this weekend's dyno results

[twilightprotege]

hey guys.

well i'm back from the dyno and the results were a little dissapointing to say the least....but i will explain.

as we all know, the stock p5 puts out around 98whp. the stock miata (1.8) around 116whp right?

well.

on the dyno, a completely stock (and pretty new) miata put out 89whp. a p5 with a muffler and sri put out 83whp. way less than what it's supposed to be. a 1.6L 3rd gen protege (sri and cat back) put out 67whp too...once again, less than it should be.

so what i did was work out what they should really be getting and apply that to my result....and it all works out.

the stockish p5 using my calcs got 105whp, miata got 114whp, 1.6L protege got 85whp.

now for my figures.

the figure i got 107whp. now i know that is way way way wrong....esp considering my last figure of 111.5whp!!!!

anyway, using the calc from above i get 136whp. now that i am happy with. and the other good thing, with the silencer out of the muffler, i only dropped to 132whp. power figures are the same up to about 5000rpm too, but w/o the silencer the power goes up from 5000.

anyway, i will go to the dyno place i have been to previously and see what results i get there and report back.

 

[twilightprotege]

i should add - does anyone know what a stock 1.6L 3rd gen protege puts out whp?

 

[tonkabui]

why is there such a great variation between your expected result and your actual result? and what kind of dyno are you on? i know the mustang dyno is good for tuning and is most accurate since it takes into account load, so perhaps if you were on a mustang type dyno, it will explain the low figures.

 

[twilightprotege]

it was a dyno dynamics, but i believe that there are two types of dyno dynamics dyno. a 0-400whp and a 200+whp machine. the 200+ machine is very tough under 200whp, so i am thinking that it was a 200+ machine

 

[akhilleus]

I think there are some other issues involved here, but definately the dyno used has something to do with it.

 

[twilightprotege]

intake cam reworking is almost definately the next job...

 

[akhilleus]

interesting... keep us informed.

 

[twilightprotege]

will also investigate less restrictive resonators as well once i have a couple more mods too

 

[mp5jeff]

you didn't go back to the same dyno?

 

[Gen1GT]

I agree. You CAN'T compare figures on two different dynos. You can't make assumptions on what the cars are supposed to be making either. You don't know the state of tune of that 1.6 and the Miata. They could be running like s***. Miatas have a lot of drivetrain loss too remember. Most 1.8 Miatas baseline 100-105. 1.6 Miatas baseline 85-90. A 1.6 has 105 flywheel hp, which is good for around 85-90whp too.

But still, those numbers all do seem low. You should go back to the dyno you started on though.

 

[Installshield 2]

I agree as well...Also a dyno can be calibrated to show whatever numbers you want it too...its the before and after numbers that are important... A stock car could throw down 150whp, and then 170whp after some mods...If the operator wanted to, he could raise both by 500whp...wouldn't mean a thing...You just have to make sure everything is staying consistant..

Andy, you definately need to get back to the original dyno...That is the only true way to see what kind of gains you have progressed to...it may be that your new calculations are dead on, but there is no way to know for sure...Great work though, and keep it coming...

 

[twilightprotege]

i will be ringing the original place today and see if they can fit me in saturday morning. atleast that way i can compare.

 

[Installshield 2]

exactly man...Its clear you got some excellent gains overall....But its difficult to tell to what degree at this point...

 

[twilightprotege]

booked in for saturday morning 730am.

a couple of guys i know will be opening an import performance shop shortly so as soon as they do i will get another dyno run there so i have a base on their dyno and compare it to the dyno i'll get this saturday and i'll go there to the new place from then on.

 

[Gen1GT]

booked in for saturday morning 730am.

a couple of guys i know will be opening an import performance shop shortly so as soon as they do i will get another dyno run there so i have a base on their dyno and compare it to the dyno i'll get this saturday and i'll go there to the new place from then on.

Good idea. Good luck with your numbers too. You're lucky to have the OBDI advantage (yippy)

 

[stdntDrvr]

*post to stay updated*

 

[twilightprotege]

^ consider it done!

 

[twilightprotege]

back from this morning's dyno run.

the figure. 123.7whp

the problem. resonators & intake cam. they are the next to change w/o doubt.

resonators are the big problem. i got slightly restrictive resonators to keep down the volume, but didnt get very good ones (didnt find out until i gave them to the exhaust guy). anyway, i will get them changed to unstrictive resonators very soon.

the good news - power everywhere. almost completely straight power line from the start of the curve to redline. the dyno guy was very impressed!

 

[aussie_nate]

the good news - power everywhere. almost completely straight power line from the start of the curve to redline. the dyno guy was very impressed!

tell me about it you do any more to that car and i will never keep up with you hehehe

 

[Gen1GT]

Awesome man! You officially lead the NA hp race. What mods are next in line?