A bigger cam?

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03-08-2017, 02:09 PM

#71

blsnelling

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Quote:

Originally Posted by 03sierraslt

Don't know the specs of the LT1z cam, and based on your wants I see no need to run a 235 exhaust duration of he PCM of nc cam. That's too late of an exhaust close imo for your setup.

What would you recommend?

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03-10-2017, 08:40 AM

#72

blsnelling

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Quote:

Originally Posted by madmann26

The BT truck cams have some nice lope/chop, especially that stage4 truck cam.

Quote:

Originally Posted by blsnelling

For reference...

Brian Tooley Stage 4 Truck Cam
224/230 .553/.547 111+2 +5° overlap
https://www.briantooleyracing.com/tr...ge-iv-cam.html

On the plus side, this cam wouldn't require new springs.

Quote:

Originally Posted by blsnelling

BTR Stage 4
https://youtu.be/XO_qX5YfXL0

Quote:

Originally Posted by 03sierraslt

The BTR stage 4 would drive very similar to your current cam only with a rougher idle and a little bit more topend. This is assuming your current cam is a 112+2 for valve event purposes.

I am very intrigued by this cam. It would be a quick, drop in replacement, not even requiring new springs. I'm not sure if the base circle is the same, so would have to check pushrod length.

My only concern is lift. This cam has less lift than my current cam. Is this a concern? Should I ask BTR for a custom grind with more lift?

03sierraslt, my cam is ground straight up with no advance built in.

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03-10-2017, 09:10 AM

#73

03sierraslt

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With stock heads that little loss of lift won't hurt anything. For stock heads any lift between .550-.585

Couple less won't hurt anything. Any more is a waste.

Last edited by 03sierraslt; 03-10-2017 at 09:38 AM.