2000xp8 said:
It's actually a common mistake people make, especially one on a fox. Dyno fixes nothing. All it does is let you fine tune the fuel pressure and timing. Usually no more than that. The whole tune thing is overrated, a good performance shop can get the same results as a dyno, without the dyno. (5.0's only)
How old are your valve springs, and what lift are they rated for?
I also wouldn't mess with anything else until you get the 42's, i didn't see what size you had, but i'll assume 30's or less, which is not nearly enough.
you might wanna ck that statement, i can ck timing and fuel pressure in my garage-maybe not the timing curve, but most dyno places i've seen/heard about will recommend that you use no more than 42 psi anyway for baseline pulls seeing as that's what most injectors are flow rated at. Dyno runs will not
always fix what you have wrong, but treachery had some small issues that were most certainly related to tuning-hence the trip to the dyno, and the belief that some things could be fixed.
the whole tune thing is overrated? hmmm, ok, tell ya what, go take your car to get a dyno tune, if you've got a fairly decent package of bolt ons, there's a good chance that you could find 20 or more "hidden" hp...that doesn't sound like smoke and mirrors to me-tuning is so that each individual car runs at
its full potential...the fuel and spark tables preprogrammed into the computer don't necessarily fit the needs of every engine...the way your engine is setup is different than mine...so, timing curves and fuel tables need to be adjusted to more closely match the requirements of the engine. still sound like bs to you? you'll be alone...most people i've talked to in here share the opinion that a tune is a necessity if you're running a blown engine, where fuel and spark are MUCH more critical that N/A setups. you could just crank up the pressure and hope it works, and alot of times it does (hence the whole FMU thing)...but not always, even if it keeps the top end fed under acceleration, then your low end is being fed too much fuel since injectors are designed specifically to run at a given pressure, higher pressures mess around a little bit with the flow rates, and fuel delivery.
valve springs are a decent concern, but unless he's running into nasty float, or coil bind, he
should be ok for right now...
i agree to a certain extent about the injectors, but the FMU was designed with purpose in mind...not the best fix for fuel delivery i agree, but if it were that bad an idea, they would've abandoned them long ago...
perhaps you need to do a little more research first, instead of stabbing in the dark and making pompus accusations and assertions of how to make the most from everyone elses toys...their cars are not
your car, different combos have different requirements...
perhaps he's got some gremlins, but to tell a person with a supercharger that a tune would do them no good at all is just a load of
Check your wires out as well
