DA9 B18a (turbo) V B18c

Printable View

Show 80 post(s) from this thread on one page

11-01-2006, 12:40 PM
string

Quote:

Originally Posted by A-man

its like buyin a commodore of a p plater lmao

my mates bro took me for a spin in his dc2 its a vtir and that thing flew second gear 110 i was impressed.... and wit a 9 grand redline....

he was also sayin bout it being more fuel effiecent is that true??? in a way i can see how it could be because when the vtec isnt on its only using two valves right??? (b18c is only a 3 valve right?)

If fuel efficiency is a concern for you, modifications are not for you, so get the idea out of your head.

You need to learn so much more about cars before you even consider an engine swap or turbo. All B series motors are 4 valves per cylinder. Vtec does not enable or disable any extra/less valves. It increases duration and lift.
11-01-2006, 12:47 PM
IN73GZ

Quote:

Originally Posted by string

If fuel efficiency is a concern for you, modifications are not for you, so get the idea out of your head.

You need to learn so much more about cars before you even consider an engine swap or turbo. All B series motors are 4 valves per cylinder. Vtec does not enable or disable any extra/less valves. It increases duration and lift.

^^^^^^^^^^^^ :thumbsup:
i think he has mistaken the extra valve for an extra cam lobe. the vtir is a twin cam with an extra cam lob which is put to use when vtec is engaged. this is seperate to your valves which lift which vtec kicks in.
12-01-2006, 12:20 AM
A-man

yeh sry guys i wasnt thinkin this morning

the b18c has 4 valves per cly yeh?

im moving closer to my tafe and stuff now so fuel isnt really a issue but is it true u can get more economy from a vtec as opposed to a non vtec for normal driving?
12-01-2006, 04:14 AM
yourfather

B18C is the JDM engine code, not B18C5.

And yeah it has 4 valves per cylinder, so that's 16 valves all up.

2 camshafts obviously, int, exhaust.

VTi-R does not redline at 9k, it redlines at 8.
It does not do 110 in 2nd gear at redline, it does about 102km/h

Fuel economy depends more on the displacement of the engine and the weight of your right foot, plus the condition of the mechanical parts in your engine rather than the type of head it has.

It is true that you can get better fuel economy from having variable valve timing. Plus, you get a flatter torque curve, which means that the engine 'pulls' more evenly across the range.

As has been said by DynoDave, TODAau and a myriad of other well respected people on this forum, Honda engines are well engineered, and can be run very reliably with boost, whether that engine is modified or stock.

From what I have heard you can run between 7-10 lbs of boost with a stock engine with a good tune.

There are a lot of people on here who seem to know how to tune, and know a lot about the hardware required.

Building your own turbo kit costs about 4-5k just for parts, if you're going to do it yourself.

Tuning is 1.5K including a standalone ECU, depending on your engine.

obviously with the engine, if you aren't acheiving good compression because of engine wear and tear, you might need to rebuild, which is when you do the forged internals thing.
12-01-2006, 10:32 AM
IN73GZ

Quote:

Originally Posted by yourfather

B18C is the JDM engine code, not B18C5.

And yeah it has 4 valves per cylinder, so that's 16 valves all up.

2 camshafts obviously, int, exhaust.

VTi-R does not redline at 9k, it redlines at 8.
It does not do 110 in 2nd gear at redline, it does about 102km/h

Fuel economy depends more on the displacement of the engine and the weight of your right foot, plus the condition of the mechanical parts in your engine rather than the type of head it has.

It is true that you can get better fuel economy from having variable valve timing. Plus, you get a flatter torque curve, which means that the engine 'pulls' more evenly across the range.

As has been said by DynoDave, TODAau and a myriad of other well respected people on this forum, Honda engines are well engineered, and can be run very reliably with boost, whether that engine is modified or stock.

From what I have heard you can run between 7-10 lbs of boost with a stock engine with a good tune.

There are a lot of people on here who seem to know how to tune, and know a lot about the hardware required.

Building your own turbo kit costs about 4-5k just for parts, if you're going to do it yourself.

Tuning is 1.5K including a standalone ECU, depending on your engine.

obviously with the engine, if you aren't acheiving good compression because of engine wear and tear, you might need to rebuild, which is when you do the forged internals thing.

YOU HEARD THE MAN!!!! :cool:
12-01-2006, 11:27 AM
crx_boy7

don be so harsh -hes obviously not had as much experience as you guys when it comes to honda engines
from wat iv seen turbo b-seres blow up due to parts and mods been left out ie tv seen so many turbo bseres run pcv valves fron their stoc position which causes lio to be spat into ur intake or too much boost on stock sensors cause the ecu to take a crap or sandard gap plugs on full boost ect ect

of u know what ur doing and just sit and think befor u do a turbo it wont throw up however a safe setup is 5g min to run 10psi with no junkyard turbo crap

turbo will be allot cheaper on money to power no a b18a compared to buying installing a b18c but si atot more complex to do properly than as stock motor being thrown in
(for sum reason in allways type 'si' instead of 'is' and then hav to correct it all lol)
12-01-2006, 11:29 AM
crx_boy7

sorry about my very bad spelling
12-01-2006, 11:52 AM
yourfather

i dont think I was being harsh, just stating the facts as I knew them, and I could be wrong.
12-01-2006, 05:16 PM
A-man

Quote:

Originally Posted by yourfather

B18C is the JDM engine code, not B18C5.
VTi-R does not redline at 9k, it redlines at 8.
It does not do 110 in 2nd gear at redline, it does about 102km/h

i didnt say it was a stock vtir donk it had been tuned and had breathing mods and i kno wot i saw.....

im more of a toyota person and only since ive had the honda (few months) ive been learning bout em.... and i think im doin pretty good wit the stuff im learning.
12-01-2006, 06:02 PM
ProECU

Quote:

Originally Posted by locote

i have a gsi and i get lots of wheel spin if i launch it hard, i know a vtec will spin even more!!!

There's a lot of Bullshit floating around these forums.

Vtec does not engage in 1st gear under hard launch conditions because the VSS sensor is not registering a minimum speed requirement for the ECU.

Try it, launch at 5k rpm and tell me if vtec engages.
12-01-2006, 11:10 PM
IN73GZ

Quote:

Originally Posted by ProECU

There's a lot of Bullshit floating around these forums.

Vtec does not engage in 1st gear under hard launch conditions because the VSS sensor is not registering a minimum speed requirement for the ECU.

Try it, launch at 5k rpm and tell me if vtec engages.

first i think you have to define hard launching conditions, ive seen it kick in under this type of launch, one of my mates had a vtec light set up and it kicked in when he launched at 5k rpm.
so tell me again, sorry whats that i can smell??? hmm yeh think it was bullshit
12-01-2006, 11:52 PM
FR33K

Quote:

Originally Posted by ProECU

There's a lot of Bullshit floating around these forums.

agreed..

Quote:

Originally Posted by ProECU

Vtec does not engage in 1st gear under hard launch conditions because the VSS sensor is not registering a minimum speed requirement for the ECU.

agreed..

VSS must pick up a certain speed before vtec engages.. ie vtec does not engage revving it in neutral while stationery.. but it does if your rolling in neutral.
IN73GZ ur mates vtec probably engages with a 5k Launch coz hes sitting on the spot spinning his wheels.. therefore the ECU thinks the car has reached the minimun speed

Show 80 post(s) from this thread on one page