stroker... best street cam?

[lambertvr4]

I'm building a 2.3L for the street and am trying to decide on cams. I'm shooting for ~350wHP, so I hope to keep this tame (read: good idle and lowend).

Engine: 8.5:1, ported head, SS valves stock size, Crower springs/retainers
Intake: sheet metal intake manifold, PTE SCM50 with .63AR, big FMIC,
Exhaust: 2G exh mani, O2 eliminator (back in), 3" DP/Exhaust
Tuning: VPC, chipped ECU
Fuel: 660s, Walbro 255, AFPR

As you can tell, this setup is not intended to run to 8000RPM all the time. I really want torque. Hence the big engine and small turbo.

So does anyone have experience with aftermarket cams with the stroker/4G64? I don't know if the 2.3L will tame the supposed funky idle of the 272's. I hear the FP2s may be better at idling. I'm afraid I may kill the lowend with bigger cams like these though. I may be better off with the FP1s/264s, but I'd hate to choke off the topend if I would be happy with the bigger cams.

I'm leaning towards the FP1s unless I hear good reviews of 272s/FP2s on a stroker. Any opinions or experiences?

Thanks in advance.

 

[liquordrunk]

Well since you are runnin a 2.3 you wont have to worry about low end torque it'll BE there specially with runnin the scm 50 im guessin your goin with the 50trim not the 48trim
there fore runnin FP2 imo would not hurt you with low end torque!
having a 2.3 creates so much MORe torque at lower rpms than the 2.0 and you would nt choke off the motor with FP1's unless you rann LOTS of boost At goobs of RPMS. My frineds 97 i have watched the dyno for it from the stocks cams to 272/272 and l ow end torque was gained! even being it was from stack cams but he runs the 2.4l

 

[500orbust]

Hey Lambert,
THis is Archie, I didnt have any problems with the 272's I ran w/ my stroker. Idle and drivability was great. I had full boost (10psi) at about 3500 also with my pt61. Don should have my dyno runs on file if you want to take a look.

archie

 

[herostar]

Streetability with the stroker and cams shouldn't be a problem. With my stock head I still get 20 psi with my 60-1 by 3500 rpm in 3rd on my 2.3L. Cams will just make it better. 350 hp on a stroker is going to be cake. Should easily be attainable with 18psi on the 50 trim.

 

[lambertvr4]

Damion is running those big custom Web's Polk spec'ed and they aren't too bad. I believe they are more aggressive than the 272s.

I am leaning towards the FP2s since I haven't driven it yet and won't know if I lost lowend or not. The porting, sheet metal, and cams will swap some lowend for topend, but the displacement and small turbo should make up for it though. Without having an A-B comparisson, I don't know what lowend I'll loose with the bigger cams compared to the 264s.

 

[swordfish]

What's up big bert. For the price the FP2's probably cant be beat. Bus runs the 272's in his 2.3 and I run them in my 2.4 and you cant even tell our cars have cams at idle. The bigger displacement still pulls a lot of vacuum at idle and makes the 272 perform more like a 264 so there is a lot of mid range. Back when Bus' 2.3L with 272's had the sleeper 16G it was rediculous. That was the funnest every day street car that I had ever driven. It made 361whp and like 385 tq at 21 psi on pump gas with an AFC. I thought I still had the dyno sheet to show you but nevertheless the power was on really really early. No downshifting. Just punch it and go.

The larger displacement setups really need something bigger than a "272" to be considered a big cam. My 272's are out the door whenever I can get my hands on the bigger FP3 or whatever cams.

jeff

 

[Polk]

We'll get you hooked up Lambert.

 

[lambertvr4]

Are you or Bus running the sheet metal intake? Polk has the wider runner design for the stroker, but I'm thinking of using the "thinner" 2.0L design to keep the lowend. Considerring how much better the intake runners will be than stock I think it will be fine. I'll probably use the stock TB with IAC to keep things tolerable. I don't see a big restriction there on the 50 trim.

I doubt the 50 trim will have the immediate boost that the sleeper 16G has, but it should be nice. I doubt I run more than 20psi. I'm afraid if I do the turbo won't be able to keep up. 2.3L at 7000RPM and 20psi will be pushing the airflow limit of that turbo. The FMIC (big PTE) won't have a problem cooling it off, but shaft speed on the turbo may get a little too high. I cryo'ed the turbo though, so hopefully it will stand up to a little abuse.

 

[swordfish]

Bus and I are both still running stock TB's. Bus is running the Polk stroker sheet metal intake and I am running the stock 1G. Even with the T66 Bus's car is great on the street.

Lambert I am running one of the SCM61 turbos (still internal gate) with a P trim turbine wheel instead of the normal T350. Full boost is about 4100-4200 even with the big turbine wheel. I figure with that 50 trim and the T31 turbine you are going to get full boost in the very low 3000's on the 2.3L.

jeff