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Old 06-21-2013, 07:49 PM
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how well with this cam work on blown 496

Blower guys. How does this look for a street only 871 blown 8.25 comp. 496 stick shift Chevelle?
@ .050
Duration IN.227
Duration EX.239
Lobe Sep.114
Adv 4 degrees

IO 3.5
IC 43.5
ICL114
ECL118
Overlap 5

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Old 06-22-2013, 09:05 PM
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Quote:
Originally Posted by Blown496 View Post
Blower guys. How does this look for a street only 871 blown 8.25 comp. 496 stick shift Chevelle?
@ .050
Duration IN.227
Duration EX.239
Lobe Sep.114
Adv 4 degrees

IO 3.5
IC 43.5
ICL114
ECL118
Overlap 5
Call Blower Drive Service for a recommendation.....
http://www.blowerdriveservice.com/contact-us.html
As an aside, they recommend 110 LSA on gasoline, 114 on alcohol.

Last edited by techinspector1; 06-22-2013 at 09:15 PM.
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Old 06-23-2013, 12:30 AM
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might want to list the rest of the parts list in the engine.
like lift? solid roller?heads? exhaust?
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Old 06-23-2013, 03:33 AM
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Quote:
Originally Posted by techinspector1 View Post
Call Blower Drive Service for a recommendation.....
Contact Us
As an aside, they recommend 110 LSA on gasoline, 114 on alcohol.
Best Lsa depends on Valve size cylinder volume to fill and lift and lobe acceleration and CR or Boost And FLow in and out.
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Old 06-23-2013, 06:05 AM
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Hyd. roller .600 lift, Edelbrock Perf RPM rect. port heads, Hedman 1 3/4 headers, dual Holley 4777 blower carbs. I know it is small by most standards but am more interested in street manners, power brakes and low rpm cruising. And why is it that BDS is the only one that uses 110lca while the rest of the world is 114?
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Old 06-23-2013, 09:36 AM
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sounds like a very big engine to make not very much power?The cam is plenty mild.The carbs are very small even for a 350.I would double check the primary tube size? 1 3/4 sounds very small also.

I believe Tech is talking about the LDA and you are talking about ICL
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Old 06-23-2013, 10:37 AM
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I have had some recommendations for even smaller cams to get my cruise range in the 2000-2500. The 240/245 cam does not like that low rpm. Especially when I am in 5th under 2000rpm. My goal is to have a crisp responsive tire burner on cruise night and not have to deal with low speed cam surge and low vacuum. I would guess that the carbs would be fine unless I buzz it hard but I never go more that 5500rpm in short bursts.
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Old 06-23-2013, 10:50 AM
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the power would likely drop after 5,000 rpm.


My cam is 256/264,small block,N.A. @ 60 mph Im just over 2,000 rpm

what are you worrying about?
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Old 06-23-2013, 10:57 AM
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I avm hoping the wide spread in duration will not be a problem. With 56 degrees overlap at advertized duration it should be really mild and strong down low. Just want to feel good about it before I change it.
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Old 06-23-2013, 01:29 PM
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Quote:
Originally Posted by Blown496 View Post
The 240/245 cam does not like that low rpm.
It might not like it naturally-aspirated, but forced induction is a whole other ballgame. The cam will be forced to like it.
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Old 06-23-2013, 02:43 PM
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Thanks. I am looking forward to a smooth cruise with this new cam.
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Old 06-23-2013, 03:08 PM
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Quote:
Originally Posted by Scandinavian View Post
Best Lsa depends on Valve size cylinder volume to fill and lift and lobe acceleration and CR or Boost And FLow in and out.
So, argue with Blower Drive Service. They state that a 110 LSA works best on gasoline and a 114 LSA works best on alcohol.
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Old 06-23-2013, 04:59 PM
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Wasn't looking for an argument...just curious. I actually thought about going tighter on lca, up the compression and under drive the blower but like power brakes and idle quality too much. Getting old I suppose makes me less tolerable of herky jerky stuff. I never wanted to make a pass or get on a dyno to see how much power it has. I just want a tire boiling monster on the street that is all fun and no fuss.
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Old 06-23-2013, 09:56 PM
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So, argue with Blower Drive Service. They state that a 110 LSA works best on gasoline and a 114 LSA works best on alcohol.
im not.it is a fact
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Old 06-23-2013, 10:11 PM
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im not.it is a fact

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