1st run on the dyno.....what is wrong with my car???

[96mustang_james]

ok, here is the deal, i went to a new place called dyno-might performance today and had my car put on the dyno and i am very dissapointed with my results.

The tests was done on a mustang dyno.
tests were done with all of the things in my sig except for nitrous.

my first test run was without the diablo chip, the car was at 16* on my steeda timing adjuster, my fuel pressure at about 32psi with the vac line hooked up.
i only put down:
MAX HP: 237.0 @ 5250RPM
MAX TORQUE: 260.7 @ 4250RPM

this is how the first run broke down, sorry i dont have a camera to show the sheets:

RPM-------MAX HP--MAX TQ---A/F RATIO

3458.96---159.09---209.81---13.14
3694.60---166.97---215.08---13.27
3924.25---174.84---220.36---13.40
4156.89---182.72---225.63---13.53
4389.53---190.59---230.90---13.66
4622.17---198.47---236.18---13.79
4854.81---206.34---241.45---13.91
5087.45---214.22---246.72---14.04
5320.09---222.10---252.00---14.17
5552.73---229.97---257.27---14.30
5785.37---237.85---262.54---14.43


2nd run i undone my neg battery cable and i put my diablo chip in, then hooked it back up and set my timing adjuster to 12* and lost about 13 HP and like 25TQ

third run i took the chip back out, set the timing adjuster to 16* and the tech told me to also turn up the fuel pressure 2LBS and i put down:
231.6hp @ 5500rpm
254.8tq @ 4250rpm

he said that my car actually impressed him and i asked him why and then he showed me the dyno results from a few days ago in lots better conditions of a 01GT that only had a k&n, an offroad H-pipe, and flows and it only put down 171hp and 212tq. he also said that his dyno was consistantly 40-60hp less than the dynojet in richardson tx at kwik car.

am i in need of a tune or something? should i be happy with these results?

 

[Turbo92PGT]

Looks pretty good to me. When you turned the fuel pressure down... did you reset your timing adjuster to 16*??

 

[96mustang_james]

Looks pretty good to me. When you turned the fuel pressure down... did you reset your timing adjuster to 16*??

yes i did, and on the third run when i took out the chip i didn't turn the pressure down, i turned it up from 32 to about 34-35psi.

i just thought i would be putting down at least 250 hp, it kinda sucks that i got this much time and money in this car and all it puts down is 237hp!

 

[GotMustangs]

That's what ya get for putting her on a Mustang dyno . Those things are ego killers.

 

[CottonBurnerz]

This might be an off topic Q's but how much does exhaust leak hurt on the dyno?

 

[snoopy98]

what

01GT that only had a k&n, an offroad H-pipe, and flows and it only put down 171hp and 212tq. he also said that his dyno was consistantly 40-60hp less than the dynojet in richardson tx at kwik car.


what the hell was wrong with that gt 01 with 171 hp was it running on 7 cylinders their is either some thing wrong with that gt or the dyno really needs to be calibrated bad.

 

[david l gary]

Hp?


The numbers do seem off. The dyno did show you your best tune though. Use it as a linear chart. How does your car perform? Numbers are just numbers. Mine only made 211 hp and 290 ft lb tq at Dallas mustang. I out run alot of big number cars though. Make the combination work together.

 

[stangman]

don't feel bad man. i had mine dyno'd bone stock on a mustang dyno & got 215 hp & 237 tq. mustang dyno's are known for dynoing lower because they use your cars weight as the starting point for the dyno's inertia, as where a dynojet has a set one. which in the dynojet having a set one, it will actually give you a inflated number the mustang dyno is more of a tuning tool, because its more acurate. if ya want numbers always go to a dynojet

 

[96mustang_james]

The numbers do seem off. The dyno did show you your best tune though. Use it as a linear chart. How does your car perform? Numbers are just numbers. Mine only made 211 hp and 290 ft lb tq at Dallas mustang. I out run alot of big number cars though. Make the combination work together.

the car seems to perform very well, seeing as i got a 13.65 @ 104.13mph in crappy conditions(hot, humid, and spinning through 1st, 2nd, and a little through third gear on crappy good year street tires and 3.55 gears)

 

[GoBabyVroommm]

I personally never got on a dyno but from what my friends tell me a gear can throw off the dyno alittle and give you less rwhp. I would think he would get more then 237rwhp with his site up.

 

[snoopy98]

i want

to dyno mar car one day soon

 

[96mustang_james]

I personally never got on a dyno but from what my friends tell me a gear can throw off the dyno alittle and give you less rwhp. I would think he would get more then 237rwhp with his site up.

i heard something like that also.

 

[snoopy98]

yeah

i agree i heard the same thing dyno jet rule !!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[el_kid_1]

Is it my that don't know a thing about A/F ratios or is your car running lean? Mine is @ 13.5:1 and the tech said that is very lean. Could someone enlighten me here on the A/F ratios? What is the optimum A/F for a supecharged car and for a N/A car?

 

[96mustang_james]

Is it my that don't know a thing about A/F ratios or is your car running lean? Mine is @ 13.5:1 and the tech said that is very lean. Could someone enlighten me here on the A/F ratios? What is the optimum A/F for a supecharged car and for a N/A car?

i would also like to know about optimal N/A and nitrous A/F ratios .