Are my dyno #s too low?

[Moundir]

I dynoed the car the other day with borlas, smooth tubes, and k&ns with a 3.55 rearend and It only pulled 407hp and 441 tq I then pulled the cats out, and put in 02 syms, drove the car for 10 min with a couple of wot runs, and let it cool down. I redynoed at 410 and 448 this time Are these low #s or what?? Car only has 1500 miles on her btw. I'm quite disapointed with my #s

 

[Viper Specialty]

I really dont think 10 minutes is enough to have a computer "learn". At least in the case of 3000GT VR-4's w/OBD-2, they need about 10 CYCLES to learn. (a cycle is a start, drive, stop...with min of 15 Min per) Also, 3.55's have a tendancy to drop dyno readings, dont they?

 

[Nexus-6]

Wow - those do sound pretty low for an '02 with your mods...I seem to recall seeing 43x and 44x for another (albeit stock even) FE in the past 2 weeks so that does raise my eyebrow too.

Have you ever dyoned at this place before? Do you know if they read high or low relative to other dynos?

And like Daniel pointed out, perhaps gearing affected the #s?

 

[Bob K]

I would say that your numbers are low, given the mods you have done. Would have been nice to get a baseline dyno while it was still stock. My FE GTS, which is totally stock with 850 miles, dynoed at 414.5 rwhp and 453.6 rwtorq. This was much stronger than I expected ( I thought 400 - 405 rwhp would have been decent). With your mods I would expect mine to be at least 430 or more. I don't think the 3.55 is the reason. They should only make it reach its peak faster.
Just my opinion,
Bob K

 

[Russ M]

Moundir,

Don't worry those are fairly normal results for post 1999 vipers. I have seen several dozen dyno pulls with 2000 creampuff cars and they are always the same.

The only way you are going to get any serious hp gains is with your mods and a good set of headers.

The other threads that are insinuating that 2002's pull more than the average creampuff are just wish full thinkers. And before they chime in here and tell you your car is weak, have them take their car to the dynojet you went to. I would be willing to bet the results will be the same as yours.

 

[BigCarrot]

I wanna say my R/T did 420 with smooth tubes, K&N's, and muffler delete. Let the motor lossen up a bit and try it again. Gars bring the number down a little too.

 

[King RT10]

My 1999 Rt10 Dyno'd at 424rwhp with smooth tubes and rear muffler delete.I also had a 3.55 gear.

 

[ElDiablo Viper]

My car with 1500 miles dynoed at the same dyno 430RWHP and 467RWTQ. That was with smooth tubes, K&N and Corsa. 1000 miles later after taking the cats out w/o driving the car it dynoed 437RWHP and 480RWTQ.

 

[BigCarrot]

I wanna say my R/T did 420 with smooth tubes, K&N's, and muffler delete. Let the motor lossen up a bit and try it again. Gars bring the number down a little too.

Oh, for the record, I don't think "GARS" make you show less hp on the dyno. A gar is just a fish. Gears however..... And don't let the motor lossen either, whatever that is. I hate how you can't do back and edit posts after you get some sleep and can see straight! lol

 

[ElDiablo Viper]

3.55 will dyno 5-7HP less that 3.07

 

[C O D Y]

I put down 438 in my 02 FE with smooth tubes, K&N's, and muffler delete.

I'm going to another dyno day (different dynojet) this week and will let you know how it goes. But yes, those numbers are low for any viper with those mods.

 

[SylvanSRT]

Let the car get broken in follow the proper miles and rpm reomendation! It will pay dividends later and may save your motor! WOT how many miles so far!

 

[Moundir]

I did follow the break in procedure to the tooth Man I'm really ********** cause 410 is so weak. I'm gonna have to redyno again with Eldiablo to see what the hell is going on with my car

 

[Jerry Dobson]

FYI Most of the Vipers seem to continue to gain HP up to about 15k miles, then level off. Fresh motors always seem to dyno less. The big factor could be the Dyno itself. None read the same. Is your Dyno a Mustang or a DynoJet?

With a 355 gear figure about a 2% loss or 8hp. Then you would be at close to 420hp. You are just slightly low. I have seen stock Vipers dyno anywhere from 390 to 437hp. The Viper motors vary a lot.

 

[BlueGTS]

Mike,
How does your car pull compare to ElDiablo's? Does he pull you, or are you even with him?

I would not get bent out of shape over your dyno numbers. The difference between 415 and 435 is more useful in your signiture than anywhere else. To brag about a 435 and look down on someone who has lower 400's does not make any sense. The difference between the two cars is academic. These are all starter numbers in the world of modding. Especially since you are thinking about a Scer. We all know you will be modding it more so you will get the numbers down the road. I am sure you will get big gains from headers. Every car responds slightly differently to different mods so do not sweat it.

I will bring my stock car out so you can pull it, I am sure that would make you feel better.

 

[dwhitt]

Don't feel too bad.

My '99 RT/10 (non-"Cream Puff") only put down 362 hp (SAE). It was bone stock. Not sure what the problem was. It really did not feel any stronger than my Gen 1 '95 RT/10. The '95 ran a 12.57 quarter mile with my wife behind the wheel. Only had K&N's and smooth tubes.

