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'95 T-78 RX-7 vx. '96 Venom 500 Viper GTS

Old Oct 30, 2002 | 10:50 AM
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'95 T-78 RX-7 vx. '96 Venom 500 Viper GTS

What do you think the outcome would be between these two cars?

The RX-7 puts down 440 rwhp @ 17 psi. The Viper has ran a best of 7.2x @ 93 mph in the 1/8 mile. I don't have a time on the RX-7. We will be going from a 20-40 mph roll. The 7 will be on BFG drag radials and the Viper will be on road race slicks. The Viper has intake, headers, exhaust and gear (3.55).

Who will win?
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Old Oct 30, 2002 | 11:15 AM
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Just a heads up, I copied this from the kills section rules thread :

- All threads that ask about an outcome of a race such as "FD vs. Supra" that actually didn't happen are to be placed in that generations specific section if it involves an RX-7, all other "vs." threads that don't involve an RX-7 (and ask about the outcome of a race) should be in the General Automotive section. The kills section is just for kill stories, not for performance questions.

Also, I think that you will probably pull on the Viper. You're pobably making slightly more HP, and are lighter, but he has the major torque advantage and the gears.
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Old Oct 30, 2002 | 12:07 PM
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doh!!!
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Old Oct 30, 2002 | 02:48 PM
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Question

What speed are you racing to? Straight line?
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Old Oct 30, 2002 | 02:59 PM
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Straight line and will go until it's evident someone lost!
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Old Oct 30, 2002 | 03:04 PM
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Should be a good race. The Viper should pull off the line...but that T78 will catch up in a hurry once it reaches the boost curve.
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Old Oct 30, 2002 | 04:38 PM
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"Straight line and will go until it's evident someone lost!"

I'm glad you cleared that up, at first i thought you meant you'd race from 20-40. bleh! boring!! i hope you win.
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Old Oct 30, 2002 | 05:44 PM
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Hey man,
You should be doing an easy 95+ through the 1/8 mi. My guess is that you get him by a couple of cars.
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Old Nov 1, 2002 | 09:57 AM
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Originally posted by Rxmfn7
Also, I think that you will probably pull on the Viper. You're pobably making slightly more HP, and are lighter, but he has the major torque advantage and the gears.
A venom viper with intake/exhaust doesn't make more than 440hp? I sure hope they do, but maybe not with the 96 ones. I don't know too much about vipers though.
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Old Nov 1, 2002 | 10:08 AM
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Damn, I clicked on this thread thinking I was going to be reading about a race between these two cars! I was all like, "Wow, this has GOT to be a good read".

And it just turns out to be a hypothetical "what if"?


THANKS A LOT!!!
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Old Nov 1, 2002 | 10:14 AM
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M.Piedlourde

Check back in a couple of days, there will be a video.
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Old Nov 1, 2002 | 10:26 AM
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Re: M.Piedlourde

Originally posted by Roy Johnson Jr
Check back in a couple of days, there will be a video.
Roy... just be sure to brake boost... when you guys go you should be at 15 psi or more!

If you don't he'll jump on you quicker than you would ever believe.

I'd recommend starting from 40 mph or more... at 20 you guys are just going to be roasting your tires.

Can't wait to see the vid.
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Old Nov 1, 2002 | 10:36 AM
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Re: Re: M.Piedlourde

Originally posted by Jim Swantko


Roy... just be sure to brake boost... when you guys go you should be at 15 psi or more!

If you don't he'll jump on you quicker than you would ever believe.

I'd recommend starting from 40 mph or more... at 20 you guys are just going to be roasting your tires.

Can't wait to see the vid.
Sounds like you've got a bit of experience with this particular subject
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Old Nov 1, 2002 | 10:42 AM
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Re: Re: Re: M.Piedlourde

Originally posted by GoodfellaFD3S


Sounds like you've got a bit of experience with this particular subject
Yep... turbo cars need boost... unless you brake boost you'll just sit there helplessly as the N/A car walks away while you're building boost. I learned that it's a helluva lot easier (and fun) to brake boost than it is to play catch-up.

On the highway I've brake boosted to 23 psi... it's fun to smoke your tires at 55 mph! haha
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Old Nov 1, 2002 | 10:44 AM
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How do you brake boost while you're rolling?
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Old Nov 1, 2002 | 11:01 AM
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You hold the brake down a bit, and give it some throttle... the extra resistance allows the car to build more boost than you'd normally have at that speed, in that gear.

