jpc350z

No more ponies but you will pick up a few that were lost on a heavier horse.. By the way get ready to re-learn how to drive a stick..It rev's very fast and takes time to get use to it..

Barzten1

iTrader: (18)

Are you still glad you upgraded your clutch/flywheel?

chaparro78

iTrader: (2)

I had my Vortech installed a year ago and made 408RWHP. I went back put it on the dyno again and only made 386RWHP. There is roughly 15K miles on the S/C. The temp was definately different though. From 70F to 102F. Dunno how much difference that would make.

jpc350z

Yes, no regrets at all. But it does force a quicker shift response to get out of first before running out of rpm even with a 7100 rpm rev limiter..Going up a hill on a red light is challenging. You will over rev until you get the feel.. You will not regret the mod..

mcduck

nah.... CPRacing was running the Dynojet conversion equation on all my runs. I **wish** the explanation were that easy.

mcduck

20K miles is a LOT of wear and tear on a SC-ed engine. My original intent was to retune once a year anyway. It's just a good maintenance practice on a car with FI that was not originally designed with FI.

mcduck

if both runs were SAE corrected on on the same dyno, they should be relatively close. I think a variation of 20+hp definitely show there is some power loss over time (or rather mileage) on the motor.

booger

iTrader: (6)

Exactly what I was thinking . In the quest to keep and gain buisness from guys that want thier car to be powerful . One dyno operator may add 13% and the next might add 17%

taurran

iTrader: (18)

Lookin good!

A little off topic, but does anyone know when Speed Dreams is going to install the SSV on their Turbonetics car?

Barzten1

iTrader: (18)

He's being sent a SSV as we speak and is gunna put it on his 05' with a already installed Turbonetics!

lsdunique

iTrader: (3)

Speeddreams, so I am clear and everyone else is

STOCK plenum dyno - 338
SSV after run (no tuning) - 357
SSV tuned - 397

Please confirm this if this is indeed what happened. if you could post the dyno charts or email them to me at jamisonl@msn.com that would be GREAT. I am trying to compile all the dyno runs and A/F curves so we can better serve our customers.

Is there a formula for sompensating for the high elevation? I dont know the numbers off hand, but I know the 5000 ft. elevation definately changes power output. The elevation could explain the 337 stock vortech number.

xxlbeerZ

iTrader: (8)

I thought Turbonetics didn't work on '05?

Barzten1

iTrader: (18)

I'm sure his is a newer one because I think it only has 5 or 6k miles on it. maybe its an '04.

350zDCalb

iTrader: (21)

Isdunique:
To help answer your question regarding altitude and power loss...

This seems to be a hot topic lately...Ernie and I actually compared some numbers and conducted a little research to get a pretty good idea of how altitude really affects these cars-keep in mind-we compared the numbers in a twin turboed application...
I won't bore you with all of the numbers (and I forget the numbers exactly and am too lazy to go look them up)...the "actual" number that the dyno spits out (dynojet)-is set up with an automatic correction factor that subtracts around 18% from the SAE corrected number (the over-exaggerated number that is trying to tell you what the car "would" make at sealevel)...we have found that 18% is not so accurate for a turboed car, as it doesn't lose that much power

The correction factor we determined was closer to 10% power loss

I am guessing the number should be similar for a supercharged vehicle at this altitude...the difference in a supercharged car vs turbocharged is that the pulley on the supercharger-say it is set to make 9lbs of boost at sea level--will typically make a little less boost at higher altitude (this has been demonstrated numerous times-i won't quote exact numbers because I'm not an "expert" in this department) Whatever the actual boost number is- the same 10% loss of power numbers should still serve to be accurate for calculating HP and TQ...

SpeedDreamTuner

This is exactly what happened. Altitude doesn't effect the numbes in the correction factor. We have had several people use the dyno and not only mention that their numbers were inline with several others from around the nation, but we also had several use it and dyno elsewhere and be within +-10 horse of their number. Pretty negligable but I did think about that. The correction factor or formula is usually actual x 1.13-1.23 = SAE. That's about the general range and it varies more on weather conditions than anything else.

Additionaly, Jason has the stock Vortech pulley on his car. Didn't change it at all and we saw 8PSI maybe even a shade into the 9's on his car in our room at our altitude. I had one other member verify that to settle the elevation boost issue. Other than that, I can only imagine the 3.33 pulley makes 10+PSI at sea level?

I'll try and get to the shop today for that info. We've been to busy getting our cars to the track this weekend that we totally spaced it.

Barzten1

iTrader: (18)

Is my 397 a corrected or uncorrected # ?

SpeedDreamTuner

SAE corrected