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Originally Posted by LakeHuronPower
(Post 4826404)
I have the same exhaust but with corsa captains call. I run a 169611 with no reversion issues. Very similar cam with a little less lift and only 1 degree less of overlap than the 731. You shouldn't have any reversion issues in my opinion.
https://cimg6.ibsrv.net/gimg/www.off...b81beecd16.png |
There's a heck of a lot more to go wrong with the flat tappet cams. The cams you're looking at are pretty mild so hydraulic rollers lifters should not have any issues living in the environment. Crane's 169621 would work really well, and is easy on the valvetrain. This is the cam that comes in the 500 EFI. This is a step-nosed cam for use in a GEN VI. Use the GEN VI timing set and it will work great. Comp 929 springs will work and not too expensive. You didn't mention the generation of the block but assuming a Mk-IV or GEN-V so link-bar lifters would be needed.
This is definitely the way. |
Originally Posted by TomZ
(Post 4826414)
There's a heck of a lot more to go wrong with the flat tappet cams. The cams you're looking at are pretty mild so hydraulic rollers lifters should not have any issues living in the environment. Crane's 169621 would work really well, and is easy on the valvetrain. This is the cam that comes in the 500 EFI. This is a step-nosed cam for use in a GEN VI. Use the GEN VI timing set and it will work great. Comp 929 springs will work and not too expensive. You didn't mention the generation of the block but assuming a Mk-IV or GEN-V so link-bar lifters would be needed.
This is definitely the way. |
Originally Posted by 35fountain
(Post 4826408)
Looks like a 110 LSA...I was told not to go any lower than 112 with the exhaust I have for reversion issues
I can’t remember the part number off hand. They sure sound nasty in the 454 but probably a little tamer in a 502/509. |
6 Attachment(s)
Originally Posted by getrdunn
(Post 4826417)
If your adamant about staying flat tappet look into the 502/465hp carbed cam. Close to 236/246-.559/.578 ? Can’t remember if they were 110 or 112. Seems like merc got them from crane on a 112. I ran them in some 454’s with ported dart oval ports and was pushing 500 hp at 5800. Never had reversion issues whatsoever but was on the sticks all the time. 😂. That was with lightening headers.
I can’t remember the part number off hand. They sure sound nasty in the 454 but probably a little tamer in a 502/509. COMP Cams Comp Cams Xtreme Marine Hydraulic Flat Tappet CamshaftsPart Number: 249-K11-240-4Attachment 577312 ★★★★★No rating value for K11-240-4 - Comp Cams 'Xtreme Marine' Hydraulic Flat Tappet Camshafts Write a review. This action will open a modal dialog. Click image to zoom Attachment 577313$563.99 Lowest Price Guarantee Xtreme Marine Hyd. Flat Tappet Cam Complet Kit Chevy Big Block 396-454ci 1965-96 Lift: .564"/.566" Duration: 278°/292° Lobe Separation Angle: 112° RPM Range: 2000-6200 See more product details Free Shipping - Estimated to ship direct from manufacturer on 04/01/22 , pending manufacturer availability. Learn More |
There you go! 234/244 split with your GM heads be good. Never used that cam but would be a good choice IMO.
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Or this: (yes, these where real…lol)
https://cimg8.ibsrv.net/gimg/www.off...59cb16a968.png https://cimg9.ibsrv.net/gimg/www.off...93710212b.jpeg |
So if a schaller 1/4 race cam has double lobes.... how many lobes does their 3/4 race cam have??
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Originally Posted by SB
(Post 4826494)
Or this: (yes, these where real…lol)
https://cimg8.ibsrv.net/gimg/www.off...59cb16a968.png https://cimg9.ibsrv.net/gimg/www.off...93710212b.jpeg Looks like something I’ve dreamt about doing when I can’t get chit out of my head. 😂 |
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