383 Question
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383 Question I am looking into doing a 383 in the near future. Compression will be around 11.4-11.5. I will be using my PRC 5.3 stage 2.5 heads and MS3 cam with this set up. I am also adding a Fast 92. Do you think I will be close to 500 RWHP and 460 RWTQ? Should I go with a bigger cam? Car is a street car that hits the track in the winter. Also will be putting a 200-250 through a Nitrous Dave's plate until I can get a stand alone and direct port set up. Thanks for any replies.
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From: Vegas
I agree brandon. After our conversation the other day, I would say that you should go with a 402 or 408. If you are already spending a few thousand on a new block, might as well take the next step completely and make sure you are well into the 500's.
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Ok got a ? to add if I build a 383 aluminum block and it made say 460-500 hp and I built a 402-408 iron block and it made 500-540 hp. Do u really think the 402 car would be that much faster . Yes I know the torque would be different but the 80-100lbs weight difference seems like it would make up the hp/tq difference . Like I said its a ? not an opion
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Then why did you build a ls2 ? That kinda contradicted your statement above . I know the iron block will be durable but if u making 500-550 rwhp durability does not come into play imo .
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Not at all. Re Read the question above my comment. He asksed 383 aluminum vs 408 iron. 402 aluminum wasn't a choice. If it was, I would've picked ls2 402. I also believe the poster was referring to using an ls1 aluminum block with a 4 inch crank to make his 383. Aluminum LS2 block strength is greater then the aluminum ls1. I hope that clears up your misunderstanding. 
I am looking into doing a 383 in the near future. Compression will be around 11.4-11.5. I will be using my PRC 5.3 stage 2.5 heads and MS3 cam with this set up. I am also adding a Fast 92. Do you think I will be close to 500 RWHP and 460 RWTQ? Should I go with a bigger cam? Car is a street car that hits the track in the winter. Also will be putting a 200-250 through a Nitrous Dave's plate until I can get a stand alone and direct port set up. Thanks for any replies.
My compression is right at 11.4!
See my sig/web link for the details of my setup.
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Thanks - I love this car of mine!
It's streetable,
Just loud enough to get attention,
a head turner,
...oh yeah, and Fast!
It's not a sleeper, but people just dont realize what it can do.
...very few that pull up next to me wins (or even tries)....very few.
It's streetable,
Just loud enough to get attention,
a head turner,
...oh yeah, and Fast!
It's not a sleeper, but people just dont realize what it can do.
...very few that pull up next to me wins (or even tries)....very few.
I think u will be close. I would go with a custom grind. Hopefully I can hit over 500rwhp. My set up is a
383 ls1 forged bottom end.
12.56 to 1 compression
Good ported 806s.
Victor jr with 4 barrel tb.
Ms4 cam with 112lsa.
I also plan to shoot a 300shot in it. It should make my impala move!!!
383 ls1 forged bottom end.
12.56 to 1 compression
Good ported 806s.
Victor jr with 4 barrel tb.
Ms4 cam with 112lsa.
I also plan to shoot a 300shot in it. It should make my impala move!!!
Is there any idle videos of your car ?
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From: Was New Orleans, but swam to Baton Rouge
https://ls1tech.com/forums/dynamomet...t-results.html
Sounds like you want to do what I did. Here is my setup if you care to look at some numbers.
Sounds like you want to do what I did. Here is my setup if you care to look at some numbers.