B20b vtec conversion

[stevesss]

Hello there, im new here and have just purchased a Civic. I have been hearing alot about the b20b vtec conversion and wanted to know if this conversion is firstly worth the time and money to do vs going out and buying a ready b18c vtec.

thank you heaps

[stndrd]

Search and you will find mate

http://www.ozhonda.com/forum/showthread.php?125942-The-B20VTEC-discussion-thread

[ALLMTR996]

There are alot on this forum that claim and write alot,99% of it is just plain B/S when it comes to a B20Vtec engine,when Toda or Tinkerbell write something take note its very good info.

[IV73CI]

ive converted from B16 to a B20VTEC and i must say the torque and power is tremendous.

as soon as you put your foot down she picks up the RPM very very quick and looses traction from 1st-3rd gear on 17inch wheels street tyres lol.

im working on my sussy setup now and might take her to the tracks ... but will need more cooling parts like - oil cooler, full length radiator and better brake setup - SS braided brake lines, bigger calipers or spoon calipers/rotors to suit.

i would say - do it if you have the budget - ive driven B18C and turboed B16's ...still nothing compared to an all motor built B20VTEC FTW!

[manonastick]

ive converted from B16 to a B20VTEC and i must say the torque and power is tremendous.

as soon as you put your foot down she picks up the RPM very very quick and looses traction from 1st-3rd gear on 17inch wheels street tyres lol.

im working on my sussy setup now and might take her to the tracks ... but will need more cooling parts like - oil cooler, full length radiator and better brake setup - SS braided brake lines, bigger calipers or spoon calipers/rotors to suit.

i would say - do it if you have the budget - ive driven B18C and turboed B16's ...still nothing compared to an all motor built B20VTEC FTW!

How is it for a daily though? is the low end torque any good?

[Vvvtec]

The low end torque would be one of the best things about a B20vtec

[blabla]

Would love to have one built for my car. Sick of no down low from my b16 :( but everything comes with a hefty tag

[IV73CI]

How is it for a daily though? is the low end torque any good?

Yeh its awesomeness lol.. My s300 is tuned with a nice hefty vtec curves all across the ranges... Low or high end put ur foot down the rpm/speedo climbs up without any struggles.


The low end torque would be one of the best things about a B20vtec

Wurrdd.. Helps aswell with a good tuner and im running on E85 fuel too..


Would love to have one built for my car. Sick of no down low from my b16 :( but everything comes with a hefty tag

Originally was going down the forced induction path.. But since i alredy have a turboed fozzy xti (225awkw) there was no point in having another turbo car.. Not worth the fuel costs nowadays.

Thas right nice hefty empty pockets with a hole through it.. After u sum up all te costs involved.

But at the end.. 146fwkw on normal tune and has plenty of potential for my v2 final tune. Hoping at least 155+kw ..

[stevesss]

Thank you for all your responses. I shouldve maybe clarified from the start that i will be needing the car to last, i will be doing over 40000 kilometres per year and the last thing i want is unecesary fixes that i will have to do. Either i build a b20b vtec or get a b18c, either way you look at it, i want something to last

Regards

[Vvvtec]

Aslong as its built and tuned properly, the B20 can go the distance I guess. Obviously it comes down to how you drive it aswell :)

[TODA AU]

Or buy a built one with a 2 or 3 year warranty

[exquisit]

wot u got done to ur b20 to get that power?


Yeh its awesomeness lol.. My s300 is tuned with a nice hefty vtec curves all across the ranges... Low or high end put ur foot down the rpm/speedo climbs up without any struggles.



Wurrdd.. Helps aswell with a good tuner and im running on E85 fuel too..



Originally was going down the forced induction path.. But since i alredy have a turboed fozzy xti (225awkw) there was no point in having another turbo car.. Not worth the fuel costs nowadays.

Thas right nice hefty empty pockets with a hole through it.. After u sum up all te costs involved.

