Alot of KB and whipple cars melting pistons.

[betiwin]

Man I keep reading on Modfords and svtperf. of guys with whipples and KB's melting #2,7,8 pistons. Most of these guys had safe tunes but I really think pushing this 19-21lbs of boost is too much for the stock pistons. Not to say a lightly modded cobra can’t have problems but it just seems like these guys are pushing the envelope of these monsters when it comes to the pistons. I quess the good news on most teardowns they only find damage to the top of some pistons and say the rods, bearings, crank, block all seem super strong. I quess if you plan a bigger blower CP pistons might be a good investment at the same time.

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[Flatliner]

What the cost?

 

[hj16]

I persoanlly wouldnt consider going over 17psi with these motors. So run it higher, and get away with it....others dont though. Its a gamble when going above 500hp with these cars.

 

[Nichepi]

The 99-04 Cranks have always been one of the most exceptional internal parts of our engines. (Just not the rest of the internal parts of the 99-01) The 03/04 motors while being moved back to a cast block had some nice eagle rods but kept the stock crappy pistons.
A nice JE or CP would be a recommendation in cases of most of these modifier’s whom are going boost crazy.

 

[Flyn]

I persoanlly wouldnt consider going over 17psi with these motors. Some run it higher, and get away with it....others dont though. Its a gamble when going above 500hp with these cars.

I agree. 500hp is where I would eventually like to be. That's more than enough power for a daily driver. If your car is a toy or dragstrip ride, then go balls out and pay as you go for better parts or repairs.

 

[GRNENVY]

Bad news

There are to big problems with these guys running high boost. When running over 16psi you need OCTANE and all these guys think they can get away with high test (93). Even with bigger injectors and better pumps it's dangerous. The other problem is heat soak and engine temperature. You can not continously run then these car hot and think you will run pump gas. You will see more broken motors this summer.

 

[tim lester]

I thought the 03 has manley h-beam rods with forged piston maybe not a brand name piston but better then the hyper. pistons on the 99 01 cobra.

Tim

 

[wtw5974]

Your correct. :biggthump

I thought the 03 has manley h-beam rods with forged piston maybe not a brand name piston but better then the hyper. pistons on the 99 01 cobra.

Tim