1slow01Z71

iTrader: (36)

I already know pretty much the specs that I want but would like to get opinions from people that have been there and done that. I would appreciate it if people with actual experience with strokers and larger cams would chime in.

418ci
235cc intake runner heads or larger 330 range on intake cfm(havent decide for sure on the heads but all that I have looked at are in this ballpark)
3.73 gears
all bolt ons lts etc etc except e-fans (still rockin the clutch fan )
3900 stall at the moment it will be tightend up to 3600ish
The current cam is 237/242 595 595 112lsa and its way too small. I want alot more topend . In 4hi back when motor was running right it would spin all four for 15ish feet. I realize alot of that had to do with the high stall but I want the high stall for the track too when Im running big slicks.
This motor will see ALOT of nitrous (ie. 300+hp shot dual stage)

Emmissions is obviously of no concern.

TURBHOE

iTrader: (4)

t-rex, magic stick 4, texas giant. just to name a few. no real experience here but would like to know. and have you thought about the l92 heads?

http://www.texas-speed.com/shop/item...d=171&catid=44

1slow01Z71

iTrader: (36)

Havent seen anything on the L92 heads. They worth looking into? From what little I have heard about them theyare great from the factory intake wise but need a little work on the exhaust port. The texas giant looks pretty good the trex cam is on a 110lsa so its not going to be that friendly with nitrous. Im looking for big duration with about 113lsa pretty much. The MS4 is too small thats pretty much what I have now within a *.

TurboGibbs

iTrader: (6)

As you know I haven't ran a very big cam in a gen3 but I have done a lot of tuning on a 409ci sbc that I can share. This was all on a 71 Nova with a 4 speed. I had a 248/248/.590.590 110lsa solid roller cam, 10.1:1 comp, ported double hump heads 2.02/1.60 vlvs(approx 180-190cc intake runner), I did many gear swaps from 3.70's-4.56's and everything in between. I swaped to a set of victor Jr 215cc heads with 2.08/1.60 valves and they lowered my compression to 9.7:1(they flowed 275cfm @.600 I think). I swaped from low rise intake, to high rise and carbs from 750-850. I logged probably 200 passes on these setups in total and was always stuck in the 7.60's range in the 1/8th. All changes made virtually no difference with a best time of 7.59. I then swaped pistons and bumped the compression to 12:1 and running race gas of course. I did not pick up one single bit . I could then obviously narrow it down to one thing and the cam was too small. I told all this to Donny @ the speed shop and he blerted out before I even got done telling him everything I had done, "you need more cam". I would have never figured it would have held me back like it did.
Basically with as loose as a converter you have, regaurdless of weight, I would go with the 245/255 110lsa range personally. The moderate to wide LSA will still work well with your nitrous and be more tame on the road. The only reason I had as wide of an lsa is due to being a N/A 4 speed and needing a more broad powerband and more tame on the road for everyday driving. That big stall of yours takes care of those issues and the cubes should give plenty of torque for when the converter locks. If you do have issues with the converter locking at cruise(as in it lugging or bucking) just don't lock the converter in the programing. It's not like it is a DD gas milege machine

BenKey

iTrader: (1)

I would go with a FMS cam. I have not dyno'd mine or run at the track to give any proof. There is plenty on LS1tech however. His stroker builds are some of THE best out there for a LSx motor. Go to his website and send him an email. Tell him all you have and what you want to do and see what he says. Just a suggestion - take it or leave it.

TURBHOE

iTrader: (4)

the l92 heads stock out flow alot of stage 3 heads on the market. https://ls1tech.com/forums/showthread.php?t=483486 hear look for your self. i compared these to the patriot ls6 stage 3 heads and the l92's have better numbers. and you can get them for around $750-$900 for the set.

Yelo

The L92 head requires alot of additional pieces to work....intake, TB, injectors, etc, and I'm not sure the L92's intake is available yet

I'd be looking in the 235/239 or 239/242 range for a good cam....

TurboBerserker

iTrader: (1)

Honestly, these strokers can handle A LOT of duration. My cam is SMALL for a 408 (doesn't lope at all), while still being pretty damn big. I'm not sure how tame it would be, but I'd look into a 250ish/256ish on a 112-114 for your setup. As MJ said, you already have plenty of torque and can benefit from the big duration. The cam MJ suggested would also work like a champ -- I've heard clips of a 427 (C5R) with a 244/248 that sounded like a monster. Unfortunately, I don't know how it performed and never will.

TurboGibbs

iTrader: (6)

LOL! I went back and re-read my post. I meant to say to start looking in the 245/255 range.

1slow01Z71

iTrader: (36)

I thought I remembered reading some modifications were needed and at this point the less money I have to spend the better My cam is a 237/242 so switching to a cam you suggested would be a mute point.

I may buy that guys cam then Mark sounds like it is right in the range that I need. Its a 248/25X 113 if I remember correctly. I just want to make sure Im not going to have any lag between stall speed and when the cam really turns on. The way it is now with it flashing to 3900 and the current cam it pulls HARD and I want it to stay that way. I didnt like at all how my 5.3 with the 222/224 112 with a 3K stall acted it seemed to all the sudden turn on at 3600ish then haul a$$. Im wondering if a 3600 stall and a high 240s low 250s cam is going to give me any lag rpm in the midrange