Possible purchase of supercharged 1997 Viper GTS

[Sn95Snake]

Hello Everyone,

Well I went to check out a 1997 Viper GTS with a ROE Supercharger on Saturday. During the test drive in mid second gear while flooring it the car backfired and the aftermarket air to fuel ratio gauge was reading at 16+ and would peg at 24 and stop working. So needless to say I am sure the AFR gauge is not working correctly. To be 100% honest I expected this thing to be much faster, it didn't feel much faster then my 04 pullied Cobra does.

We put it on a lift and checked it out and the car is very clean underneath, inside, & out besides a couple paint bubbles on the hood (The hood & front bumper have been repainted due to them getting scratched when loaded on to a trailer.

I am having the shop take it to RET (Racers Edge Tuning) today to have the car put on a dyno & have the AFR checked out to ensure everything checks out.

Mods: ROE 2.8 Supercharger, 1.7 Roller Rockers, Full catted exhaust, water/meth injection, upgraded fuel system.


Does anyone have any suggestions on what to look for?


Update here is a video of the Viper being pulled out after the Dyno, didn't get a video of the dyno.

Well I just had it checked out and put on a dyno, the Supercharger is done. Not putting out any boost and it dynod at 488.44 rwhp & 558rwtq on the first run and 469.93rwhp & 562.96 rwtq on the second run. which explains why is doesn't feel faster then the Cobra.

Glad I didn't buy it before getting it checked out. Going to see about getting it for a good deal from the dealer and look into supercharger rebuilds.


here is a video of the Viper being pulled out after the Dyno, didn't get a video of the dyno
https://youtu.be/2FXH6xTTfm8

 

[lobra97]

couple of gents on here have vipers, any pics?

 

[DHG1078]

Was it built by Hennessy?

 

[R.D.P.]

Sounds like a possible case of someone putting their problem up for sale. Glad you're taking it to a shop to have it checked out.

 

[Sn95Snake]

Well I just had it checked out and put on a dyno, the Supercharger is done. Not putting out any boost and it dynod at 488.44 rwhp & 558rwtq on the first run and 469.93rwhp & 562.96 rwtq on the second run. which explains why is doesn't feel faster then the Cobra.

Glad I didn't buy it before getting it checked out. Going to see about getting it for a good deal from the dealer and look into supercharger rebuilds.

 

[Sn95Snake]

Was it built by Hennessy?

No it was built by a shop in California I believe.

 

[GTSpartan]

I have a Roe sc on my build '96 GTS. Runs like a raped ape. As with everything, it's all in the tune. At 2.8L, it's quite small for and engine of this size, and no intercooler means 7-8# is all you will typically see without other modifications. Meth or the juice will allow you to run more. On an otherwise stock engine, you will see 600-650rw.

 

[Sn95Snake]

I have a Roe sc on my build '96 GTS. Runs like a raped ape. As with everything, it's all in the tune. At 2.8L, it's quite small for and engine of this size, and no intercooler means 7-8# is all you will typically see without other modifications. Meth or the juice will allow you to run more. On an otherwise stock engine, you will see 600-650rw.

It has an intercooler & meth/water.

 

[GTSpartan]

It has an intercooler & meth/water.

Very interesting.

I have no idea how they could possibly fit an intercooler. There is zero hood space for the addition of an IC. Must be some elaborate custom piece.

 

[Sn95Snake]

Very interesting.

I have no idea how they could possibly fit an intercooler. There is zero hood space for the addition of an IC. Must be some elaborate custom piece.

actually may just be a heat exchanger, sorry man the dealer wasn't able to tell me much I had to research most of it.

 

[highdensity007]

My '97 Gts is def different than anything I've ever driven. Visibility is limited, you just get used to it. I'm turbo'd. I'm sub 1000whp. It's an animal. I still prefer driving the stang though.

I heard that the superchargers on the gen 2's have a lot of pressure on the pulley and they break but they make great power.

 

[highdensity007]

Very interesting.

I have no idea how they could possibly fit an intercooler. There is zero hood space for the addition of an IC. Must be some elaborate custom piece.

actually may just be a heat exchanger, sorry man the dealer wasn't able to tell me much I had to research most of it.

My intercooler

 

[Sn95Snake]

It is a beautiful car, just trying to get the dealer to either come down significantly on price or get everything fixed has been a pain so far. We will see how it goes, if the dealer refuses to budge I will walk.

 

[rotor_powerd]

Dealer will likely pass and just wait for some sucker to come buy and lay down cash without having the car gone over.

 

[Sn95Snake]

My '97 Gts is def different than anything I've ever driven. Visibility is limited, you just get used to it. I'm turbo'd. I'm sub 1000whp. It's an animal. I still prefer driving the stang though.

I heard that the superchargers on the gen 2's have a lot of pressure on the pulley and they break but they make great power.

How commonly does this happen? Do you happen to have any links on the subject. I have been able to find very little regarding the ROE supercharged Vipers.

 

[Sn95Snake]

Dealer will likely pass and just wait for some sucker to come buy and lay down cash without having the car gone over.

That is what I am afraid of, but I will just have to see how it goes.

 

[nofire]

I think I've looked at this car before and considered buying it....

 

[highdensity007]

How commonly does this happen? Do you happen to have any links on the subject. I have been able to find very little regarding the ROE supercharged Vipers.

That I couldn't tell ya. I recall reading some stuff on one of the Viper forums about the snout having issues with pulley pressure. It's been awhile.

 

[GTSpartan]

My '97 Gts is def different than anything I've ever driven. Visibility is limited, you just get used to it. I'm turbo'd. I'm sub 1000whp. It's an animal. I still prefer driving the stang though.

I heard that the superchargers on the gen 2's have a lot of pressure on the pulley and they break but they make great power.

How commonly does this happen? Do you happen to have any links on the subject. I have been able to find very little regarding the ROE supercharged Vipers.

That's how I popped my motor. Spun the dampener off and effd'up the crank snout. You should key the crank. If not, I would inspect every oil change.

It's a very rare occurrence, so I wouldn't be terribly worried about it.

 

[GTSpartan]

My intercooler

Very nice. I should have said there is no room for the heat exchanger brick under the SC. No way to cool the intake charge without meth or nitrous.