Cam for procharger
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Joined: Dec 2004
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From: Zanesfield, OH
Cam for procharger I just ordered my cam for my D1SC build. The specs are 226/234 114 .598/.602.
What do you guys think about this cam for my procharger build? Some big lift numbers but I was told I didn't have to worry about fly cutting the pistons.
What do you guys think about this cam for my procharger build? Some big lift numbers but I was told I didn't have to worry about fly cutting the pistons.
Maybe not ideal in my mind but it should work well. Just make sure you run a good spring because aggressive lobes + boost trying to hold your valves open will be stressful on your valvetrain.
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the exhaust duration being 8 degrees greater than the intake duration is good. but the problem is, assuming no advance/retard built into the cam, is that there is an opportunity for boost to be leaked out because of the overlap of the cam. this can be calculated by:
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
Last edited by mattster03; May 2, 2011 at 01:31 PM.
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Verdad Gallardo I would try this in the FI forum though. One of the most popular sponsors that do turbo setups have mentioned at one time or another in a large debate that increasing overlap by increasing duration has always made more power.
Thread Starter
TECH Enthusiast
Joined: Dec 2004
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From: Zanesfield, OH
the exhaust duration being 8 degrees greater than the intake duration is good. but the problem is, assuming no advance/retard built into the cam, is that there is an opportunity for boost to be leaked out because of the overlap of the cam. this can be calculated by:
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
That's a great cam! Keep in mind that centrifigul blowers work well with a wide range of cams, unlike say a turbo application. I've also read that some overlap helps keep the exhaust valves cool.
Staging Lane
Joined: Oct 2010
Posts: 65
Likes: 1
From: Fort Walton Beach, FL
Blowers like split pattern cams with the exhaust duration being 6-10 degress more than intake (rough estimation) and a wide lsa. There is no perfect blower cam, but there are cams that will perform like a$$ under boosted applications. Yours is not one of them so you should have nothing to worry about.
Thread Starter
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Joined: Dec 2004
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From: Zanesfield, OH
My cam has shipped! I want to thank Geoff at EPS for getting this cam out in a hurry as my build time line is a short one...trying to make power tour with the new power. For all the stuff I have read on here about him not shipping when he says that he can or taking to long.....just not the case for me.
I trusted him with is knowledge and cam grinds with my build. I am sure I wont be disappointed.
I trusted him with is knowledge and cam grinds with my build. I am sure I wont be disappointed.
Thread Starter
TECH Enthusiast
Joined: Dec 2004
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From: Zanesfield, OH
Im in the same boat but with a ltwon..try it in the F.I section for a concrete answer and check people sigs to determind what advise is proven and helpfull..I hate it when people with no real F.I exp does a copy and paste move and think there knowledgable.."to smart for there own good"
hahhaaa i know a few of you are itching to respond to me but lets help him along with me find a good blower cam..
hahhaaa i know a few of you are itching to respond to me but lets help him along with me find a good blower cam..
Thread Starter
TECH Enthusiast
Joined: Dec 2004
Posts: 588
Likes: 0
From: Zanesfield, OH
Im in the same boat but with a ltwon..try it in the F.I section for a concrete answer and check people sigs to determind what advise is proven and helpfull..I hate it when people with no real F.I exp does a copy and paste move and think there knowledgable.."to smart for there own good"
hahhaaa i know a few of you are itching to respond to me but lets help him along with me find a good blower cam..
hahhaaa i know a few of you are itching to respond to me but lets help him along with me find a good blower cam..
Teching In
Joined: Oct 2011
Posts: 14
Likes: 0
Anyone have an LSA 117 or 118 with -9 to -11 overlap on a ProCharged car?
Looking for little to NO lope, stick with stock converter and ton of mid range power which my stock cam provides... I just need to get rid of the DOD stuff
Car is a G8, P1SC, 9psi, stock converter, and 560rwhp right now. Only looking for 40hp.
Looking for little to NO lope, stick with stock converter and ton of mid range power which my stock cam provides... I just need to get rid of the DOD stuff
Car is a G8, P1SC, 9psi, stock converter, and 560rwhp right now. Only looking for 40hp.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
the exhaust duration being 8 degrees greater than the intake duration is good. but the problem is, assuming no advance/retard built into the cam, is that there is an opportunity for boost to be leaked out because of the overlap of the cam. this can be calculated by:
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
(int dur + exh dur) / 2 - (LSA*2) or (226+234)/2 - (114*2) = +2
typically for a good procharger cam you would like to see this number at 0 or negative. One of my favorite blower cams is the Futral F7 which has the following specs:
224/230 114lsa which has a overlap of -1
that said. there are cams with good amounts of overlap that make awesome power. for intance, the EPP blower cam is:
232/240 115lsa which has an overlap of +6
So I'm sure the OP will have no issues with the cam, and I think it will make good power. In addition it does appear that it will have adequate PTV clearance for unmilled head and OEM gaskets.
To the OP, PTV clearance has little to do with lift values at .050. Just ask yourself WHEN does max lift occur in the stroke? you'll see what I mean.