single carb vs dual

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Re: single carb vs dual

Post  Lem Evans on September 4th 2011, 11:29 am

"how about 2 carbs on alky?"
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Not the way to go based on what I've observed...... 2 carbs on gas or injection on alky.

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Re: single carb vs dual

Post  David Willingham on September 4th 2011, 11:54 am

With Phillip making 1204 with only one carb, I don't know if I would fool with the extra carb, t-ram, linkage, fuel lines, etc.

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Re: single carb vs dual

Post  jesse on September 4th 2011, 1:33 pm

good point

i have been thinkin about tunnel ram with 1 carb?
proubly wont be a big gain eather way iguess

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Re: single carb vs dual

Post  Lem Evans on September 4th 2011, 6:29 pm

David Willingham wrote:With Phillip making 1204 with only one carb, I don't know if I would fool with the extra carb, t-ram, linkage, fuel lines, etc.


Phillip and I were of the opinion that the mud/dirt dragrace may be about how quick the engine gets to 7,500 rpm...125'-200' pit... so that engine was carbed, camed and manifolded to get in a hurry from 5,500- 7,000 rpm. The dyno and on track performance seems to make that theory valid.
In the case of truck pulling it is my opinion that it is more about what happens above 7,000 rpm.

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Re: single carb vs dual

Post  kjett on September 4th 2011, 6:58 pm

Lem, I've been watching and tweaking my combo for that exact theory. The big torque motors can claw their way through the deep mud pits, but the quick revving short stroke motors that have plenty of air and fuel to feed them can get the wheel speed faster to get on top of the mud. I think I proved it this past weekend when my little 466 with Freelander worked d0ve heads and your spec'd cam got me faster times than another ranger similar to mine that was running a 545 d0ve headed motor with much more compression. Very Happy

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Re: single carb vs dual

Post  jesse on September 4th 2011, 7:59 pm

your mostly right lem
but you also gotta have good tourq to get up there
we can take all day long getting the motor up to 4500-5000
befor we start to roll out that is why we like the slipper clutches
but once we at that 5k mark it needs to spin up to that 7500-8000+
in a hurry with alot of weight and force holding us back
it is good to have some lowend but need more higher
i come out around 4500-5500 depending on the track
so anything lower than 4500 dosent matter

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Re: single carb vs dual

Post  Lem Evans on September 4th 2011, 8:19 pm

jesse wrote:your mostly right lem
but you also gotta have good tourq to get up there
we can take all day long getting the motor up to 4500-5000
befor we start to roll out that is why we like the slipper clutches
but once we at that 5k mark it needs to spin up to that 7500-8000+
in a hurry with alot of weight and force holding us back
it is good to have some lowend but need more higher
i come out around 4500-5500 depending on the track
so anything lower than 4500 dosent matter


4,500 does not matter in most any racing engines. My advise is.....do not "take all day long" up to 4,500 rpm.

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