Intake length vs torque, Just anthoer carb question No boobs |
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Intake length vs torque, Just anthoer carb question No boobs |
Joe Ricard |
May 18 2005, 02:03 PM
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#1
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
So I have short intakes and 44IDF's with 38mm vents
How long of an intake should I go to with these carbs or should I go to 40 IDF's with 32 vents or 28 vents. I have some longer runner intakes and the other carbs so it's just a matter of experimenting I guess. 2.0L Bus piston Web 86B portmatch intake and exhaust ports. 13lb flywheel Bursch SSI Car weighs 1965 lbs 205/50-15 Kumho V700 R tires. Thought of playing with spacers under the carbs to get more length and maybe spacer under the common length velocity stack. Looking for more torque down lower to pull harder exiting the apex of tight AX turns. Whose got the experience of really been there done that? great gains or don't bother. |
jwalters |
May 18 2005, 05:47 PM
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#2
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Sooo Close....... Group: Members Posts: 1,677 Joined: 14-May 04 From: Huntsville, AL Member No.: 2,068 Region Association: Europe |
Yea, Andy is correct--
A good view of this in work is any 80's-early 90's chevy small block FI---you can see how chev wanted as much TQ as possible by incorporating those really long runners from the plenum--they are about 14 inches long from plenum side to the vavle head--made a real stomper of a motor--but lacked any real serious high end power. 205 HP but over 300 TQ The antethesis of this is look at any modern crotch rocket--absolutley no intake runner length at all from throttle plates to the valve head--this makes unreal screaming power on top, and a real deficit of TQ just about everywhere. 165 HP but only about 70 TQ i.e.--the shorter the length the more top end power ( cammed properly )and less TQ the longer the length the more TQ generally across a stock rev range--but, really hurts breathing abilities up top where most of the HP is made |
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