Ive debated going with a 355, but more than likely will go with a 383 in my 88 GTA. intake will be superram plenum/runners into siamesed edelbrock base. the heads, of course infamous AFR 195s. Im just lost with the cam. i was gonna do a LPE219 with the 355, but maybe bigger will be better. Possibly a comp cams XR276(not sure if thats right or not). I want 400 rwhp,or as close as I can get, so all cam suggestions welcome. 54mm AS&M TB and 28# injectors if that helps a litle bit too.

 

If not the LPE 219, then I might try a cam around a 224/224 or maybe a 230/230 single pattern cam b/c of that intake and the exhaust flow on those heads. It would work well together. Comp could custom grind you a single pattern XE lobe cam for a good price, not much more than an off the shelf grind...

 

400 whp is shooting around 500 off the crank. And for those figures, NA, you will want a bigger cam than those. I would drop the hydraulic roller idea altogether and go solid roller. 400 whp on a hydraulic roller? You will want a power adder if your shooting with a cam like either that Chris89GTA.

Do a search for a thread that talks about 500 hp NA. You will see what types of setups it takes to get 500 crank hp (roughly 400+/-) whp.

 

would a solid roller cam fit in my stock block? how about either of these cams from crane cams: 240/248@.050 .558/.558 or 234/242@.050 .539/.558 - how well would either of these run in a 383 or a 355?

 

Yes a solid roller would fit. I am assuming that those run on 110° LSA or close. I am not very familiar with Crane cam grinds. For a 383, the first one you listed wouldnt be so bad. It could be run on a 355 platform. Youd have to have a pretty beefy stall, however. Some can live with that, some cant. If youre willing to stall in the 3000+ range, then sure either can be run. If you want a cam that will carry over to the 383, go with the first one and setup your stall accordingly. But keep in mind, a solid roller valve train is not cheap. Of the 4 types (hydraulic flat tappet, hydraulic roller, solid flat, and solid roller) the solid roller setup is by far the most expensive. If you get a solid roller cam, you need new lifters. You will need new valve springs and probably retainers as well. I would recommend some high end keepers as well. Of course, pushrod length will vary so you will need to check up on them. Guideplates are always a safe bet. But the power to be had with a properly selected solid roller are greater than a hydraulic roller of similar durations, lifts, and lobe seperations.

 

LPE219, they use it for up to 406cui and there are several cars in the 11's with that setup, why try something that maybe doesnt work? Go for a proven setup, LPE219...........

/N.

 

And solid rollers arent proven performers for high rpm, high power motors?

 

The LPE 219 with 383, AFR and SR are a proven combo. I'm sure there are other cams that will perform just as good and maybe better but the LPE is proven to work in just that combo. If high rpm is the goal go for a HSR or miniram and a solid roller.

/N.

 

Ski's 406cui had a solid roller 242/242 ithink and it ran pretty good, the AFR+SR likes single pattern camshaft.........

/N.

 

I never said anything about high rpms....plus with me about to start college and quit my fulltime job in a couple months i dont have money to swap out everything for a solid roller valve train. i like the looks of the 240/248@050 cam, but in the summit catalog it has it listed upto '86, and my cars an 88. I though tpi motors were the diff 85,same 86-88 or 89? ive seen a 12.17 1/4mi lpe219 setup on here before, think his name in buckeyeroc. it looks real good, but i want that little extra to get into the 11s for a 1/4.

 

2 nitrogen molcules per 1 oxygen molecule

 

fawk bottles, I hate those things. Everyone and their mother would rather spray their car fast then build it fast out here. I dont want to have to rely on a button and some gas that can blow up in an accident, or under the hood for that matter.

 

The 383,AFR,SR is a proven 11'setup, isnt buckeyeroc only a 350?

/N.

 

nah, 355. .030 over with stock size crank I believe makes a 355, 400 crank makes it a 383.

 

cant you make a 420-430hp 350 with vortec fast burn heads and a LT4 hotcam? or was that only with a carb on top?

 

Just get the LPE219. It makes more avg torque and hp than the others with the superram, and that's what you need with that heavy gta of yours. Plus with the gearing in the rear and trans, the extra torque is needed. The 219 idles good, pulls good, passes emmisions and pulls good vacuum/gas mileage.

 

You want 11's. What good is an all-powerful motor if you cant hook up worth ****. What is your suspension setup?

 

stock 1LE right now, but k-member, aftermarket shocks/struts, LCAs, SFCs, aftermarket sway bars...all the good ****. i want to end up with a pro touring T/A.

 

I have a similar setup to your actuall. I have a 383 with the super ram and my cam is an edelbrock performer rpm with an idle to 5500 range.

Duration at .006" lift: intake 278 exhaust 288

Duration at .050" lift: intake 204 exhaust 214


Lift at cam: intake .280" exhaust .295"

lift at valave: intake .420" exhaust .442"


Lobe separation: 112 Intake CL: 107




I haven't had any time to take it to the track yet, however it is one snotty unit and it sound so mean!

 

I went with the 393 TF Heads SR and 219 cam. its 10:3:1 Comp and I'm using the LS1 Injectors. I'm working out the computer bugs as we speak. I'd let you know how it runs but I only have 10 minutes on the motor