Pro-Pain Testing.

[motorhead]

I did some quicky blasts with the Pro-Pain today. Mostly to ensure its function and setup.

The tests were run with a FMIC, Blue Tops, and a JayC 110 Race chip. Base fuel was 2 month old Ultra 94 and the tank was at 110psi. Turbo Link 4.0 was used to monitor... well that and the helpful eyes of my girlfriend Amy. I was also setting up a bleeder valve... didn't have to touch the WG rod. Propane turn on point was set at 2psi... later raise to about 4psi. No noticeable stumble.

I did 3 progressive short tuning sessions with the car:

12psi w/ 81 jet
15.5psi w/ 86 jet
20psi w/ 86 jet

I am just going to focus on the third run. It was a part throttle jaunt mostly tuning to low end knock retard... aka. street driving levels. Here are the peak stats:

Coolant: 162*
O2Xcnt: 0
Volts: 13.6
Boost: 20psi (TLink shows 14.9, I never calibrated the BST Harness)
Rpm: 3700
Road Speed: Started at 10mph roll, to 40mph. (Not looking for a ticket in Rush Hour, especially w/o a hood)
MAF: 206
BLM: 120
TPS: 3.04V
02: 906mV
LV8: 255#
Retard: 13.1
INT: 128

All and all I was blown away that my engine wasn't blown up @ 20psi on a race chip on aged pump gas. Especially considering my peak boost on 110 last year was 21psi. I have since stuck in the #96 jet... but, yet to test the added flow. I feel, as Jay has suggested, that the extra timing in the 100 chip is the culprit for the retard... I may borrow a street chip from a friend to test the system with lower timing. And hopefully raise the boost. I may drill out the #70 jet to larger than the #96 if the added fuel isn't sufficient, or run a second line T'd off the main line.

FWIW, with the windows down and a tail wind... the propane smell in the exhaust is odd. I am just glad that I am not behind me when I hit the gas.

 

[Nocooler]

Thats a crap load of knock down low!!!

FWIW - I run a Thrasher 108 w/94 and alky and "0" knock (except wheelspin, and at the shifts) @ 22psi. I'd start looking for false knock - and or wheel spin knock.

 

[turbot2112]

hows the weather up their. i had a similar problem my first run and it was from having the propain come on way to soon and from low pressure also.

 

[motorhead]

It has been a warm 10*C up here during the day... I am sure things will pick up once the weather does.

 

[turbot2112]

im sure youll have a lot better results when it gets warmer out. by the way i wasnt busting your balls about the wholesaw. goodluck with the propain
jeff

 

[HurstGN]

Michael,
Yes, lower the timing with a street chip. The high timing of race chips don't respond to the Pro-Pain as well as lower timing/high boost of a street chip.
Dan