disappointing dyno nubers....

[eclipsegsx97979]

just got back from pruven performance and im alittle disappointed because it only ran 283.1 hp to the wheels... i was hoping to break into the 300's... they said its fully tuned correctly now but that there might be some restriction somewhere or a boost leak or something... so i dunno what to do now but i guess thats decent hp prob like 375hp to the crank.... also does anyone know about red coolant because theres red coolant in my car and i just noticed it..... i thought coolant was only green...


kevin

p.s. also forgot to mention that when they were dyno tuning it and adjusted it from 15 psi to 20 psi there was no difference in performance still 283.1 awhp wether its 15 psi or 20 psi which is kinda weird.... any idea what this could mean? could it be my boost controller? its a $35 ebay special.... or maybe a boost leak or something?

 

[Eclipsei95cl]

What turbo are you running???? You dont have any turbo listed in your profile. So your on a T-25 then??..If you made 283 hp on a t25 that is like a record.

 

[eclipsegsx97979]

i have a bullseye garrett t3/t4 50 trim turbo, 650cc injectors, 255 hp fuel pump, safc II, greddy fmic and upper and loer piping, ebay boost controller, full turbo intake, apexi 3" turbo back exhaust with no cats, plugs, wires, act 2600 lbs clutch and street disc, new timing belt and other belts.... i dunno what else.... should i get a different boost controller or what? i should def be putting more then 283.1 to all 4 wheels.... im disappointed and dont know whats wrong....

 

[andymoraitis]

just got back from pruven performance and im alittle disappointed because it only ran 283.1 hp to the wheels... i was hoping to break into the 300's... they said its fully tuned correctly now but that there might be some restriction somewhere or a boost leak or something... so i dunno what to do now but i guess thats decent hp prob like 375hp to the crank.... also does anyone know about red coolant because theres red coolant in my car and i just noticed it..... i thought coolant was only green...


kevin

p.s. also forgot to mention that when they were dyno tuning it and adjusted it from 15 psi to 20 psi there was no difference in performance still 283.1 awhp wether its 15 psi or 20 psi which is kinda weird.... any idea what this could mean? could it be my boost controller? its a $35 ebay special.... or maybe a boost leak or something?

When a motor doesn't make any more horsepower after the boost has been turned up, it generally means that it's running very rich and not able to burn everything that's being thrown into the cylinders. I would check for a boost leak, which they could have done there since that will cause a rich condition. Do you have an AFPR on your 255? If not, that isn't helping.

I hate to burst the bubble, but 283 to the wheels is NOT 375 in the motor. 375 in the motor is about 318-320 to the wheels. Also, you might want to update your profile as well so we can help you better.

Let us know what you find,

Andy

 

[eclipsegsx97979]

first of all you lose 30% to the wheels on an awd application so that would give me about 368.3 to the crank.... i do have a fuel pressure regulator.... when i brought it to pruven they tuned it too... it only was putting 250 to the wheels until they adjusted the a/f a bit. i also have 650cc injectors and a safcII and many more things.... im hoping its just a boost leak but i sont know how to check for it... if no then it might be a compression prob or something...


kevin

 

[CanadianTSi]

first of all you lose 30% to the wheels on an awd application

30% is kinda high, most people say 20...

 

[byondevl]

20-22% for a manual, 22-25 for an at 2nd gen

 

[andymoraitis]

You can make a boost leak tester by going to http://www.vfaq.com. It's in the intake section of the FAQ locator towards the bottom of the page.

Good luck!

Andy

 

[Steve93Talon]

Something's definitely not right. Why are you tuning for such low boost anyway? Did they read A/F ratio during the pull? Did you run a datalogger? Any more info would be helpful.

 

[eclipsegsx97979]

what u mean low boost? they did a dyno tune....

 

[Hammer_Gaidin]

For a 50 trim i'd be running like 18-20psi street maybe 25 race..

 

[eclipsegsx97979]

im running 20 psi

 

[THE_ARTIST_]

i would think a boost leak is the cause of you low HP numbers

 

[4G63 GST]

Have you eliminated anything from your car .. ie EVAP .. EGR .. ect?

Any compression numbers?

Luke

 

[DSM90AWD]

I also recently went to the dyno having the same issue with low HP.

My HP from 18psi and 22psi on 50-trim was the same (~286 WHP). Though looking at my datalogs I saw that on the 22psi run I was getting mad knock and timing was down to 10-11deg by then end

My assumption is that since this Dyno didn't have a very efficient cooling fan (big box unit 10' from the car) my "small" FMIC I was likely heat soaking by 5K RPMs => knock => pulled timing => low AFRs (i.e. running rich due to low timing).

As subsequent runs were me removing more fuel to bring the AFRs' back to ~11.5 I was just making things worse. I also didn't cool down for more than a few mins btw runs which I'm sure also hurt, but I was just looking to get a baseline tune on a new setup.

On the road with a steady flow of cooling air I get no knock on 3rd gear pulls and car definitely feels stronger than it did on the Dyno