cuzzfolk99

Which would be better to sleeve and boost? Im planning on turboing it and it will be somewhat a DD. Which would produce more torque and what size bore does the b20 have stock? I will be putting a b16 head on it and running a ls tranny. thanks

iwanttokillgod

what is a b10/tec

teamcalloway08

lolwut?

rSol93

lolwut?

DSRxCandyh2bEG

iTrader: (4)

b20= 84mm bore
b16/b18 = 81mm bore
b20 = more trq.
b10 = WTF@?!?!@>@?!@ 42mm bore?

Punctuation= makes things much clearer, you sound like your on one.

cuzzfolk99

sorry fixed it bump

cuzzfolk99

Ttt

Boostage

I sleeved my b16 and used Pauter rods, wiseco pistons and a fully built head years ago. and I will never do that to a street car again. its completely not worth it for a daily driver. it was a result of too much reading on HT. you get the sense that going overkill is ok, or that its not worth going boost unless you shoot for super high numbers.

My advise is to do an LS/vtec with a 50 trim t04e, .63 hot side and shoot for 300hp. if you have to use the LS trans it wont be too bad with that turbo. but if possible get a gsr trans.. Sleeving a block for a street car is completely not worth it. I dont care what anyone says.

cuzzfolk99

yes i know but i just want extra security because im running a t76 setup and im shooting for 400+

Boostage

You are not going to enjoy that one bit, my goal was the same as yours with my built motor, but I got a sc61 with stage 5 wheel, basically a 650hp turbo and trying to make 400hp with it, and it sucked for daily driving. having to rev out the motor just to feel a little boost was wack. let me tell you what I am doing now if it helps you.

I am doing an lsvtec, stock sleeves, wiseco pistons about 9.5:1 and eagle rods. will be a stock b16 head with GSR cams, and a t04b. GSR trans with LS 5th. this combo should make make 300-320ft lbs. on high boost with whatever HP it works out to be Probably low 400's, combined with the stock b16 intake and GSR trans, the low and midrange should be insane even on low boost.

Forget about peak HP numbers. if you make 400hp with that turbo and run against a car with say a gt2871 also making 400hp, your going to get walked hard. it might peak the same hp, but will have much more area under the curve, and pull much harder from low speeds, leaving you to play catch up.

cuzzfolk99

My turbo shouldn't be that bad because I have a .63 exhaust side on if off a t3 so I shouldn't have to rev too much to get some power out

Boostage

Its still going to lag very bad, and its still going to suck for a daily driver. no matter how you look at it its not the right turbo for making 400hp on anything under 5 litres. the powerband is going to very peaky.

And how do you get a t76 in a t3? is it a Greddy t76 which is really a 67mm ? you cant get a true 76mm turbo with a t3 housing.

brian...

Nonsense. A car making the same power with a bigger turbo will always walk.

Boostage

I seriously hope you are joking...

400hp on a t76 wouldn't have nearly the same power under the curve as a gt2871. the power of the t76 would be peaky. if your racing from a 100mph roll sure a t76 will walk away. but not below.

and at 400hp a gt2871 would make alot more TQ than a t76 at 400hp.

cuzzfolk99

well @ the track ill be on the good ol launch control and roll races brake boosting the **** out of it so im not worried about lag so ill have the boost and everything there and the t76 is a turbonetics compressor and wheel with a t3 .63 exhaust which was put together by a friend of mine and it was AWESOME on my stock b16a2 it put 356 to the wheels on his stock b16a2 with studs so i mean im just looking to have a ls vtec just not sure weather to go b20vtec or just good ol b18b ls vtec

Boostage

You drove around on a b16 with a t76 and it felt awesome? ok then..

And if you made 356 to the wheels on a stock motor, why are you thinking of sleeving for another 40hp? clearly you have access to a competent tuner to have the stock motor hold that kind of power. and Im curious to how a 76mm turbo with a t3 housing isn't surging. there is a reason you cant buy a Turbonetics t76 with a t3 housing. a t3 turbine is too small for a 76mm compressor so whatever your friend built is not a t76 which is probably why it felt "awesome" on a b16.

cuzzfolk99

The 356 was on race gas and I want the 400 plus on pump and I just like the security of being sleeved and my bad on the turbo I talked to him he was gonna let me run his 67 mm turbo but he ended up putting the Garrett t3 t04e .60 .63 on my car. Sorry for mis info

jdm602

depends on boost levels. if your resleeving and using forged parts, the 84mm will limit you on how much boost you want to run, you can run more boost on a smaller bore.

cuzzfolk99

yes i will be using forged partsi think im sold on going with the ls motor since i have one laying around lol

Boostage

My thing is this, if money wasn't an issue, you probably wouldn't have started this thread. but if sleeving is an option for you, then you might as well just sleeve the b20 and get it over with, you will have the most displacement, having the 84mm pistons with the LS/b20 crank.

If you are more concerned about saving money, then do an ls/vtec with just rods and pistons, keep the c/r around 8.8 to 9.1 and making 400 on pump wont be an issue.


I still feel that you need to figure out what you really want out of your setup, because making 400hp peak is one thing, but making 400hp while retaining a nice powerband for daily commuting is another. any turbo that flows over 45lbs a minute can make 400hp, but not all will feel good on the street.

jdm602

back to the op. it wouldnt matter what block you use. you can have it stock bore 81mm or 2.0l 84mm.