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Had My Car Dyno Tested

shaunvlc

By shaunvlc,
in Engines & Forced Induction

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shaunvlc Enthusiast

shaunvlc

Posted
Posted

Had my car do a power run on a dyno yesterday, was free so thought why not. However the dyno sheet had a steavy curve upwards but then hit a flat spot and literally was a straight line and then back up, it sounded like it was running excessively rich as well at that point in time (almost sounded like it was bogging down).

The dyno print out gave me 240hp at the wheels and the AFR's were at around 14-15 when boosting. the highest they reached were 15.25. which from what i understand is fairly high.

The mods i have are as follows:

FMIC

10 Psi Boost

Pod

3.5" exhaust turbo back

just the basics.

I know without a decent a/m computer there is not much i can do however i would like some feedback from some of the more knowledged users such as r31 nismoid etc.

Just want a straight forward answer on how to fix these problems and have my car running close to 300hp at the wheels.

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https://www.sau.com.au/forums/topic/265910-had-my-car-dyno-tested/
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The Mafia Grand Master

The Mafia

Posted
Posted

if you are hitting 14-15 afrs when on boost \ full load, please stop driving the car and fix whatever the problem is.

If you don't, you're engine is going to go bang, and very VERY soon.

They should be below 12:1 for safe operation under full load.

You may have a stuffed fuel pump.

cmoney Proficient

cmoney

Posted
Posted (edited)

+1 on stuffed fuel pump. Exactly the problem i had with mine....stuffed AFM didnt help either when the aftermarket piggyback ECU was pulled out, cos all of a sudden the car was playing up, but before that fuel pump was dead from 4000rpm on, & i hit over 15 for the AFR on the dyno print out as well. As soon as i had a new pump, AFR was around 12 & very happy :blink:

Suddenly made another 20kw at the wheels, even after dropping boost by 5psi.

Edited by cmoney

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