But at the end.. 146fwkw on normal tune and has plenty of potential for my v2 final tune. Hoping at least 155+kw ..

[tripleuse]

Thank you for all your responses. I shouldve maybe clarified from the start that i will be needing the car to last, i will be doing over 40000 kilometres per year and the last thing i want is unecesary fixes that i will have to do. Either i build a b20b vtec or get a b18c, either way you look at it, i want something to last

Regards

b20 man by the time u spend money on the b18c u can build a decent b20. plus more torque and more power. and b20s have been proven to be reliable.

[IV73CI]

b20 man by the time u spend money on the b18c u can build a decent b20. plus more torque and more power. and b20s have been proven to be reliable.

tru that.


wot u got done to ur b20 to get that power?

Bottom End Build:
CNC Machined and balanced crank
Eagle Rods
11.3.1 CR

Top End Build:
ITR head
Supertech valves, springs, retainers
ARP Bolts
ITR IM matched ported
Stage 2 Rocket Mx Cams H/L profiles
S90 TB 70mm
440cc Injectors
Works Fuel Rail
Breather kit
Walbro fuel pump

Gearing
ITR LSD GB
Exedy Lightened F/Wheel
Exedy Stage 2 clutch


Zorst
Tri-Y Big Fat tubes 2.5inch collector
2.5inch Mandrel Bend B-Pipe
High Flow CAT
Twin loop Muffler

ECU
S300 tuned on E85 V1 V2 (final tune to be done)

thats about it just waiting on a V2 final tune as ive installed new parts and need to make use of its potential.

[manonastick]

Building a b20 vtec isnt that hard right??
I heard the b20 block needs to be reinforced is that true?.
Hear too much people saying bolting the head and new pistons plus a good tune can make a reliable b20 vtec.
If i can build one running at 110atw ill be happy if alli need is head + pistons + b20 block.

[blabla]

Building a b20 vtec isnt that hard right??
I heard the b20 block needs to be reinforced is that true?.
Hear too much people saying bolting the head and new pistons plus a good tune can make a reliable b20 vtec.
If i can build one running at 110atw ill be happy if alli need is head + pistons + b20 block.

stock bottom end will give 110-120 atw as per some builds on this forum.

[exquisit]

who tuned it?


tru that.



Bottom End Build:
CNC Machined and balanced crank
Eagle Rods
11.3.1 CR

Top End Build:
ITR head
Supertech valves, springs, retainers
ARP Bolts
ITR IM matched ported
Stage 2 Rocket Mx Cams H/L profiles
S90 TB 70mm
440cc Injectors
Works Fuel Rail
Breather kit
Walbro fuel pump

Gearing
ITR LSD GB
Exedy Lightened F/Wheel
Exedy Stage 2 clutch


Zorst
Tri-Y Big Fat tubes 2.5inch collector
2.5inch Mandrel Bend B-Pipe
High Flow CAT
Twin loop Muffler

ECU
S300 tuned on E85 V1 V2 (final tune to be done)

thats about it just waiting on a V2 final tune as ive installed new parts and need to make use of its potential.

[stndrd]

BYP tuned

[IV73CI]

BYP tuned

^^^ thats right :) FTW!

[IV73CI]

Building a b20 vtec isnt that hard right??
I heard the b20 block needs to be reinforced is that true?.
Hear too much people saying bolting the head and new pistons plus a good tune can make a reliable b20 vtec.
If i can build one running at 110atw ill be happy if alli need is head + pistons + b20 block.

correct.

you need to rebuild the bottom block to ensure it hand handle the VTEC power and extra pressure.

keeping in mind that the B20 never was built for vtec, so therefore you will need to ensure you have a breather kit, and the oil pressure return to the VTEC head otherwise VTEC will not engage.

[TODA AU]

^^^ thats right :) FTW!

You know that motor in the previuos EG, it made just over 160kw (Tuned by DD)
But since the original cam pulleys were removed & the cam timing was never re-set by Dave,
I guess that would account for some of the power loss.

