Anyone running a blower and 110* LSA?
Supreme Member
Joined: Sep 1999
Posts: 7,072
Likes: 13
From: Philly, PA
As tight as I've gone was 112* on a mild 216/216 @ .050 Crane cam (non-blower cam). It still pulled like a freight train everywhere compared to the same motor using a N/A dual plane intake. The mild exhaust duration was probably responsible for the fall-off in power as RPMs rose. It bled off a little more boost than I cam with less overlap, I'm sure, but not to the point I had to really spin the pee out of the blower to keep up.
My current cam is 224/230 @ .050 on a 114* LSA and, believe me, it bleeds off a more boost than the smaller cam despite the wider LSA. Whether is consumes it by better breathing or blowing it out the exhaust I don't know for sure but I'd say it's some of each.
General un-educated conclusions- if you're staying with a mild duration cam you can probably go tighter on the LSA without bleeding off too much. On a longer duration cam you better keep the LSA wide or building boost might become a real chore.
My current cam is 224/230 @ .050 on a 114* LSA and, believe me, it bleeds off a more boost than the smaller cam despite the wider LSA. Whether is consumes it by better breathing or blowing it out the exhaust I don't know for sure but I'd say it's some of each.
General un-educated conclusions- if you're staying with a mild duration cam you can probably go tighter on the LSA without bleeding off too much. On a longer duration cam you better keep the LSA wide or building boost might become a real chore.
Thread Starter
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Joined: Mar 2001
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From: Medford, Oregon
Car: 1989 Iroc Z L98
Originally posted by Damon
As tight as I've gone was 112* on a mild 216/216 @ .050 Crane cam (non-blower cam). It still pulled like a freight train everywhere compared to the same motor using a N/A dual plane intake. The mild exhaust duration was probably responsible for the fall-off in power as RPMs rose. It bled off a little more boost than I cam with less overlap, I'm sure, but not to the point I had to really spin the pee out of the blower to keep up.
My current cam is 224/230 @ .050 on a 114* LSA and, believe me, it bleeds off a more boost than the smaller cam despite the wider LSA. Whether is consumes it by better breathing or blowing it out the exhaust I don't know for sure but I'd say it's some of each.
General un-educated conclusions- if you're staying with a mild duration cam you can probably go tighter on the LSA without bleeding off too much. On a longer duration cam you better keep the LSA wide or building boost might become a real chore.
As tight as I've gone was 112* on a mild 216/216 @ .050 Crane cam (non-blower cam). It still pulled like a freight train everywhere compared to the same motor using a N/A dual plane intake. The mild exhaust duration was probably responsible for the fall-off in power as RPMs rose. It bled off a little more boost than I cam with less overlap, I'm sure, but not to the point I had to really spin the pee out of the blower to keep up.
My current cam is 224/230 @ .050 on a 114* LSA and, believe me, it bleeds off a more boost than the smaller cam despite the wider LSA. Whether is consumes it by better breathing or blowing it out the exhaust I don't know for sure but I'd say it's some of each.
General un-educated conclusions- if you're staying with a mild duration cam you can probably go tighter on the LSA without bleeding off too much. On a longer duration cam you better keep the LSA wide or building boost might become a real chore.
Senior Member
Joined: Jan 2001
Posts: 677
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From: Denver, CO
I'm running Crowers "Supercharger 1", 114° LSA, 232° duration at 0.050" and 0.459" lift. I'm also running a Procharger on a 383 that is in a boat.
It idles decent and power is good (at 6 psi). But I need to install a bigger fuel pump and injectors are about maxed out.
When I degreed the cam in, I did have to use a 6° advance offset to get the card's specs and the tail end of the lobes seem to close slowly. The duration measured was a few degrees less then claimed. First blower cam (and blower for that matter), but I would buy from Crower again.
Crower Supercharger 1
It idles decent and power is good (at 6 psi). But I need to install a bigger fuel pump and injectors are about maxed out.
When I degreed the cam in, I did have to use a 6° advance offset to get the card's specs and the tail end of the lobes seem to close slowly. The duration measured was a few degrees less then claimed. First blower cam (and blower for that matter), but I would buy from Crower again.
Crower Supercharger 1
Last edited by a73camaro; May 22, 2003 at 09:49 AM.
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