Hey guys,

Yesterday I did some pump gas tunning at Godspeed on their dynapack AWD dyno while adjusting my GM boost control solenoid (controled by the AEM EMS). Dan was sceptical when I said my goal was 350 on pump gas. As we slowly raised the boost level run after run we passed through 350 HP at 17 psi From there I continued on up to 20 psi and a peak of 375 HP SAE. The uncorrected torque was 302 pretty much flat from 4000RPM to 5500RPM. When you apply SAE correction to the torque you get 320 lb-ft of torque in that range.

This is all with the stock 16G compressor, with titanium exhaust wheel and shaft and a 10.5 hot side housing. I will post up the dyno sheet this Sunday.

Keith

 

I don't know why he was skeptical of 350whp on pump fuel, as there are several of us at that level with the 16G with pump fuel and even cat converters. It's generally accepted that ~380whp (DJ or DP) is about the limit of the 16G on pump, so you're about there.

 

I don't think he personally had seen numbers like that yet on pump gas out of an EVO. He is still getting used to how much better the EVO turbo is stock over the Subaru stock turbo's

Keith

 

I'd like to see a chart of your A/F if possible.

 

I don't have an A/F ratio charte, since I have it all in my AEM EMS data logs. I was running 11:1 all the way from onset of boost till end of pull.

Here is a charte of my new 94 octane vs stock on 94 octane

Keith

 

Very nice

 

nice #'s. What mods?

 

Look forward to getting something like this out of my MR while tuning it with Greddy e-Manegment, while using HKS cams.....

 

Buschur Racing stage 4 plus the AEM EMS, SSAutochrome header and O2 housing, Magnus sheet metal intake manifold, and the upgraded hotside on the turbo.

Keith

 

Why does it say Fly Wheel Power up top?

 

Feel like posting your .Cal file?

 

See at the bottom right hand side where it says "tcf 1.00"? That is a fudge factor you can enter to give you an estimate of flywheel HP based on the wheel HP. When that factor is 1.00 it equals the wheel HP

Keith

PS: A dynapack AWD dyno reads virtually the same as an AWD dynojet without a fudge factor put in. That is one of the reasons I included my stock plot on that graph

 

Great numbers! Anyone care to explain what the 10.5 is and what it does along with titanium exhaust wheel and shaft. What were the benefits seen? cost?

 

10.5 refers to the area of the hotside housing. The factory housing is 9.8cm2. The upgraded hotside (standard on new EVO MRs) is 10.5cm2. This doesn't really change the power potential of the turbo, but gives a bit of a boost power until the compressor wheel runs out of steam.

The larger housing tends to delay spool time just a bit due to the slightly reduced exhaust gas velocity, but the Ti internals weigh less than the Inconel internals of the factory turbo, and thus restores the stock spool characteristics.

The 10.5 hotside housing mod is cheap by itself. Add the Ti internals and the price jumps a bit.