Which is faster???

[GR8_ASP]

On the street you will not get the heat build-up issue reducing power like on a track. And if the start speed is 40 or more the Paxton can start in second and avoid a downshift and still provide more acceleration. I say on the street it would be no contest. You should be able to modulate the go pedal to avoid excessive tire spin, especially if you are not in first. In first I have found it quite difficult to modulate and prevent overspinning the tires.

 

[Viper X]

Trying to compare road course "track" performance with street performance doesn't work very well. Too many variables. As stated earlier, Paxton cars do very well on the street from 40 mph up.

As you add more power to the Paxton car, which is relatively easy, you can add stickier tires, Motons, a Quaife, 1000 hp half shalfts, AEM, etc. and really get crazy without sacrificing drivability.

N/A is much more limited in total power and drivability at higher power levels.

Dan

 

[Steve 00RT/10]

This must explain my situation. I simply cannot explain it any other way as to why I was not only competitive w/ the higher hp s/c cars, but in many cases actually faster than those two s/c cars on the track.

The Roe car was not competitive in the turns at all, but like I said I believe I walked him in the straights b/c 1.) I jumped on the gas quicker than he, and 2.) He was suffering from heat soak, and 3.) he might have been predetonating and 4.) He was simply not as ballsy and 5.) I have the new PS 2's and his tires sucked.

The Paxton was a beast, but I was shocked I was close to him at all. We drag raced two times, I kicked his ass both times, but again due to traction problems for him, not power. I even let him start first the second time, I passed him when I shifted to second. This brings up the old argument of "usable power". If the Paxton/Roe power can only be used w/ special tires and special circumstances on cool days in straightaways....is it really worth the investment? Like Gr8Asp said, he was faster stock. I am thinking if I maxed my car out to say 600-625 rwhp n/a would this be a more competitive car for 95% of driving situations than a 775 rwhp s/c car?

Other than a quirky idle problem, I have had zero issues with my 5 pound Roe over 20,000 miles / 1.5 yrs.and am quite happy with the performance in any weather condition. My power is all usable for the things I like to do. I'll guarantee that with equal drivers / tires.... a 5 pound Roe will outperform a stock Viper on a road track.

Our car has high lift roller rockers, 3:45 gears, Fidanza flywheel, Belanger headers and exhaust, Hayden rear calipers. Looks like I have $7,987 into the SC. I am self installed / tuned........have never been to a dyno with these mods, but am guessing just under 600 RWHP with big torque at 2500 or so. This about the perfect set up for us. Heck, I've even gotten close to 24 MPG on the last trip we took a couple weeks ago.

As for your question about which way to go; You mention 95% of driving situations. That would be on the street -- not track for us. One or two track events a year amounts to less than 1% of our miles. I don't drag race. A TT/SC car on the street will pretty much blow away a stock Viper anytime, anywhere. If 95% of your use is going to be tracks, 600-625 RWHP NA may be the way to go. I'm not sure there's a one size fits all perfect solution for every driving situation.

GR8ASP mentions that he was faster pre SC. That might not be the case if he hadn't had a life altering experience just prior to turn 1 of G-Man when he lost his ABS at very high speed a year or two ago. I don't think he soiled himself, but I'm sure he was close . It was captured for posterity by my wife. I think that experience tempered his right foot some. As for the weight issue, as I'm sure you know, the Roe sits right over the engine.......not up front like the Paxton. I'm guessing maybe a 60 pound adder.

Your experience with the Roe car was not a good comparison to base your opinion on. I just put PS2s on and have yet to get them on a road track. But.......3700 miles and an autocross have proven them to be heads above the MPS tires I used for 68,000 miles.

Steve

 

[black mamba1]

I think the Roe s/c is a great blower. I have some Roe stuff now and Sean is great and the service there is great. I wish he would release his gen 3 blower so we could add it to the Gen 3 Vipers, but....
Anyway my experience w/ Roe's are limited. I love big power. I would go up to 800 rwhp if I could get it to the ground and if it does not adversely affect drivability. It is kinda strange, I have talked to guys w/ 800-900 rwhp s/c and TT and they often say they wish they would have stayed around 600-650 rwhp n/a, and the guys w/ 600-650 rwhp often want to go up to 800-900 rwhp. I think the best thing for me is to max it out n/a first, see how I enjoy the car, and if not satisfied then throw the blower on....then look out!

 

[V10TT]

I would take the NA for the close win. I think a well thought out NA set up that can shift at 6300 rpms, can take the win.
How many 650 RWHP Paxton cars trapping onver 130 mph?
A 600 rwhp NA car will trap over 132 mph all day long...
just my opinion.

 

[black mamba1]

I would take the NA for the close win. I think a well thought out NA set up that can shift at 6300 rpms, can take the win.
How many 650 RWHP Paxton cars trapping onver 130 mph?
A 600 rwhp NA car will trap over 132 mph all day long...
just my opinion.

Does compression ratio factor in for the higher shift point? I have been told that for the s/c set up, techs often drop the compression ratio. If not, why do NA cars trap faster?

 

[96-RT10 Supercharged]

Just my 2 cents .. Water / **** can help on the power / heat soaking consistency issues w/SC cars. I've heard many debates over the Water/**** issues, but if it's used for power consistency at high temps vs. used to gain hp by increasing boost and timing, it will help alot.

 

[Viper X]

Water / **** injection will lower hp and tq if timing is not increased and tuning modified, so installing a water / **** system can have some adverse affects. It should help with heat soak though if a small power loss is acceptable.

 

[black mamba1]

Water / **** injection will lower hp and tq if timing is not increased and tuning modified, so installing a water / **** system can have some adverse affects. It should help with heat soak though if a small power loss is acceptable.

Viper X, how did you best use your 925 rwhp Paxton car?

 

[black mamba1]

I would take the NA for the close win. I think a well thought out NA set up that can shift at 6300 rpms, can take the win.
How many 650 RWHP Paxton cars trapping onver 130 mph?
A 600 rwhp NA car will trap over 132 mph all day long...
just my opinion.

Why do NA cars trap at a higher speed then the s/c cars?