LimeStang05

Alright guys, before you call B.S. on me, listen to my thinking on this. I was traveling down a stretch of semi-flat 4-lane highway when an old 300zx started up on me and blew by. I was running about 80 and, not to be outdone, I shifted down into 3rd and ran it up to just over 100 and shifted into 4th. Now, the speedo only goes to 145..which I burried before shifting into 5th. Keep in mind that I dont have a top end governor with my Xcal2 (tuned by Brenspeed). By this time the 300zx was nothing but a blur in the rear view. I ran it up to 5k on the tach before letting off. On the way back into reality.....down about 85mph, I was running 2500rpms. Theoretically, twice that rpm would equate to twice that speed(85 twice is 170). Follow me? With a manual tranny, there is no room for slipping. Try it yourself. 40mph@1200rpm..85mph@2500..125mph@3700 and at 5000rpm it should be around 165-170 mph.....OK, start the criticism.

SkiBallz

I won't supply any criticism,but just say..............uhhhhh well done on your mathematical calculations.

Dan04COBRA

Did you account for HP & torque dropping too? Factor in your rear gears? 5th gear ratio?

LIVNBIG

Good point..Top Speed on the 05 GT WITH the govenor is 150mph...it is quite possible to push it up higher when removed I'm sure!

A lot of folks have been talking about hood shake at speed, did you notice any???

I have never taken my car past 100mph, I have not seen any hood shake at that speed. Just curious, Thanks

droopynleona

115 mph and no shaky, havent wanted to push it past that though, love her too much so far.

SilverR1_04

u so crazy

1fast05GT

What does the HP & torque dropping has to do with it? I'm not saying that he did reached 170 or not but IMO the HP and torque drop doesn't have any effect on achieving 170 MPH, just on how quick will it get there. Obviously if his RPMs are around 5K, that's pretty close to max HP for a stock '05 GT. Once the HP starts dropping if not governed the vehicle should keep accelerating but not as quick. The rear and 5th gear ratio all they will affect is limiting the RPMs, and he said his RPMs where 5K, still plenty of room left before grenading his 3V.

sdmahr

If you plot the speed vs RPM on a graph you can interpret what the speed would be at 5K. I say he was close. Nice run dude !

LimeStang05

On my car the hood shake starts about 130mph. It doesn't seem to be as bad with the scoop on the car. I don't know why though, because the hood does not have a hole cut in it. Its held on with 3M double sided tape...(good stuff huh?)

JSP2005

It's a lot more complicated that the correlations to RPM and speed. The biggest thing to think at higher speeds is drag. I've read several places that the '05 is drag limited to 150 mph.