Terry Posten
Well-known member
Most of you know that I have spent the last 3 years rebuilding my Summit White 1992 GVR4. This rebuild literally has included everything from the chassis all the way to a full drivetrain upgrade.
The only thing left is to rebuild the driveshaft and bolt on the strut tower braces(front and rear).
The final step is to dyno tune the ECMLink V3 speed density setup. That saga started 1 week ago today. I spent about 2 hours on the dyno only to be told that they could not continue due to the engine temps. The motor just would not cool far enough between pulls to keep knock away.
The final result of the first day was that the off-boost and mid-boost was finished but we must go back to do the hi-boost tuning after the cooling issue is resolved.
The first results were 316whp and 310tq at 13 psi (spring pressure of the waste gate) on 93 octane Shell.
Since the dyno day, I have ripped the front of the car apart and rebuilt it (again) with a new 1G style radiator, 160 degree t-stat, new 12" dual fans, 160 degree thermo switch, and new hot-side piping (to make room for the new radiator).
The before engine temps varied from 210 to 220 cruising around and not really falling when coasting or idling and now I see 170 to 180 cruising/boosting and falling to 160 coasting and idling. And that was today with outside temps in the 90s with super high humidity.
Here is the new radiator setup.
Here are some new pics of the speed density setup:
Just for you guys that don't remember what a stock(ish) engine bay looks like, this is what I started with about 6 years ago:
I will post up the final results (with graphs) when I get her back on the dyno. The return trip is already paid for and should be mid next week. First I have to do some more shakedown cruises to make sure I don't have any more mishaps.
The only thing left is to rebuild the driveshaft and bolt on the strut tower braces(front and rear).
The final step is to dyno tune the ECMLink V3 speed density setup. That saga started 1 week ago today. I spent about 2 hours on the dyno only to be told that they could not continue due to the engine temps. The motor just would not cool far enough between pulls to keep knock away.
The final result of the first day was that the off-boost and mid-boost was finished but we must go back to do the hi-boost tuning after the cooling issue is resolved.
The first results were 316whp and 310tq at 13 psi (spring pressure of the waste gate) on 93 octane Shell.
Since the dyno day, I have ripped the front of the car apart and rebuilt it (again) with a new 1G style radiator, 160 degree t-stat, new 12" dual fans, 160 degree thermo switch, and new hot-side piping (to make room for the new radiator).
The before engine temps varied from 210 to 220 cruising around and not really falling when coasting or idling and now I see 170 to 180 cruising/boosting and falling to 160 coasting and idling. And that was today with outside temps in the 90s with super high humidity.
Here is the new radiator setup.
Here are some new pics of the speed density setup:
Just for you guys that don't remember what a stock(ish) engine bay looks like, this is what I started with about 6 years ago:
I will post up the final results (with graphs) when I get her back on the dyno. The return trip is already paid for and should be mid next week. First I have to do some more shakedown cruises to make sure I don't have any more mishaps.
