im trying to decide if i want to go to a 383 while the motors down or just go back 350. what i have is accel supperram w/ slp #25 injectors, 1000 cfm accel tb, edelbrock aluminum rpm heads, upgrading to 1.6 rr from my 1.5 ( gold crane sa ). the pistons are forged flattops n w/ 64 cc should be @ 10.0 to 1( was 10.8 w/ 58 cc) on summit stage 1 rods. i have full length headers and y pipe to 3 inch exhaust. and a pro built 700r4 to a 9 bolt 3.23 disc rear. my cam that i have is based on the lt1 hotcam but has higher lift and longer duration. oh and its all run in SD tpi. i have msd 6al box msd wires accel coil and dist.
no its not a daily driver just a weekend cruiser / strip just to show out. its not my real track car like my sig says.
just wanted to know some pros/cons of doing the 383 and how much difference i will see if i do a 383.
oh if it matters its a 91 l98 block 1 pc rear main roller block. thanks guys!

 

9 bolt rears use a 3.27 gear. ...if you make a lot of power you're gonna mangle that 9 bolt.

Pros of a 383. More power. Cons? More money. If you can afford the machine work, why not go 383? You could go with some more radical parts on a 383 probably, but your combo should STILL work real well and make more power.

Can the SD run that kind of set-up? I don't know much about the SD.

 

i believe the SD should run the setup. as far as money for the project is concerned im in no hurry to put it together, i just want to do it all up front this time. last few motor builds ive done a few months or years later i was in them changing parts. thats why im trying to decided what to do with it while its apart. im guessing that all i would really need is the crank and probly bigger injectors. already having the supperram and the 1000cfm 58mm tb should flow enough air for a 383. i believe the heads i have...i know they arent the best out there... but should be just fine for what im trying to achieve w/ this vehical.
as far as the nine bolt goes i really dont think it is the strongest out there but should be better then the stock rear end. im guessing this should be b/w a 350/400 hp car.

 

another ? i have is if i change to a 383 will my compression ratio be affected? never built a stroker motor befor.

 

That combination should be fine for a 383 with a SuperRam.

If you check my info on the left you shouldn't have to ask me how I know....

 

With the price of 383 kits these days, why not?

 

vernw what compression you running and what kinda cam if you dont mind me askin. those look like some pretty good numbers.

 

I'm running 200cc ported Sportsman II (fastburn style) iron heads with 2.02/1.6 Manley valves at 10.56:1 compression. These are on an older 010 hi nickel block with a 2 piece rear main seal. It has been converted for hydraulic roller lifters.

The cam is a custom Comp Cam hyd roller with 218I and 224E duration @ .050, lifts .497"I and .502"E @ .050 with 1.5 ratio rockers. I'm running full roller rockers, 1.6 on the intake (for a .525" lift) and 1.5 on the exhaust.

Currently running LS1 28# injectors (looking at trying some SVO 30's), ported SuperRam with their lower intake manifold, SLP Tri-Y headers, dual cats, A.I.R. system intact. Fully emissions legal and tested on the emissions dyno.

Did I miss anything?

 

sounds liek a sweet setup. your would definatly along the lines of my setup. my heads arent as good as yours obviously(170cc un ported aluminum edel. perf rpm heads 2.02 1.60 stainless steel valves w/ 550 lift springs) ,but my cam is a lil more radical. we have the same exhaust system except mine has no cats and no emisiions at all since itdoesnt have to pass here im not going to make it, my superram is getting a mild port job, i was also looking at the svo 30 injectors since my slp 25's were going to probly be too small, i currently have the crane gold exct. true roller rockers that are self aligning, going to sell those n get the 1.6's of the same make.
the only other q? i really have is if @10.0 to 1 comp. is going to be enough w/ the aluminum heads or if i need to get a lil higher. @ 10.5 to 1 is what im thinking, the car might occasionally at the track only get a lil juice shot but im kinda sterring against it seeing as it isnt my only strip car in the works.
like i said the pistons i had w/ a 58cc head got me right at 10.8 to 1 so going to a 64 cc head it should be 10.0 to 1 or in that area.

 

If there's any chance of juicing it at all, you need to stay away from the 10+ compression from what I've been told....

Otherwise, with aluminum heads 10-10.5 should be no problem.