hadleycat

Considering running -8 lines from the rear of the intake to the front to eliminate steam pocket in the rear of the heads. Has anyone ever done this to a 502 Mag MPI Intake? It looks awful tight on the starboard side to drill and tap in the rear of the manifold.

hadleycat

Steam Pocket not Stem Pocket

[QUOTE=hadleycat;4506905]Considering running

buck35

Just curious, what makes think there is an issue? might send a pm to arctic friends as he seems to know as much as anyone about these intakes.

hadleycat

Tulliped a valve in #7. Running a Procharger set up with no thermostat.

mike tkach

iTrader: (3)

i like a small [-3 or -4] line on all siamise blocks but i doubt that the lack of one is the cause of your problem.

Black Baja

iTrader: (2)

Sounds like it needs more fuel. What does the cylinder look like? If I was going to run lines of the back of the intake I would use -4 definitely not -8. But I think you have a problem with your tune-up

hadleycat

Thanks guys wasn't sure if the water lines would help or not. I believe my main problem was I was getting up to around 10 lbs. boost on the stock iron heads. Replacing heads with dart aluminum 325 and see where that puts me.

articfriends

iTrader: (1)

Id like to see how that injector flows compared to the rest , you will prob find your prob there. I have seen severe differences on both used AND new maggeti marelli/fiat style 502/454 injectors. I flow and clean injectors and Im local to you, Smitty

Gimme Fuel

Hadley, I would have Smitty look at your injectors if they haven't been tested in a couple years. Couldn't believe how bad mine were after I roasted a BONE STOCK 502 MPI this summer. Had 4 real bad and 2 more not acceptable. We replaced with Siemens/Deka 63 lb/hr and re-tuned to compensate. Did a quick patch up on the engine and beat the crap out of it rest of the summer.

Black Baja

iTrader: (2)

I see this all the time. Funny thing there is no warning signs that you are losing an injector. Injectors need to be regular maintenance in these magical fuel injected engines.