HarleyTechTalk

Technical Forums => Twin Cam => Topic started by: TheDog on November 15, 2018, 03:55:56 AM

Title: G Extreme
Post by: TheDog on November 15, 2018, 03:55:56 AM
My winter project is G-extreme kit and new exhaust. I have S&S T124 with B2 heads FXDX -01. My question is what kind of fuel valve have you used with G-extreme or fuel pump?
Title: Re: G Extreme
Post by: Mick0311 on November 15, 2018, 05:03:11 AM
Some intersting links come up when you google g extreme.  :embarrassed:
Title: Re: G Extreme
Post by: TheDog on November 17, 2018, 01:02:47 PM
Here is mock up picture for you who dont know what S&S G Extreme is.[attach=0]
Title: Re: G Extreme
Post by: 1FSTRK on November 17, 2018, 02:14:37 PM
A Pingel guzzler dual 5/16" will work but if you are looking for very consistent AFR we found a fuel pump and regulator was best at maintaining fuel levels in the bowl.
Title: Re: G Extreme
Post by: build it on November 17, 2018, 03:43:50 PM
Quote from: 1FSTRK on November 17, 2018, 02:14:37 PM
A Pingel guzzler dual 5/16" will work but if you are looking for very consistent AFR we found a fuel pump and regulator was best at maintaining fuel levels in the bowl.

What pump, regulator, and carbs?
Title: Re: G Extreme
Post by: 1FSTRK on November 17, 2018, 04:05:40 PM
Quote from: build it on November 17, 2018, 03:43:50 PM
Quote from: 1FSTRK on November 17, 2018, 02:14:37 PM
A Pingel guzzler dual 5/16" will work but if you are looking for very consistent AFR we found a fuel pump and regulator was best at maintaining fuel levels in the bowl.

What pump, regulator, and carbs?

Absolutely.

With big power engines you can see the float bowls filling in the AFR graph on long pulls and gravity systems. Even more important when running Carbs with NOS or Alcohol.
Title: Re: G Extreme
Post by: build it on November 17, 2018, 04:19:28 PM
So what combination of said items have you seen work well?

There was a lot of talk about this type of setup by ederdelyi, and at one point, Ron Dicky from Axtell. Great reads of you can find the threads. John Sachs has a lot of experience with the g extreme manifold and both G carbs and CVs IIRC.


Title: Re: G Extreme
Post by: 1FSTRK on November 17, 2018, 04:40:21 PM
Quote from: build it on November 17, 2018, 04:19:28 PM
So what combination of said items have you seen work well?

There was a lot of talk about this type of setup by ederdelyi, and at one point, Ron Dicky from Axtell. Great reads of you can find the threads. John Sachs has a lot of experience with the g extreme manifold and both G carbs and CVs IIRC.

The Holley 12-804 1-4 lb adjustable regulator works well because you can set it to not over power the floats. We used a couple different electric fuel pumps depending on the application.
The mikuni pulse pumps work without a regulator but not as well with dual carbs or high power
Title: Re: G Extreme
Post by: turboprop on November 17, 2018, 05:27:16 PM
Quote from: 1FSTRK on November 17, 2018, 04:40:21 PM
Quote from: build it on November 17, 2018, 04:19:28 PM
So what combination of said items have you seen work well?

There was a lot of talk about this type of setup by ederdelyi, and at one point, Ron Dicky from Axtell. Great reads of you can find the threads. John Sachs has a lot of experience with the g extreme manifold and both G carbs and CVs IIRC.

