LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

383 or 396

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Old Jun 18, 2003 | 12:03 AM
  #16  
RCF925's Avatar
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Joe94Z, I just bored mine .040 over and did a 385 stroker. Boring alone won't get you there you also need the 383 rotating assembly.
Old Jun 18, 2003 | 09:35 AM
  #17  
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From: Lawrence, KS, USA
Originally posted by always2fast4u
thats pretty much what i have heard from other people. i heard that the 383s rev so much better than the 396s, but 396s have a little more torque.

john
Please tell me where you heard this, as I am considering a low-compression 396 LT4 setup. I plan on turbocharging the motor, and you mentioned that 383's supposedly rev better. If this is true I may consider a 383 for my turbocharged application rather than a 396, but I want more info before I'm convinced...
Old Jun 18, 2003 | 12:15 PM
  #18  
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I have heard this by looking at other people's discussions here, and talking to a few guys i know. i didnt even think about it, but i guess it would make sense. 383 is smaller, so it can go quicker. thats why a 327 can make 450hp at the top but has little torque. thats the way it was explained to me. and most people who have put in their .02 have told me that 383 is the way to go. about the only exceptions are the 396 guys. SkarodoM is the only one to tell me 355 so far.
Old Jun 18, 2003 | 08:07 PM
  #19  
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Ai
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It depends entirely on what you are trying to do with the car. If you're trying to make max power where the cylinder head is going to restrict you more than anything, I personally wouldn't build a stroker. I don't care about tq/hp at 2500rpm.. or 3500 really, because if I'm racing, I'm not losing enough rpm between shifts for that to matter. You have at least 7k to play with taking into consideration stock PCM limitations and the fact that most guys run hydraulics, so why not use it. ;)

Still, it just depends. Most people like how strokers feel i guess, torquey. I like how my R6 feels with it's 8000-15,500rpm powerband.. fast :D
Old Jun 18, 2003 | 09:49 PM
  #20  
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From: Tx
Without a real goal, there is no sense in discussing it.

A 350 with the right parts should be good for 425-450 rwhp before 7k.
Granted, you can make the same power with a 383/396 but Phil is correct... you will need enough cylinder head to get there.

As far as comparing the 383 to the 396. A comparison of output between the two is miniscule at best. All things equal, your butt-meter would never know the difference between the two. I'd just build the 383 and get on with other things.

Take care
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