LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Look what I got at the junkyard today

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Old 04-11-2015, 09:10 PM
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Default Look what I got at the junkyard today

So after having a few buyers back out on buying my firebird I was at the local pick and pull. Well lets just say it was a good thing I walked back in the GM section. Anyways found this.

A poor old 95 Z28... Wait a Minute

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Wait this is not stock

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Worth the $20

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Granatelli Maf in the back seat on a 1le elbow

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Look a whole BMR package in the back, Plus a BMR Front bar tho it may be bent. Going to compare to mine tomorrow.

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MMM Bilstiens with Ebiach Pro Kit
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Something Shiny in There

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Hrm this is not supposed to be in a pick an pull

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A Couple Extras to help on the cost. Maybe even a new clutch disc. Since my rear main seal took out my 300 mile old spec stage 3.

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So this was at 4:30 Friday. I went to Hunt a Miata engine for a buddy since my Daily is a Miata and I can flip stuff in the pick and pulls. Anyways Came back today and pulled everything. Going to open the pan up since it has a dent in it and swap it to my spare. Fun fact pulling a lt1 out of the top SUCKS even when you cut half of the car off. I always go threw the bottom.

So it looks like I need to look into some stuff. It seems the engine was balanced for a flexplate. Great if I ran an automatic, bad because I run a 6spd. Anyways is there a way to tell it if the engine is internal or external balanced? That being said anybody need a yank converter and a sfi flexplate? Hopefully the rest of the engine is good. The front balancer was trash along with the msd Optispark and coil. However it turns over pretty good. I did raid the ecu so I can use that one minus the fact I need to go from a 3.23 to a 3.42 for the speedo and tell it its an Manual car. Plus this has the Ford Redtop injectors. My brother has tunercats, I just need to get it from him and convert to OBD1. I am happy and that fuzzy felling that was gone for a long time with the Firebird which has been nicknamed the Fireturd as its been off the road since 2-21-2009. Maybe 1000 miles and many part failures later I will have a running Firebird again.

Last edited by 96Formula6spd; 04-11-2015 at 09:18 PM.
Old 04-11-2015, 09:20 PM
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You definitely lucked out. Just the Yank is worth a nice chunk of change.

I spy a Blaster coil, MSD plug wires, reman waterpump, the K&N FIPK looks like it may have survived...not a bad haul.
Old 04-11-2015, 09:26 PM
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Blaster coil got damaged, Some of the MSD wires made it out two are bad that I know of, Good for spares for my MSD set, The Cai did not make it. Unless you like those extra holes for that fresh non filtered air. Yeah paid $658 out the door. Have over $120 in core charges. Will add that it had a small high torque starter that they forgot to charge me for. So that was a bonus. It was a clean car and someone's baby. However I found the License plate was still in the wrapper. I think someone bought it and did not make it home.
Old 04-11-2015, 09:36 PM
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Originally Posted by 96Formula6spd
Fun fact pulling a lt1 out of the top SUCKS
I've done it with the manifolds still bolted to it, lol.

Originally Posted by 96Formula6spd
Anyways is there a way to tell it if the engine is internal or external balanced?
LT1's are neutral on the damper, external on the flexplate. You could just have the flywheel match-balanced to the flexplate.

By the way, good score.

Have you looked into the ports yet, or pulled the timing cover/pan? Those heads look pretty damn clean inside.

Also, what wheels/tires were on the rear?

Last edited by 93Z2871805; 04-11-2015 at 09:43 PM.
Old 04-11-2015, 09:44 PM
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Originally Posted by 93Z2871805
I've done it with the manifolds still bolted to it, lol.



LT1's are neutral on the damper, external on the flexplate. You could just have the flywheel match-balanced to the flexplate.

By the way, good score.

Have you looked into the ports yet, or pulled the timing cover/pan?

The fun is with bent headers in a car that that is also bent. Thanks for the info on the balance. Should be easy to do by a machine shop.

