tune port injection swap

any one have any info on doing a tuneport injection swap,

 

I photographed a TPI swap for the mag I work for. They used a Street & Performance kit and the damn thing just sort of snapped together. The kit was really comprehensive and worked like a charm. Here's there web site Street & Performance web site

 

Building your own, or aftermarket? A guy I work with put a '86 Camaro TPI on an old 350 he had...worked great. I think he used a Painless wiring harness, and everything else he got at swap meets.

Let me know if you want information on it...especially since I plan on bugging you on strategies for chopping 'vert bows!!!
Steve

 

thanxz, we are using a 1986 camaro, we have the complete car ,just not shure all the parts we need, example smog pump do we need it, also what type of fuel pump we need? its going in a 49 chevy, any info we help thanxz

 

I have heard that Street Performance (or whatever they are called) have really good products. Supposed to be well thought out.

 

OGNC, what mag will it be in?

 

What I know on it: fuel pump's got to be one for TPI, 'cause you need high fuel pressure (50-60 psi, maybe?). The '86, I want to say, has an extra inlet for cold start, that was deleted in later models. If you use updated computers, you don't need the cold start inlet, but if you're using everything from the car, you'll need to keep it.

You'll need new fuel lines, 'cause the high pressure puts a lot more grief than the original 10-12 psi...it's just safer to replace, and you'll need to run a return line, also. There's a book called Chevy Swapper's Guide TPI Fuel Injection by John Baechtel, put out by CarTech that has pretty good info on it. Another reference is Motorbooks Chevrolet Fuel Injection. The dealer manual on the Camaro should be good info, too, if you can find one cheap.

I think the guy at work just needed:
TPI unit (stuff on top...plenum, injectors, fuel rails)
the computer
the fuel lines
the fuel pump
baffled fuel tank (you need to make sure there's always gas to the pump...no baffles: low fuel and sloshing will pull air)
exhaust needs an O-2 (oxygen) sensor

Oh, yeah, I just checked...'86 is MAF (mass air flow), so you need the snorkel looking black plastic thing on front (MAF sensor).

Want me to check with him tomorrow?
Steve

 

hey 38chevy' thanxz 4 the help. so an inline fuel pump will not work, the pump needs to be in the tank?

 

you can use a "surge tank", rather than going to a baffled fuel tank. Injection requires a constant, high-pressure flow of fuel through the rails, and back to the tank...

Any sloshing will fuck it totally.

So, a surge tank is a reservoir just AFTER the exit from the tank, about half a gallon, that fills from the top and pumps from the bottom, so that any sloshing in your main tank is "smoothed" by the little surge tank.

here's a good article with an explanation: SURGE TANKS.

The diagram there is a good example of how to set up the fuel system on a carburetted vehicle that you're switching to EFI.

Hope that helps you out.

 

When I was looking, people wanted 500 smackers for a wiring harness. Being the tight wad that I am, I got a manual from Suncoast conversions that goes into great detail on modifying the factory harness to work in older vehicles. They specialized in Chevy to Jaguar conversions. I've always wired my own cars and paying someone for a harness makes me cringe. I think I paid 15$ for the manual if you are intersted, email me.

 

You can use an inline pump, so long as it is capable of supplying enough constant pressure to operate the EFI set-up. There are aftermarket pumps available for swaps into older vehicles.

You CAN also cobble up a working system by robbing the wiring and electronics off of your donor vehicle, but you will do FAR more work and get worse results than if you just bought a good carb-to-TPI swap harness from Painless, Street Performance, or other aftermarket suppliers. The swap harness kits are generally cleaner looking than a transplanted oem harness, and they've put lots of thought into making the system work without the extra baggage from the late model cars!

You don't need an AIR pump or catalytic converters to run TPI, unless you need them to meet emissions criteria in your application or area. The later model TPI units are more favorable, but if you already have an 86 donor system, then you can get away with it. Be sure to tell the person you buy your harness from what you are installing, and what it was taken from (year, model, engine size, etc).

The GM TPI swaps are pretty easy, with so many aftermarket companies jumping into the fray due to the popularity of this option! Just be sure to shop carefully, go with a well known supplier to avoid headaches later!