AtlasEngr

I got an '84 Corvette with Crossfire injection from a friend of mine last week. I want to remove this system and add an aluminum intake and either a Holley or Edelbrock carb to it. My question is what has to be changed in order to accomplish this? If anyone knows or has done it - please fill me in. This crossfire injection is a real pig for performance. I just want to be able to run a little harded on this car.

Thanks,

Pablo L.

bogus

do you have emissions testing? if so, you will want to come up with a better plan.

I know for a fact there are a lot of people who have done this.

AtlasEngr

No emissions is not an issue down here. I need to know what to do with the fuel pump deal. Electrical to mechanical.

edsalinas

I believe you can stay with the same fuel pump set up, you'll need to add an inline pressure regulator if I remember correctly. The current pump is to high for a naturally aspirated set up.

Also, keep your hood clearence in mind!!!!

AtlasEngr

What would be the proper pressure? Somethink like 6-8 lbs, right? Anyone have a picture of a carb install or a link to someone that does?

Thanks,

-Pablo.

bogus

I know those who have done it... but with the search feature not working, its gonna be tough to find'm... cause, sadly, I can't remember... :(

FD2BLK

Do a search there is a ton of info on this.
I did this swap when I had the L83 in my 84 and it was fairly stright forward.
Leave the wiring for the sensors, Oil Temp/Presh and Water temp
Put a regulator between the feed line and return line with a T going to the Carb (I had mine set at 6PSI)
If you have an auto install a TC lock up kit (Check post by Slambo you may not have to do this one but I did)
Replace the distributor with a non-ECM controled unit (76 Corvette HEI works well)
Select as low profile intake and air cleaner as posible.
Thats about it remove the X-fire bolt up the new intake and carb and start the motor. All of your gauges will work fine so don't worey about that.

mike 1985

i did this to my 85.
1- for fuel i used a carter elec pump and mounted it in the back. I removed the intank pump and extended it with a piece of 3/8 fuel line hose. I used the origonal fuel pump power wire to power the pump.

2- you need to get the geometry of the 700r-4 cab linkage right , use this link.http://www.transmissioncenter.net/700R4.htm[/url] The part is $33. You can go to 700r-4.com and buy an internal lockup set up for $70

3. Hood clearance is an issue. I used a weiand stealth intake with a drop air cleaner 3" element and had to use a flat lid. If you don't plan to go over 5500 rpm or use nitrous i would use a edelbroc performer intake and then you don't need the flat lid, ( but you still need the drop base) You'll also need holley bracket 20-95 ( i think) it's the 700 r-4 and throttle bracket.

I can recommend a car if you tell me your motor specs.



[Modified by mike 1985, 3:45 PM 3/4/2004]

CFI-EFI

I just hate to see someone take a step back wards. The Crossfire isn't THAT bad. You probably can make it faster with a carb. You'll lose some of the ease of starting, drive ability and fuel mileage. Others before you have done it an loved it. Some didn't. Good luck and...

RACE ON!!!

CAJUN C4

CFI-EFI is correct...You can have your cake and eat it too.Get you an X-Ram Intake system http://www.x-ram.com upgrade your ECM to a 7747 or 8746 and you'll have all the power you need and retain drivability, fuel mileage etc.I have an 84' putting out roughly 375 H.P.(when my Computer tuning is done)

CFI-EFI

CAJUN C4,
You have done some heathy modifications. What kind of 1/4 mile numbers does it produce?

RACE ON!!!

Dominic Sorresso

[QUOTE]I got an '84 Corvette with Crossfire injection from a friend of mine last week. I want to remove this system and add an aluminum intake and either a Holley or Edelbrock carb to it. My question is what has to be changed in order to accomplish this? If anyone knows or has done it - please fill me in. This crossfire injection is a real pig for performance. I just want to be able to run a little harded on this car.

Thanks,

Pablo L

You can do that much easier than going the carb route. What does run a little harder mean to you?

CAJUN C4

I havn't run it at the track yet.Put engine in last July.Getting ready to upgrade the ECM to an 8746 with custom PROM and start tuning.Only action I saw was racing 3 Cobras..Allmost kept up with them.beat me by 1 to 1.5 car lengths to a little over 100 mph.Computer tuning should reverse that along with stickier tires.

CFI-EFI

I wish you good luck with it. Any idea how soon? I love to keep up with what other Crossfire owners are running. We start racing, here, a month from today.

RACE ON!!!

jp2002ls1

I have to vote for carb, my carbed engine runs much better than my TPI ever did, there is a lot involved though if you do everything right. I just like being able to make power at 6500 rpm.

Dominic Sorresso

I would think that your ability to make power at 6500rpm has more to do with the manifold you are using than whether its carb or EFI.

CFI-EFI

You aren't doing THAT with a stock cam. My induction will breathe to 6500 rpms, but the rest of my stock engine can't work up there. Whoever referred to these as basically TRUCK engines, wasn't far off. Early L98's aren't any better.

RACE ON!!!


[Modified by CFI-EFI, 11:12 AM 3/10/2004]