Keihin vs. Edelbrock

[teamexileracing]

K these are the only two aftermarket carbs i can find, well i havent been really looking. But what are the specs on each of them. Hp, throttle response, ajustabilty, price, what not?

Also if you know about any other carbs throw that in their too.

Thanks

 

[teamexileracing]

O and the mikuni too?

 

[jasonp]

How about this.. you do a search on the internet. Round slide vs. flat slide carbs. Then constant volecity. Read all you can on the subject then come back here.
I could write a huge long post about all the different carbs out there and you still wouldn't care.

 

[teamexileracing]

sorry but i did seach last night and i couldnt find anything, it was probly becuase i didnt know what to search for. Thanks. Ill look tonight.

 

[teamexileracing]

K its 1:40 am now and ive been looking for a while. What i found out was that a flat slide is much better then a round slide, no jetting or anything like a round slide. So that altimitly makes the edel a much better carb then the keihin if what i was reading was correct. But i knew that from the beginning.

All i want to know now is how much of an improvement over stock is the keihin 38mm pe carb because i can get one for half the price and new. I cant find the hp gains on it and i just want to know from someone that has one, hows the throttle response?

 

[jasonp]

So that makes your stock carb pretty good?

 

[dswwarrior350]

Well considering that the only major diffrence from stock wouldbe that its 2 mm bigger and has a round slide.... no accelerator pump i cant see you getting a huge gain.

For one your throttle response is going to go down since it has no pump. And just because the carb is bigger doesnt mean its actually much better. Only if the motor requires it.

So id say save you money and get the edelbrock or keep the stock one.

 

[teamexileracing]

Thanks thats all i needed to know. Im going to wait and get and edel now.

 

[jasonp]

you'd see more of a mid and top end gain with the Kehin carb.. The edel would have more throttle responce and be more torquey.

also the edel is smaller then the stock carb.

 

[griff]

Well considering that the only major diffrence from stock... no accelerator pump

Stock is a CV carb, it wouldnt need one. Acc' Pumps are primarily a feature for Flat-slides to compensate for vacuum ramp-up issues (which CV's by design dont suffer from).

 

[jasonp]

or from basically loss of vaccum so air flow is standing still for a quick second and you have no vaccum at the jet blocks when you open the throttle on a flat slide very quickly. Thats what the accel pump is for. I would say the major difference is that it's not a CV carb which IMO is a great carb.

 

[griff]

or from basically loss of vaccum so air flow is standing still for a quick second and you have no vaccum at the jet

Thats what a vacuum ramp-up issue is

 

[jasonp]

[quote:gqj624tu]or from basically loss of vaccum so air flow is standing still for a quick second and you have no vaccum at the jet

Thats what a vacuum ramp-up issue is [/quote:gqj624tu]

I've never heard it put that way before.. ramp up sounds like you creating more vaccum not less.

 

[jasonp]

we should find your post on the carbs griff.. that was a great post.

 

[griff]

[quote:f0998kyx]

Thats what a vacuum ramp-up issue is

I've never heard it put that way before.. ramp up sounds like you creating more vaccum not less.[/quote:f0998kyx]

Hehe... its bascially the inability to generate a sustained (linear) vacuum signal. The vacuum cannot ramp-up because of the "air flow is standing still for a quick second" you mentioned, which happens every time during the non-intake strokes (cuz the slide is held open mechanically by the throttle cable).

Thats the beauty of the CV carbs, the slide drops regardless of the throttle position and maintains some vacuum signal during the non-intake strokes, so the intake tract always has at least a minor vacuum signal present. Even though the vacuum signal is technically dissipating, theres still some there by the next intake stroke.... hence the "Constant Velocity".

 

[griff]

we should find your post on the carbs griff.. that was a great post.

Thanks Jason Its in here somewhere!

 

[jasonp]

see now thats the explaintion I wanted! It makes perfect sense.

That was awesome.

 

[griff]

No problem...

Some Engineers will argue about "the some vacuum signal" remaining before the next intake stroke actually opens the valve, however there was a vacuum condition present when the intake valve closed, but either way it makes no difference.

The vacuum is dissipating quickly in the intake tract, and even if the intake tract is completely full of air (no vacuum left) by the next intake stroke, it still pulled fuel in with it when it passed the slide. So, theres still a fuel/air charge right in front of the valve as it opens again.

 

[97warriorrider]

Jason and griff..you guys really know your ****

 

[madcow]

I don't really understand half the stuff jason and griff said, but for some reason I want to get a CV carb for my Warrior.