89 Camaro TBI to LS1/4L60E - Third Generation F-Body Message Boards

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89 Camaro TBI to LS1/4L60E

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Old 11-09-2018, 06:33 AM
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89 Camaro TBI to LS1/4L60E

Hi guys,
finally I started my swap last week.
This forum gave me good info and so my swap is staight forward, but at this point I have 2 questions:

When you did your swaps, which trans mounts did you use? The 4 Gen one or the 3. Gen one?
I ask this, because the 4. Gen one is a little bit thicker and the mountig screw to the crossmember is centered,
while the 3. Gen one is thinner and the screw is a little bit offset to the right...

The second question belongs tho the radiator... How did you made them fit? Mine has "nozzle" on the underside (passenger side)
that hits the frame, so it would sit aslant. Did you dril a hole???

I can provide pics later...

Cheers Robert
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Old 11-09-2018, 06:41 AM
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Re: 89 Camaro TBI to LS1/4L60E

I just see a 3rd gen trans mount and a modded 3rd gen trans crossmember. Auto trans.

for radiator I’m using the 3rd gen radioed. If you’re have problems with the drain hitting tyen it sounds like you probably need to drill a hole. I think that’s what you’re talking about anyway. I assume this is a 4th gen radiator and the drain is on the bottom instead of the side? if you drill a hole make sure to protect the bare metal.
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Old 11-09-2018, 06:58 AM
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Re: 89 Camaro TBI to LS1/4L60E

Thanks for your input with the 3.Gen mount.
And yes, I have to fabricate my own crossmember with a "tunnel" for the exhaust pipe from some 5mm steel.
because the swap crossmember from Hawks I ordered was 160 € waste of money, it doesen´t fit in any way.

I would love to keep my 3. Gen radiator, but how did you manage the size difference for the steam line connection?
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Old 11-09-2018, 10:46 AM
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Re: 89 Camaro TBI to LS1/4L60E

Just cut the alignment peg off the bottom of the 4th gen radiator. It isn't needed
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Old 11-09-2018, 07:03 PM
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Re: 89 Camaro TBI to LS1/4L60E

Modified the stock (3rd gen) peice as well.Fits better than the hawks part i tried first....as well.My radiator is aftermarket.

Last edited by 84 1LE; 11-09-2018 at 07:11 PM.
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Old 11-09-2018, 07:22 PM
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Re: 89 Camaro TBI to LS1/4L60E

My steam Vent goes back in at the water pump.

You havent said what engine/trans you’re running. If it’s a truck engine and you’re using truck accessories you’ll need water pump spacers. My spacers were tapped for the fitting.

edit::: never mind I see ls1. Never mind the post
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Old 11-11-2018, 05:00 AM
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Re: 89 Camaro TBI to LS1/4L60E

Originally Posted by scooter View Post
Just cut the alignment peg off the bottom of the 4th gen radiator. It isn't needed
Thanks for the info, i cut it yesterday:





But I´m still pretty unsure which radiator to go with..
The 4. Gen has the good steam vent connection, the 3. Gen fits a little better...

Last edited by Rock-Bert; 11-11-2018 at 05:05 AM.
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Old 11-11-2018, 05:15 AM
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Re: 89 Camaro TBI to LS1/4L60E

Another thing I did yesterday was modifiying the trans crossmember...







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Old 11-11-2018, 05:23 AM
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Re: 89 Camaro TBI to LS1/4L60E

Originally Posted by Billgluckman View Post
You havent said what engine/trans you’re running. If it’s a truck engine and you’re using truck accessories you’ll need water pump spacers. My spacers were tapped for the fitting.

edit::: never mind I see ls1. Never mind the post
Yes, engine and trans are out of a 98 Camaro...







He has relatively high milage (146k mls) but bought it very cheap so with the sale of all good parts, engine / trans and other stuff for the swap was free!

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Old 11-11-2018, 05:40 AM
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Re: 89 Camaro TBI to LS1/4L60E

Here are a few pics of what I have done so far...
Last week I was on vacation, so I had a little time to start my swap.


My good old TBI Nothing wrong with it, ran great but a little less power



Both cars next to each other


For the comfort I wanted to keep A/C (or at least to have the option later) I notched the K-Member:


Cut it...



...made some cardboard pattern...



...fabricated some metal pieces...



...did some spot-welding...




...complete welding...



...cleaning...



...some base coating...



... FINISHED




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Old 11-11-2018, 05:54 AM
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Re: 89 Camaro TBI to LS1/4L60E

As it is a 98 model, it still has a metal tank...
So no benefit for me to keep it, especially due to the different fuel-level-sending-unit.

So I had to change my old TBI pump to the LS1 pump:

98´ fuel tank



left LS1 - right TBI



removed the LS1 pump



replaced the TBI with the LS1 pump



oh yes, they have different connectors, so I had to solder the "new" connector to the "old" wireing and put it back in the tank.
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Old 11-11-2018, 06:00 AM
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Re: 89 Camaro TBI to LS1/4L60E

Then I reworked the fuel delivery.

I went the way with a late model Corvette C5 fuel filter, due to the built in regulator.

This scheme, provided by Pocket helped me a lot to get the right connectors:






And here is the engine side:

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Old 11-11-2018, 12:18 PM
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Re: 89 Camaro TBI to LS1/4L60E

If you had the tank and fuel lines, not sure why you bothered using the 3rd gen stuff
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Old 11-11-2018, 05:14 PM
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Re: 89 Camaro TBI to LS1/4L60E

Nice work either way.

146k isn’t really high. I’ve got no experience with the ls1 but I’ve got a 5.3 with 230k and a 4.8 with 250k. Both run great.

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Old 11-12-2018, 02:11 AM
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Re: 89 Camaro TBI to LS1/4L60E

Originally Posted by scooter View Post
If you had the tank and fuel lines, not sure why you bothered using the 3rd gen stuff
Because the 4.Gen sending unit in the tank works in another Ohm range, I wouldn´t have got the right signal for my fuel level gauge. And this would have been much more work to change than the pump.
Also the hardlines from the 4.Gen doesn´t fit very well without massive bending.
It was no big Deal to modyfy the 3. Gen lines. A little bit cutting here and there... In the engine bay I bent the hardline a little upwards and used the original rubberhose with an AN6 adapter at the end for the LS connection.

@ Billgluckman: THANKS
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Old 11-12-2018, 02:14 AM
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Re: 89 Camaro TBI to LS1/4L60E

Oh, and pls don´t have a deep look on the engine... I´have never seen such a dirty motor!
Don´t know why the previous owner didn´t keep it a little bit cleaner.
As soon as everything is hooked up right and engine runs, I will take it out once again for cleaning.

Last edited by Rock-Bert; 11-13-2018 at 02:15 AM.
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Old 11-12-2018, 11:30 AM
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Re: 89 Camaro TBI to LS1/4L60E

Your swap in the Camaro is coming along nicely. Keep up the good work. You're going to love the way your car feels with the LS1 engine. I know I did when I swapped in an LS1/ 6 Speed into my 1988 GTA.
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