2.4 dyno results

[jydog]

turbo
60 trim T04E compressor in a buick GN compressor housing,
stage 3 exhaust wheel in a .63 A/R housing. Internal wastegate

block
1985 Galant, Wiseco .020 over 8.8-1 pistons,stock rods and bolts.

head
stock 1G with a mild bowl clean up, HKS 264 intake and exhaust cams,
cometic mls head gasket

Fuel
Maf translator,3"GM MAS,880 injectors,255lph fuel pump,AFPR

exhaust
3" no cat.

There was no A/F reading on this pass because he forgot to turn it back on.
The head gasket was starting to push coolant into the overflow bottle under boost,
so it was not in the best shape. Engine has about 8000 miles on it.
In case the chart does not come out clear enough to read, the numbers were
426hp and 433tq. Boost was 25.5 psi.

 

[Blk_99gst]

Nice. When do you see full boost with the 2.4l engine and the 60trim? Maybe at 3500rpm or below, since you have the maft which reduces spool up even more with bigger turbos.

 

[DSM mechanix]

Race gas, I take it? Did you make any runs on boost levels acceptable for pump?

 

[NewB2dsm]

Sounds good but whats with the big dip in power/torque around what looks to me 3700?

 

[jydog]

I normally run approx 23psi with at least 100 octane gas, it will hit this boost level by 3200 rpm in 4th gear.

I usually have at least 100 octane gas in the tank ( except on cross country trips ) so I didn't make any passes at lower boost. Except for one pass at 24psi where it made 415hp and 425tq.

The dip at 3700 was there because it was lean in the midrange and rich on the top end on the previous pass. I made the mistake of turning the midrange knob on the Translator the wrong way and leaned it out even more, which of course made that dip even worse.
There's another dyno day coming up on July 10, I may try again with the new head gasket.

 

[NewB2dsm]

The dip at 3700 was there because it was lean in the midrange and rich on the top end on the previous pass. I made the mistake of turning the midrange knob on the Translator the wrong way and leaned it out even more, which of course made that dip even worse.
There's another dyno day coming up on July 10, I may try again with the new head gasket.

sounds good, I was going to say most of the time when there are dips in the torque its from detenation at least that is what iv been told. But good numbers man, let us know how the next dyno day goes.