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Topic Review (Newest First)
06-25-2013 08:25 AM
Scandinavian
Quote:
Originally Posted by vinniekq2 View Post
Scandinavian
use a thumper cam idle sound and compare that idle to a new corvette Z-06 idle.
put the stats side by side and explain why the big cam has a smooth idle and the small cam sounds like a race car,,,,
not wanting to get this thread off topic,just stating that specs are more than random numbers and sound does not tell the story.
more over lap Vs less
closing the intake early Vs late
How to make more top end Vs low end
BB requirements Vs sb
handicaps from limited head flow(thumpr cam territory)
etc
are we talking 12deg heads vs 23?
06-24-2013 12:32 PM
vinniekq2 Scandinavian
use a thumper cam idle sound and compare that idle to a new corvette Z-06 idle.
put the stats side by side and explain why the big cam has a smooth idle and the small cam sounds like a race car,,,,
not wanting to get this thread off topic,just stating that specs are more than random numbers and sound does not tell the story.
more over lap Vs less
closing the intake early Vs late
How to make more top end Vs low end
BB requirements Vs sb
handicaps from limited head flow(thumpr cam territory)
etc
06-24-2013 11:59 AM
Scandinavian
Quote:
Originally Posted by vinniekq2 View Post
quite often like I have stated before,I use a tighter LDA and lower ICL on a smaller engine. The BB needs a wider LDA especially when building a 532 or that type of engine.(big bore moderate stroke,high revving).The blower engines are like bigger engines.
Scandi,you didnt mention what happens to the idle quality with a low ICL and narrow LDA


do you mean lika Thumpper cam design?
06-24-2013 02:04 AM
vinniekq2 quite often like I have stated before,I use a tighter LDA and lower ICL on a smaller engine. The BB needs a wider LDA especially when building a 532 or that type of engine.(big bore moderate stroke,high revving).The blower engines are like bigger engines.
Scandi,you didnt mention what happens to the idle quality with a low ICL and narrow LDA
06-23-2013 09:11 PM
Scandinavian
Quote:
Originally Posted by Scandinavian View Post
im not.it is a fact

Technical Specs & Information
06-23-2013 08:56 PM
Scandinavian
Quote:
Originally Posted by techinspector1 View Post
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
06-23-2013 03:59 PM
Blown496 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.
06-23-2013 02:08 PM
techinspector1
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.
06-23-2013 01:43 PM
Blown496 Thanks. I am looking forward to a smooth cruise with this new cam.
06-23-2013 12:29 PM
techinspector1
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.
06-23-2013 09:57 AM
Blown496 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.
06-23-2013 09:50 AM
vinniekq2 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?
06-23-2013 09:37 AM
Blown496 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.
06-23-2013 08:36 AM
vinniekq2 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
06-23-2013 05:05 AM
Blown496 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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