HYPER EUTECTIC PISTONS RECOMMENDATION
#1
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Car: Z-28
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HYPER EUTECTIC PISTONS RECOMMENDATION
Hi to all,
I have a roller Gen 1 350 .030 SB. with Cast Crank and Rods. I am using Trickflow twisted wedge heads, GM ZZ3 Roller cam 208/221, lb 112.
Looking for some 350+ HP out of this engine. I am looking to replace my pistons with some Hypereutectic ones.
There are several brands on the market. But KB and Speedpro seem to stand out.
I will not be running any NOS nor Boost not the engine.
Looking forwards to some comments.
thanks!
I have a roller Gen 1 350 .030 SB. with Cast Crank and Rods. I am using Trickflow twisted wedge heads, GM ZZ3 Roller cam 208/221, lb 112.
Looking for some 350+ HP out of this engine. I am looking to replace my pistons with some Hypereutectic ones.
There are several brands on the market. But KB and Speedpro seem to stand out.
I will not be running any NOS nor Boost not the engine.
Looking forwards to some comments.
thanks!
#2
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Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: HYPER EUTECTIC PISTONS RECOMMENDATION
Hi to all,
I have a roller Gen 1 350 .030 SB. with Cast Crank and Rods. I am using Trickflow twisted wedge heads, GM ZZ3 Roller cam 208/221, lb 112.
Looking for some 350+ HP out of this engine. I am looking to replace my pistons with some Hypereutectic ones.
There are several brands on the market. But KB and Speedpro seem to stand out.
I will not be running any NOS nor Boost not the engine.
Looking forwards to some comments.
thanks!
I have a roller Gen 1 350 .030 SB. with Cast Crank and Rods. I am using Trickflow twisted wedge heads, GM ZZ3 Roller cam 208/221, lb 112.
Looking for some 350+ HP out of this engine. I am looking to replace my pistons with some Hypereutectic ones.
There are several brands on the market. But KB and Speedpro seem to stand out.
I will not be running any NOS nor Boost not the engine.
Looking forwards to some comments.
thanks!
#3
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Car: Z-28
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
HI, thanks for your comment. i have done some web research and the opinion on the KB is either love or hate... which I don't see with SpeedPro... I want something reliable. any more thoughts?
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
well, KB has a rep that cant be beat. on the other hand, speed pro is very good too. I have used both and always have gotten good results from both.
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
and there you have your answer, I prefer KB because of their being closer at "0" deck than speed pro. however, speed pro cant be counted out either. basically, you need not consider any others but these two choices.
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#8
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
correct blue printing of the block is a "end all , be all " kinda thing. if your piston is down in the hole any at TDC you give away compression. the idea is to have the top of the piston flush with the block at TDC. I cannot overstate the importance of balancing and blueprinting. these two things are the difference between a well running engine and a grenade
#9
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Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: HYPER EUTECTIC PISTONS RECOMMENDATION
I'm not a fan of speed pros. I rebuilt my 383 last spring and the keepers were being pushed out of the piston. Had too tap all the wrist pins out with a hammer. Soft metal from a made in India piston.
#11
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
correct blue printing of the block is a "end all , be all " kinda thing. if your piston is down in the hole any at TDC you give away compression. the idea is to have the top of the piston flush with the block at TDC. I cannot overstate the importance of balancing and blueprinting. these two things are the difference between a well running engine and a grenade
#12
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Car: 86 T/A - 70 Z28/RS
Engine: Broke - 350
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
Our 388 motor had Keith Black pistons in it and we raced using those pistons for 8 years.
#13
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
it is sometimes hard to find a honest ,knowledgeable engine builder. those of us who care to build for longevity. always ask the owner a bazillion questions before the first bolt gets turned
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: HYPER EUTECTIC PISTONS RECOMMENDATION
Some very late 92 TPI motors got the LT1 hypereutectic pistons, they are lighter but don't spark knock them much or you'll have a oil pan full of pistons..
LT1s and the LS motors run them with great success (for a stock piston)
LT1s and the LS motors run them with great success (for a stock piston)
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Car: 1984 TA - 17k orig miles
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
I've run both and would run either one again - even sprayed 150 shot on a set of speed pro's after running it in a circle track engine for almost 3 seasons turning 65-6700 rpm. Ran a set of KB's in a 377 turning 7800 for 2 seasons with no problems too.
If you go speed pro there are 2 pistons = the H345's which have a 1.548 pin height and a H273 that has a 1.605 pin height
If you go speed pro there are 2 pistons = the H345's which have a 1.548 pin height and a H273 that has a 1.605 pin height
#16
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Re: HYPER EUTECTIC PISTONS RECOMMENDATION
Thanks to all for the replies.. I have never imagined there is that much involve in pistons... I am looking for a reliable engine.. My engine block had some flat badger B557 pistons and I just basically want to replace them with some hyper eutectic pistons. I need a part number that matches those badger B557 pistons. Any thoughs?
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