 My turn at motorcycle Throttle bodies, making progress |
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| Mark Henry |
 May 10 2013, 10:57 AM
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#1
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that's what I do!  Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada  |
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 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) Attached image(s) 
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Replies(60 - 73)
| SirAndy |
May 14 2014, 11:48 AM
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#61
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Resident German Group: Admin Posts: 41,641 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Mark Henry @ May 14 2014, 10:24 AM)  It's alive (IMG:style_emoticons/default/thumb3d.gif) (IMG:style_emoticons/default/first.gif) |
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| Moneypit |
May 14 2014, 01:04 PM
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#62
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Member Group: Members Posts: 195 Joined: 4-January 06 From: Georgetown, TX Member No.: 5,360 Region Association: Southwest Region |
Pardon my noobiness, but as I understand this, using ITBs such as these let you get some of that sweet 44IDF style induction sound, but with the power/tunability of FI ala Megasquirt or something, right? Or is there more that I am missing like a MAF, TPS, etc?
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| Mark Henry |
May 14 2014, 08:28 PM
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#63
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
More than just the sound, on an engine my size (102mmX 78mm) it's a major power boost.
My system is SDS but it would work on most aftermarket EFI like MS. Yes it has MPS, TPS and crankfire ignition, etc. |
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| crash914 |
May 15 2014, 02:52 AM
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#64
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its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Looks good Mark...very similar to my motor...103 x 80. I just finished the first full throttle runs and tuning last night...what a sound at full throttle! Scary fast...I think you will be pulling the front wheels at launch....enjoy!
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| bulitt |
May 15 2014, 05:04 AM
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#65
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Achtzylinder Group: Members Posts: 4,188 Joined: 2-October 11 Member No.: 13,632 Region Association: South East States |
Wow (IMG:style_emoticons/default/smilie_pokal.gif)
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| MrHyde |
May 15 2014, 06:14 AM
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#66
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Senior Member Group: Members Posts: 525 Joined: 13-October 10 From: Ontario, Canada Member No.: 12,268 Region Association: None |
Awesome Mark !!! I'm gonna have to come up and have a lookie.. And I agree with the wheelie bar comment.. might be needing that. :-)
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| rhodyguy |
May 15 2014, 07:39 AM
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#67
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,080 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
the fuch wheels look sharp on your t1.
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| Mark Henry |
May 15 2014, 08:23 AM
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#68
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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 don't think it will need wheelie bars, she's designed to run flat and fast. It has 195's street tires on the rears, pretty sure they would break loose first.
The transmission is not built for drag racing, it's a 901-911 5-speed with stock 914 gearing. I'm using a Weltmeister short shift plate and all my bushings are new, but I can't believe how smooth it's shifting. Very short throw. Fresh rebuilt at the clinic last year. Real nice going down the 401 highway at 80mph and 3000RPM (IMG:style_emoticons/default/shades.gif) Took a bit to sort through linkage and TB sync but I'm 95% there on that. Still sorting though the SDS EFI mapping, it runs real smooth but I still have to tweak the mix knob for hard acceleration. Engine temps look good but running really cool on the heads, That might be the nickies. My injectors may be a bit too big at 55lbs (Siemans Deca) running only 15% duty cycle at cruise and don't even hit over 50% at full loud pedal. But it seems to run smooth Lots of power for sure. (IMG:style_emoticons/default/w00t.gif) |
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| Qarl |
May 15 2014, 08:24 AM
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#69
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Shriveled member Group: Benefactors Posts: 5,233 Joined: 8-February 03 From: Florida Member No.: 271 Region Association: None  |
Post a video of it running... (and some throttle blips).!!!!
Pretty please |
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| Moneypit |
May 15 2014, 09:05 AM
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#70
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Member Group: Members Posts: 195 Joined: 4-January 06 From: Georgetown, TX Member No.: 5,360 Region Association: Southwest Region |
This is now relevant to my interests... I have carb cams but didn't want to ditch the IDFs because I love the sound, but I'm going to be watching this with great interest if it is something that could someday be "templatized".
Would anyone consider making some diagrams or templates for any parts that would need to be fabbed? I was thinking that if I ever do go down this road, it would be neat if I could print off plans for any brackets, adapters, and linkage bits I'd need, as a good friend of ours works in welding and fabrication. I'd also like to see the nitty gritty of getting this type of setup to work with Megasquirt, such as how the TPS, MAF, and all the other sensors needed would be set up. |
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| Mark Henry |
May 15 2014, 10:52 AM
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#71
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Everything on this build is custom, between the engine and the car I'm betting 1500 hours.
