I was just wondering if anybody was using this type of Fuel injection. It is Multi Port injection with a 4bbl Throttle Body on a Single plane manifold.
The Link to the site is http://force-efi.com/

 

Friend of mine is doing a conversion with a Torker intake. Awesome looking at that. It is going on a '68 Camaro ragtop.

RBob.

 

what is tpfi?

 

A tpo? (typo).

RBob

 

yes was a typo i Meant MPFI, anyway Would there be any benifit to running this type of Fuel Injection compared to the Stealth Ram, Or MiniRamII. It still Has IAC,and TPS, Connections and can be used with the GM ECM. Opinions Please. Every time I use the word OPINIONS i know I am in for it.

 

I think that it is a great way to go. After I retro'd EFI onto my hot-rod he wanted to do the same. As his car has a cowl hood I suggested that a TBI w/a '747 would be a good start. It would also mate up to the cowl and look 'period' for his car (which he wanted).

After getting it running as spark only he decided that the ECM & wires in the passenger compartment had to go. So, I said, convert the intake to port and we'll use a '727 under the hood.

(An LT1 intake came and went sometime here too).

Currently all he has left to do is to mount the fuel pump. Then it is time to turn the key.

Here is a pic of the manifold & TB after the conversion. The TB has been completed as the throttle shafts, butterflys, IAC and TPS are not mounted in this pic.

RBob.

 

no plunum

 

Taking a wet manifold and using it dry, makes for slightly oversized runners, since they're not having to carry the fuel volume in them.
Plenum can wind up being on the small side.
You often wind up with two different runner lengths.

Big advantage, is being able to use the 1-4 hole spacers to adjust the plenum volume, air velocity to optimise it.

 

I am in the process of doing the same thing with a Victor Jr intake, I'll let you know how it runs when I'm done.

We've got the injector bungs welded in and cleaned up and the Plenum pieces are all cut and waiting to be welded. I still have to modify the fuel lines to work and then locate the correct size O-rings for the injectors.

My heads are off and stripped, I'm gonna port them tomorrow. So, hopefully it'll be back together either this weekend or the next. My last sticking pionts are gonna be the valve job and getting my dad to find the time to weld the plenum together. Hopefully tomorrow on that one too

I'm going to be running a 500ci plenum, BTW. I've heard mixed reviews on that. Some people say to run a huge one, some say 50% ci of engine displacement, some don't run any.

As far as performance goes, it seems like the huge plenum would be best, as the engine could have a huge supply of air waiting as soon as I crack the throttle. The downside to that is a reported rougher idle. I can always make it smaller if it doesn't work well

 

From what I gather, the only sizable difference is price. I'm in $200 deep, while those other setups range in price from $600-$1200.

There was a guy on here a while ago that was running the Lingenfelter setup, and he converted to a setup like I will be running. IIRC, his 1/4 mile time stayed the same, but his trap speed raised a couple mph.

I'm sure grumpy will remember him He's got a MAF vette, and from reading his past posts they sure did get into it alot. He was banned though, and I never did find out why...

 

That guy never even tried to get the calibration right after swaping intakes

(not why he was banned from what I understand)

 

I'm going to use the new Victor EFI manifold with a huge, custom made plenum on my 383, in conjunction with an f-body LS1 type throttle body. It'll be a while though, patience, patience........