Its easier said than done tho... takes some practice. A friend of mine had a device on his supra that did it for him, i can't remember how.
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Old Nov 1, 2002 | 11:11 AM
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Originally posted by ptrhahn
You hold the brake down a bit, and give it some throttle... the extra resistance allows the car to build more boost than you'd normally have at that speed, in that gear.

Its easier said than done tho... takes some practice. A friend of mine had a device on his supra that did it for him, i can't remember how.
You're thinking about the 2-step which build boost at a dead stop with a 6-speed.

To brake boost from a roll... simply push the brake pedal down while applying throttle... use the brake to control your speed and as your engine is pushing against the brake it will build boost. When you guys go simply let off the brake and boom... you're gone!

I'd try it a few times... be sure to give it plenty of throttle 75% or more throttle. Watch your boost gauge climb then release the brake... one helluva feeling!
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Old Nov 3, 2002 | 09:57 AM
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Originally posted by Ryde _Or_Die


A venom viper with intake/exhaust doesn't make more than 440hp? I sure hope they do, but maybe not with the 96 ones. I don't know too much about vipers though.
Well he said that his car made 440RWHP. Say with a 15% drivetrain loss that is about 506HP at the flywheel. A Viper GTS has 450HP at the crank stock, with intake/exhaust he is probably close to 500, not sure how Vipers take to mods though, it may be more.
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Old Nov 3, 2002 | 10:13 AM
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You said VEnom right? Isnt that the 800 something horsepower Henessy Package? If it is, then your in for one hell of a ride. Good luck!
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Old Nov 3, 2002 | 10:47 AM
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Venom is Henessy's viper packages, but they come in many forms. What your thinking of is the Venom 800, which makes 800HP with the help of twin-turbos. Theres is a Venom 600, and then just I suppose a 500 which is just I/E mods..
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Old Nov 3, 2002 | 01:44 PM
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So when's the race.. I want to hear about it...
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Old Nov 3, 2002 | 02:28 PM
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Should you only be brake boosting with an upgraded ECU or is it still unsafe with an upgraded one? Or will this one boost increase not lean your engine that much.
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Old Nov 3, 2002 | 03:25 PM
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THE RESULTS

This is a post by the owner of the Viper. I'm quoting it because I don't feel like typing all of it. I was at 17 psi on BFGs. Viper was on road race slicks with the Venom 500 package going from a 40 mph roll:

First race: When we let out the Viper was two cars ahead and it was obvious things weren't going to change much if it continued. Viper was still in forth gear. I believe Roy thinks the Viper left a little soon. We didn't discuss this part but I think: Roy started to jump early and then had to hesitate to be fair and it cost him. Another words I think the Viper was on time at go and the little bobble at the start cost Roy some time and maybe some boost. Roy thinks the Viper got a little jump on that one. When I say he started to jump early.....it was just one of those things....you gotta be ready, it wasn't a cheat jump or he would have not done the double take, he would have kept going. Hard to tell but that start could have been better. The second run I think Roy got the jump but not because he went early, maybe the Viper slept. Whatever, the rx7 was almost...maybe a whole car ahead very quickly. It stayed like that through second and third, then in forth and the very beginning of fifth the Viper had pulled back up to the back of the rx7's front fender and was still pulling when Roy let out. I really wish it had gone farther because before fifth was done the Viper would have pulled ahead.
In Roy's defense it was a location he was not used to and the protection of the guard rail/wall had past by and there was traffic to the left of the painted area at the end of the wall. I would have stayed in it if I had been in his lane but I know the traffic flow much better at that spot. Roy will give his take but this is pretty close. Both were from a 40 roll.
I hesitantly agreed to one win for the rx7 and one win for the Viper, but I did agree. Boils down to: Both cars are fast and damn close. A totally stock Viper would get spanked by at least three cars. A totally stock rx7 would get spanked by....never mind
We were going to do round three, we exited this road and at the end of the exit ramp there was a stop light and when turning left to cross the overpass to re enter some old man in a 95ish firebird runs the red light and side swipes the Viper in front of the rear tire on the quarter and door. Finally got him to pull over and it looks like there are no dents or dings, only whiteish looking scrapes and residue. Some of it rubbed off with spit and thumb. I believe they will all buff out without going to primer. Close call !!!
I guess now we'll have to let him put on some NOS and I'll install my 3 bar map sensor!

It was a cool run and the Viper runs strong. I was proud of 'lil 'ol red! It impressed a lot of people.
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Old Nov 3, 2002 | 04:02 PM
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good run!!!
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Old Nov 3, 2002 | 04:12 PM
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i wanna see this race
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