analyze my dyno

[ozzeran]

Ok just got done dynoing my gst earlier. Here ist he following mods and the best time i've ran at Ennis, you be the judge:

1995 gst
dave brode upper i/c pipe
1g bov
3inch turboback exhaust
and a ebay open air filter
walbro 255lph hi pressure thats all that FP had in stock at time

no boost control nor boost gauge

First run ...all these were basically RIGHT after driving for 15 mins straight in this heat

1st 175hp 204tq
2nd 166hp 186tq
3rd 172hp 192tq
a/f was only charted, hard to read it exactly

run conditions: 98degrees, 29.40 in-Hg, Humidity 17%, sae: 1.03

3k around 12
4k around 11's
5k middle 10's
6k 10's
7k 10's

that sounds rich to me and explains my 23mpg on last tank versus typical 25-27mpg. I"m guessing it's the Fuel pump over doing my regulator. I'll be replacing that pump with a non hp soon probably. Can anyone give me any tips why my traps are high but my hp isnt? I am getting a boost gauge so I do know that, maybe a egt gauge as well. Oh and of course this is a 5speed.

thanks

best run at ennis with rear seat out, passenger seat out and spare out was a 14.52@99mph.


I had a lot of 99mph trapped runs as well. This was let's say a month or 2 ago. Cant remember.

 

[CanadianTSi]

That's perfectly normal, Infact I would be quite happy with that.

Our cars come rich from the factory and trapping 99mph on the t-25 shows your car is quite healthy.

 

[andymoraitis]

I have to agree with Canadian on this one. I've seen a lot of Big 16's trap at 100 or so (including mine) before they were tuned so running that on a T25 is pretty darn good. Look at it this way, keeping the motor a bit rich is much more safe than running on the ragged edge and taking changes.

By the way, switching to a non HP 255 will do nothing for your condition. I have a 190 and have learned that even these mildly overrun the stock regulator. I'd likely put in a 190 (which can take you into the low 12's easily if you upgrade) or add an AFPR.

Good job and good luck!

Andy

 

[ozzeran]

Umm our cars come from the factory with 210hp, now granted that is with a healthy motor, but i have added these modifications and those numbers are stock levels to me. Also doesnt MPH indicate HP in the 1/4? Stock mph in magazines show it at 91, so i dont see running 99mph with 210 or so flywheel. Remember this is a GST, not a GSX.

 

[Hondahunter_666]

the thing is, those numbers from the factory can't be wheel horsepower. you notice how your dyno runs were only like 170? the stock horsepower is like 150s... and also, the gs-t is always going to trap higher mph than a GSX will because the gsx doesn't have the upper end that the gs-t does. I trap at like 103 while my friend with a gsx traps at 101 yet he runs more than a half second faster than me.

 

[CyberEye]

leave the 255hp in there, and just get an AFRP. An SAFC would be quite helpfull to. Also what in the crap are you doing modding ANYTHING on your car without putting a boost gauge in first???

 

[ozzeran]

ok i'm gonna stop looking on this site. 210hp FLYWHEEL x 14 or 15% drivetrain loss=178-180whp. I know every car is different but not this bad. And i'm sure a full 3inch turboback with hard intercooler pipe with a 1g bov and open air filter yields more than stock HP levels. Especially when I can run a 99mph trapspeed.

 

[92awddsm]

ok i'm gonna stop looking on this site. 210hp FLYWHEEL x 14 or 15% drivetrain loss=178-180whp. I know every car is different but not this bad. And i'm sure a full 3inch turboback with hard intercooler pipe with a 1g bov and open air filter yields more than stock HP levels. Especially when I can run a 99mph trapspeed.

A t25 at stock boost levels is not going to make a whole lot of power even with bolt ons like you have. Get a boost gauge on there and Im sure you will see that it is only pushing 10-11 psi and probably falling off in upper rps. What do you expect it to do? You might have realistically picked up 10-15 hp with your bolt ons but you wont ever see the potential they have untill you turn the boost up a little or upgrade to a turbo that is capable of making good power at low boost levels.

 

[ozzeran]

A t25 at stock boost levels is not going to make a whole lot of power even with bolt ons like you have. Get a boost gauge on there and Im sure you will see that it is only pushing 10-11 psi and probably falling off in upper rps. What do you expect it to do? You might have realistically picked up 10-15 hp with your bolt ons but you wont ever see the potential they have untill you turn the boost up a little or upgrade to a turbo that is capable of making good power at low boost levels.

with my boost gauge and mbc on there b4 i ditched them was reading 16psi and dropping to 14 to 15psi.



either way HP is trap speeds, 99mph isnt 210hp flywheel, it's more like 250 ish.

