Donor cars for 93 LT1 and trans
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Donor cars for 93 LT1 and trans
I am going to pull the race motor and t-400 from the 93 Z28 I just got and return to stock. What are the possible donors for this project? example can I use a 95 Roadmaster?
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I am thinking if I get a good running/shifting LT1 automatic car and pull it everything from it I should be able to just clean it up and install. I am also thinking I want the control unit since the one in the car has been modified for the supercharger. Need to know if there are any little changes to look for.
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The B-Body (SS, Roadmaster, Fleetwood) LT1's have iron heads and a milder cam. The Y-Body (Corvette) and the F-Body LT's have aluminum heads and the same cam (minor year-to-year variations, but not as significant as the change with the iron head engines).
You have to decide if you want to keep your 93 in the original ECM configuration, which is removable chip, batch-fire, speed-density setup, with no tranny controls (as are the 92/93 Corvette LT1 engines). You can swap back to a "stock" ECM tune simply by popping out the chip that's in it now, and plugging in a stock 93 chip.
94 and up PCM is fixed chip/flash programmable, sequential fire, mass air, with electronic tranny controls. You obviously have to match your tranny (4L60 non-electronic or 4L60E electronic) with the ECM or PCM you choose. To further complicate things, there are both switched and pulse-width modulated TC lockup versions of the 4L60E, so that's something else you have to match to the PCM you choose.
There is no physical difference in the dimensions, etc between the long blocks in the various car lines. There is however a different front accessory bracket for each car line. The 93 fuel rails and intake manifold are different than all other years, because of the batch fire configuration.
Not sure it this was the kind of info you are after.
[EDIT] Forgot to mention.... be careful if you opt for a B-Body engine. There is a "baby LT1" that was used in some of them (actually the L99) and it is only 265 cubic inches. A 5.7L/350ci LT1 will have the numbers "327" on the block (last 3 digits of the casting number), and the 4.3L/265ci L99 will have "4.3" on the block. Otherwise, they look identical.
You have to decide if you want to keep your 93 in the original ECM configuration, which is removable chip, batch-fire, speed-density setup, with no tranny controls (as are the 92/93 Corvette LT1 engines). You can swap back to a "stock" ECM tune simply by popping out the chip that's in it now, and plugging in a stock 93 chip.
94 and up PCM is fixed chip/flash programmable, sequential fire, mass air, with electronic tranny controls. You obviously have to match your tranny (4L60 non-electronic or 4L60E electronic) with the ECM or PCM you choose. To further complicate things, there are both switched and pulse-width modulated TC lockup versions of the 4L60E, so that's something else you have to match to the PCM you choose.
There is no physical difference in the dimensions, etc between the long blocks in the various car lines. There is however a different front accessory bracket for each car line. The 93 fuel rails and intake manifold are different than all other years, because of the batch fire configuration.
Not sure it this was the kind of info you are after.
[EDIT] Forgot to mention.... be careful if you opt for a B-Body engine. There is a "baby LT1" that was used in some of them (actually the L99) and it is only 265 cubic inches. A 5.7L/350ci LT1 will have the numbers "327" on the block (last 3 digits of the casting number), and the 4.3L/265ci L99 will have "4.3" on the block. Otherwise, they look identical.
Last edited by Injuneer; Sep 22, 2008 at 07:17 PM.
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Fred,
That helps a lot. I just found out that it is a 94. I do have extra heads and lots of other stuff I have not inventoried yet. I will also have to tear down the motor and see what is in it. There are supposed to be lots of good parts. Motor blew a head gasket and then sat for five years.
The goal is to get the car back to near stock. I plan to sell most of the race parts. Thinking about using the procharger on my 455 Buick. Should make an easy 650 to 700 hp.
That helps a lot. I just found out that it is a 94. I do have extra heads and lots of other stuff I have not inventoried yet. I will also have to tear down the motor and see what is in it. There are supposed to be lots of good parts. Motor blew a head gasket and then sat for five years.
The goal is to get the car back to near stock. I plan to sell most of the race parts. Thinking about using the procharger on my 455 Buick. Should make an easy 650 to 700 hp.
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