Intake is ported for the Holly twin 58mm throttle bodys. Exhaust ports are not touched at all. Will probably pull the intake manifold and check it over as well. You it to try and get a cam measurement as well. Oil pan will be coming off to check the bottom end as well.
Old 04-11-2015, 09:58 PM
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It would be really cool to pull the pan and see forged rods and pistons...
Old 04-11-2015, 09:59 PM
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No kidding or maybe a 383?
Old 04-11-2015, 11:26 PM
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Wow, wicked nice find...
I hope you open er' up and find a full forged motor I've been meaning to make it the junkyard, this just made me finally decide to go tomorrow!!
Old 04-11-2015, 11:32 PM
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By the way, that radiator looks like a decent find....
Old 04-12-2015, 01:29 AM
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Nice!
Old 04-12-2015, 10:21 AM
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Score!
Old 04-13-2015, 01:03 AM
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Nice score. I saw an LT1 Z28 in my local PnP, but nothing aftermarket on it. I always check just to make sure.
Old 04-13-2015, 11:28 AM
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Was the intake opened up? Could be ported heads there, should look for stampings on either end.
Old 04-13-2015, 12:34 PM
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Sweet find, Lucky Dog.
Old 04-13-2015, 01:21 PM
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if the SFI flexplate does not have a weight welded to it, likely a "neutral" aka zero blance. Machine shop can check quickly and then just match a zero balanced FW if harvesting the motor.

given the impact and assume the car was running at the time...a sudden engine stop at high RPM can mean problems internal to motor so a complete tear down or just harvest what you can that is good
Old 04-13-2015, 01:57 PM
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Originally Posted by 93Z2871805
I've done it with the manifolds still bolted to it, lol.



LT1's are neutral on the damper, external on the flexplate. You could just have the flywheel match-balanced to the flexplate.

By the way, good score.

Have you looked into the ports yet, or pulled the timing cover/pan? Those heads look pretty damn clean inside.

Also, what wheels/tires were on the rear?

That flexplate may not have a weight welded on it.....The flex plate that came on the 383 shortblock I bought from you (Thanks!) a few years back didn't have any weight added to it (zero balanced) therefore I was able to just bolt up a stock LT1 flywheel for my 6spd application.


Originally Posted by ******
if the SFI flexplate does not have a weight welded to it, likely a "neutral" aka zero blance. Machine shop can check quickly and then just match a zero balanced FW if harvesting the motor.

given the impact and assume the car was running at the time...a sudden engine stop at high RPM can mean problems internal to motor so a complete tear down or just harvest what you can that is good
^ What he said!
Old 04-13-2015, 08:02 PM
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Originally Posted by VoyagerCamaro
By the way, that radiator looks like a decent find....
You know I think the new 4 piece design is the way to go these days.

Originally Posted by JC316
Nice score. I saw an LT1 Z28 in my local PnP, but nothing aftermarket on it. I always check just to make sure.
Yeah this is the 10th one or so one I have seen in the junkyards. Mostly stock cars. May see a muffler that is welded on once in a while. Only seen one t-56 car but it was stripped.

Originally Posted by sweetbmxrider
Was the intake opened up? Could be ported heads there, should look for stampings on either end.
It is opened up in the front for the Holly Throttle Body. Going to pull it off and check everything out.

Originally Posted by ******
if the SFI flexplate does not have a weight welded to it, likely a "neutral" aka zero blance. Machine shop can check quickly and then just match a zero balanced FW if harvesting the motor.

given the impact and assume the car was running at the time...a sudden engine stop at high RPM can mean problems internal to motor so a complete tear down or just harvest what you can that is good
Going to do that. The oil pan has a dent on it. Going to rip the intake off and check the pushrods out. If anything looks bent enough then the plan is to tear it down and either harvest it for mine.

Originally Posted by ahritchie
That flexplate may not have a weight welded on it.....The flex plate that came on the 383 shortblock I bought from you (Thanks!) a few years back didn't have any weight added to it (zero balanced) therefore I was able to just bolt up a stock LT1 flywheel for my 6spd application.




^ What he said!
Sounds good I will check my flywheel for a weight. I had my engine balanced years ago but I think I just saw work on the crank and not the flywheel. Worst case I order a new flywheel as this one has been turned about 4 times now.


That being said. I may go pull the intake tonight. The Yank Stall is a SS3600C5. Going to put it up for sale soon. A few other goodies I pulled include a Magnaflow Muffler with a new over axle pipe I can use for my Corsa and A Power Master XS starter. Going to sell the Magnaflow as I was never fond of the sound. They are way to quiet for my taste and what I want from my Firebirds exhaust. Hopefully the starter is a sign of good things to come in the bottom end.
Old 04-13-2015, 08:51 PM
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Dang that is a lucky find. I'm jealous
Old 04-14-2015, 05:06 AM
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Judging by what you have found so far, I think I'd take the gamble and either buy the whole car, or yank the motor and trans. At least look at the trans for a rebuild sticker, and at the heads for any porters sign like AI or LE etc.
Old 04-14-2015, 05:39 AM
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I would be interested in the yank converter....


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