Stupiderest question ever

[BadBillyB]

Darren, you do realize that these cams are rated at .424" lift and have a very high duration. These are "top end city" cams and require the use of "under the bucket" shims for reliability. For a street motor, the 3S intake grind has too much duration for good driveability, and 400" lift is about the max for stock lifter/shim set-up........I ran 4S intake with a 3S exhaust on my 1175 motor with good results, but I had "under the bucket" shim set-up. What is your engine set-up going to be ????........BadBillyB

[speedy400]

well, the cams seem to have a 2s grind, I'm not sure if its just because they are worn down to that point, but the lift is around .38, according to andrews specs I should be able to use stock springs and such. Basically a street top end performance cam as I understud. Thank you for approching the question though. The engine is basically stock though, 4-2 with cross over pipe, with megaphone style mufflers. UNI filter into jetted carbs and ported/polished ports. Its just ment for street rompin', so performance isnt a Huge deal for me. I was thinking of possibly seeing if I could have a machinist could hard weld some more material on that one lobe and grind it similar(smaller if anything) to the other lobes, like I said I'm not trying to drag it, so perfection isnt needed, just reliability... On that subject, how bad would it be to just throw the cams in and run it like this? basically what'd happen is the #4 exhaust valve just wouldnt open as fully as the rest, this'd be similar to basically having a restricted exhaust for 1 cylinder which I have seen done(sadly). Or is that just one of those things where "Darren... just spend the 400$ and get new cams" let me know, thanks-darren

[BadBillyB]

well, the cams seem to have a 2s grind, I'm not sure if its just because they are worn down to that point, but the lift is around .38,

How did you determine this when the cam says 3s on the end?? It also does not say Andrews on it like mine does. I am not convinced that it is even an Andrews cam at this point. Your exhaust cam is definitely a paper weight. What is the lift on the intake cam???, use a dial indicator to find out.....it's way more accurate with long duration cams........BadBillyB

[speedy400]

Andrews is cast into the cam, and it says 3s(like you said is suppose to have .424) on the ends, the intake cam is .39 . So it isnt possible to fix the exhaust lobe? or use as is?-darren

[BadBillyB]

Andrews is cast into the cam, and it says 3s(like you said is suppose to have .424) on the ends, the intake cam is .39 . So it isnt possible to fix the exhaust lobe? or use as is?-darren

The exhaust cam is toast. You have to use a dial indicator on the lobe to tell what lift it is, on a long duration cam. If it does not come out to .424 than it has been re-ground by someone and is an unknown product (with an Andrew core). A .424" lift cam requires race springs, special lifters, deeper than stock valve pockets and a careful inspection to make sure they will rotate in the head w/o hitting the upper edge of the lifter cavity....I feel your on the path to destruction and would suggest looking for some drop in cams that are more forgiving......BadBillyB

[speedy400]

Well, I called web cam this morning and they said they could referbish them to have a .39 lift and fix the duration if needed. So I guess I alreddy sent the exhaust cam to them today. They said it'll cost about $70. *shrugs* oh well, I'll get em back, do some clearance checks and see how she runs. I'll update when I get it back in "1-2 weeks"thanks VERY much badbillyB, been a huge help, I hope your wrong though and she runs good haha.-darren
PS- Yes I know, I used a dial indicator, thats where I got my measurements.

[BadBillyB]

Well, I called web cam this morning and they said they could referbish them to have a .39 lift and fix the duration if needed. So I guess I alreddy sent the exhaust cam to them today. They said it'll cost about $70. *shrugs* oh well, I'll get em back, do some clearance checks and see how she runs. I'll update when I get it back in "1-2 weeks"thanks VERY much badbillyB, been a huge help, I hope your wrong though and she runs good haha.-darren
PS- Yes I know, I used a dial indicator, thats where I got my measurements.

Well cross your fingers on the lobe repair, typically they will only re-grind cams up to .020" over the stock height. Your cam lobe is worn way beyond that. I hope I'm wrong too and your motor turns out OK. And .390" lift cams are very do-able with good valve springs, stock buckets and stock pistons........Sounds like you got the "mystery" cams for sure......BadBillyB