Got beat today by a M5 - Page 2 - ZR-1 Net Registry Forums

brazilfree · 08-01-2007

Quote:

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 · 08-01-2007

Quote:

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 · 08-02-2007

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 · 08-02-2007

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

A26B · 08-02-2007

Quote:

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 · 08-02-2007

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 · 08-02-2007

Quote:

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 · 08-02-2007

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 · 08-03-2007

Quote:

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 · 08-04-2007

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.

08-02-2007	#13
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Got beat today by a M5 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

08-02-2007	#14
ROGER E Join Date: Apr 2004 Location: Folsom Posts: 23	Re: Got beat today by a M5 Do you have to pull the engine to install the headers?

08-02-2007	#16
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Got beat today by a M5 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

08-02-2007	#18
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Got beat today by a M5 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

08-04-2007	#20
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Got beat today by a M5 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.