I just bought an 89 GTUs that needs a rebuild. My plans are to pull the 13B and put it in my FB, and throw an LS1/T56 in the GTUs.

So now I have the following choice. Do I:

A) Rebuild the 13B, streetport it, and install the whole thing, ECU, fuel injection, etc, into the FB, or

B) Rebuild the 13B, streetport it, hunt down a dellorto or other high performance carb, and put it in the FB?

Sure, it's already got the EFI and all that, so it's not like I would really have to do much other than set up fuel lines and a pump, but is it really worth all the hassle of moving the wiring harness, doing the fuel lines, installing the ECU, etc? Or, am I better off just using the motor and carbing it?

Discuss.

Oh yeah, and I don't want to hear any bashing of me putting the LS1 into the GTUs... That was an easy decision.

 

It's really not all that hard to change over the harness and whatnot. You will swear a little bit, but overall it's worth it.

I vote keep the FI.

 

I would say keep the FI. It would make it easy to turbo if you ever choose to do that. Plus you would save money because instead of buying the the carb you could use that money for other things.

I second that vote to keep FI

 

it will not make it easier to turbo... actually it will make it harder and more expensive. if it was a TII motor then we'd have another situation. you will honestly get more power off the bat and be up and running quicker and easier if you use a carb.

the stock wiring harness in the gtus is gonna have problems most likely and alot of clips and connectors are gonna break. and to be on the safe side you would really need to send out the injectors and get them cleaned, tested, new caps, etc...

the ultimate way to do it would be to get a stand alone and do it all right off the bat.

but i still vote carb that bitch WOOOOT!

 

poor gtus

 

Yeah, you're right... Poor GTUs... Let's see... I bought it with a blown motor, quarter panel damage, a rusted out front fender that needs to be replaced, bad paint, broken hood latch, and some ******* stole the wheels about three weeks before I bought it. It was on blocks when I looked at it and purchased it.

So, I'm going to totally fix it, put in a powerful engine, a 6 speed, and save it from the junk yard.

Poor GTUs indeed.

 

That's what I'm thinking. It just seems like it would be so much easier to go bare bones with the motor and it would be up and running in no time.

 

Guess I was wrong. If FBII says so, I know so! I will shut my mouth from now on.
*crys a lil, hates to be wrong*

 

Carb it! And, if you MUST go LS1, CARB IT! I've always wanted to see an LS1 with like three four barrels feeding it. That would be ******* tight.

 

Carb the FB, and do whatever with the FC (they look like pregnant whales anyways) so who really cares? There only purpose in life is to donate engines, trans, and front crossmembers for FB's

kenn

 

you weren't really "wrong" it's just alot of people dont understand what it takes to make the n/a ecu understand boost. which is an insane amoutn of work and stress.

but yes, go carb

 

i had a bitch of a time trying to get my EFI working on the 13b swap. after endless hours of screwing around i just gave up and went with a holley. so far im liking it and the simplicity is definetaly a bonus factor.

fuel injection sure does have its bonuses when it comes to gas mileage tho

 

id say keep the fuel injection and plan on a stand alone ECU like a megasquirt.
a properly designed FI system will not inject fuel until the engine is out of the overlap period, meaning no gas goes out the tailpipe befoe its gona through the engine first. im fairly sure the genII's had this feature, but if not the standalones surely must.

injection also keeps the mixture true, and might even idle without making you bald.

 

**** carburetors. EFI all the way... I understand that ****. Hook up a laptop and tune away.

I don't know jets from venturis... I don't know how to change the jets or where to get them, etc etc etc...

 

Took the words out of my mouth...

 

a weber carb just sounds WICKED... you'll be totally happy with that.

I had a second gen motor in my last GSL-SE with a weber conversion on it and was very happy. The carburator will make more power than the STOCK fuel injection anyway.

The install for the carb, is also about 10,000 times easier than converting over the FI. (not that the FI is hard... its just very time consuming strippingdown that dash harness)

I know, IVE DONE BOTH.

 

The LS1 will have the fuel injection, sorry.

And if I do go the carb route on the 13B, I want a sidedraft dellorto.

 

Yeah, I'm sure that no one even MAKES a carb setup for the LS. . . it was just a thought that sounds cool as hell

 

What's the price difference of a carb'd 13b and one with a megasquirt system