I have not put my '02 on the dyno. Too scared after my '99's weak pull.

 

[Moundir]

Wow 362 means that you had a problem more likely than anything, so dont be afraid to put the creampuff on the dyno lol. I'm not getta get too bent outa shape till I run some simalarly modded Vipers to see what mine is really like. Dyno #s are not the end of the world for me, as long as I beat Eldiablo I will be happy

Aaron I dont think my car will pull on anything I will have to run ElDiablo soon so I can see what is going on with my car. I already raced him at the track where he ran 12.6 and I ran 12.7 but my mph was 1mph better. I had bigger traction issues due to the 3.55s

Jerry that was a dynojet not a mustang dyno, why do you ask?

 

[Cudaman]

Arn't Viper's sapost (sp) to have 450 horse stock?

 

[Joseph Houss]

Arn't Viper's sapost (sp) to have 450 horse stock?

Yes, and they all do. 407 HP in this case is rear wheel horsepower. Modest driveline loss of 12% when factored in to the equation yields 462 HP at the crank... which is more than promised. The issue being discussed here is why, with the modifications done to this Snake, isn't the HP even greater.

 

[2BADD 4U]

Joe! Very well explained!


Dave

 

[Tiepilot]

My stock (no engine mods)'96 put 400 RWHP and 463 Torque. Smoothies and Filters with a muffler delete is all the mods I have.

 

[BlueGTS]

Mike,
If you pulled 1 MPH on him than your car is "faster." ET shows how well you launch while MPH shows HP. As a general rule of course. I am sure you know all that.

If you guys are running very close at the track I do not think you have anything to worry about. So, what MPH did you guys run?

 

[ElDiablo Viper]

I'm not happy with my numbers but they were good enough to beat Mike and his 3.55's
I run 12.60 and Mike 12.75. He beat me in MPH when I run 114.53 and he run 115.34mph.

My best 60' was 2.114 but I missed 3rd, so for my 12.6 run I only had 2.171


So I got beat by 0.81MPH
and beat him by 0.15sec

 

[Russ M]

As I attempted to explain before on several occasions MANY dyno jet facilities give erroneous numbers. Whether it is intentional or not, it happens very often.

Viper that pull 430 bone stock will in actuality pull 402 at the properly run facility. As I have witnessed on several occasions.

If you want to get a fair comparison to other vipers then you need to go to the same dyno, preferably on the same day.

 

[Tomer]

TiePilot, yee haaaaaaaaaaaaaaw what #s!!!

That's cuz you have the super rare 96 RT...First RT with stripes, and we all know the stripes
add some HP...

And I am not biased...

Tomer

 

[ElDiablo Viper]

As I attempted to explain before on several occasions MANY dyno jet facilities give erroneous numbers. Whether it is intentional or not, it happens very often.

Viper that pull 430 bone stock will in actuality pull 402 at the properly run facility. As I have witnessed on several occasions.

If you want to get a fair comparison to other vipers then you need to go to the same dyno, preferably on the same day.

My 430 RWHP run was on the same dyno as Moundir's 407RWHP run.

 

[BlueGTS]

You should have them overlay the two graphs so you can compare them. Often the peak numbers do not tell the whole story. I am guessing from you track times and MPH that your graphs are fairly similar. Often times peak numbers occur within a 100 RPM window which will not do much for your 1/4 time but will improve the look of your Sig.

 

[Russ M]

Eldiablo,

I do not mean to rain on your parade but unless your '02 has headers/exhaust/high flow cats the chances of pulling 430hp at the wheels is very unlikely. Unless your dyno jet opperator is counting the burp when you car hits redline.

All the creampuffs I have seen have no measurable hp or torque gains from exhaust/filters. It takes headers to wake them up.

 

[Bill Pemberton Woodhouse]

Guys, guys, the issue you here is about a piece of paper stating what you feel the car MAY have, as the same dyno ( and the same car ) can run
tremendouslty different one day to the next ( air temp, humidity, etc. ). The fact that El Diablo only beat you by 1/10th, and he has had his car for quite
awhile, would lend me to believe they are very equal. Give yourself some seat time, and try it again sometime in the future. I used to crack up when
my cream puff would go down a straight in Viper Days and pull the guys who had larger Dyno numbers. We always remember the highest readings, and
those are the ones we quote, yet Dynos can vary so much. Real world it sounds like a strong car, so wait till you get around 5k and try again. Viper
motors are tight, and some break - in faster than others, but I would go more with the strip time than the dyno sheet.

 

[ElDiablo Viper]

Again my car dynoed 430RWHP and 468RWTQ with Corsa, K&N and smooth tubes with 1500 miles on the same dyno as Moundir.

On a different dyno on a VERY hot day it dynoed 437RWHP 480TQ with the mods above plus NO cats and VEC1 set to 0 0.
I dynoed my car 4X with the same numbers.

Also please don't forget that I have STOCK 3.07 and Mike has 3.55 gears which should give him more TQ to get better numbers.

FYI My friend with STOCK 97 GTS dynoed 425RWHP on the same dyno. Why is it so hard to believe that some cars dyno better than the others?