which FI system?

[dyeager535]

One of the main things that makes me think that MAF would offer superior driveability is the fact that is what alot of new cars come with, and you know that is what they are after, mileage and driveability.

Actually I think most of them use both MAF and MAP, relying on MAP as a backup to failure of the MAF.

Just seems to me that the speed density stuff is older tech, by the time the TBI stuff on our trucks came about, the speed density style injection had been out, in chevy's since 80 or 81 (correct me if Im wrong),

Speaking GM V8, MAF was '85-89, MAP was 90-92. MAP is a more advanced setup when comparing these years. I don't know about the Corvette Crossfire, I suppose that was MAP. Even the CCC stuff from '81-90 used a MAP sensor if I'm not mistaken. The earlier MAF problems have likely been addressed in OBD2 systems, but comparing OBD1 and OBD2 simply isn't fair, there is no comparison, the technology has changed fast.

 

[Burt4x4]

The real fun will be racing RB's GenIII & my 1974 454MPFI up a sand dune in about two weeks.
First Gen POWER!!!
It's AWN!
sequential fire ROCKS!

 

[JimCooper]

This is my first post on this board. I have had limited access for several years, but took the plunge.

With the price of fuel, I am thinking of installing a TBI stand alone on my 81 Jimmy. I am only interested in fuel economy and low end torque. I am still using carbs, Holley Street Avenger right now. Love my Q-Jets though. This part of the BBS has been a great deal of help.

350/350C/208/ 10bolts (2.73)(don't laugh about that part)

Take care,

Jim

 

[bowtiepower00]

It really all depends on how hands on you want to get. You can get any of the systems listed to perform well. I personally have had several TBI trucks and I really like the system for it's simplicity. Holley makes a 670cfm TBI unit. GM offered TBI on 454's and even on a 502 replacement engine. TBI's main downfall, IMO, is that it doesn't like big cams, but that can be said for many of the other systems listed too. I would like to try running one using a mechanical fuel pump, as they only need 15 psi or so to run. The other thing I like about TBI is that if you are really doing some backcountry stuff you could always carry a spare carb with you. If you use TBI I would consider PROM burning a necessary art. TPIS makes some nice packages if TPI is more your thing. If you are planning on building a motor anyway, and you haven't started yet, I would go for the Ramjet or other complete engine that makes the power you want, or at least a preengineered package that you wont have to mess with. Painless makes some nice stuff, including their new perfect ECM/ Cam packages. The only system I would avoid is the Vortec (96-00 Gen I) as it lacks aftermarket support. EDIT: Another aspect of burning your own chips is that you can eliminate/disable lines of code (EGR, etc.) that you don't want to mess with.