fstpassat

I finally dyno'ed my new setup today which consists of an RR-Racing intake, RR-Racing tune, PPE headers, Joe Z exhaust, and no cats. This was on a Dynojet 248C and all runs were done in 6th gear. Runfile4 represents these mods below. On this graph you will also find my best numbers for each progression of modification.

Michael.001 - Stock
Michael.003 - Joe Z exhaust
Michael.005 - Joe Z exhaust, PPE catless headers
RunFile_004 - RR-Racing Intake, RR-Racing Tune, PPE catless headers, and Joe Z exhaust.

The car has picked up power with each round of modification(you determine if the increase is worth it) and I thought some might find this interesting. All runs done on the same dyno in 6th gear, separated by about a year each. Not back to back, but about the best normal people can do.

jat0223

iTrader: (1)

Do you have the tuned intake?

jspecvtec

iTrader: (4)

Weird how joe z exhaust made more power than headers? Weather temps different on the runs?

fstpassat

The Joe Z exhaust didn't make more power than headers. Look at the graph again - 383whp vs 397whp, 356wtq vs 376wtq. The higher numbers are with PPE headers.

Yes, I have the RR-Racing tuned intake.

ping83

iTrader: (8)

Good quality test results! Thanks for sharing.

jspecvtec

iTrader: (4)

I meant the gains from joe z vs stock was about +18whp/+4 torque. The gains with Ppe headers on top of that new baseline was only +14whp/+20 torque. Header gains are usually 30-35whp?

USB_F

iTrader: (11)

I figured you would be about 415-420whp

minator

I thought the people getting those numbers used std correction instead of sae. Lots of people asked that about RRdynos too.

RRRacing

iTrader: (1)

Hey all,

fstpassat, Thank you for sharing your dyno results.

I think it is important to note that the dyno results posted with our tuned intake were performed with the intake box closed. We recommend opening the intake box lid, and directly cool air at the air filter.

The stock intake box has a flapper door that opens and pulls in cool air when the hood is open on the dyno. Our airbox relies on sufficient airflow to the front of the car, and you simply cannot achieve that kind of airflow on a dyno, so you have to open the lid when dynoing.

So I am willing to bet that the actual intake air temps on this dyno run were 30-50F above ambient, particularly at the higher RPM's where you hit peak power, and especially since these were long runs performed in 6th gear. That can easily contribute to a 15-20hp drop in power. This drop in power is not real, because in the real world, intake air temps with our intake above 30mph are within 10F of the ambient air temp.

Bottom line is that if you really want to compare dyno runs, logging IAT is important.

-Rafi

jspecvtec

iTrader: (4)

RR charts are SAE. We have SAE and STD charts when dynoed. Here in CA the SAEs were 8-10 whp less than STD. Bnizzle was 424whp std so SAE was around 415whp

zazzn

no care, 5 psi negates all these mods

WHERE's that supercharger kit!

zmcgovern4

iTrader: (2)

http://www.rr-racing.com/RR-Racing-R...isfscr1001.htm