single plane intake vs. dual plane
11-09-2014, 12:08 PM
#31
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660HP from a mild 540, at 5600RPM, is excellent numbers. The torque curve and peak point, is also excellent. Very nice combo. My guess is it has a very mild camshaft in it
I have to ask though, was this particular pull, where the engine made its best numbers? If the AFR data is correct, my gut tells me you may have been leaving a little power on the table being that lean.
11-09-2014, 12:25 PM
#32
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On big block's and based on some of the input single plane seems to be a obvious choice on small block's id be hard pressed to agree with that. Actually could it be due to lack of proper intake design for high HP big block's? Even on small block's there increasing the plenum size to accomidate higher power aka more mass or air. The vid's a bit corny but it does address the issue.
http://www.youtube.com/watch?v=i2DvnoHWagk&feature=player_detailpage
http://www.youtube.com/watch?v=i2DvnoHWagk&feature=player_detailpage
11-09-2014, 12:48 PM
#33
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No it does I've seen it done on a flow bench. It's been a couple years since I've seen it and honestly at that time I really wasn't interested in it @ .500+ lift the head started gaining with the tunnel ram on it not much but it started gaining. I kinda dismissed what I witnessed on my buddies bench until about a year ago. I started looking into tunnel rams. I called all kinds of cylinder head guys alot of them said yes if done right the will pick up some said no they will not. They are called a tunnel ram for a reason...
I think Mild said it best when he suggested a better set of heads, just the intake is not going to do much!
11-09-2014, 12:50 PM
#34
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I'll tell you my thought about that A/F ratio.
I'll bet a $100 the A/F ratio was derived from the airflow meters #'s vs the Fuel Flow Meter #'s. Not a wideband.
If that was a wideband, why was the engine not tuned while on the dyno ?
It is not a super accurate # and no real info can be attained from it. Not uncommon to be a point higher than what they should be.
In me experience the fuel flow meters are more accurate than the airflow meters. I look at both #'s seperate for other things but never together for a/f ratio.
Last edited by SB; 11-09-2014 at 12:52 PM.
11-09-2014, 12:58 PM
#35
Charter Member#568
Charter Member
Posting it up for you bud.
660HP from a mild 540, at 5600RPM, is excellent numbers. The torque curve and peak point, is also excellent. Very nice combo. My guess is it has a very mild camshaft in it
I have to ask though, was this particular pull, where the engine made its best numbers? If the AFR data is correct, my gut tells me you may have been leaving a little power on the table being that lean.
660HP from a mild 540, at 5600RPM, is excellent numbers. The torque curve and peak point, is also excellent. Very nice combo. My guess is it has a very mild camshaft in it
I have to ask though, was this particular pull, where the engine made its best numbers? If the AFR data is correct, my gut tells me you may have been leaving a little power on the table being that lean.
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Last edited by bck; 11-09-2014 at 01:18 PM. Reason: added info at end
