Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

4 Pages V < 1 2 3 4 >  
 Reply to this topicStart new topic
> My turn at motorcycle Throttle bodies, making progress
Phoenix-MN
post May 10 2013, 08:14 PM
Post #21


Senior Member
***

Group: Members
Posts: 927
Joined: 23-January 04
From: ST. Bonifacius,MN
Member No.: 1,590
QUOTE(kevin311 @ May 10 2013, 05:07 PM) *

What size engine are these going on? What are the throat sizes on them? What are you using to control them?
I'm doing something similar with VFR800 ITBs.
I really like how those come apart. The VFRs are 2 two-barrel castings.
I'll be following this one. (IMG:style_emoticons/default/aktion035.gif)



1.7 with VFR800 tbs (work in progress)
http://www.914world.com/bbs2/index.php?showtopic=192548



Mine are going on a 2.5L six and I'm using a Holley HP EFI ecu with crank fired ignition. The throat size on the GSX R600's is 38mm. My carbs are currently using 32mm venturies so 38's should be in the ball park.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post May 10 2013, 08:18 PM
Post #22


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
QUOTE(Elliot Cannon @ May 10 2013, 09:09 PM) *

What will be used to trigger the injectors?


I already have the SDS-4F system, I ran it single TB modified D-jet plenum for several years in my 914. this time it's a much bigger engine and the upright conversion for the bug.

I'm leaning towards milling it in and match porting as much as possible, I don't care for the adaptors much.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rick 918-S
post May 10 2013, 08:37 PM
Post #23


Hey nice rack! -Celette
***************

Group: Members
Posts: 20,785
Joined: 30-December 02
From: Now in Superior WI
Member No.: 43
Region Association: Northstar Region
QUOTE(Mark Henry @ May 10 2013, 09:18 PM) *

QUOTE(Elliot Cannon @ May 10 2013, 09:09 PM) *

What will be used to trigger the injectors?


I already have the SDS-4F system, I ran it single TB modified D-jet plenum for several years in my 914. this time it's a much bigger engine and the upright conversion for the bug.

I'm leaning towards milling it in and match porting as much as possible, I don't care for the adaptors much.


The rubber connector on my set have the depression to match the TB. Also the exiting side to the engine is a slight oval likely designed to help with reversion at the head.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post May 10 2013, 09:29 PM
Post #24


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Just got a sextet of ITBs for my new 2.4 engine. I'm thinking about welding adapters so they bolt directly onto the heads.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post May 11 2013, 06:04 AM
Post #25


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
QUOTE(McMark @ May 10 2013, 11:29 PM) *

Just got a sextet of ITBs for my new 2.4 engine. I'm thinking about welding adapters so they bolt directly onto the heads.


Wouldn't the TB's warp? and would you real need to do this?

One thing I notice is although there's meat at the flange the TB castings are very thin.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
crash914
post May 11 2013, 08:00 AM
Post #26


its a mystery to me
***

Group: Members
Posts: 1,827
Joined: 17-March 03
From: Marriottsville, MD
Member No.: 434
Region Association: MidAtlantic Region
Just get Evil to weld you up some manifolds like he did for his bus....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rick 918-S
post May 11 2013, 08:04 AM
Post #27


Hey nice rack! -Celette
***************

Group: Members
Posts: 20,785
Joined: 30-December 02
From: Now in Superior WI
Member No.: 43
Region Association: Northstar Region
Cast aluminum sometimes is tricky to weld. I've had issues with it kind of bleeding contamination. I've had to stop and clean the parts as I go. Otherwise I think if the flange isn't too thick Mark could weld the TB's to a flange or shortened intake. I would try to make the welds tiny. If you were in doubt You could always weld the inside seam also.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post May 11 2013, 10:24 AM
Post #28


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Came to my senses a little bit. Ordered one of the stock plastic/rubber boots to try. If these work, I'll just use them instead. Welded on flanges would be cool, but the cost to produce the pieces I need (custom) and then the effort to weld them on is more than is really worth it unless I have no other option.

Warping may be an issue, but for $25 for three throttle bodies, I'd be willing to try it. (IMG:style_emoticons/default/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post May 11 2013, 07:28 PM
Post #29


Custom Member
***************

Group: Members
Posts: 24,645
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
I love the title of the thread.....just cause its so true.

I would love to see one of these project done to completion.

Rich
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JamesM
post May 12 2013, 09:01 AM
Post #30


Senior Member
***

Group: Members
Posts: 1,991
Joined: 6-April 06
From: Kearns, UT
Member No.: 5,834
Region Association: Intermountain Region
QUOTE(Mark Henry @ May 10 2013, 08:57 AM) *

Like I need another project... Beginning to be as bad as Dr Evil (IMG:style_emoticons/default/laugh.gif) ... (IMG:style_emoticons/default/huh.gif) ... (IMG:style_emoticons/default/unsure.gif)

I need some TB's for my 914/4 type 4 into bug project engine.
Jenvey, Extrudabody and TWM TB's are crazy frickin' expensive for what they are, so I'm going the Motorcycle TB route.

