZOTIC

and yes once your ofboost you are LAGING , thats what lagging is... sr20's arnt that bad of boost,,, they just seam slow ass when you compare when boosting..
personaly i dont care about lag so much anymore,, iv totaly changed my setup now.. forged pistons, gtk550 turbo, ect ect, aiming for an easy 300rwkw's ,,, so lag is a must but dont realy care as im buiding it for drag\street purposes.

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You are confusing LAG with BOOST THRESHOLD. Lag is the TIME it takes for you to build boost once you plant the throttle. Boost threshold is the engine RPM at which you build boost.

Sadly 99% of the world doesn't know the difference.

Quote:

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Originally Posted by string

You are confusing LAG with BOOST THRESHOLD. Lag is the TIME it takes for you to build boost once you plant the throttle. Boost threshold is the engine RPM at which you build boost.

Sadly 99% of the world doesn't know the difference.

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This turbo provides both in ample quantities.

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Originally Posted by Weq

This turbo provides both in ample quantities.

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Doesn't matter when you drive a nissan, it's all about the number on the dyno sheet.

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Originally Posted by string

Doesn't matter when you drive a nissan, it's all about the number on the dyno sheet.

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And the carbon on the rear bumper.

Quote:

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Originally Posted by string

Doesn't matter when you drive a nissan, it's all about the number on the dyno sheet.

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=DYNO QUEEN... its not just about peak power!

What a bunch of haters.

You can't say most people slapping turbos onto their N/A Hondas aren't chasing numbers.

Oh wait my bad....it's to go faster.....when you have traction.....in a straight line.......after it's been "tuned" of course. =\

Torque steer = hektic bro?

turbo nissans are for poofs.

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Originally Posted by Weq

turbo nissans are for poofs.

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I second this (don't you have a Nissan with a pair of snails bolted on?)

they're on a power trip and think they can pick on us lil guys

lol, so do you assume the title of gay lord then? :p

I own s15 and turbo honda :)

So does that mean i want to kill myself when i wake up in the morning

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turbo nissans are for poofs.

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why do honda owners hate on nissans so much? lol whats so wrong with them.

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Originally Posted by iwantvtec

why do honda owners hate on nissans so much? lol whats so wrong with them.

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they don't it's the other way round, 2nd hand Honda's cost more to buy, cost more to modify, make less power, but are still the better car. I would too if I was them.

oh and............IMO, lol

i believe in melb, Nissans have heaps of respect for hondas, considering all my mates drive, r32,s 300's, 180's and silvias. Because Honda's ability isn't the "best" on a straight line but on the track, Honda> nissans. just my 2 c.

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Originally Posted by Bludger

I second this (don't you have a Nissan with a pair of snails bolted on?)

they're on a power trip and think they can pick on us lil guys

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lol. yes, you are alert. obviously what i said, was said in jest. just pointing out to 'nigs' that i give honest advice, de-void of brand whoring bias.

I respect any car modified by the owners hand. And thats all i care about when reading forums. DIY people looking for a advice.

Quote:

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Originally Posted by Weq

lol. yes, you are alert. obviously what i said, was said in jest. just pointing out to 'nigs' that i give honest advice, de-void of brand whoring bias.

I respect any car modified by the owners hand. And thats all i care about when reading forums. DIY people looking for a advice.

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i'll come to you when i need some then.....

Quote:

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Originally Posted by Weq

turbo nissans are for poofs.

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lolololol says the guy with 2 turbos on his nissan lolol

hi guys sorry to jack the thread,

im about to purchase a turbo but im undecided between the two. Im wanting b/w 330-350hp no more! its for my eg which is going to undergo a build for the circuit and road racing. Instant response is required say 3000-3500 10psi at this rpm to 15psi at 8500rpm. Im currently stuck between a ATP modified gt28rs .82 T3 housed 4 bolt turbo (will flow more as t3 based) and a gt2871, will the atp version of the 28 get me to 350hp without dying off by our dyno standards here? (basically trying to make it as close as possible to a na setup but linear to 350hp)

what u guys think? or go the t2871 400hp version t3?

http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

330-350HP at the wheels? or at the motor? I have the gt28rs on 7psi currently pushing 240hp atw's in my b16a2.

