Got beat today by a M5

[brazilfree]

Originally Posted by A26B

Roger,
We (Ron Hanselman and I as Raptor, LLC and in conjunction with STS) are well along with the ZR-1 rear, twin turbo construction. Turbos are mounted, hot side is done, cold/boost side should be nearing completion. We expect to be road testing the fabricated prototype within 2 weeks. Will take appx 4 weeks after that to finish piping jigs, CNC polished SS piping, final test fitting, installation manual and system inventory. So, 6~ 8 weeks it should be ready to market. We are expecting to have it ready for the Las Vegas Gathering.

We just finished road testing on the LT1 Corvette, single rear turbo. At 8# boost, it went from 268 rwhp to 408 rwhp, a 52% increase and 264 rwtq to 437 rwtq, a 65% gain. What really matters is PUC (power under the curve). It pulls like a freight train.

The LT5, due to its stock compression of 11:1 and 4 bolt/cylinder design, will be tested by Raptor at 5# boost which is expected to result in about a 33% increase in Hp and even greater gains in Tq. Here again though, it's PUC and the increase in torque that will really show off. FWIW, I am personally aware of a TT LT5 that was dyno tested for 30 tuning runs at 8# boost with no ill effects. Point is....a stock engine may withstand more than the 5# boost we are representing as a safe level, we just can't push the envelope for marketing purposes.

Go ahead and put headers on your car as the LT5 twin turbo system requires headers anyway.

We will be posting pictures and progress reports here on the ZR-1 Net Registry Forum as it becomes available.

Any thoughts on the head gasket issues under boost for the LT5?

[A26B]

Originally Posted by brazilfree

Any thoughts on the head gasket issues under boost for the LT5?

Very short question, very long answer. Can you be more specific?

[jonszr1]

on the head gasket issue . anyone think of contacting cometic. they do custom stuff from yime to time .their stuff is very good indeed. roger you very lucky guy that area of 50 is piggy heaven

[ROGER E]

Do you have to pull the engine to install the headers?

[A26B]

Originally Posted by ROGER E

Do you have to pull the engine to install the headers?

No. Putting the new headers in is a lot easier than removing the stock system. If you have access to a lift, or a kwik lift, the job is easier.

[jonszr1]

the heat shielding is the bugger little tiny sheet mtal screws be prepared for funlittle cuts from that stuff . get the car 20in off the ground they fly in once the stk stuff is off

[Kevin]

Originally Posted by Aurora40

Geez! I hope you have 4.10's on the rear, or else that's about 160mph!

you say that like it's a bad thing

[jonszr1]

If you knew where he did it you wouldnt be saying that . the chp there will take a potatoe peeler to ya for that speed in sac area

[threestar40]

Originally Posted by Aurora40

Geez! I hope you have 4.10's on the rear, or else that's about 160mph!

That's exactly what I was thinking and not one, but count'em...two(2) idiots at that.

Come on, Roger puke it out...Give us some more dirt on this run if you're gonna act like this.

Rick

[jonszr1]

ya know its easy to say that stuff .but when your in the middle of it logic doesnt allways dictate your brain . we are all human what did someone once say .ye who is without sin cast the first stone. cut him some slack.he was justr trying to defend the KOTH honor. I,d have done the same thing.