what pistons?
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
what pistons?
im going to bore my block to a 355 and use strong pistons.
I will keep my crank and rods.
What pistons do you recomend?
I going to run a low comp around 8,9:1. ( Going with SC later )
Thanks
I will keep my crank and rods.
What pistons do you recomend?
I going to run a low comp around 8,9:1. ( Going with SC later )
Thanks
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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Re: what pistons? (devilfish)
forged-JE, Ross, SpeedPro, etc.
just make sure theyre forged
you can pick one to keep compression where you need it
just make sure theyre forged
you can pick one to keep compression where you need it
Burning Brakes
Joined: Dec 2000
Posts: 1,023
Likes: 0
From: Marietta, South Carolina, USA
Re: what pistons? (devilfish)
It is going to be hard for you to get that compression with the heads that you have now, you will have to have pistons what are dish and with more then -20cc
If you are not going to change more then the pistons then just go with SpeedPro/TRW forged pistons.
SRP, Pro Tru and Probe are all really good pistons too.
Jay
[Modified by MrJay, 2:03 PM 9/23/2003]
If you are not going to change more then the pistons then just go with SpeedPro/TRW forged pistons.
SRP, Pro Tru and Probe are all really good pistons too.
Jay
[Modified by MrJay, 2:03 PM 9/23/2003]
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
Re: what pistons? (MrJay)
the comp im going to use isent really set yet. So any tips is very helpful...
I think my rods and crank all ballanced and tight with ARP bolts would hold up nice.
My goal is 450 hp with a lt1 intake+ my other mods in sign and a SC with water injections.
thanks
I think my rods and crank all ballanced and tight with ARP bolts would hold up nice.
My goal is 450 hp with a lt1 intake+ my other mods in sign and a SC with water injections.
thanks
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Drifting
Joined: Apr 2003
Posts: 1,292
Likes: 2
Re: what pistons? (vader86)
forged-JE, Ross, SpeedPro, etc.
just make sure theyre forged
you can pick one to keep compression where you need it
just make sure theyre forged
you can pick one to keep compression where you need it
Is it torque, comp. ratio, revs, or what?
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: what pistons? (britvette)
forged-JE, Ross, SpeedPro, etc.
just make sure theyre forged
you can pick one to keep compression where you need it
So what kills hypereutectic or standard cast pistons?
Is it torque, comp. ratio, revs, or what?
just make sure theyre forged
you can pick one to keep compression where you need it
So what kills hypereutectic or standard cast pistons?
Is it torque, comp. ratio, revs, or what?
Drifting
Joined: Apr 2003
Posts: 1,292
Likes: 2
Re: what pistons? (vvv90)
I'd say the biggest enemy is detonation.
Forged pistons are, I am sure all will agree, superior to cast.
To recommend forged (whilst undoubtedly true) reminds me of Oscar Wilde-
"I am easily satisfied - just give me the best"
But what I am wondering is at what point do you need the rattle and expense of forged, and how do you gauge that point - CR or what?
[Modified by britvette, 10:38 PM 9/23/2003]
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: what pistons? (britvette)
I'd say the biggest enemy is detonation.
I would say your right, but even forged pistons don't like much of that.
I would say your right, but even forged pistons don't like much of that.
The other weak link, however, is the cast rings.
Forged pistons are, I am sure all will agree, superior to cast. but what I am wondering is at what point do you need the rattle and expense of forged, and how do you gauge that point - CR or what?
So in short, it depends on the application. What might be good for my friends 600HP motor, isn't good for a 434 ci stroker with N2O or F/I.
Drifting
Joined: Apr 2003
Posts: 1,292
Likes: 2
Re: what pistons? (vvv90)
So in short, it depends on the application. What might be good for my friends 600HP motor, isn't good for a 434 ci stroker with N2O or F/I.
Just looking for some kind of rule of thumb :confused:
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: what pistons? (britvette)
O.k. now your question is more involved with WHICH hyper piston to go with.
I'm not familiar with the HP constraints on the stock pistons. But if you're machining a new engine you'll need new pistons and the price difference between hyper and forged is IMO marginal, but that's just me.
N/A w ~10.5-10.8:1 400HP, hyper pistons will be o.k.
The pistons my buddy got were stronger than stock pistons though. I'll see if I can find out who makes them, but the only reason he went with them, is because he couldn't get forged pistons for a Ford 347 .030 over, and the hypers were available and appropriate.
I'm not familiar with the HP constraints on the stock pistons. But if you're machining a new engine you'll need new pistons and the price difference between hyper and forged is IMO marginal, but that's just me.
N/A w ~10.5-10.8:1 400HP, hyper pistons will be o.k.
The pistons my buddy got were stronger than stock pistons though. I'll see if I can find out who makes them, but the only reason he went with them, is because he couldn't get forged pistons for a Ford 347 .030 over, and the hypers were available and appropriate.
Pro
Joined: Jan 2003
Posts: 669
Likes: 0
From: memphis tn
Re: what pistons? (devilfish)
wiseco makes forged pistons w/a 20cc dish for blower apps. i got mine from www.dirttrackthunder.com for less than $500, with moly rings, pins and double spirolocks.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
Re: what pistons? (neverendingproject)
so do you agree that the weak part in a stock engine is the pistons and the rings?
rpm kills rods and cranks, and im not taking it over 6000rpm so that would hold nice with som arp bolts.
rpm kills rods and cranks, and im not taking it over 6000rpm so that would hold nice with som arp bolts.