Well motor is coming out as we speak today to diagnose the issue (seems to be the headgasket has let go) and when it goes back together im changing it up a little bit since my 2871's appear to be maxing out (or could possibly be the cams not flowing enough as to which that is im not sure)

Im looking to do cams and all that accompany them, having a hard time deciding on sizing though. i think a 264 in and out would be adequate but i dont want to get those in and still not flow enough on the top end, but im afraid a 272 will take too much off the bottom.

And as far as turbo sizing im limited by the small t25 gtm manifolds.
so im limited to a few options:

this in a .86 AR
http://www.atpturbo.com/mm5/merchant...Category_Code=

or this with a gtx wheel but a smaller .72 AR
http://www.atpturbo.com/mm5/merchant...Category_Code=



For refference currently have vq35hr (now 4.07L BC stroker)
8.59:1 cp pistons
ported and polished heads
cjm twin hangar and full return
currently dw850cc injectors (thinking of swapping to id1000's if i change turbos)

thoughts/advice on what you would do?

 

Gtx3076!

 

even with the smaller .72 ar housing though?

 

also was talking with my fabricator at work and he was saying he could cut the t25 flange off and either weld or braise on a t3 flange on the gtm manifold to fix the issue

 

I'm running the 262 cams from JWT with no issue with my 3071R with billet wheel

You don't want your power to go too high on the RPM range unless you want to always be high in the RPM range to get power

 

are you single or TT? hows the power band with the 264's

 

i made my 900whp on 264 cams.

 

264s should be more than fine then. i just wanted to break above the 700 mark. need to sort out the turbo situation now

 

hey sorry for stepping in , but I am also looking for cams and cant decide if I should do 262 or 272. I'm single 6765 with a rev up no port or polish, stock valves , upgraded springs.

If someone could recommend which cams I should get, Since I'm already moving the power to the right with single turbo would 262 give me more mid range and lower top end? or should I just go 272 since I wont make much power in mid range anyway ???

 

I was mistaken my cams are 262 JWT S7R and I'm running twins

I have a dyno graph with a slipping clutch
Next month I'm going for a new tune and will have a better graph for you
but if you with too aggressive a cam your power range might be too short and high in the RPM range

 

thats why I'm debating between kelford turbo stage 1 or stage 2

stage 1
256 intake duration/10.50mm lift, 264 exhaust duration/10.5mm lift.

stage 2
272 intake duration/11.0mm lift, 272 exhaust duration, 11.0mm lift.

or one of the Tomei cams ...

 

im still waiting on them to show up but i went with something alot of the domestics do and am running a reverse pattern vs the square pattern most of the vq people are running. stage 1 NA kelford intakes and stage 2 FI kelford exhuast, it should give me the breathing on the exhuast side to still rev it out but leftshift the powerband some because of the NA style intake cams. i just will have to run more boost to hit the same power as others with bigger intake cams, which is fine since you really cant take full advantage of the billet precision wheels till 28+ psi thats where they really start flowing more then the cast wheels according to my talks with precision.

i will admit i have no idea how this style setup will work on a engine with variable valve timing though.

 

I'm probably just going to go with stage 2 FI kelfords and hope I get some what ok power below 5k rpm... plus only planing to run 22psi since thats what the internal MAP in my haltech supports. Dont want to get external MAP coz I will just push for more and more boost

 

You should get the external map, I'm fairly sure that the internal has a lot more "lag" because you have to run a longer reference line.

 

I'm running the GTM cam that is very similar to this, I think the lift is a little different, but I like em, I'm not making anywhere close to the 700 mark though, my turbos are too small

 

What are you running or what boost?? My goal is 650 with 6765

 

I went with BC stage 3's with my big 76 mm single.. Not worried one bit!

 

I'm running a very modified JWT 700 kit, had some issues with my turbos dieing on me so I had a buddy make me some Frankensein's that are a little different the the GT2871's the kit came with. The plan is to run about 22-25 psi and shoot for 550-575 at the wheels, but I dont have any head work other than cams and springs right now. I've got another set of heads that I'm going to build this winter though.

 

I always thought you didn't need headwork till 700+ whp

 

my stock cams seemed to have peaked out around 670