gain from forged pistons?

stang9gt · Aug 17, 2004

I have an engine rebuild class, what kind of power will I be able to run if I put forged pistons, and arp main bolts in the motor??

Mike

millatime · Aug 17, 2004

stang9gt said:
I have an engine rebuild class, what kind of power will I be able to run if I put forged pistons, and arp main bolts in the motor??

Mike

don't forget the connecting rods

stang9gt · Aug 17, 2004

I'd like to make about 420rwhp and would like to not spend 500$ on connecting rods if possible....

millatime · Aug 17, 2004

why not spend the money you planned to spend on the pistons on the connecting rods then? How many people have you heard about cracking pistons as compared to loosing an engine due to connecting rod failure?

stang9gt · Aug 17, 2004

How would a set of 2001 cobra rods do with some forged pistons...I have a set and thought of using those....

tontot77 · Aug 17, 2004

you are insane if you don't put the forged rods in there if you are going to take the time to do the pistons... but umm, whatever... I guess you could get higher compression pistons and bump up the hp...

FallenPhoenix · Aug 17, 2004

I believe that the '01 Cobra rods were the same as the GT rods. '03-'04 rods would be good but you could still do better. I believe the '03-'04 rods are aftermarket but knowing Ford I'm sure they cut corners to save $.50 an engine.

Also, you probably won't gain any power at all from just the rods/pistons, you may even lose power depending on if their forged and what material they're made out of.

bdcardinal · Aug 17, 2004

you will not gain power from changing to forged rods/pistons alone. however they will allow you to safely make more power. if you put in dish pistons and do not supercharge the motor then you will lose a substantial amount of power because of the loss in compression. the stock 03/04 cobra rods are very good. they are Manley H-Beam rids with ARP fasteners. i jsut dynod a buddies 04 mysitchrome and he made 581rwhp with the belt slipping pushing 21lbs of boost on the KB without taking off the valve covers.

Dan_Soprano · Aug 17, 2004

FallenPhoenix said:
I believe that the '01 Cobra rods were the same as the GT rods. '03-'04 rods would be good but you could still do better. I believe the '03-'04 rods are aftermarket but knowing Ford I'm sure they cut corners to save $.50 an engine.

No, SVT used Manley H-beam rods and Manley dish pistons for the 03/04 Cobra motor. There are pleople making close to 1000 HP at the crank on a New cobra motor with no problems at all. The 03/04 Cobra motor is the best motor Ford has built IMO.

FallenPhoenix · Aug 17, 2004

Dan_Soprano said:
No, SVT used Manley H-beam rods and Manley dish pistons for the 03/04 Cobra motor. There are pleople making close to 1000 HP at the crank on a New cobra motor with no problems at all. The 03/04 Cobra motor is the best motor Ford has built IMO.

I stand corrected

ProCharger GT · Aug 17, 2004

if you dont do rods then there is no point in beefing up anything else. for a solid build just get forged H beam rods from manley. if staying NA, you can get domed pistons to raise the compression a little. if you want to run boost, get dished pistons, make the compression ratio 8.5:1 and you can make some excellent boost.

Canuck Stang · Aug 17, 2004

In MM&FF, they had an article which explained for every point of compression gained/lost you gain/lose 4% HP....

nickthegenius · Aug 17, 2004

bdcardinal said:
you will not gain power from changing to forged rods/pistons alone. however they will allow you to safely make more power. if you put in dish pistons and do not supercharge the motor then you will lose a substantial amount of power because of the loss in compression.

Our stock pistons are dished on the '99-up cars. Otherwise, +1.

hotforstangs · Aug 17, 2004

If you are gonna have the engine out, you had better do both the rods and the pistons, Im sorry you dont want to spend $400 to $800 for a set of rods, but it would kind of suck if you spent all that money in balancing the crank to the new pistons, new bearings, gaskets, labor etc.... and you threw one of the stock powdered rods, you would be at square one again, Do it right the first time or dont do it at all. If you dont have enough money to do it now, wait and save. Horsepower is cheap.... reliability is expensive....

gain from forged pistons?

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