LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Difference in LT1 Engine

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Old 06-26-2018, 02:47 PM
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Re: Difference in LT1 Engine

Originally Posted by slowpoke96z28
A big issue is a lot of "non-GM" people call them all "corvette" engines since that version is like the patriarch of the engine line. They use the term the same way other non-car people may say "this one comes with the 'police engine'. I don't think they say it to be deceptive or anything. I think they just don't know any better. Or, maybe I just have too much faith in people lol...
Wasn't the only difference with the police version a higher output alternator?
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Old 06-26-2018, 03:22 PM
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Re: Difference in LT1 Engine

No... 94-97 Z28 had the 140-amp alternator, same as the B4C Special Service package. B4C was truly just a Z28 disguised as a base model.

The misleading info comes from a website in Canada called camarosource. The say the B4C got a 140-amp alternator, as if it was something different, and that it had “the 4-speed electronically controlled CAGS (“Computer Aided Gear Selection”) automatic transmission.....”.

They have completely mixed up CAGS (Skip-Shift) with the automatic trans, when in fact we all know that was part of the manual 6-speed trans.

http://www.camarosource.ca/rare_specialty/b4c/
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Old 06-26-2018, 11:57 PM
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Re: Difference in LT1 Engine

Drew, u talking B4C or 9C1?

Last edited by slowpoke96z28; 06-27-2018 at 03:30 PM.
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Old 06-27-2018, 10:22 AM
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Re: Difference in LT1 Engine

B4C... the F-Body Special Service option. No idea what they might have done to the Caprice 9C1 Package.
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Old 07-14-2018, 11:32 AM
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Re: Difference in LT1 Engine

Originally Posted by Superbee68104
i have a 1994 Trans Am, Been looking for a LT1 extra Engine to make into a 383 Stroker later on down the road I thought i seen something that a corvette Engine has 4 bolt main? a Guy E-mail me says he has a 1995 Corvette Engine for sale

What the difference between the 1994 Trans Am and the 1995 Corvette Engines? (I do know that the trans am engine should have Aluminum heads it does not)
I have a 95 Corvette block that I got more than 10 years ago.The guy in Texas I bought it from on Ebay forgot tell me that it had been drilled at each cylinder for nitros direct into the cylinder. No eight cylinder has a hole into the water jacket so I never used it. I need to get it out of my garage so you can have it for the shipping cost. The crank, pistons , rods, main caps are still on the engine.


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Old 07-14-2018, 07:11 PM
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Re: Difference in LT1 Engine

..... it had been drilled at each cylinder for nitros (sic) direct into the cylinder....
And exactly how and where on the block did they drill holes for direct injection of nitrous into each cylinder? Makes no sense at all. Maybe the intake manifold......?
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Old 07-14-2018, 07:48 PM
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Re: Difference in LT1 Engine

Originally Posted by Injuneer
And exactly how and where on the block did they drill holes for direct injection of nitrous into each cylinder? Makes no sense at all. Maybe the intake manifold......?
Fred I new you would catch this.When I 1st saw it years ago I thought it was a stupid way to get nitros or any type of gas into a cylinder too

1st they machined the block flat at the cylinders


Then bolted on this little machined block



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Old 07-14-2018, 11:35 PM
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Re: Difference in LT1 Engine

Someone actually told you that was how they sprayed nitrous? With a straight face?

Three holes, penetrating the block at each cylinder, just below the top deck, and just above (if they were lucky) the water jacket, center hole blind and threaded, two outer holes all the way through the cylinder wall, spraying cold nitrous on the top piston ring? Then the piston drops on the intake stroke, nitrous flows in, some of it opposing flow from the intake valve, continues flowing, even when the piston reverses and moves upward on the compression stroke, crown of piston sort of blocks nitrous flow, only a bit of it bypassing the rings into the crankcase, spark ignites, piston drops on the power stroke? Nitrous still flowing... oh, wait, the combustion pressure is greater than the nitrous pressure, and combustion gasses flow out the holes for the nitrous?

Piston bottoms out, reverses to move upward on the exhaust stroke, and nitrous is still flowing into the cylinder and out the exhaust stroke. Oh, wait.... they must have used some fuel injectors that could handle the 1,000 PSI nitrous pressure, to control the nitrous, driven in parallel with the actual fuel injectors?

Craziest thing I've heard in 20 years on this site. Might explain the hole in #8..... and at this point, with all the holes drilled in the block, it's no more than a giant, useless boat anchor.
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