Glowing Exhaust Manifolds 1992 454 TBI 7.4L P30 Motorhome

[Nasty-Z]

And to expand on what I said earlier , when your injectors were flowed , there had to be a pressure they were flow tested at .

We can assume the 510cc was flowed @ 10.5 psi (which is what GM originally flowed the 17084304 at) , but it does no good to assume . If it was in fact flowed @ 10.5 psi 510cc is not enough fuel .

If the injectors were flowed at a lower or higher pressure , flow will be proportionally different. Without a PSI for a given flow rate , the flow rate is useless .

FWIW , the 17084304 was flow rated by GM engineering @ 75 lb/hr @10.5 psi.

From an email message from Walt Sherwin dated 8/25/03:

"17084304 is the stock (1990 - 1993 454) SS injector. The service part number is 17112560. It is rated at 75 lbs/hr of spec fuel, at 10.5 psig differential pressure.

HTH

TOM