The forged 383 rebuild I'm looking at is rated up to 800hp at the crank...

The hypertectic 383 is rated a bit less I assume...

Any opinion on either one? I know it is a very general question and at this point I can't tell you exactly which parts are used in either, but any information would be helpful...

 

I probably wouldn't be spraying any higher than a 200 shot if I were to even decide to use N2O, but I want something that will give me some good N/A power overall and that could hold 150-200 shot with no problem...

 

after seeing my hypereutectic pistons after losing a ring land, I would not spray even a 150 on them! get the forged, at least just for insurance.

 

What if I kept it N/A? Would I see some nice gains with the hypertectic?

 

if you stay NA the Hypereutectic should be fine.

 

Any gains?

 

The Hypertectic pistons will hold to close to 500 hp N/A.

Are you asking gains from going to a 350 to a 383? if so Yes. If you add a cam to complement the cubes and have the heads worked to flow more then you'll really wake up, if you just use the same heads and cam that you used on your 350 then you wont see much more than alot of torque and a lower hp peak.

 

Yes the top end will of course be built. LE heads and matching cam...

Any general hp/torque ratings with built top end with hypertectic 383 built bottom end?

 

The piston material really has no bearing on the power the motor makes, just what they will take.

David Vizzard built a race only 383 w/hyper pistons that topped 500, but for a daily I'd shoot for 450 or so.

Remember the stroker motor will eat up duration like its nothing. a wild cam on a 350 will in most cases be not as aggressive in a 383. Rod length and compression of course effect hat as well.

But get your heads worked first and then get the cam to match that, not the other way around.

 

Here's an article from Keith Black that makes an interesting case for hypereutectic pistons....

Keith Black Hyper vs. Forged

 

Interesting article, but I noticed he's just giving reasons for going with KB T6 hypereutectic pistons over the non-T6 heat treated O.E. design hypereutectic pistons. Are all hypereutectic pistons either T6 heat treated or non-T6 heat treated?

 

I've always wondered why so many people knock hypereutectic pistons...they were designed with a lot of improvements that exceeded cast pistons and are standard equiptment in most ic engnes today. Forged is great for full-race, high abuse engines, but I don't know if most people just want a "high-performance" list of goodies to show how powerful their engine [i][b]should[b][i] be or they are running their engines on the edge each and every day. I've been to the track with friends who run stock bottom ends with some balancing and blueprinting, slight head porting and exhaust cat-backs and performance cams...drive their vehicles over 1.5 hours there with full stereo systems (amps, etc.) spare tire and tools in the trunk...slap on ET Drags and spray 175hp shot with suffucient fuel and timing retard and rival trailered vehicles in et and mph all with hypereutectic pistons. One guy is a board member who is inches from the 10's...
If you control spark timing, fuel supply and don't detonate, you would be surprised what an LT1 engine can consistantly handle with hypereutectic pistons...My $.02...

 

heck, there is already an Impala SS with the stock bottom end (hypereutectic pistons) that has run 10s. Others should be hitting that level very quickly.

 

My 78 has been in the 10's with hypers on the go gas.