357 vs 393
11-30-2005, 12:40 PM
#1
6th Gear Member
Thread Starter
Join Date: Sep 2005
Location: Hamilton, NJ
Posts: 15,042
357 vs 393
I obviously know that the 393W would wreck a 357W (NO REPLACEMENT FOR DISPLACEMENT 
)BUT I was just wondering HOW much of a difference? I was going to buy a 357W from DSS racing but Ive been hearing bad things about them so I looked into CHP (Coast High Performance) and they have a really nice setup for a 393W. And its not that much more. What kind of power/ET's do you think I will be looking at with a 357W, AFR 205's, C4, Full Suspension, 3000lbs ? Ive been told 10's, Ive been told 11's. Whats your opinion?
)BUT I was just wondering HOW much of a difference? I was going to buy a 357W from DSS racing but Ive been hearing bad things about them so I looked into CHP (Coast High Performance) and they have a really nice setup for a 393W. And its not that much more. What kind of power/ET's do you think I will be looking at with a 357W, AFR 205's, C4, Full Suspension, 3000lbs ? Ive been told 10's, Ive been told 11's. Whats your opinion?
12-01-2005, 12:37 AM
#3
3rd Gear Member
Join Date: Jul 2005
Location: ma
Posts: 770
RE: 357 vs 393
i need a new crank, rods and pistons. mine can be the guinea pig if you guys help me out in picking stuff for the build. id prefer a cast crank, forged rods and hypereutectic pistons due to the cost.
i was thinking about either of the two cranks at the top (393 or 408): http://www.eaglerod.com/products/For...%20cranks.html
i wouldn't be revving it much over 6,500 since it will mainly be a street motor.
it mentions sbc rods, what kind of pistons would i have to use with it?
when i finish building it, maybe they would let me dyno it at school, even though im in autobody, but im sure i could find someone to do it there, theyve got a couple dynamometers.
on edit the chp crank looks better if the 6.125" rod they say it used is a ford size.
http://www.coasthigh.com/Crankshafts/cast_steel.htm
carl
i was thinking about either of the two cranks at the top (393 or 408): http://www.eaglerod.com/products/For...%20cranks.html
i wouldn't be revving it much over 6,500 since it will mainly be a street motor.
it mentions sbc rods, what kind of pistons would i have to use with it?
when i finish building it, maybe they would let me dyno it at school, even though im in autobody, but im sure i could find someone to do it there, theyve got a couple dynamometers.
on edit the chp crank looks better if the 6.125" rod they say it used is a ford size.
http://www.coasthigh.com/Crankshafts/cast_steel.htm
carl
12-02-2005, 06:30 PM
#4
6th Gear Member
Thread Starter
Join Date: Sep 2005
Location: Hamilton, NJ
Posts: 15,042
RE: 357 vs 393
I would highly recommend not using hypereutectic pistons. It is not much more expensive to go with forged. They may not be absolutely necessary in all applications. However, the minor additional cost of a forged piston can save your motor from disaster in a marginal situation. Here is some information that I pulled for Probe Industries Forged Pistons:
FPS Series: The Probe Factory Performance Series forged pistons are manufactured in styles resembling a factory replacement piston. They are manufactured on high silicon forgings, utilizing Probe's exclusive diamond cut skirt design, allowing very tight piston to wall clearances. Probe FPS forged pistons are about 75% stronger than cast or hypereutectic cast pistons and have greatly superior heat transfer properties. Piston weights are significantly lighter than factory pistons, making balancing your engine a necessity. FPS forged pistons use factory ring sizes and press fit wrist pins for ease of assembly.
SRS Series: Probe Sportsman Race Series forged pistons are designed for serious street and most track applications, although we find they work extremely well even in mild or stock replacement applications. SRS series pistons are manufactured from aircraft quality 2618 forgings, which provides very high strength. Probe's exclusive diamond cut skirt design allows piston to wall clearances suitable for even the mildest applications. Since Probe SRS forged pistons are substantially lighter than stock, engine balancing is an absolute requirement. SRS forged pistons use 1/16 ring sizes and full floating wrist pins.
FPS Series: The Probe Factory Performance Series forged pistons are manufactured in styles resembling a factory replacement piston. They are manufactured on high silicon forgings, utilizing Probe's exclusive diamond cut skirt design, allowing very tight piston to wall clearances. Probe FPS forged pistons are about 75% stronger than cast or hypereutectic cast pistons and have greatly superior heat transfer properties. Piston weights are significantly lighter than factory pistons, making balancing your engine a necessity. FPS forged pistons use factory ring sizes and press fit wrist pins for ease of assembly.
SRS Series: Probe Sportsman Race Series forged pistons are designed for serious street and most track applications, although we find they work extremely well even in mild or stock replacement applications. SRS series pistons are manufactured from aircraft quality 2618 forgings, which provides very high strength. Probe's exclusive diamond cut skirt design allows piston to wall clearances suitable for even the mildest applications. Since Probe SRS forged pistons are substantially lighter than stock, engine balancing is an absolute requirement. SRS forged pistons use 1/16 ring sizes and full floating wrist pins.