Your friend is either going to bail on you, hate you or start charging you money. I'm guessing, but I have at least 120 hours in the TB's alone. I didn't make templates. At first things went fast enough that I thought about making and selling a few sets, but I |
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| Moneypit |
May 15 2014, 11:41 AM
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#72
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Member Group: Members Posts: 195 Joined: 4-January 06 From: Georgetown, TX Member No.: 5,360 Region Association: Southwest Region |
QUOTE(Mark Henry @ May 15 2014, 11:52 AM) Everything on this build is custom, between the engine and the car I'm betting 1500 hours. Your friend is either going to bail on you, hate you or start charging you money. I'm guessing, but I have at least 120 hours in the TB's alone. I didn't make templates. At first things went fast enough that I thought about making and selling a few sets, but I If anything my Friend would show me how to do things, not just do all the work. If I discover things deeply out of my pay grade I'd pay him. That, and there's a pretty solid welding/fabbing/machining presence up in this area. If I gan get back into 3d design stuff like CAD (used to use 3DS Max for game models), maybe someone can print them out on a 3d printer. If everything mates properly, then CNC out of aluminum? (IMG:style_emoticons/default/confused24.gif) I figure this all would involve a lot of machining, especially in trying to get the TBs to align with and mate to the intakes, and especially getting the linkages sorted out! Then of course there's the fuel rails that would need to be correct for the TB's spacing, am I right? I see the issue of having to fab everything up. In terms of the linkages, is it extremely complicated getting each pair of TBs slaved to each other? I was trying to think if you could rig up a system similar to Tangerine's pulley/slave style and have a TPS on the "master" TB? |
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| crash914 |
May 15 2014, 11:48 AM
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#73
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its a mystery to me Group: Members Posts: 1,826 Joined: 17-March 03 From: Marriottsville, MD Member No.: 434 Region Association: MidAtlantic Region |
Mark, I am using 30# per hour injectors in mine...max out at 85% duty cycle...like you said, most of the time the duration of squirt is very small...
My motor is megasquirt...the linkage I am using now is Chris's cable linkage...a little touchy to set up but a big improvement over the hex bar.. Throttle bodies are readily available TWM, Jenvey or Weber.... |
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| Mark Henry |
May 15 2014, 03:01 PM
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#74
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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(Moneypit @ May 15 2014, 01:41 PM) QUOTE(Mark Henry @ May 15 2014, 11:52 AM) Everything on this build is custom, between the engine and the car I'm betting 1500 hours. Your friend is either going to bail on you, hate you or start charging you money. I'm guessing, but I have at least 120 hours in the TB's alone. I didn't make templates. At first things went fast enough that I thought about making and selling a few sets, but I If anything my Friend would show me how to do things, not just do all the work. If I discover things deeply out of my pay grade I'd pay him. That, and there's a pretty solid welding/fabbing/machining presence up in this area. If I gan get back into 3d design stuff like CAD (used to use 3DS Max for game models), maybe someone can print them out on a 3d printer. If everything mates properly, then CNC out of aluminum? (IMG:style_emoticons/default/confused24.gif) I figure this all would involve a lot of machining, especially in trying to get the TBs to align with and mate to the intakes, and especially getting the linkages sorted out! Then of course there's the fuel rails that would need to be correct for the TB's spacing, am I right? I see the issue of having to fab everything up. In terms of the linkages, is it extremely complicated getting each pair of TBs slaved to each other? I was trying to think if you could rig up a system similar to Tangerine's pulley/slave style and have a TPS on the "master" TB? If you're paying just go for the Weber Or CB TB's, they are a bolt on. Basically I made everything, saved me a boatload of coin, but that's not counting the time. $80 for the TB's (ebay), the manifolds were free, $48 for the linkage ends (FLAPs) and $50 for the air filter assemblies (cip1) and $50 for the injectors (ebay). Say about $100 for FI hose, clamps and fittings, etc. Pump is from a VW van, the oil filled pump pressure gauge cost me $15 Most of the rest I had kicking around (just taking about the intake here). I bought the SDS almost 10 years ago it had the TPS, MAP, etc. The O2 meter is about 6 years old I've used it on many cars. |
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