Piston choices
Thread Starter
Drifting
Joined: Jul 2000
Posts: 1,266
Likes: 0
From: Allen, TX, USA
Piston choices
I've been looking at pistons for a street/strip motor.
I'm targeting a motor at about 380HP, trying for 300RWHP.
I'm only looking at the hypereutectic pistons - flat tops.
I've found that Keith Black sells two for a 350/355 - KB120 and
KB231. The '231s are supposedly lightweight - 485 g vs 535g.
The silvolite claimers are also about the same price as the KB's.
Also, Speedpro sells '345 - a cheap rebuild type, and the '631 a
coated skirt hyper.
Of these I want a set with only 2 valve reliefs - that rules out the 345's.
Any other things to consider between the Speedpro's and the KBs?
Is the lighter weight KB's worth the $60 difference?
Anything else to consider about pistons?
Thanks.
I'm targeting a motor at about 380HP, trying for 300RWHP.
I'm only looking at the hypereutectic pistons - flat tops.
I've found that Keith Black sells two for a 350/355 - KB120 and
KB231. The '231s are supposedly lightweight - 485 g vs 535g.
The silvolite claimers are also about the same price as the KB's.
Also, Speedpro sells '345 - a cheap rebuild type, and the '631 a
coated skirt hyper.
Of these I want a set with only 2 valve reliefs - that rules out the 345's.
Any other things to consider between the Speedpro's and the KBs?
Is the lighter weight KB's worth the $60 difference?
Anything else to consider about pistons?
Thanks.
Safety Car
Joined: Apr 1999
Posts: 4,623
Likes: 2
From: Ohio
Originally Posted by adam
I've been looking at pistons for a street/strip motor.
I'm targeting a motor at about 380HP, trying for 300RWHP.
I'm only looking at the hypereutectic pistons - flat tops.
I've found that Keith Black sells two for a 350/355 - KB120 and
KB231. The '231s are supposedly lightweight - 485 g vs 535g.
The silvolite claimers are also about the same price as the KB's.
Also, Speedpro sells '345 - a cheap rebuild type, and the '631 a
coated skirt hyper.
Of these I want a set with only 2 valve reliefs - that rules out the 345's.
Any other things to consider between the Speedpro's and the KBs?
Is the lighter weight KB's worth the $60 difference?
Anything else to consider about pistons?
Thanks.
I'm targeting a motor at about 380HP, trying for 300RWHP.
I'm only looking at the hypereutectic pistons - flat tops.
I've found that Keith Black sells two for a 350/355 - KB120 and
KB231. The '231s are supposedly lightweight - 485 g vs 535g.
The silvolite claimers are also about the same price as the KB's.
Also, Speedpro sells '345 - a cheap rebuild type, and the '631 a
coated skirt hyper.
Of these I want a set with only 2 valve reliefs - that rules out the 345's.
Any other things to consider between the Speedpro's and the KBs?
Is the lighter weight KB's worth the $60 difference?
Anything else to consider about pistons?
Thanks.
Thread Starter
Drifting
Joined: Jul 2000
Posts: 1,266
Likes: 0
From: Allen, TX, USA
Guess most here use forged pistons...
> get the lightest...
Well, comparing the lightweight KB to the coated speed-pro piston,
the KB (231) would be 1080g's lighter. (587g KB vs 722g SP - I estimated
that the SP is 582g and the pin is 140g, I couldn't find the weight of the
coated piston, only an uncoated version, nor the actual pin weight.)
It appears that the lightweight KB piston includes a lightweight pin
that weighs 102g vs. 140g for a standard KB piston.
Does anyone know the weight of a speedpro hyper piston (H631CP) ?
The company web site doesn't list weights...
> get the lightest...
Well, comparing the lightweight KB to the coated speed-pro piston,
the KB (231) would be 1080g's lighter. (587g KB vs 722g SP - I estimated
that the SP is 582g and the pin is 140g, I couldn't find the weight of the
coated piston, only an uncoated version, nor the actual pin weight.)
It appears that the lightweight KB piston includes a lightweight pin
that weighs 102g vs. 140g for a standard KB piston.
Does anyone know the weight of a speedpro hyper piston (H631CP) ?
The company web site doesn't list weights...
