These numbers are on a DYNAPAK 5000 dyno. The car is hooked up via the hubs. no rolers here. this is what is done to my car..
AEM type R 3" cold air, Skunk2 manifold, DC 4-1, Apexi WS catback, CTR crank pulley, AEM alt. pulley, no p.s. or a/c. , Fuel pressure regulator, MSD CAP, MSD COIL, MSD wires, Platinum plus 4 plugs, ACT streetlight flywheel, Exedy Clutch, OBD1 conversion with skunk2 program.
so the dyno said i made almost 189 whp. i also heard two different stories, that dyno jet dyno's are more acurate and dynopak are inaccurate. but then another place told me the exact opposite. does anyone know anything that could clear this up. i have pics of the dyno graphs if anyone knows how to post them up for me.

 

You didn't mention what car you have, but it sounds like a GSR. Good numbers.

From what I've gathered the dynapak is actually more accurate, but I don't think there's a huge difference neway. I'd like to see the graph. I know we-todd-did-racing does image hosting for nothing. Try that or send em to me and I'll post em.

http://www.we-todd-did-racing.com/
timonex@starband.net

 

are your cams and pistons stock?

 

its a 1996 4-door GSR internally it is 100% stock with just over 93000 miles. and i have a friend with skunk2 stage 1 cams, dyno tuned on a dynojet dyno that only put out like 168 to the wheels. so im just kinda confused is all

 

forget the ANDLUDE part my computer is gay and wont let me sign back onto the 4DoorGiSzeR name. this is still The ORIGINAL poster of this topic, just under another name is all. i hate computers

im trying the link you said, if i cant figure it out i will send you the pics. but i will get them up for sure, my torque graph is sick looking, like a heart rate.

 

I guess his car is just better tuned than your friend's car is.

Or your car is better tuned than your friend's if you're gonna start ID swapping on me.

 

 

 

Couple things:

1. I own a Dynapack (only a 2000 ) and I've found that on average it tends to read about 10-12 hp higher than a Dynojet for cars at your power level. This is most likely due to removing the wheels/tires and their attendant inertial and parasitic losses.

2. Accuracy of chassis dynos is a pointless discussion. None of us really knows which is more accurate. What is more important is _consistency_ of results so you can measure changes when tuning or swapping parts. I believe that any dyno can be very consistent (the Dynapack is guaranteed to 0.3% repeatability) as long as the operator knows what they're doing. However, the Dynapack setup makes it easier to maintain consistency as strap down tension, tire pressure, tire wear, alignment, etc. don't play a role.

3. Based upon the many B-series cars I've dyno'd, your results seem good, but within the range I would expect on a Dynapack. You can probably expect your car to put down mid/high 170's on a Dynojet, which is still quite good.

C_A_T

 

thanks alot for the response, it makes me feel alot better about my numbers coming from another owner of a Dynapack dyno. The shop i used was GRD performance, and they have the 5000 model. but thanks alot for the info

-dusty

 

We need some kewl dyno owners like you in MI. All of em around me seem like eggheads.

Is any attempt made to compensate for the parasitic losses from the wheels & tires absence?

 

anyone else have opinions

 

the dynapack is awesome

i help out at Eurospeed in Raliegh, NC. They have one..and it's consisten as hell. I also like the fact that it's portable.

It gives good numbers, that are very comparable to the dynopack here in Taylorsville.

 

Like Shawn (C_A_T) said, DynaPack reads about 10-12 hp higher than a DynoJet-at your power level. Not bad numbers. The reason that the torque numbers look like that is the scale-if the scale was set to every 5 or 10 ft-lbs., the graph would be much smoother. One of the best things about the DynaPack, is the ability of the tuner to do part throttle tuning, if you have Hondata or other programmable engine management.

 

this is 4DoorGiSzeR, i cant get andlude to log out.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kikomon &raquo;</TD></TR><TR><TD CLASS="quote">nice HP numbers
seems like youd run better times than that. How much traction? I can run 9.8s with Azenis I believe. my best with no traction is a 10.3 (im talking 8th)</TD></TR></TABLE>

These times were last may i think or april. since then i have gotten an ACT flywheel, exedy clutch, Type R 3in cold air, skunk manifold, CTR crank pulley, OBD1 conversion with a skunk2 program and a new stock tranny with like 26000 miles on it. so i should be 14.3 - 14.4 by now. i cant wait to go to the track again. we are going on wednesday.