EvilRufusKay Posted August 29, 2003 Share Posted August 29, 2003 I was wondering if anyone has opinions on the various aftermarket EFI systems on the market. Both Holly and Edlebrock seem competitivly priced but I have not seen many reviews. I am sure there are also a bunch of other systems I do not know about. Any ideas? Thanks! Quote Link to comment Share on other sites More sharing options...
Guest greimann Posted August 29, 2003 Share Posted August 29, 2003 I think the Holley system would be a good choice. You will need a laptop to program it, but the flexibility is infinite. The Edelbrock system is simpler and doesn't require a laptop so tuning may be less flexible, but on a mild motor should work fine. When you start getting into lumpy cams that need open loop idle, the Edelbrock system may not offer that. Check it out. Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted August 29, 2003 Share Posted August 29, 2003 I have the Edelbrock pro-flow EFI. I like it, it works great! It's completely adjustable, and has it's own module , no laptop. Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted August 31, 2003 Author Share Posted August 31, 2003 Describe open loop idle please. Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted August 31, 2003 Author Share Posted August 31, 2003 One of the main reasons I am considering EFI is I am sick (literally) of/from inhaling rich exaust fumes. No matter what I do; adjust the carb, change the timing, or both. I still get smogged out. When I drive my car to work I bring my work (monkey) clothes with me so I don't smell it all day. Any help on this one guys? I mean before I shell out the $2500 for EFI. I have an older 650 cfm Edlebrock. Do I rebuild? Buy new? I would rather not spend money on fuel delivery when I am thinking of upgrading. Thanks again! Quote Link to comment Share on other sites More sharing options...
Tim240z Posted August 31, 2003 Share Posted August 31, 2003 Try redirecting your exhaust outlet and see if it solves the fume problem. Go to the parts store and buy a cheap 90* bend and just clamp it temporarily on your tailpipe so that it points towards the outside of the car. I did that on my old 240 that had twin webers. I adjusted the webers as close as I possibly could, but the fumes still sucked into the hatch. Put on the 90* tip and it completely solved the problem. If it works, go to the exhaust shop and figure out a permanent solution. If that's the only reason that you're buying a FI system, this will be a much cheaper way out. Tim Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted August 31, 2003 Author Share Posted August 31, 2003 My exaust is all the way to the back with the standard 45° down angle so I am not sure if I understand. Are you saying take the 90° and point it upward? Or to one of the sides? Quote Link to comment Share on other sites More sharing options...
Tim240z Posted August 31, 2003 Share Posted August 31, 2003 towards the side of the car (so it's the same direction as your wheel studs) so that the low pressure that forms behind the car doesn't 'push' the fumes into the hatch. Quote Link to comment Share on other sites More sharing options...
EvilRufusKay Posted August 31, 2003 Author Share Posted August 31, 2003 Interseting, and definately worth a try thanks! Quote Link to comment Share on other sites More sharing options...
Guest greimann Posted September 1, 2003 Share Posted September 1, 2003 Describe open loop idle please. In general terms, open loop is when the EFI system functions WITHOUT correcting the mixture using the O2 sensor feedback. Closed loop is when the O2 sensor IS used in the fuel mixture trim. EFI fuel curves are typicallly a little rich so the engine will safely run should the O2 sensor fail. An engine that has a cam with a lot overlap, will not idle properly using closed loop O2 fuel trim. These cams need to have a very rich idle mixture and the O2 sensor in closed loop will just keeps trying to dial the fuel back to stoich. Once the RPM's come up, O2 feedback works fine on these cams, so an EFI system needs to have the control flexibility to be in open loop at idle and go closed loop in cruise. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.