Reverse Split Benefits..
08-14-2007, 12:04 AM
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Reverse Split Benefits.. Could someone please explain to me the benefits of a reverse split cam profile?? In what applications are they optimal?...
08-14-2007, 02:15 AM
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They are good with combos not wanting to spend on 90/90 intakes
The higher duration on intake acts like a crutch on sucking more air in and the Valve Events tend to produce awsome midrange trq.
Good exhaust is a plus.
The higher duration on intake acts like a crutch on sucking more air in and the Valve Events tend to produce awsome midrange trq.
Good exhaust is a plus.
08-14-2007, 08:46 AM
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Originally Posted by PREDATOR-Z
They are good with combos not wanting to spend on 90/90 intakes
The higher duration on intake acts like a crutch on sucking more air in and the Valve Events tend to produce awsome midrange trq.
Good exhaust is a plus.
The higher duration on intake acts like a crutch on sucking more air in and the Valve Events tend to produce awsome midrange trq.
Good exhaust is a plus.
I am pleased with my MTI X1 230/227 .591 .571 112 on stock heads.
08-14-2007, 01:05 PM
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Originally Posted by N4cer
But why not just go bigger on both? Will the increased exhaust duration reduce low and midrange power?
08-14-2007, 04:14 PM
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I would say on a reverse split is more for turbos, and nitrous applications. But like predator said the reverse split have a better mid range.
I would like to think they are not as daily driver friendly as a traditionally split cam.
Ultimately its up to you, and what you want to do with the car. Some people go through several cams untill they come up with a certain grind thats BEST for them.
Im sure Predator, or Patrick G. can find you a cam for your needs.
I would like to think they are not as daily driver friendly as a traditionally split cam.
Ultimately its up to you, and what you want to do with the car. Some people go through several cams untill they come up with a certain grind thats BEST for them.
Im sure Predator, or Patrick G. can find you a cam for your needs.
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08-14-2007, 04:52 PM
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Originally Posted by SHINER
I would say on a reverse split is more for turbos, and nitrous applications.
The basic way to look at it is what needs more of a "crutch"? With a fast 90/90 and a not so great exhaust system, you need a traditional split. Do you have a LS6 intake and a great exhaust system, then maybe a reverse split will fit the bill better. This is just a very basic way to look at it, of course of there is more to it with valve events, etc.
08-14-2007, 04:55 PM
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I think that reverse split is good for cars with stock heads. That would be the reason for more intake duration. If you have excellent flowing heads ie AFR, TFS, ETP, ect then a single split or tradtional split would be better. I would go with a tradtional split for a Nitrous set up because of the extra timing needed so you could get rid of the exhaust and to reduce any pumping lose.
08-14-2007, 05:47 PM
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Many road race engines use reverse splits to get a lot more mid range torque vs high end HP.
Getting up and out of corners UP to speed 3000 to redline happens 6, 10, 15 times every one minute 30 to 2 mins for 20 to 60 mins races.
This is where that mid level tq is needed
Getting up and out of corners UP to speed 3000 to redline happens 6, 10, 15 times every one minute 30 to 2 mins for 20 to 60 mins races.
This is where that mid level tq is needed
08-14-2007, 08:19 PM
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Originally Posted by mudflap1989
Wrong, a Traditional split is desired in either nitrous or turbo applications, you extend the duration on the exhaust lobe to help get rid of the exhaust, the nitrous or turbo is helping to fill the intake side.
The basic way to look at it is what needs more of a "crutch"? With a fast 90/90 and a not so great exhaust system, you need a traditional split. Do you have a LS6 intake and a great exhaust system, then maybe a reverse split will fit the bill better. This is just a very basic way to look at it, of course of there is more to it with valve events, etc.
The basic way to look at it is what needs more of a "crutch"? With a fast 90/90 and a not so great exhaust system, you need a traditional split. Do you have a LS6 intake and a great exhaust system, then maybe a reverse split will fit the bill better. This is just a very basic way to look at it, of course of there is more to it with valve events, etc.
eek!
Lol, my mistake. You WOULD need a higher exhaust duration for a turbo....my mistake.
Thanks for the correction, been offshore for 90 days straight my minds a little ...
Way to be on the ball!
just ordered the mti x1 yesterday
08-14-2007, 10:29 PM
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Originally Posted by LS1RedZ
What kind of times have you ran with your X-1? My best is a 12.1 @ 115 with a 1.8 60'. I dunno if thats good or not..
08-14-2007, 10:32 PM
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all theories , huh ? would a 230 degrees intake duration suck more mixture because it has a 227 degrees exhaust duration ?
i dont think it would "suck" because of this variation . 2 different cycles.
intake valve open ---> mixture in ---> booom! ---> power ---> exhaust valve open .
i dont think it would "suck" because of this variation . 2 different cycles.
intake valve open ---> mixture in ---> booom! ---> power ---> exhaust valve open .
08-15-2007, 02:25 AM
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Originally Posted by Brainful
all theories , huh ? would a 230 degrees intake duration suck more mixture because it has a 227 degrees exhaust duration ?
i dont think it would "suck" because of this variation . 2 different cycles.
intake valve open ---> mixture in ---> booom! ---> power ---> exhaust valve open .
i dont think it would "suck" because of this variation . 2 different cycles.
intake valve open ---> mixture in ---> booom! ---> power ---> exhaust valve open .
There is lift to consider as well.
For exemple a Stealth Cam for my 370 cid with ported 5.3L, 12:1 SCR
224/222 .609/.581 117LSA
That is so much trq I'm gonna think it is a 408
08-15-2007, 04:40 AM
#18
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Originally Posted by orangefun
oh no!! did I buy the wrong cam??234 230 602 598 116
full bolt on 01 a4 3500stall 3.23 with a 200 shot?
(hopeing for great top end)
full bolt on 01 a4 3500stall 3.23 with a 200 shot?
(hopeing for great top end)
08-15-2007, 09:29 AM
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Originally Posted by N4cer
Reverse split hoping for great top end, and nitrous? Hrmm. That should be interesting.
It is not from .050 specs that you tell the hole story of a cam, it depends on which lobe is used, which durations, which LSA and ICL and which lifts.
The small reverse going in my 370 can do just that. Rev till 6800+ and use the events for proper nitrous benefits.