Dyno Day Results

[Performin Norman]

Had a great time. Here are the results.

Performin’ Norman’s Dyno Day Results!

Uncorrected:

Car Horsepower/Torque
‘02 Corvette Z06 364/362
‘98 Viper GTS 427/488
’98 Viper GTS 434/486
w/smooth tubes
and Sean Roe filters


Corrected:

Car Horsepower/Torque
‘02 Corvette Z06 352/350
‘98 Viper GTS 413/472
’98 Viper GTS 424/475
w/smooth tubes
and Sean Roe filters

It was an absolut

[Maxwedge]

Im really suprised at the numbers for the Vetts. Have you seen any other Dynos sheets for Vetts and what do the owners think??I know the Vip[ers typically fall inbetween 400-425bhp, even tho the Factory rates them at 450Bhp(can you say SUCK). Insofar as the Chevy is concerned, the F-Body LS6, GM gave them a 325 Hp rating and thats what they typically run. However The GMC Trucks 5.3 is supposed to put down 280Bhp...and those trucks do the same 1/4 mile as the 180bhp 360 Rams....I dont think the 5.3 puts down 280bhp especially since Ive driven one. No frealin way its 280....
anyway
Damion

[Performin Norman]

Z06s are dynoing at about 350 to 360 RWHP. That puts them right at the factory engine rating.

Vipers (GenII) are dynoing around 410 to 420 RWHP. That puts them over the factory rating.

LS1 Fbodies are dynoing at about 310 RWHP. That puts them over factory ratings.

[RAM MAN]

Awesome results

where was it dyno'ed ?

how long did it take ?

was the approximate cost to get 1 car dyno'ed (if you don't mind me askin'...)

while my truck will never match those numbers, I'd be curious to see how close I can get to 300HP someday.

[Performin Norman]

Originally posted by RAM MAN
Awesome results

where was it dyno'ed ?

how long did it take ?

was the approximate cost to get 1 car dyno'ed (if you don't mind me askin'...)

while my truck will never match those numbers, I'd be curious to see how close I can get to 300HP someday.

MCRacing in Merriam KS. Suburb of Kansas City.

It takes about 30 minutes per car including cool down to make 2 or 3 runs.

It costs $48 per session of two pulls back to back. (includes cool down time)

It is a blast. Have fun. They can also do wide band 02 tuning. That is the cats ass.

[Maxwedge]

NOrman
We must be looking at different sheets, due to the fact that the Z06 is supposed to be putting down 385-390bhp and the Gen @ Vipers are supposed to be putting down 450bhp..Now we all know 400-425 is the realistic Viper number...But GM is usually a little more Honest. The 350-360 number is a big disappointment to me...
anyway
MW

[Performin Norman]

I'm not sure we are communicating in the same language. RWHP and BHP are totally different. On an chasis dyno we are measuring rear wheel horsepower. This includes parasitic losses due to tranny and other engine losses like belts and such. 350 to 360 RWHP with a 12% driveline loss equates to 400 to 410 horsepower (roughly). When you do the same to the viper numbers you get 470 or so horsepower.

I hope that clears up a bit.

Now one more thing. The Vette weights over 300 pounds less than the GTS so you get a closer straight line performance than the horsepower numbers dictate. Its a tangled web we weave. hahahaa

[Maxwedge]

Thats news to me norman.
I thought there were 2 types. SAE Horse power (ie HP measurements taken at the Fly Wheel) and Break Hp(a measurement taken at the rear wheels..also known as RWHP). Since the early 70s all auto manufacturers were mandated in the US to supply HP figures of the RWHP/Bhp variety.
at least that is the way I understand it.
maxwedge

[Performin Norman]

All new cars are rated at engine horsepower including engine peripherals. The SAE horsepower ratings of the 70s and earlier are not the same. They do not take into account for the parasitic losses. Now, when I posted my numbers, I am talking power at the rear wheels which means you lose power thru the drivetrain. I used to have some articles that I found online that talked in more detail but due to a hard drive crash, I lost it all.

If you have time, do a search on SAE and BHP horsepower and you will probably find these sites easily. The automotive industry has never offered RWHP figures as a standard. I wish they would because they are more realistic. ie. Ford Mustang Cobras were rated at 305 horsepower back in the early 90s. When chasis dyno'd, they produced much much less. This in compared to a LT1 Camaro that was rated also at 305 horsepower but would beat the sox off the Mustang in the 1/4 mile. Traps speeds also being much greater than the Mustang. Some of the newer magazines like Motortrend and such occassionally run tests and they will chasis dyno a car to see what they are actually producing to the rear wheels. Its really fun to dyno a car. If you get a chance, check it out.

BTW, I am sorry if I sound like I am contradicting you. That is definitely not my intent. Please don't take it that way.

[ENG12]

Performin Norman is right all new car are rated at the flywheel not the rear wheels drive trane loss is something like 12-18% depending on the car. In the 70's there was a switch to real flywheel #'s before they would rate them with open headers no water pump and silly things like that. Now they rate them just as they are in the car, but still at the flywheel.
Hope this helps

[Maxwedge]

Norman
No big deal man. Thats why we are here, if we knew it all we wouldnt need to be... Its all good
Maxwedge

[Performin Norman]

That's great. I just don't like stepping on toes.

[TimberwolfPB]

Ram man:

I see you are in Haslett. I am in Battle Creek. There are a few good dynos shops around us. I have dyno'd my camaros at Detroit Speedworks
Drop me a line if you need some info.

[Viper 10]

Originally posted by ENG12
Performin Norman is right all new car are rated at the flywheel not the rear wheels drive trane loss is something like 12-18% depending on the car. In the 70's there was a switch to real flywheel #'s before they would rate them with open headers no water pump and silly things like that. Now they rate them just as they are in the car, but still at the flywheel.
Hope this helps

Well guys, I just got the driveline loss factor from Todd at Arrow Racing. These are the guys that build and re-build the Viper V-10 engines for DC. Sorry to say but you two are both wrong on your driveline loss factors.

Todd called me this afternoon to tell me that my engine had finished dyno'ing, and was shipped to my local Dodge dealership. He told me that Viper engines definitely have less driveline loss than other engines. The number that they use as a standard for the Viper's V-10 is 10% (5% loss at the transmission and 5% loss at the differential).

I hope that this puts to rest this debate. Good news is Norman that your car dyno'd right at the factory spec's.

The Fat Lady Is Singing...

Brad

[Viper 10]

Anybody home here?

Bueller?

[Viper 10]

Bueller....?

[Maxwedge]

Brad
Seems that an informed opinion against conventional (and wrong in this case) wisdom wasnt much appreciated...HMM ...hey have you discussed this with GrumpyVett??