rule change I need a new cam

So the club that I belong to changed their rules again (mostly because my last engine built with advice from you guys cleaned up last season). The new rule in my class states that I must run a factory grind for a cam, but they never stated what year that grind has to be. the way I see it is I can run any cam that the general offered in 454, this should allow some fairly potent offerings. That being said what were some of the best 454 cams offered by the factory. Only thing is it must be flat tappet and must pull 15" of vac. I thought about the ls6 mechanical but I doubt it would have enough vacuum at idle. The ls5 hydraulic seems like it might be a better option, but as I have never used a factory cam I need to draw on some of your experience here. Thanks in advance, Clinto.

ok i do not know what cam you have now ? how much CR you have? many of some of the better older cam grinds are copy of the GM hp cams . how are the hell are they going to know if its a stock GM grind ? with GM numbers????

sorry for the lack of info, 461 with 215 heads on flat tops, 2.19/188 valves with I am guessing about 9.5 to 1 compression, cam is a just an rv cam that makes about 16" of vac currently. they actually have a tear down rule in place in my class, so it may be measured eventually if I keep winning. I asked the same question about how they would know and all I was told is " we will know".

no i do not think they would.. G m marine cam 500/500 222/234 lc 115 close to this cam works good and the l88 grind along with the roller grinds are the only gm cams i used for bbc

Possible to pick a cam with the number on it they like, then send it off to be reground?????

Dave you must be an old time stock car driver hahaha

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Originally Posted by cffisher

Dave you must be an old time stock car driver hahaha

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I never cheated, but I know a lot of guys who did!!!!!:rolleyes:;)

found my cam specs, 214,224 duration@.050, 108 intake lobe center, .503 int/.528 exh, 292/302 duration. this cam makes the 15" of vacuum I need but barely. I know this is not a big cam for a bbc but you can definately hear that it has a cam in it. I guess I need something that sounds a little more stockish, that is why I am leaning towards the ls5.

i will stick with the cam i posted very close to what your lookiing for and has a Gm part number has been used for what your doing

I think I found the pn Pat, is it 10185060, the performance parts catalogue lists it as a 454ho/marine camshaft. if so what do these cams sound like at an idle

not to bad they have to idel good so they can shift at low speed use to buy them cams for 35.00 each hell of a deal

I looked around on the net and they seem to be around 187.00 usd, not to many places carry them. Where can you get a deal on them Pat.

i was getting them as new take out i can not get them any more.from competition products you could call and ask if thet have any hanging round . a company like melling has them and others i can get them threw if they pull you down hand them a mellings book with part number cross over? just get one threw GM parts ? i would look around at marine dealers for one on the shelf or used out of a engine that was hurt long as all lifters stay in the same order it would be a older 454 /330 hp merc cam .i was just thinking i know some one that may have a good used cam /lifters

I found a dealer online who has a new one for 137.00 I think i will buy it and give it a try, thanks for all the info guys.

one more quick question, this cam info states that the cam is advanced 5 degrees, i am assuming this is to provide more torque, would it be advisable to run it retarded a few degrees to get some more rpm.

try it strait up before moving it

Read up on Rhoads flat tappet hydraulic lifters...
Rhoads Lifters

with that marine cam use a set of pro magnum lifters or howards max effort #91112 there is no need to run roads with this cam. but do what you want

I'm sure you're correct Pat, I just wanted him to know that there is another way to get more manifold vacuum.

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Originally Posted by techinspector1

I'm sure you're correct Pat, I just wanted him to know that there is another way to get more manifold vacuum.

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yep i know BUT they want him to run a stock GM cam with Gm part numbers so there a bigger marine cam 440hp cam and use the roads lifters this may work good but ? the smaller cam should be ok i would try both cams . has alot to do with what RPM he going to be at

do you have any more info on this 440hp marine cam, my guess is it would run a little higher rpms?

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Originally Posted by clinto

do you have any more info on this 440hp marine cam, my guess is it would run a little higher rpms?

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well how much RPM do you need were do you need for rpm ?the bigger cam i do not think it will make any vacuum sold lifter is the way i would go and you could play with the lash abit but the l88 cam is abit big with your low cr .the 440hp cam will need roads lifters not shure your going to pass tech with it and your cr is abit low for the cam OEM 41436 Eligin #e1117p 549/558@050..232/239..110 lc this cam i would use if you could get abit more cr would help more like cams i have used i the past