ella94

This is becoming such a headache, staying up late at nights trying to figure out what **** to use on my car. This weeks diliema --> Camshafts...

Alright heres the setup 411:

B16A SiR-II
Supertech Valve Springs/ Ti Retainers
T3/T40e Turbocharger .48 A/R
Factory Camshafts
B16 Y21 Tranny (yeah, the really short *** gears)
Street Car
Looking to make 300-350whp on low boost


Big Question: What Camshaft would be best to use to make a more powerful band?
Some things to consider are it is a street driven vehicle. As much as I'd like to see that max power climb at some high rpm point, 90%+ of my driving is below vtec. These cams dont have to make power from idle to 5,000 but i surely dont want to lose any. I believe the powerband of my turbocharger is somewhere around 4000 - 7500/8000. Someone chime in on this. The turbo is not yet installed but with the relatively small .48 a/r this charger should deliver boost pretty quick, in theory. With a upgraded valve train, the factory rev limit of my SiR-II (8000) can be moved up a bit if needed for a better powerband

Overall I want cams that will produce more power just about everywhere in the powerband and pull hard to 8000-8500. Id like to stay away from the 9000s if possible. I think the turbocharger I picked is to small for anything higher anyways.

My camshaft of choice atm is CTR. Ive heard about 3x more good than bad. Ive heard they pick up EVERYWHERE in the powerband. With Supertech springs/retainers, i should be ok with just about any cam i choose, right?

Everyone post up your thoughts and knowledge. Thanks!

97CWITR

CTR/ITR cams will make power throughout. They will be a nice upgrade over your stock b16 cams

No sense loosing any sleep over it

JDogg

what exhaust manifold do you have???

if you have a crappy log/cast manifold, keep the b16 cams or get some gsr cams.

itr/ctr cams dont work much better than b16 or gsr with that type of turbo manifold.

i just reread it.. you have a .48 a/r... you deffinatly dont want the type r cams, your setup will have too much backpressure to use the type r stuff.

keep the cams you have and dont worry with it. the turbine housing is going to limit you long before the cams do

sycamore

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">what exhaust manifold do you have???

if you have a crappy log/cast manifold, keep the b16 cams or get some gsr cams.

itr/ctr cams dont work much better than b16 or gsr with that type of turbo manifold.

i just reread it.. you have a .48 a/r... you deffinatly dont want the type r cams, your setup will have too much backpressure to use the type r stuff.

keep the cams you have and dont worry with it. the turbine housing is going to limit you long before the cams do</TD></TR></TABLE>

you tubo is very small it will be boosting at like 3,000(thats what my friends was on his ls)

ella94

Thanks for the comments guys. Is my power goal unreal then? 300-350whp on .48 a/r?

Its a Drag 4-1 Manifold. Ive heard its a excellent piece for street use on low boost levels. The bad wastegate placement makes it leak at higher pressures but I dont plan on boosting anywhere near 20psi. Not to mention its cast iron and is pretty tough when it comes to cracking under heat.

By the way, im going to be running 3"dp and 3" straight back. Still to much backpressure or what? I know the 3" exhuast helps but .48 a/r will still produce tons of backpressure. Id really hate to waste $800+ on a new valvetrain setup that my engine wont benefit greatly from. Thanks..

TurboEM1

iTrader: (1)

GSR cams end of story.

ella94

ttt

Need some more opinions...

TheHooded_Mike

As stated before...anything more than gsr or ctr cams is gonna be too wild for your setup. I'd say gsr though. Are you keeping the bottom end stock? You'll just lose power down low if you go bigger than CTR. BTW, you don't need any cams to make the 300-350 you're looking for.

ella94

The bottem end will consist of Forged 9:1 pistons and rods. Choose not to sleeve my "low" whp setup.

But if I can easily break 300-350whp range with this turbo and a good tune, whats the point then? I guess I'll stick with the SiR-II cams.

TheHooded_Mike

Ya, I would stick with the stock cams with that compression...anything bigger and you'll definitely lose power down low. You could make almost 400whp with that setup let alone 300...

Tornadom

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboEM1 &raquo;</TD></TR><TR><TD CLASS="quote">GSR cams end of story.</TD></TR></TABLE>

ella94

why spend cash on something i dont need?

I'm keeping the factory cams, thanks everyone for the input. If I had decided myself, I probably would have went with CTR, since everyone is making nice numbers with them and they pick up everywhere ive heard. That plus a built valve train would run me close to $800 + having someone install them right.

A good pair of adj. cam gears and my valvetrain is complete

sirguy01

i'm gonna be using itr's on my turbo set up, i've seen ppl make 500whp with these. Thats my goal.

ella94

Ah yeah, i guess SiR-II cams will work great then for my powergoal. I just want a low boost setup making close to 300whp while retaining my extremly small exhaust turbine. Low boost, .48 a/r, small turbo, and b16 tranny. Got to be insane acceleration for the streets.


Anyways, thanks again to everyone who helped me out. Like I said before, a built valvetrain would definatly run me over $1000 for something I dont even need for my goals out of my b16.

JDogg

the .48 a/r is going to kill you.. i wouldnt expect more than 250-275 w/o having to run a bunch of boost.

what turbine wheel does the turbo have? and what a/r is the compressor?