The Holley 12-804 1-4 lb adjustable regulator works well because you can set it to not over power the floats. We used a couple different electric fuel pumps depending on the application.
The mikuni pulse pumps work without a regulator but not as well with dual carbs or high power

Have you personally done this on a harley platform?
Title: Re: G Extreme
Post by: turboprop on November 17, 2018, 05:30:48 PM
I hope pwmorris chimes in on this as I think he is the only active member here that has run a G Extreme setup on either the street or strip with any real depth of knowledge. 
Title: Re: G Extreme
Post by: 1FSTRK on November 17, 2018, 06:01:50 PM
 :wink:
Title: Re: G Extreme
Post by: turboprop on November 17, 2018, 06:26:06 PM
Quote from: 1FSTRK on November 17, 2018, 06:01:50 PM
:wink:

Darn. I was hoping you had some actual experience with this. Still hoping pwmorris chimes in as he has actually done the things he talks about.
Title: Re: G Extreme
Post by: Hillside Motorcycle on November 19, 2018, 01:24:46 PM
Experience only with our Dual B, and Dual D's.
Gravity feed was fine, but did use an aluminum "funnel" mounted on the lower tree, just to insure, creating additional pressure at speed.
Title: Re: G Extreme
Post by: TheDog on November 20, 2018, 10:04:09 AM
Earlier post was removed due site update.

Here is new picture. The G extreme kit is not complete because S&S dont make it anymore. Intake is from 145. So i had to "narrow"it. I´m going to build exhaust from specs that Burns stainless calculated.
Its a street bike and sometimes maybe on track. I´m from Finland. So sorry about my English.
[attach=0,msg1267445]
Title: Re: G Extreme
Post by: pwmorris on November 20, 2018, 11:40:25 AM
Looks good.
I run a Pingel Dual Guzzler.
http://www.pingelonline.com/prodcat/guzzler-fuel-valves.asp
I wanted max fuel flow to each carb under load, rather than split from a single. I have run fuel pumps for race application but no need for my street bike. Never have a fuel starvation issue.
You might also want to send your carbs to SA Racing and have him give them the full treatment.
BTW, your English is fine-
Title: Re: G Extreme
Post by: Barrett on November 20, 2018, 03:24:38 PM
Quote from: TheDog on November 17, 2018, 01:02:47 PM
Here is mock up picture for you who dont know what S&S G Extreme is.[attach=0]

What size blades are on that? Extreme is a good name for it.  :up:
Title: Re: G Extreme
Post by: TheDog on November 20, 2018, 08:37:48 PM
Quote from: pwmorris on November 20, 2018, 11:40:25 AM
Looks good.
I run a Pingel Dual Guzzler.
http://www.pingelonline.com/prodcat/guzzler-fuel-valves.asp
I wanted max fuel flow to each carb under load, rather than split from a single. I have run fuel pumps for race application but no need for my street bike. Never have a fuel starvation issue.
You might also want to send your carbs to SA Racing and have him give them the full treatment.
BTW, your English is fine-

I had already ordered Dual Guzzler. Just wanted second opinion. Can you tell what Steve does to the carbs compared to Zippers. Because i have one Zippers prepped G3 carb. And i was going to do same treatment for these Carbs.
Title: Re: G Extreme
Post by: Hillside Motorcycle on November 21, 2018, 06:17:34 AM
Tom Quayle, ECRA, and AHDRA Mod Class 114" XL of yesteryear, manufactured different venturi's to test on our dyno at one time.
Very interesting results were witnessed.
With keyboard tuning, that level of innovative craftsmanship has been tossed under the bus.
Title: Re: G Extreme
Post by: jimlibo on November 21, 2018, 11:34:40 AM
Bladerunner on this forum also has some real world experience with the G extreme on a 124 equipped with moderately modified B2 heads.
He maintained pretty much the same torque line as a bored super D   but pulled an add'll 500 rpm out of it with the G extreme. Took some attention to detail to get there.
Title: Re: G Extreme
Post by: pwmorris on November 21, 2018, 05:34:14 PM
Quote from: TheDog on November 20, 2018, 08:37:48 PM
Quote from: pwmorris on November 20, 2018, 11:40:25 AM
Looks good.
I run a Pingel Dual Guzzler.
http://www.pingelonline.com/prodcat/guzzler-fuel-valves.asp
I wanted max fuel flow to each carb under load, rather than split from a single. I have run fuel pumps for race application but no need for my street bike. Never have a fuel starvation issue.
You might also want to send your carbs to SA Racing and have him give them the full treatment.
BTW, your English is fine-