if i pushed it to 10-15psi i could deff be reaching the 330-350hp atw's mark. I love the gt28rs to be honest. spool time is very short. Not that much lag. I find it nice to be running in 5th on the freeway and to put the foot down and have power their to play with. With other turbo's ive had, ive needed to drop back to 4th to feel any significate power. But the gt28rs does slightly die out after 6 thou. But the Vtec is their for the rest :)

atw just want a nice linear graph with lots of area under the graph...

keep in mind these gt28rs are t3 .82 so bigger than the t25 flannged variant. motor will be running wiseco pistons prolly around the 10cr mark, skunk 2 im or victor x, 38mm tial gate, 2.5in cooler piping, valves springs retainers undecided on the manifold as yet but eithr ss log, mini ram or ramhorn (want to try run a full size radiator as will be for circuit if i can)

Dont get the 2871R. Either stick with a .82 28RS or go upt to a .64 GT30. For road race though, i would choose a 28RS.

Oh and those HP estimates are all flywheel. Dont U wont get anywhere that at the wheels. For upto around 220kW, get an RS. for over 220kW, get a GT30.

hmmm shit, whats the spool like on the gt30 .64 i need good throttle response but also hold its own up top to 8.5k rpm need a power band of around 3-3.5 k to 8-9k rpm with nice linearish graph suited to a monster of a road/circuit car

If you going to use it on the track, why do you do you want low end response? You be above 5k rpm all the time.

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Originally Posted by DLO01

If you going to use it on the track, why do you do you want low end response? You be above 5k rpm all the time.

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low speed, 2nd gear corners...

No turbo will be the best at both worlds. U need comphremise.. With the way FWD wheelspins, i would recommend and RS with a .82 and T3 housing for your needs.

basically im trying to replicate a na setup as much as possible with the power delivery but have 330-350hp on tap.

Manifold is a min-ram with 44mm tial gate 3in dump which is coming in 4 or so weeks.

Quote:

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Originally Posted by EGB18CT

basically im trying to replicate a na setup as much as possible with the power delivery but have 330-350hp on tap.

Manifold is a min-ram with 44mm tial gate 3in dump which is coming in 4 or so weeks.

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If you wanna replicate an NA power feel then just get a High end supercharged setup. i don't know if it will get you to 330-350hp but it will be close with alot of mods.

Turbo FWD as Weq Said you cant get best of both worlds and if your running track you will be above 5000rpm anyways so i would say go with the bigger turbo but my personal preference i think the .82 28rs setup.

Also i went from Ram horn tial 38mm to mini-ram 44mm HKS and the mini-ram with the 44mm HKS was much better low power and it didnt decrease the top end that much either. Just felt alot nicer in the lower rpms.

Yes, its a compromise. I would go a larger turbo and sacrafice low end. I don't think it will be too bad.

decisions decisions i think ill start with a gt28rs t3 .82 atp turbo then work up see how she performs, car will be light and the sussy setup will be up to scratch. thanks guys

u will be happy with the setup... the 44mm is a great choice, gives u lots of flow around the turbine to increase power output. i think withthe mini ram, u will get close to ur goal..

is this a type-r style, big cam?

what u mean by type r style big cam?

ill prolly go wisco pistons and carillo rods if i can afford them prolly 81.5mm 9.5cr or 10.5cr but thinking 9.5 atm

cam will be stock gsr or type r for now with supertech valve train, type r oil pump, possibly dart or ge sleeves and honda oem bearings and gaskets victor x intake and call it a day pretty much.

My advice, keep the compression in the 9's. Ive built 8.5 and 9.5 and the difference is marginal at best. But u get more of a buffer when it comes to shitty fuel. And tuners love to blame holes in pistons on shitty fuel.

thanks weq well the aim of this build is for a excellent circuit car (will have a nice cage ive got planned for it) traction bars are coming, ive got the coilovers and lcas alredy, just need an asr brace and sway some new energy bushings, innovate billet solid alumin. mounts are coming too, benen tri bar and hooks bla bla, just need the motor to be very efficient to get to my 330-350hp goal with the .82 rs and keep it reliable and the heat down. hopefully its works out well but ive been planing this shit for yonks.