[Mr.Brightside]

You know that motor in the previuos EG, it made just over 160kw (Tuned by DD)
But since the original cam pulleys were removed & the cam timing was never re-set by Dave,
I guess that would account for some of the power loss.

It also had ITB's, straight through and bigger exhaust, no aircon and no P/S

OP, have you considered going k series? Thats another option and will be in your budget if your looking to build a B20.

[IV73CI]

You know that motor in the previuos EG, it made just over 160kw (Tuned by DD)
But since the original cam pulleys were removed & the cam timing was never re-set by Dave,
I guess that would account for some of the power loss.

thats right Adrian .. do u recall what cam pulleys it had? coz right now it still has adjustable cam pulleys ..but the cam timing was detuned by previous owner.

my final V2 tune would involve cam timing, s300 touch up, fuel delivery, 70mm tb matched ported IM.


It also had ITB's, straight through and bigger exhaust, no aircon and no P/S

OP, have you considered going k series? Thats another option and will be in your budget if your looking to build a B20.

correct.. the ITB's made the extra power .. dunno bout the exhaust size ...as mines got 2.5inch now ..

i initially wanted to Kswap ..but it was way over the budget ... 10k+ kswap ...might as well buy another car.. lol

[ALLMTR996]

tru that.



Bottom End Build:
CNC Machined and balanced crank
Eagle Rods
11.3.1 CR

Top End Build:
ITR head
Supertech valves, springs, retainers
ARP Bolts
ITR IM matched ported
Stage 2 Rocket Mx Cams H/L profiles
S90 TB 70mm
440cc Injectors
Works Fuel Rail
Breather kit
Walbro fuel pump

Gearing
ITR LSD GB
Exedy Lightened F/Wheel
Exedy Stage 2 clutch


Zorst
Tri-Y Big Fat tubes 2.5inch collector
2.5inch Mandrel Bend B-Pipe
High Flow CAT
Twin loop Muffler

ECU
S300 tuned on E85 V1 V2 (final tune to be done)

thats about it just waiting on a V2 final tune as ive installed new parts and need to make use of its potential.

This engine has
NO CNC crank work where that came from I have no idea
Bearings are ACL Race Series
The conrods are SCAT
Pistons are RS Machine 84.5mm they have a 3.5cc dome based on USDM ITR pistons
Head studs are ARP
Cams are Rocket Motorsport M22x
Cam gears where Skunk2 Tuner series

CYL Head is a STD ITR
yes Supertech flat faced valves,Springs,Titanium Retainers
Combustion chambers where CNC machined to 81.5mm bore

[IV73CI]

This engine has
NO CNC crank work where that came from I have no idea
Bearings are ACL Race Series
The conrods are SCAT
Pistons are RS Machine 84.5mm they have a 3.5cc dome based on USDM ITR pistons
Head studs are ARP
Cams are Rocket Motorsport M22x
Cam gears where Skunk2 Tuner series

CYL Head is a STD ITR
yes Supertech flat faced valves,Springs,Titanium Retainers
Combustion chambers where CNC machined to 81.5mm bore

wow thanks dude...i only knew some of the actual specs..

but yes thats what i meant ..CNC machined combustion chambers.

but the Crank has been balanced (apparently)

now i know the brand of the cam gears.

Yes CYL head is std ITR it hasnt been ported etc.

extra stuff i didnt know exactly what was done/put on.

How do u know so much about the build?

i know DD built it .. and its suppose to be a strong motor. yes / no?

[Mr.Brightside]

ALLMTR996 = Dyno Dave

[ALLMTR996]

And your point?

Its just good to see that engine still running we all had alot of fun with it and learnt heaps from the developments we did when I was helping the boys.

[IV73CI]

And your point?

