Sounds like a nice package. I may have missed it but what did it make with the stock TB?

Reason I'm asking is I'm doing a set of 509" MPI's and it's a budget build...Not sure how much we'll be able to put into it.

Still dynoing, going to test the 56mm throttle body that picked up 12 hp on 540 previously, the 58 mm on it now picked up 9 hp on the 540 na over the 56 mm. Also going to test stock one after that and add stock flame arrestor, wont be surprised if it takes it down to 480hp w both stock pieces

Your distributor and module are in it, I used the harness i bought from you to use as a pattern/template to put my original harnesd back to working order as a previous shop i dynoed at years ago repinned it for mefi4 and it wouldnt function at all, works fine now and im going to sell the virgin one i bought from you now

Think you may have one of my modded throttle bodys. One thing about the mag flame arrestor , they do a suprising job of reducing intake noise. The k&n 9" remote kit will replicate or beat the intake noise reduction ,while still supporting 600 horse or so. The max effort 502mpi blower builds used to run 2 in the bildge.
and they are pretty cheap

I have 3 56 mm bored out throttle bodys that were done locally by lappouttre racing w Kinsler blades that i was trying to sell as a upgrade after seeing 12hp gain on 540 years ago and i have a tpis 58mm that ron krawdad "gimmefuel" traded for a hp 500 throttle bodymaybe from you?

Cool thread, thanks for taking the time to do it!

great job smitty...give you a call soon..Rob

I have a slightly bigger cam in my 502 Mag, run 36 degrees of timing with everything else stock(it only had upgraded valvetrain and exhaust). I see the same speeds of boats that have 500 EFI's in them, now I am wondering what my stock flame arrestor and intake is doing to me. Excited to see the results, these black motors are not to bad afterall!

I also have a MEFI 1 with widebands that I tuned on water, I could send you my files if you wanted to look at them.

Lots of mpi mag motors out there , i have a stock one in a baja 272 that may get a few mods this summer.
We will see if the gas prices stay low

If yours is mefi1 is it a early motor with big screen flame arrestor?