ping on topend

[fivemustangs]

Last year I had my procharged 02 GT tuned by someone who should be no were near a dyno, he got a whopping 315WHP on a mustang dyno with my set up which i will list below. When I went to the 1/8 mile track the day before I put my car up, I noticed there was a small amout of engine knocking at the top end on the RPMs. So my question is, will this greatly effect my engine and reduce its life when I get someome else to retune my car? It wasn't very long or a hard sounding ping, but it WAS there , are my pistons on the way out because of this? everything seemed fine exept for mashing the throttle, no loss of power or smoking of the engine. I plan on getting a tune this spring from performance dyno in new hampshire, anyone had good/bad experences with them?

drivetrain MODS-

Borla catback
BBK shortys
trickflow plenium
ford racing 70mm TB
4:30 gears
42lb injectors
focus 255 pump
KB boost-a-pump
SCT Big Air
Aluminum driveshaft
intercooled procharger 10lbs

 

[slayerripkdc]

What kind of fuel are you running?

 

[BurningRubber]

Yes, it's very harmful for the engine to experience that. Especially true when you're boosting it or using nitrous. If it was minor as you described, and not for a long period and you saw no ill effects, then you're probably alright.

I honestly wouldn't want to drive the car if he squeezed that little of power out of it and it's pinging. If you don't have an alternative mode of transportation, then I'd highly suggest staying out of boost until you can get it re-tuned.

Fuel is obviously an important issue, but it seems like you have a setup that would support 10lbs of boost as long as you're running 93 octane, or 91 octane if that's all you can get (as long as it's tuned accordingly). Unless you are having a fuel delivery issue, it's probably a matter of too much wide open throttle timing.

You could pull your spark plugs and see how they look. If they are beat up (white (running lean), closed gap, excess deposits, physically damaged, melted, etc.) then you may be looking at something more serious)

 

[trinity_gt]

Definitely stay out of boost until you get the detonation issue sorted.

The car needs a tune by a person experience with stock-internal blown 2Vs. This generally means being conservative on the fuel (i.e. fat) and timing (i.e. retarded). The tune should really be performed on a load-bearing dyno with a wideband AFR -- checking the exhaust stream before any catalytic converters -- and logging to verify timing across the RPM and load range. It should also take into account the fuel you'll be running (e.g. 91 octane?)

Your fueling combo sounds solid but you may want to get a fuel pressure gauge on the rail to verify no issues there.

 

[fivemustangs]

I did have it filled with 91 octane when it started to make the noise, I have only had problems with this tuner, he lives in in the middle of no were and has a dyno......But he is the only tuner within 5 hours of me. But I know for a fact that it will be WELL worth the trip to New Hampshire for a better tune. I also plane on buying a Anderson Pipe and a procharger race valve when taxes come back! After the issue I did keep it under boost the way home from the track, and it will def. be trailered this spring to its tuning location, and I will take a look at the plugs when I take it from storage.
Thanks for the help! Also anyone here from maine?