It is currently Sat Mar 25, 2017 11:17 pm



Post new topic Reply to topic  [ 16 posts ] 
Author Message
 Post subject: Intake question
PostPosted: Tue Feb 14, 2017 2:21 pm 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
I had some issues with my 32mm slider carb on my HH250SS a while back. I lost a lot of low end torque and top end speed with the carb. Something got me thinking and doing some research. When I installed the 32mm carb, my UNI filter would not fit, so I took the 90 degree elbow off of the UNI and bolted the filter straight to the carb.

Could this be the whole issue of my no torque and loss of high end because there just isn't enough air between the filter and the carb?

Thanks for the help.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 14, 2017 2:27 pm 
Offline
Newbie

Joined: Wed Jan 18, 2017 7:20 am
Posts: 21
I think 32mm carbs are wat to big for a 250 unless it is super modded


Top
 Profile  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 10:09 am 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
It has everything on it that you can put on it other than the BBK. Has the upgraded CDI/Coil, UNI filter, Hammerhead Exhaust, Dr. Pulley clutch and variator with red main spring and 18g sliders.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 11:05 am 
Offline
Buggy Addict
User avatar

Joined: Wed Jul 13, 2005 5:02 am
Posts: 9729
Location: Elburn Il.
dshock20 wrote:
It has everything on it that you can put on it other than the BBK. Has the upgraded CDI/Coil, UNI filter, Hammerhead Exhaust, Dr. Pulley clutch and variator with red main spring and 18g sliders.

Pnp head or cam. These are the things you need .

_________________
-------------------------
Karl



Blade DX 150*
* on the juice for sale
HH 250ss
Quiksilver sr 440(went to a good home)
Joyner 650 SS
Red and black Redline Riots


Top
 Profile  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 11:11 am 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
Nothing has been done to the head or cam. So, having said that...is the 32mm carb just too big for this set-up?

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 1:40 pm 
Offline
Buggy Dealer
User avatar

Joined: Tue Jun 19, 2012 5:30 pm
Posts: 584
Images: 0
Location: San Antonio , TX
I will say from personal exp on my 2007 HH250 GT with the CN250 (Non Dual Range) I ran a 32MM pumper with the HH Exhaust kit and a Uni straight on the carb. Once I got the jetting properly dialed in it made a difference through the entire RPM range but most noticeably was mid range. Not too much longer after this I had the Endrigo rock crawler cam and ported head installed. This combo really made the larger carb shine and I started toasting my clutch on inclines lol. So my engine did benefit from the larger carb but gains were larger with everything that should fall in line with that mod. Hope that helps !

_________________
* 2008 Joyner - On "The Juice"

* 2007 HammHead 250 - Stockish

* 2014 Kandi 110GKG-2 - Uni, OML Coil, Modded exhaust and it SCREAMS


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 2:44 pm 
Offline
Admin
User avatar

Joined: Wed Nov 28, 2007 2:21 am
Posts: 16783
Images: 24
Location: Pacific NW
With too large a carburetor, you may not get sufficient intake velocity to properly atomize the fuel. This makes jetting adjustment harder, but not impossible. Going from the vacuum side to one that is assisted by the pump jet really does help throttle response although it is still not as good as a mechanical slide. I think you will see improvement with the 32mm pumper but will not see its potential until you get a performance cam and properly flowed head.

_________________
09 Joyner SandViper 250
08 Joyner SandViper 250 FOR SALE
57 VW Transport 1200 (Buggified)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 3:51 pm 
Offline
Buggy Addict
User avatar

Joined: Thu Dec 09, 2010 1:32 am
Posts: 2109
Images: 1
Location: Pahrump, NV ~ 55 miles west of Las Vegas, in the Desert....near the Chicken Ranch Brothel
i had an issue on a 150cc cart...when I added an extension to carb THEN a big air filter...
eliminating the extension and getting the filter super close to the carb FIXED the issue......my experience...

