What type of gains should i expect from my 383 stroker kit. I mean typically what type of numbers do these usually put down. I have only a couple of toher mods and they are in sig. Let me know what i should look for. extra 50? maybe 100? Also tpyically what type of times and traps speeds do they ususally put down with the 383. Thanks Cory

 

If you just put a 3.75" stroker under stock heads and cam, and don't change anything else (e.g. - compression ratio) you will not see much of anything. You are only picking up less than 10% extra cubic inches, and causing the stock heads and cam to work harder than they are with only 350 cubes. The HP is made with the heads and the cam, not with the displacement. 10% extra on what you have now is maybe 30HP.

 

Well, you can expect an increase in torque from the added stroke, an increase of power from increased displacement, and an increase of power from the higher compression caused by the increased displacement.
How much though? Well, I don't know much about Chevy engines... but I'd guess around 30-40hp atleast. Plus a good amount of torque.

 

As FRed said, there would really be a negligible gain if the only change was a stroker rotating assembly. There would be some more torque and a bit more hp, but on the whole it would be far better to put money into the top end of the motor (heads, cam, and intake) and into the exhaust system than into a stroker. The only exception would be if you need to rebuild the bottom end anyway.

Rich

 

How can you say that?!?! Have you never heard the age old saying "there's no replacement for displacement " ???

I had a "mildly" built 383 stroker in my '81 Z28 --- "mild" in comparison to the 350 we have in my Dad's '73 Camaro now --- and yet it ran comparibly to the '73 IMO, and that was a long stroke with an otherwise "cheap" heads/cam setup, yet it still made good power.

I'm not arguing the fact that heads & cam are what make the most out of an engine though.

 

The reason im putting in the 383 stroker is that i blew a head gasket and due to that i spun two bearings scored the crank really bad and bent two rods. So yeah thats why im putting this stroker in, I wouldl ike to put in heads but idont wanna spend another grand. What are some decent heads for good prices. Thanks Cory

 

Believe whatever you want. If he puts a 3.75" crank in an otherwise "stock" engine, he isn't going to get the 50 to 100HP increase that he is looking for.

 

We can ballpark numbers all day long. You'll never truly know until the job's done. Don't set yourself up for failure/disappointment EXPECTING a certain number out of the motor/parts you bought. Personally, I'd take what I have, put it together, see what it makes and go from there.

 

I think while im at it im gonna go ahead and throw in a cam. I really just dont wanna mess with the heads right now. I gonna call Comp Cam and see what they reccomend for me, Thanks Fellas Cory

 

Yah, that's a good idea actually. You're gonna have the engine apart anyway, might aswell through in a better cam!