 

[tstkl]

the way i see it you didnt really do any major upgrade aside from the exaust, the fuel pump will show you no gains, nor will the 1g bov, and unless you start flowing more air, opening up the upper intercooler pipe will only lower intake temps by a slight amount and give you a small amount of hp.... you opened it up some with the air filter, but have you looked at the stock maf? with the silencer still in there (im guessing you still have it in there) opening the filter up wont help that much.... as for 15% drivetrain loss, good luck with that, do you have any idea how much the drivetrain parts weigh? its closer to 20%, even with a manual fwd car....

altho no one knows for sure so it doesnt really matter, we can argue all we want, but 180 whp for a almost stock 10 year old car that from the factory saw 170-180 whp.... dont complain...

 

[92awddsm]

with my boost gauge and mbc on there b4 i ditched them was reading 16psi and dropping to 14 to 15psi.



either way HP is trap speeds, 99mph isnt 210hp flywheel, it's more like 250 ish.

Alright, have you done a timing belt recently? I would recheck timing marks and make sure they all line up. Generally, your hp readings are going to be higher than the torque.

What kind of dyno did you run on. Different dynos will also give you different readings.

What was the air temp on dyno day compared to the day you ran the car?

There are so many variables that could have changed but since you know what your horsepower should be, Im sure you know everything else also. Why even come on here and ask a question if you want to argue with everyones reply? Oh well, doesnt matter to me because its not my car and I dont have these issues.

 

[SpoolinV8ETR]

mabey you spun off the line? if you do that you will have a higher trap then what you should if you got good traction.

 

[92awddsm]

with my boost gauge and mbc on there b4 i ditched them was reading 16psi and dropping to 14 to 15psi.



either way HP is trap speeds, 99mph isnt 210hp flywheel, it's more like 250 ish.

HP doesnt dictate trap speeds, its a combination of hp and vehicle weight. Im sure with 180 whp and removed the seats, 99-100 mph wouldnt be hard to accomplish.

 

[ozzeran]

Damn ok, guess i am dumb about this. Timing belt was done close to about a year ago. I'll still take a picture of the dyno sheet when I get a chance and see what you think. I wheel hopped rather than spun really on those times.

 

[punishercb]

Just wondering, why did you take off your boost gauge and MBC? That's takin a big risk when you're modding and not seeing what pressure you're running. Plus, I just put on my 1G BOV and MBC and damn did I feel a difference. I mean HUGE. You should def. put that back on and I doubt you'll be complaining about low horsepower again.

 

[ozzeran]

Just wondering, why did you take off your boost gauge and MBC? That's takin a big risk when you're modding and not seeing what pressure you're running. Plus, I just put on my 1G BOV and MBC and damn did I feel a difference. I mean HUGE. You should def. put that back on and I doubt you'll be complaining about low horsepower again.

I had mixed feelings about the car at the time and decided to put everything back to stock and just deal with what it had from the factory so I could build a dedicated track car. I'll be buying another mbc and gauge soon.

 

[ozzeran]

Ok here is a link to my dyno sheet. Please excuse the bad quality, the camera is a 1megapixel dinosaur that has been dropped a few times


http://pg.photos.yahoo.com/ph/sporter1978/album?.dir=/b988

 

[CanadianTSi]

All Dyno's read different, some read low some read high. 99 mph means that you are making power.

My car dyno'ed less than 270whp yet trapped almost 111mph. Dyno numbers mean squat.

 

[tstkl]

Dyno numbers mean squat.

whats funny, is that you can find someone who will say that about anything...

trap numbers mean squat, mod lists mean squat, 1/8 traps mean squat, 1/4 time means squat....

when it comes down to it, they all mean something, you just dont understand what, and even if you did, analizing each individual occasion is to hard to do.....

 

[speedy13]

exactly,there are so many variables that after you have gathered all that info, you can get an idea of what your car is running at,but never is exact or twice the same.Dybo's are good for tunning or to take out your curiosity,but it doesn't mean that if you have 500hp youre gonna be instanly runnig 11's.

P.S. the butt dyno rules!!!

 

[ozzeran]

exactly,there are so many variables that after you have gathered all that info, you can get an idea of what your car is running at,but never is exact or twice the same.Dybo's are good for tunning or to take out your curiosity,but it doesn't mean that if you have 500hp youre gonna be instanly runnig 11's.

P.S. the butt dyno rules!!!

hehe, well the butt dyno feels good then