I had already ordered Dual Guzzler. Just wanted second opinion. Can you tell what Steve does to the carbs compared to Zippers. Because i have one Zippers prepped G3 carb. And i was going to do same treatment for these Carbs.
I would just get another G3 from Zippers. Keep the carbs the same for tuning purposes. Totally different price point and internals, as well as externals. Are you running stacks or an air filter? Also, make sure you keep heat from the motor away from the fuel lines (I run a sleeve for them between the motor) to keep that fuel nice and cool on long day rides...(or anytime for that matter).
As far as the dual G's, they are much more civil and easier and to run around town and to dial in for street use than dual D's, (I've run both on the street). Dyno session is really important for set up-fine tuning can be done by yourself over time and I have found I use bigger mains at track vs. street-but for max effort HP and track use-Dual D's rule...

Quote from: jimlibo on November 21, 2018, 11:34:40 AM
Bladerunner on this forum also has some real world experience with the G extreme on a 124 equipped with moderately modified B2 heads.
He maintained pretty much the same torque line as a bored super D   but pulled an add'll 500 rpm out of it with the G extreme. Took some attention to detail to get there.
:up: :up:
Title: Re: G Extreme
Post by: TheDog on November 21, 2018, 08:43:40 PM
Have to use air cleaner here if Finland. Roads are dirty specially on spring and early summer. I not sure what you mean about "Sleeve" between motor for fuel lines.
Title: Re: G Extreme
Post by: pwmorris on November 22, 2018, 07:58:19 AM
Quote from: TheDog on November 21, 2018, 08:43:40 PM
Have to use air cleaner here if Finland. Roads are dirty specially on spring and early summer. I not sure what you mean about "Sleeve" between motor for fuel lines.
https://www.youtube.com/watch?v=I88m09KNPuo
Several companies make it. I also run reflective tape under my tank ( I run an aluminum gas tank).
Also check out the first part of the following video showing heated fuel and resulting vapor lock-
Its a car video and they are pushing fuel pumps as a solution (I've run then for carbs as I mentioned), but the fuel changing due to heat in first couple minutes is interesting.
My point being.....keep it as cool as possible, as our tank and lines are right next to a very hot, high performance motor.

https://www.youtube.com/watch?v=cadNfSNi_Oc
Title: Re: G Extreme
Post by: TheDog on December 06, 2018, 08:21:16 PM
Any tips for aligning throttle axles? Seems to be pain in the a**.
Title: Re: G Extreme
Post by: TheDog on December 30, 2018, 03:18:58 AM
Kit almost done. Throttle shaft line up was tricky. Lightest pull i got by moving cable bridge to rear carb.
Thanks for the tips so far :beer: :beer: :beer:
[attach=0,msg1274185] 
[attach=1,msg1274185]
Title: Re: G Extreme
Post by: Hillside Motorcycle on December 31, 2018, 05:22:05 AM
Greg Dahl recently had an Extreme G set-up for sale.
Twin B's also.
Title: Re: G Extreme
Post by: donk_316 on December 31, 2018, 04:26:55 PM
This looks like a serious case of over carburation! haha!

But that intake manifold?? I want one. Now.
Title: Re: G Extreme
Post by: turboprop on December 31, 2018, 06:26:55 PM
Quote from: donk_316 on December 31, 2018, 04:26:55 PM
This looks like a serious case of over carburation! haha!

But that intake manifold?? I want one. Now.

You have obviously never tried to feed a max effort street 124.
Title: Re: G Extreme
Post by: donk_316 on December 31, 2018, 06:43:04 PM
Quote from: turboprop on December 31, 2018, 06:26:55 PM
Quote from: donk_316 on December 31, 2018, 04:26:55 PM
This looks like a serious case of over carburation! haha!

But that intake manifold?? I want one. Now.

You have obviously never tried to feed a max effort street 124.

100% correct. Hell i havent even touched a carb since my 1942 WLA and 1954 Ural M72