HP, how much can a LIL 2.5L take? How do they Blow?

[pk2]

Originally Posted by Topless

PK,

If you want to continue to develop this motor why not tune it like the pros. Take it out to Willow Springs, bolt on some instrumentation and push it around a bit. After a few runs download the data to a laptop and take a look.

I certainly do appreciate your input and am flattered by your interest (or is it a fascination with impending train wrecks?). I may sound like a contrarian twit, but I really just have a need to know, the nuts & molecules of an issue when I want to do something clever and cool. Generalities or conventional wisdom (which may or may not be well founded in the first place), doesn’t do it for me. Little at face value ever does.


As far as taking it out to Willow, I intend to do just that (or the like). I’m not sure what a “pro” would hang on the car. My somewhat foggy intent was:

A Laptop:

Wideband A/F with a PC interface & software.

OBD II/ laptop software setup (parses OBDII signals into a ton of output with data logging).

My AIC hooked up to the PC if for no other reason than to make “on the fly” tweaks. (Don’t know what feedback it might offer in its software)


What would you add or subtract from my proposed morass? (don't say "the car" please)


Thanx, PK

i think the motor can handle that amount of power, Garry seems like hes doing fine.

[pk2]

Originally Posted by blkboxster

i think the motor can handle that amount of power, Garry seems like hes doing fine.

Ya, he seems to be defying conventional wisdom. Wonder how many others are out there.

PK

[Topless]

PK,

As far as instrumentation goes you may want to add a GPS logger or G-timer to get some real world acceleration curves coming out of turns and down the straights. They can match up to the other telemetry data from the car. You may want to talk to Richard at Clewett Engineering in LA. He specializes in engine mgmt. systems for Porsche racing teams. He has more experience with tuning FI Porsche motors than anyone I know. He is far more comfortable at the ragged edge of performance and reliability than I am.

Gary's car is posting some good numbers. 11k miles with a 270hp+/- turbo may be a new record for a 2.5 motor. It's an accomplishment to be proud of. Still a long long way to go to see 200hp/liter though. Now that would really defy conventional wisdom. One step at a time.

[pk2]

Originally Posted by Topless

PK,

... You may want to talk to Richard at Clewett Engineering in LA. He specializes in engine mgmt. systems for Porsche racing teams....
Gary's car is posting some good numbers. 11k miles with a 270hp+/- turbo may be a new record for a 2.5 motor. It's an accomplishment to be proud of. Still a long long way to go to see 200hp/liter though. Now that would really defy conventional wisdom. One step at a time.

I’ll try to get a hold to Richard, see how talkative he is. ? Engine management is something I get in principle and a bit in practice but I’d like to know a lot more to give this little motor a fighting chance. I don’t suppose he haunts any of these forums?

Gary’s #’s are indeed enviable, especially in the light of the total mileage on the car. Shame nobody’s ponyed up with some aftermarket internals to accommodate the stuff we’re hanging of the outside. I’d like to hit a 150/liter mark and on paper it’s no big feat. But weather the motor can hold itself together long enough to become boring is another story. Wish I knew more about the pratfalls

One step at a time, true. I really need to get what have buttoned down and baselined before I mess with take another step.

Regards, PK