I was thinkin' (not good)about going to MPFI.But I don't want a kit,partly because I'm too cheap :D

So here's my idea:
Can I use a GM computer/harness/sensors/etc from a 90-92 F-body (speed density)TPI car.But I want to use my single-plane intake and have injectors welded in and Fuel-rails made so that I can use a MPFI TB and a stock-type snorkel air cleaner with a old school Ram-Air set-up(tubes run to openings where inner headlights are)like in the back of the magazines.

I know I will need to modify the fuel system and gas tank for a return.

Can I buy a Burner for the Cal-pak chips and be able to set up chips to accomodate a 454BB?Or is it cheaper to Pay someone for chips to do this?

What else am I missing in my plan to get out of shelling out the quid for a complete Kit.

It's not so much the money as it is my desire to something different with parts I scrounged up from here and there....

BTW- I already found my source for a F-body donor car.The guy said $200.00 bucks for everything and he'd let me take it all out of the car.....Good price or not?

Dang Keyboard........wrong button

You may be opening a can of worms here. Yes you can add fuel injection to most any engine. Calibration issues come to mind immediately though. If you take the FI parts off that motor, and IF they fit yours, make sure you use all of them. The TPS sensor is mounted to the throttle body. The block is drilled for a knock sensor, the distributors are usually different, the computer may want a vehicle speed sensor which could mean modifying trans tailshaft.
Its a doable project, but a lot of planning and research will be required.
I think there are even some websites devoted to making FI setups this way.

Sure you can do it. I'd use an aftermarket EFI system (ECU) as they are easier to tune. Look on Ebay for a good deal and it will probably not be much more than a stock ECU and PROM equipment.

I've converted several manifolds over to port EFI that were for carbs.

do a google search on the Mega squirt ecu its cheap and programable and i think you have to put it together so did i mention its cheap. i know some mags tested it and worked very well. it will never run right if you just swap the stuff over. you need to be able to tune it all. ithink you can use a msd distributor and msd box to interface the ecu to control spark. this is a big project you got going and I dont think youlle be happy with it if you just try to cheap every thing together.

Doug F.- In your opinion, should I use the GM computer and burn my own chips (if possible) or should I move toward an aftermarket ECM?

The MPFI bodies have the TPS,IAC's already in them so that isn't a worry.And the MAP sensor can use a bung in the intake as well....But I didn't consider a knock sensor.Will that be a prob??

Already anticipated the distributor situation, but I've already got a GM Hei and MSD6AL box, so at most I need a new Distributor.

My concern is mostly the cost of the intake work and what ECM and type of calibrator to use.

Originally posted by Umass:
do a google search on the Mega squirt ecu its cheap and programable and i think you have to put it together so did i mention its cheap. i know some mags tested it and worked very well. it will never run right if you just swap the stuff over. you need to be able to tune it all. ithink you can use a msd distributor and msd box to interface the ecu to control spark. this is a big project you got going and I dont think youlle be happy with it if you just try to cheap every thing together. I kinda worded that wrong to start out with.Money is an issue of course, but I've been reading some books on FI and I really want to build my own system and learn to tune it as a hands on type of learning experience.If I end up spending the same quid as the kits available costs with equal results, I'd be thrilled just to have made it work with something different.Plus I'll be able to apply some of this knowledge when my Buick Grand National project nears completion....

The Megasquirt looks cool and at $250.00 it is a bargain, but I'm not really into building the ECU itself.

:D :mad: :D :mad:

Doug F: wich aftermarket ECM do you think would Best suit what I'm trying to do?

Before you build your own setup, you should be compitent in custom tuning chips first. The TPI Speed Density setup is a great setup for a small block. To build fuel rails to fit your intake and such is not worth it, also if the car was a 305 the 19lb injectors wont cut it, and if you want power teh 22lb injectors of a 350 wont cut it either. $200 is a good price, if you intend to use everything there, if you just need the harness and such it's not a good price. I kind of think a throttle body on an old air cleaner thing would look pretty ghetto.

SAVE yourself the headache and get something aftermarket for the big block.


BTW you can get a TBI setup to fit the single plane. Holley Projection comes to mind.

Originally posted by Twilightoptics:
Before you build your own setup, you should be compitent in custom tuning chips first. The TPI Speed Density setup is a great setup for a small block. To build fuel rails to fit your intake and such is not worth it, also if the car was a 305 the 19lb injectors wont cut it, and if you want power teh 22lb injectors of a 350 wont cut it either. $200 is a good price, if you intend to use everything there, if you just need the harness and such it's not a good price. I kind of think a throttle body on an old air cleaner thing would look pretty ghetto.

SAVE yourself the headache and get something aftermarket for the big block.


BTW you can get a TBI setup to fit the single plane. Holley Projection comes to mind. The car is a 350cu car.I get the whole sytem/harnesses/sensors/relays, the whole deal for $200.Injectors would be replaced anyway, but I was still thinking about using the harnesses.And I'm thinking a MPFI body on my intake would look like a regular carb with the air cleaner on top of it,ram-air "clothes dryer" type tubes running up to the front on both sides like a classic car looks.And a buddy of mine has an 89 20th Aniv Trans Am that tunes his ride with his laptop that has offered to help some.

If you really want to do it then go for it. It's a fairly advanced project but probably not a lot more involved then building an engine for example. It just uses different skills.

For the fuel you need a sump or a surge tank or else you won't be able to run once you drop much below about 1/2 a tank because it will suck air and stumble.

The computer can be tuned with a programmer and a UV eraser. Look up a Pocket Programmer on the internet for a good cheap programmer. If you do some searching on sites like thirdgen.org or 3rdgen.org you'll find some good tuning info. There is a program called Tunercat (~$100) that allows you to program the thing and a program called WinALDL (free or with donation) that will run on a laptop and monitor the computer to get some feedback. In most cases, I believe it is cheaper to do it yourself.

The knock sensor will thread right into one of the drain holes in the side of the block. I believe you'd want one from a late 80's or early 90's 454SS truck (whatever years they were sold) since, from my understanding, they are somewhat tuned to the engine noise. If not the knock sensor then the knock module.

There's not much else I don't think. If you try to run headers do not put an unheated O2 in the collector, it will not work.

I'm with you, I like to do things on my own. I get to really know the system when I do it myself.

I don't think the price is bad, especially if you are getting the intake manifold (I'd assume you are when you say everything). If the injectors are 22lb or 24lb units then the set with the fuel rails would probably sell for $75+ on E-bay. I think the manifold would maybe pull $150 if it was complete and clean.

You should be able to use the distributor from the car.

Peter

Hey man, i just got done reading your post and i know its probably a little late and i dont want to to turn this in to an advertisement but I am going to start building fuel injection systems for everything from teh small block chevy to big block mopars. They will be able to be customized at the tip of your fingers at any time, and will allow you to run your conventional air cleaner for that nostalgic look. But the great thing is that Im not looking to make mounds of money i just want to help out the guys like me who want fuel injection but can't pay the outrageous prices. graemlins/angry.gif :eek:
I want to offer these complete systems minus the fuel tank mods and pump for under 1,500.
If anyone is interested just reply back on this post or e-mail me at chevelleracer25@hotmail.com.

P.s. And i will build them from teh mild daily driver to a drag car.

http://mrgasket.com/pdf/DFI_cat.pdf Go down to page 9

Originally posted by RB69SS396Conv:
http://mrgasket.com/pdf/DFI_cat.pdf Go down to page 9 Aren't those specific for crate motors??