All that was done to the intake was extrude hone?

How big did you bore the throttles out?

That would be plenty for my 32,,,,,, I mean 27 fountain

Qstat is static flow, Qdyn was flow w at 2.5/10 ms pulse width. This was Bosch terminology. I don’t see any aftermarket companies showing dynamic flow.

The only time it would matter is when you’re trying to come up with a direct injector swap with out tuning.

which is kind of my point. lots of people dont know or dont have the ability to tune and are just putting in new injectors based off of advertising. those of use who build engines and/or understand them know the pit falls but most dont. seems to me that if they all listed the flow at x ms pulse width and psi you would have a better idea of compatibility. I am not that versed in injectors as most of what I deal with are old cars and carbs or big power and carbs. on my '60 caddy that I put an LS into I just bought new delco injectors that are the same part number as I took out since it does not have any mods. I looked at lots of injectors but did not feel comfortable that they would perform the same as the originals.

I’m so impressed thanks for sharing Smitty. Even an old guy like myself never stops learning. I had no idea until I read your threads. Priceless 😀

Intake runners were cut down 1/2 to 3/4 inch, runners extrude honed, plenum ground out to meet the bigger tb. I been cutting the runners down 2, 21/2" , hand blending and port matching/touching up the ports where I can reach to get these mpis to pull 200 to 400 more rpms (tallking good heads, cam, exhaust, tb, etc) BUT I have yet to come anywhere close to the torque this motor made NA with a mpi. So time to digest the details of THIS build for future builds. It fell off a cliff after 5600 but with the power it made, who ncares This was also tuned on 89 octane fwiw, Smitty

Good info thank you. I remember you saying you wanted to play around with the stock (sort of) intakes. Those results were on a MPI correct not a HP500EFI intake?

It's concerning to me how much I read about injectors that are new and not up to par and or the spec that they are advertised to be. Seems like a lot of poor quality junk out there too. I guess it would be a good idea to have new injectors tested always before installation.

502 mpi intake, I been playing with them for almost 18 years, made 1100 +hp with one at one point, never made 700 ft lbs of tq w one na though till now

these 42 lb Lucas injectors were OK, they just had way different charteristics then 36 lb stock, 12% more static and 50, 60 % more in lower ms test.
I test every set of injectors I sell and have tested quite a few oem replacements thru the years

Much more simple question here if you dont mind!!!!
how to remove and re install an injector on a motor? Simply pull hard enough till it pops out?
any seal / rubber/ oring mandatory to change before putting it back in?