_________________
ROKETA 800cc GK-25~Weber DCOF32 Sidedraft custom intake~port&polish~milled head~headers

custom Joyner 250 "Noisy Boy" & Polaris RZR800
Image


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Wed Feb 15, 2017 4:02 pm 
Offline
Admin
User avatar

Joined: Wed Nov 28, 2007 2:21 am
Posts: 16783
Images: 24
Location: Pacific NW
The 250's run better with the air filter hanging right off the carburetor. The 150's do better with a 6-8" intake runner between the filter and carburetor.

_________________
09 Joyner SandViper 250
08 Joyner SandViper 250 FOR SALE
57 VW Transport 1200 (Buggified)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Thu Feb 16, 2017 11:49 am 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
Ok, so it was more of a jetting issue than a filter placement issue. My plan is to upgrade to the BBK, ported and polished head and rock crawler cam. But, that is a ways away.

I have an A/F meter but it isn't currently installed. I might put that on and try the 32mm carb again.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Thu Feb 16, 2017 9:29 pm 
Offline
Buggy Addict
User avatar

Joined: Mon Sep 12, 2005 8:08 pm
Posts: 6123
Location: Quad Cities, IL
dshock20 wrote:
Ok, so it was more of a jetting issue than a filter placement issue. My plan is to upgrade to the BBK, ported and polished head and rock crawler cam. But, that is a ways away.

I have an A/F meter but it isn't currently installed. I might put that on and try the 32mm carb again.


I also had pretty good luck with the 32mm pumper on my prior buggy. What jets do you have in there now? I see you're from Ohio. If you're trying to dial it in with the cold weather, that might be a little tricky.

_________________
Ron

2009 Hammerhead 250SS (it's got a few mods)
Joylaris 400

Gone, but not forgotten: 2005 Carter Talon, 2007 Hammerhead 250SS
Proud member of Team FIB


Top
 Profile  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 21, 2017 9:07 am 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
I has a 42 pilot and a 142 main jets. I am not sure what came in it stock, but the 42/142 set-up didn't seem to change it much.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 21, 2017 9:36 am 
Offline
Buggy Addict
User avatar

Joined: Mon Sep 12, 2005 8:08 pm
Posts: 6123
Location: Quad Cities, IL
That's some fat jetting. I think the stock pilot is a 38 and your main seems big for your upgrades. Back in the day, when I was running a similar setup, I think I had the stock pilot and a 135 main and I believe I still ran a bit on the rich side. What does your plug look like? I'd bet it's black.

_________________
Ron

2009 Hammerhead 250SS (it's got a few mods)
Joylaris 400

Gone, but not forgotten: 2005 Carter Talon, 2007 Hammerhead 250SS
Proud member of Team FIB


Top
 Profile  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 21, 2017 11:34 am 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
I haven't checked the plug. I have an A/F meter but I haven't installed it yet. I went back to the stock 30mm carb with the 35/135 jets. It runs great with that set-up. I want to wait for the weather to get a little bit better before I try to tune the 32mm carb again.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 21, 2017 1:20 pm 
Offline
Buggy Dealer
User avatar

Joined: Tue Jun 19, 2012 5:30 pm
Posts: 584
Images: 0
Location: San Antonio , TX
i want to say I ran mine with 40/135 with head and cam and while stockish it was 38/125.

_________________
* 2008 Joyner - On "The Juice"

* 2007 HammHead 250 - Stockish

* 2014 Kandi 110GKG-2 - Uni, OML Coil, Modded exhaust and it SCREAMS


Top
 Profile Personal album  
 
 Post subject: Re: Intake question
PostPosted: Tue Feb 21, 2017 2:37 pm 
Offline
Initiated

Joined: Fri Dec 28, 2012 3:11 pm
Posts: 68
Images: 0
Location: Cincinnati, OH
I will try that set-up when I put the 32mm carb back on.

_________________
2007 Hammerhead 250ss
UNI filter, HH performance Exhaust, carb re-jetted, Dr. Pulley Clutch and Variator, 18g sliders, Yellow spring (mid)


Top
 Profile Personal album  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ] 


Who is online

Users browsing this forum: No registered users and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

blackLevel designed by GrafsS



phpBB SEO
© Buggynews.com - All Rights Reserved