Quote:
Originally Posted by puretone
main concern of mine is SAFETY. Hence the Vortec FMU, now it's not the most elegant solution but ALOT of people seem to use them with great results.
My main concern is how the OEM MAF will react to the added pressure & volume, will it just send the 5v continuous @ boost? Or is ours opposite and will it go to 1v @ boost? And I wonder how our OEM ECU's handle such a signal.
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I agree with the items for safety, nothing wrong with going to a walbro, metal headgasket, ect. But he did say he didn't want to open it up, just bolt ons. I haven't had any damage from FMU's either but none of the engines ran near as good on the FMU's. Simply removing it and dropping in the larger injectors made a world of difference. On stock ecu/stock boost of 6psi on jackson racing s/c kits.
The only thing I wasn't agreeing with is the FMU, I'm just recommending using larger/proper size injectors instead.
Yeah, if the flow exceeds the maf capabilities it'll max out a 4.x or 5v. But with that kind of flow you should be able to setup a tune based on rpm & throttle position. when not fully on throttle it should be fine for daily/cruising around. OR, since at that point your running a good standalone/piggy back you can always swap in a larger MAF. (But it should take a lot more air flow than 6psi to max it out - iirc)
Andrew