Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 400 tbi problems
View Single Post
  #6 (permalink)  
Old 03-29-2013, 05:43 PM
joe_padavano joe_padavano is offline
Registered User
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 4,724
Wiki Edits: 1

Thanks: 23
Thanked 414 Times in 369 Posts
Originally Posted by Matty8 View Post
So if I can use those injectors without changing the ECM?
They'd probably get you close enough.

What about tweaking the fuel pressure regulator?
Actually, if you can get enough flow through the stock injectors by raising the pressure, yes that also works. The whole issue is to get enough fuel into the engine to match the larger displacement. There are three ways to do that: Increase the amount of time the injector is open (that's a PROM change), increase the flow rate of the injector, or increase the fuel pressure. I don't know what the flow rates of TBI injectors are at higher than stock fuel pressure, but I'm sure that info is available. There's also a limit to how high you can to with those injectors. I think its around 16 psi or so.
Reply With Quote