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1995 Roadmaster Sedan
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Hello, i have an stock Lt1 in my chevrolet caprice and i have valve spring z28,roller arms 1.6 and camshaft: https://www.summitracing.com/parts/cca-12-422-8
Tell me how to put it, as I understand it, the pressure plate does not fit from the side front
It says in the notes on the summit listing that’s it’s designed for early non roller camshaft blocks. The Lt1 is a hydraulic roller camshaft engine. I don’t know what “pressure plate” you’re talking about. Have a photo?
 

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Discussion Starter · #3 ·
В примечаниях к листингу саммита сказано, что он предназначен для ранних блоков распределительных валов без роликов. Lt1 представляет собой двигатель с гидравлическим роликовым распределительным валом. Я не знаю, о какой «нажимной пластине» вы говорите. Есть фото?
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It says in the notes on the summit listing that’s it’s designed for early non roller camshaft blocks. The Lt1 is a hydraulic roller camshaft engine. I don’t know what “pressure plate” you’re talking about. Have a photo?
Most likely talking about the thrust plate that holds the camshaft in place.
 

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1995 Roadmaster Sedan
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Is the cam pushed all the way in and engaged with the oil pump drive?
 

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To put a finer point on it , in the Comp Cam family you need a cam with the prefex 07 .

"LT1 and LT4 Engine -uses “07” Prefix
These engines are, as far as the camshaft is concerned, essentially the same as the hydraulic roller engines, with one exception. The distributor is driven from the front of the cam, requiring some changes in the cam core. There is a deeper pilot hole in the front of the cam, as well as a longer dowel pin to locate this drive. These engines require a special timing chain set, "


In a 94-96 B body the cam pin length is critical and you MUST check it on a new cam even if it is supposted to be the correct cam.

Cams for some other applications will work but you better know what you are doing.
Many cams for factory rollers will fit if the cam was made after the mid 90's if you deal with the dowel pin, but some the center hole will not fit the Opti correctly.
 

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Discussion Starter · #8 ·
To put a finer point on it , in the Comp Cam family you need a cam with the prefex 07 .

"LT1 and LT4 Engine -uses “07” Prefix
These engines are, as far as the camshaft is concerned, essentially the same as the hydraulic roller engines, with one exception. The distributor is driven from the front of the cam, requiring some changes in the cam core. There is a deeper pilot hole in the front of the cam, as well as a longer dowel pin to locate this drive. These engines require a special timing chain set, "


In a 94-96 B body the cam pin length is critical and you MUST check it on a new cam even if it is supposted to be the correct cam.

Cams for some other applications will work but you better know what you are doing.
Many cams for factory rollers will fit if the cam was made after the mid 90's if you deal with the dowel pin, but some the center hole will not fit the Opti correctly.
Does that mean this camshaft won't fit?
 

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Pretty much.
It doesnt have the step for the thrust plate.
Wrong 3 bolt pattern for the LT1 specific upper gear. Sure with an electric pump you can run a different gear.
BUT you still need to control forward cam movement but where you would do this in an earlier roller deal , there is the Optispark.
Really a non starter here.
 

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