my buddy has a 84 rex. he got a 4 port motor put in it with carb. set up. now he's thinking of getting a fuel injection set up.

whats the easiest way to approach this and how.

any help or direction would be greatly appreciated?????

 

Well, what type of carbs does he have? if the carb is a Webber he can just buy a TD that will sit ontop the intake manifold.. then buy injectors and a fuel computer....


http://www.twminduction.com/

These guys sell Webber style TBs that you can use..
For the computer you could do something like a Haltech F9.. And for injectors pick up some injectors off http://www.thepartstrader.com they should work...


I would probably do 2 550cc injectors.. Maybe 4.. anyone got a fuel calc?


-Zach

 

He will also need a fuel pump & regulator..

-Zach

 

but he has a 650 cfm holley. any other ways of doing efi????

 

You can buy a square flange TB just the same.. do a search on google for one.. BTW you should be looking for a 500-600CFM...


-Zach

 

yeah i know i told him 450cfm actually but he has a street port so racing beat says he should get a 550cfm.

so a throttle body and fuel computer.

so it would go somewhat like this:

throttle body replacing carb. then put 4 injectors (TII 550's) plummed into tb. am i right on this so far because i dont have a clue really. and a f9 haltech replacing his stock ecu.

how much you think this will run?

thanks again....

 

Well, the f9 is about $1K so it is pretty expensive...
But you can watch the partstrader for used ones..


Also there is a company called SDS that might have something you could use.. Or there is the wolf 2d....

Everything you had there looked good..

A TB usually will cost you ~$300-400

BTW is his motor a 12a????

-Zach

 

its a 13b 4 port rebuild with a street port.

 

In that case if you are low on money pick up a 13B manifold & TB.. Then pull off all of the crap & put some block off plates on it.. port it as you like & run that... then all you would need is the computer...


You can use the manifold from a TII, that would be the cheapest.. I know someone who has the TB & upper manifold off of a 90TII that he'd probably sell you..
his email is kurgan@darkcloud.org tell him i sent you..


-Zach