Quick (hopefully) TBI 350 swap in my "Jeep"

mbryson

.......a few dollars more
Premium Member
#1
So I picked up my replacement TBI 350 yesterday. Guy I bought it from seemed a nice enough rural guy and gave me a sheet with compression test numbers (that I lost). All cylinders between 145-150 psi. Engine is a '93 TBI replacing an '89 TBI. We'll see what differences there are in 4 years (I'm sure there's a few). Hopefully this is a quick swap that works for a while to keep the Jeep operable. If the engine is in great shape, I'll run it for a while. If it's not much better than what I have, I'll run it for a while and do a nice rebuild on my current engine.

Objectives:

1) swap engines

2) fix radiator petcock while I don't have any coolant in the system

3) drive this pig

4) bonus points if I can get the cruise control working
 

Greg

Wanderlusting
Admin
#4
Wohooo! Hope it's a quick and painless swap over!

I know it's more work and money than you want to get into, but I'd seriously consider swapping Vortec heads on while it's easy to get to! Looks like it would cost around $500 IMO the gains would be worth it!

This intake should work- http://www.jegs.com/i/JEGS-Performa...e77ZW9cEJwklPgKrc16Qm7cViLrWeSYUaAlTxEALw_wcB

You'd need an adapter plate for the TBI and a set of rebuilt heads and you're good to go! I've seen rebuilt Vortec heads for around $300/pr.
 

mbryson

.......a few dollars more
Premium Member
#5
Wohooo! Hope it's a quick and painless swap over!

I know it's more work and money than you want to get into, but I'd seriously consider swapping Vortec heads on while it's easy to get to! Looks like it would cost around $500 IMO the gains would be worth it!

This intake should work- http://www.jegs.com/i/JEGS-Performa...e77ZW9cEJwklPgKrc16Qm7cViLrWeSYUaAlTxEALw_wcB

You'd need an adapter plate for the TBI and a set of rebuilt heads and you're good to go! I've seen rebuilt Vortec heads for around $300/pr.



If this one works out for a while, that's exactly what I plan to do. Spend a little and make it "right". There's a set of Summit loaded heads for $999. Just do the short block up nice, add those heads and get the right intake and be done for a LONG time with the motor
 

mbryson

.......a few dollars more
Premium Member
#7
Hope to get the fenders, hood and whatever else pulled off the Jeep tonight (planned on doing that last night but ended up running to Spanish Fark to grab an 8.8 and HP D30 for a TJ for ebryson last night). Looking fwd to getting this project going and buttoned up ASAP.

Get the radiator out and get it down to get evaluated for Wednesday. I thought someone posted up where to get the radiator analyzed/evaluated?

Edit:

It was posted :D

Intermountain Radiator on State and about 1600 S. They have done great work for me many times.
in my other thread https://www.rme4x4.com/showthread.p...p=1088323&highlight=radiator+shop#post1088323

801-485-5561
Called and asked for a repair to a Mepco brass swap radiator. Has a leaking petcock. Was quoted approx $75 for repair and evaluation with a 1 day turn around. Sounds like a winner to me. Thanks USTUCK for the recommendation
 
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Jay5.9L

...I just filled the cup.
Location
Riverton
#8
I've used J-Mac radiator on 35th and state steeet and they were great as well. Think it was $85 to fix the leak, flush, clean, and paint.
 

Bart

Registered User
Location
Arm Utah
#11
Looks like great progress. Good luck with the swap. Greg, it is my understanding that the computer needs to be reprogrammed after the Vortec head swap. Is that correct? Watching this closely as I would like to do this during the winter.
 

mbryson

.......a few dollars more
Premium Member
#13
Need a engine hoist?

Have one. Need to remove the transmission inspection cover, torque converter bolts, bellhousing bolts, starter and motor mount bolts and I think it's ready to be hoisted. I'll swap a few things from the '89 engine to the '93 engine (oil cooler looks like the only difference so far but I haven't looked super close) and throw the '93 engine in there and bolt it up.

A 30 year old wiring harness' clips are pretty fragile. I broke at least two clips pulling things off despite being super careful.
 

Pile of parts

Well-Known Member
Location
South Jordan
#14
Looks like great progress. Good luck with the swap. Greg, it is my understanding that the computer needs to be reprogrammed after the Vortec head swap. Is that correct? Watching this closely as I would like to do this during the winter.
It is my understanding that the TBI computer is not capable of much more than stock. Very mild cam, etc. I run a TBI as well and have read a few threads on building them. Not sure it's worth the effort/cost when you could just pick up a donor vortec ('96-'00) that would bolt in just the same for less than the cost of heads, intake manifold, computer programming. Still not LS style power but same block/etc. as the TBI with significantly more power.
 

Gravy

Edd China of Dirtbikes
Premium Member
#15
If you haven't already, call Jake from Jakes Radiator, he sold his shop to "The Garage" but still works there a few days a week. He's on 200 W. in Bountiful.
He is the best for radiator repair.

Also, I'll echo the other guys. TBI heads flow pretty poorly compared to vortec heads. There are literally piles of chevy's at pick n pull with vortec 350s just waiting for you to bolt them on so that 350 will make more than 200 hp ;)
 
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Greg

Wanderlusting
Admin
#16
... Greg, it is my understanding that the computer needs to be reprogrammed after the Vortec head swap. Is that correct? Watching this closely as I would like to do this during the winter.
I'm not sure, to be honest. I think it the TBI would work with Vortec heads.... the biggest gain with the Vortec heads is the quick burn combustion chambers. I believe the intake runners flow better too, but those things shouldn't effect how much fuel the injectors/computer are running.... IMO. I'm fairly certain that during the crossover years, GM built TBI engines with Vortec heads so it's not like it's that much of a stretch.