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| DRR Trophy |
How much is to gain from a cam that has a .650 lift to a cam that has a .690 lift? Sbc 434 18 degree heads thanks | ||
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| DRR Pro |
Do you have flow numbers for your heads? 2BKING  1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
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DRR Pro |
This is the most comprehensive data base of cylinder head flow numbers I've found. http://users.erols.com/srweiss/ If there is a significant gain between those lift openings, you may benefit. Lots of other numbers to be considered along with gross lift. Tightening the valve lash or swapping rocker ratio are cheap ways to test the theory. "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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| DRR Trophy |
I don’t have flow numbers, thanks for info though I wasn’t sure if 40 thou is significant, but was thinking its gotta help, thanks guys | |||
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DRR Pro |
Unless you have really bad valve shrouding, I think you'll make more gains from change in lobe duration, intensity, separation, and centerlines than in just lift.... When people change rocker ratios, they forget that it also changes duration slightly...So any gains are likely from a combo of both rather than just one factor... Mark Goulette Owner/Driver of the Livin' The Dream Racing dragster www.livinthedreamracing.com "Speed kills but it's better than going slow!" Authorized Amsoil Retailer | |||
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DRR Top Comp |
Agree correct duartion and valve open and closing points more important than total lift. IMO excessive lift is just good for killing springs quicker. Like compression there is a point of little to no gain. Best thing about a roller setup. You can changes cams all day and only need to buy cams. America home of free. Brought to you by 2nd amendment. | |||
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DRR Pro |
although i cant say how much .with though heads i think you will see a decent improvement honesty is the best policy,insanity is a better deffense 1.036, 6.16@ 224 | |||
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DRR Top Comp |
Depends on a lot of things. If you have the Brodix 18 X heads they do not flow as much as some of better 23* heads. The Brodix 18*C heads are much better. In any case .650 lift is not much to feed 434 Cubic inches so increased lift (and duration) should help it. The better the heads flow the bigger that difference should be. https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge. Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue. 4X NE2 CHAMPION. 2020 TDRA NE2 Champion | |||
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| DRR Pro |
Did you miss this? "Despite the high cost of living, it remains popular." Dave Cook N375 | |||
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