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

DONE with the LT1.

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Old 10-09-2007, 02:48 PM
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did you check stupid stuff like MAF, header gaskets, O2 bundle?

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Old 10-09-2007, 02:53 PM
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I had a miss on my stock engine and couldn't find it like you. Then I bought a new 383 engine after paying $20.000+, now I'm thinking why I didn't buy a LSX engine!
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Old 10-09-2007, 03:03 PM
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lately im not gonna lie, ive been tempted to sell the extra set of LT1 heads i plan on porting and just buy an LS1.

unfortunately, i have too much fun being the underdog to actually do it.
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Old 10-09-2007, 03:27 PM
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Originally Posted by Ok4thGen
Sounds like alot of money to be spent to do the swap, why not just sell your car for a decent price and start over with a LSX based car?
cause my car is only worth 3-4K and i will make way more money parting it out... Plus I learned a long time ago not to make my fun car my daily driver...

MAF is good, no leaks at the header gaskets, and O2's are good.... I swear I have checked everything!!!
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Old 10-09-2007, 03:54 PM
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How about the PCM connectors. I had and issue with a loose/failing connection at one of the sockets in one of my PCM connectors once. It's worth a look, they're pretty easy to take apart and check.
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Old 10-09-2007, 04:17 PM
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what about the ignition control? swaped that with a known good? I would look at the compresion and leakdown numbers first . Maybe a chiped valve . had that happen to me motor ran good cept for in the upper end range .
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Old 10-09-2007, 04:23 PM
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Originally Posted by JustNO
I had a miss on my stock engine and couldn't find it like you. Then I bought a new 383 engine after paying $20.000+, now I'm thinking why I didn't buy a LSX engine!
How the hell did you spend $20k on an hydraulic roller LTx build?
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Old 10-09-2007, 04:27 PM
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Originally Posted by 95z28 -quicksilver
MAF is good.... I swear I have checked everything!!!
Did you try another MAF for S&G?
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Old 10-09-2007, 05:03 PM
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Originally Posted by Javier97Z28
How the hell did you spend $20k on an hydraulic roller LTx build?
I even don't know! Engine built @ Thunderracing and with highest quality parts (AFR, Oliver, Lunati, Diamond ...) but yeah thats the price! The price includes clutch, flywheel, fuel system, Pro5.0 shifter too. After I saw other good places such as Victory Racing and their prices damned!
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Old 10-09-2007, 05:09 PM
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Originally Posted by JustNO
I even don't know! Engine built @ Thunderracing and with highest quality parts (AFR, Oliver, Lunati, Diamond ...) but yeah thats the price! The price includes clutch, flywheel, fuel system, Pro5.0 shifter too. After I saw other good places such as Victory Racing and their prices damned!
That's insane...

I don't even have $10k into my engine build bottom to top, with my transmission, converter, and ford 9" (granted the ford 9" I got for a steal).

Do you have any numbers to show out of all that money yet?
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Old 10-09-2007, 05:18 PM
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Originally Posted by Javier97Z28
Do you have any numbers to show out of all that money yet?
I couldn't understand, I have the invoice, if you mean that. Actually its too much, but when I think there are lots of things that cost a lot. Only Morel lifters are 500$, or ATI Damper 450$, its almost complete engine. Oh and now I'm tired of dealing this +&/^' cam is too big for the street so I'm changing my setup to FI, that means new pistons, new cams, new injectors. But again, I wish I had go with LSX engine !!
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Old 10-09-2007, 05:28 PM
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Originally Posted by chevyinside
what about the ignition control? swaped that with a known good? I would look at the compresion and leakdown numbers first . Maybe a chiped valve . had that happen to me motor ran good cept for in the upper end range .
The owner of the shop said he checked the voltage and readings at the PCM connectors and they were good.

Heads were pulled and looked at, they passed a visual inspection. Ignition control module was replaced... Forgot to write that in the first post too.
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Old 10-09-2007, 08:12 PM
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Hi, I tried to PM but your box is full. Interested in your MSD wires, Opti, and injectors (if your are selling them), please let me know. thanks so much
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Old 10-09-2007, 08:19 PM
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Originally Posted by 95z28 -quicksilver
My LT1 has had a high RPM miss for over 2 years now. After thousands of dollars of diagnosing, 5 shops, countless opti swaps, and all the hours of labor.... I'M DONE.
In any of those shops was the ignition ever put on an oscilloscope?
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Old 10-09-2007, 08:25 PM
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i second putting it on a scope .
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