This is what came in the mail today, stuff looks real good (IMG:style_emoticons/default/piratenanner.gif)



How come no one ever brings up the CB Performance TBs, looks like they are making the 40s again.

http://www.cbperformance.com/ProductDetail...roductCode=7097

Sure used bike TBs are still cheaper but the CB setup is still pretty cheap, and when you consder the time it takes to hack together the bike TBs just to wind up with what is still a hacked together solution it does not add up. For $500 bucks the CB parts bolt on, my time is worth more then that.

Of course if you are doing it for the fun of the build, then it is a different story.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post May 12 2013, 10:02 AM
Post #31


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Sorry if we've totally (IMG:style_emoticons/default/hijacked.gif) you Mark.

Pic of my TBs.


Attached image(s)
Attached Image Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post May 12 2013, 12:00 PM
Post #32


Advanced Member
****

Group: Members
Posts: 3,825
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None
QUOTE
What did the TBs come off of? I have pondered this for my TR6.


98, 99 Suzuki GSXR 750.

http://www.ebay.com/itm/98-99-suzuki-gsxr7...y-/110850134032
~$180 Google IS your friend.

And it looks like only one of the four has the TPS.
Will you put one of the TPS on each side, or depend on the linkage to keep them synched?

Stu
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post May 12 2013, 12:50 PM
Post #33


914 Wizard
**********

Group: Members
Posts: 10,638
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
QUOTE(McMark @ May 12 2013, 09:02 AM) *

Sorry if we've totally (IMG:style_emoticons/default/hijacked.gif) you Mark.

Pic of my TBs.


Mcmark, I have the same ones, get to it x2=$$
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post May 12 2013, 04:12 PM
Post #34


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
QUOTE(McMark @ May 12 2013, 12:02 PM) *

Sorry if we've totally (IMG:style_emoticons/default/hijacked.gif) you Mark.

Pic of my TBs.


It's OK (IMG:style_emoticons/default/smile.gif)

I thought about do this on my 914/6 conversion as well, But I already have the Webers
I would have used Triumph TB's , what ones are those?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post May 12 2013, 08:50 PM
Post #35


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
Polaris 650 TBs. I'm reconsidering since they're 46mm, which is huge for a 2.4. But I might just strive ahead and if they're too big just sell the setup to a 3.2 owner.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post May 15 2013, 02:31 PM
Post #36


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
I didn't like the funky shape on the bottom of the TB so I did some profiling today. (IMG:style_emoticons/default/smile.gif)

Original shape is top right TB.


Attached image(s)
Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post May 15 2013, 02:34 PM
Post #37


PMB Performance
***************

Group: Admin
Posts: 19,289
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
QUOTE
Beginning to be as bad as Dr Evil


Send those to Evil... he can weld them up for ya! (IMG:style_emoticons/default/w00t.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dr Evil
post May 15 2013, 07:48 PM
Post #38


Send me your transmission!
***************

Group: Members
Posts: 23,032
Joined: 21-November 03
From: Loveland, OH 45140
Member No.: 1,372
Region Association: MidAtlantic Region
QUOTE(Eric_Shea @ May 15 2013, 04:34 PM) *

QUOTE
Beginning to be as bad as Dr Evil


Send those to Evil... he can weld them up for ya! (IMG:style_emoticons/default/w00t.gif)

Nope, I am out of argon........prick. (IMG:style_emoticons/default/dry.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MDG
post May 16 2013, 08:50 AM
Post #39


Wolf in wolf's clothing.
*****

Group: Members
Posts: 8,652
Joined: 3-February 09
From: Toronto
Member No.: 10,018
Region Association: None
QUOTE(Eric_Shea @ May 15 2013, 04:34 PM) *

QUOTE
Beginning to be as bad as Dr Evil


Send those to Evil... he can weld them up for ya! (IMG:style_emoticons/default/w00t.gif)


(IMG:style_emoticons/default/mellow.gif)

(IMG:style_emoticons/default/w00t.gif)


(IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/lol-2.gif) (IMG:style_emoticons/default/av-943.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Nov 21 2013, 07:38 PM
Post #40


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
I was making good progress, but work got in the way. Now I'm hoping to have both my bug and 914/6 project done for the spring. But I do have several jobs for others that have to be done as well.

This is my progress on my ITB project. this was originally for my 914 but now it's going in my 67 bug.


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

4 Pages V < 1 2 3 4 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 24th November 2024 - 01:00 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...