Its just good to see that engine still running we all had alot of fun with it and learnt heaps from the developments we did when I was helping the boys.

my point is ..that you guys did a great job in building it ..and buying a built motor is something that i would want to know more of if its a well built strong motor :)

i only knew DD (you) with his old screen name as DynoDave ...

u dont remember me, but i was the one who bought Marlons old Lancer with the turbo honda frank in it ...(Jordans aka BAL11W - old motor)

so strong build yes/no?

[ALLMTR996]

Damn blast from the past.

Yes its a very strong engine the boys really tested it and we never had any problems.

[ALLMTR996]

I was answering op's question, problem?

No problems

[Vvvtec]

is it just me or are things heating up in here?

Why everyone so defensive?

[CRXDEL501]

tru that.



Bottom End Build:
CNC Machined and balanced crank
Eagle Rods
11.3.1 CR

Top End Build:
ITR head
Supertech valves, springs, retainers
ARP Bolts
ITR IM matched ported
Stage 2 Rocket Mx Cams H/L profiles
S90 TB 70mm
440cc Injectors
Works Fuel Rail
Breather kit
Walbro fuel pump

Gearing
ITR LSD GB
Exedy Lightened F/Wheel
Exedy Stage 2 clutch


Zorst
Tri-Y Big Fat tubes 2.5inch collector
2.5inch Mandrel Bend B-Pipe
High Flow CAT
Twin loop Muffler

ECU
S300 tuned on E85 V1 V2 (final tune to be done)

thats about it just waiting on a V2 final tune as ive installed new parts and need to make use of its potential.

not a bad list lol :thumbsup:

[ALLMTR996]

is it just me or are things heating up in here?

Why everyone so defensive?
All seems normal to me.

[IV73CI]

All seems normal to me.

^^ x2 all normal in here ... :)

just clarifiying some very helpful info ..

and DD - yes blast from the past i tellz ya..

good to hear your still in your game/cars :)

[ALLMTR996]

^^ x2 all normal in here ... :)

just clarifiying some very helpful info ..

and DD - yes blast from the past i tellz ya..

good to hear your still in your game/cars :)

Your engine also had a Circuit Worx cromemoly oil pump gear as well.

[IV73CI]

Nice.. So alot of hard workmanship, quality parts, and hours has been put into this build.

Do u knw if its a requiremet to get a blockguard or sleeve it?

Could i run a turbo kit @ 17psi with the current engine build?? Or the sleeves not strong enuf and the CR is too high?

[Chr1s]

^ lol.

Dave is going to shoot you for suggesting that... just leave it - too much effort was put into that one engine to **** it for a turbo kit, let alone the high comp nature. Get him to build a seperate motor for boost...

[IV73CI]

^ lol.

Dave is going to shoot you for suggesting that... just leave it - too much effort was put into that one engine to **** it for a turbo kit, let alone the high comp nature. Get him to build a seperate motor for boost...

Tru dat..

A k20/24 boosted monster.. Lol

[GSi_PSi]

Tru dat..

A k20/24 boosted monster.. Lol

you wanna chirp 5th ? lawl

[ALLMTR996]

B20Vtec's are easy to build with STD rods/ARP rod bolts and PHK pistons (B20B8) with the valves reliefs done they are a great all round engine and will spin to 8400rpm all day, the cyl head and boltons are where the power comes from and this is where the costs build up.My last STD piston/conrod engine made 121kw with STD B16a head combo and 146kw with P72 ported head full supertech valve train,Buddyclub spec5 cams,725cc injectors,E85,Toda header with 2.5" exhaust,Edelbrock Performa X manifold with 68mm Omni TB and a copied Mugen intake setup.When you work out the cost of this type of engine the if you have no parts at all and are doing a conversion it really is cheaper to go K engine in the long run.The one issue with a B engine is gearing and this is where the K has it all over the B or any other Honda FWD engine.

[IV73CI]

^^^^Can i get an Amen....

[GSi_PSi]

Also dat sweet VTC +