| Author |
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Berkshire
| | Posted on Friday, May 30, 2008 - 01:47 pm: | 
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I saw one on ebay a couple days ago... |
Reuel
| | Posted on Friday, May 30, 2008 - 01:58 pm: |
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Now my wife's giving me a hard time. I'm going to have to get one on the sly somehow. Ebay is a bit hard to cover up.  Maybe I'll tell her it's cracked.
I can get a 48mm throttle body. I'm thinking it should work fine, since the fuel is going to be injected after the throttle plate.
(Message edited by reuel on May 30, 2008) |
Crackhead
| | Posted on Thursday, October 23, 2008 - 10:28 am: |
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have you looked into harley efi systems? I would think the harley throtal body would adapt easly, also the knock sensor should work, along with the map sensor. i am not aware of a maf sensor that will work at the very low air flow levels of the blast (1/4 throtal)
(Message edited by crackhead on October 23, 2008) |
Reuel
| | Posted on Thursday, October 23, 2008 - 04:27 pm: |
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Winter is coming, so I'll be spending a lot more time on this project. I have a lot more of what I need to make it happen, too. All I'm lacking is an injector at this point. I'll definitely look into what they have. |
Crackhead
| | Posted on Friday, October 24, 2008 - 07:27 am: |
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What are you useing as a tb? unfortunaly gutting the carb wouldn't work easly bc it is laking an IAC.
But almost any small tb would work. i would say under 50mm, otherwise the throttle responce would be to great at low throtal applications.
Have you looked into the length of the intake? i think around 17-18inches would but the ideal length around 5k rpms. Wraping around behind the engine is probly the only way to get that length. |
Reuel
| | Posted on Friday, October 24, 2008 - 07:22 pm: |
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I have a source for a 48mm Chrysler 4 banger TB. What's an IAC? Why such a long intake?
I'm learning a lot of stuff here, which means I don't know everything, so the first attempt or 3 may not work well. |
Swampy
| | Posted on Friday, October 24, 2008 - 09:27 pm: |
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IAC, Idle Air Control. An air valve used to control engine idle speed when engine load increaases at idle. Usually an electric stepper motor. Probably would not be necessary on a motorcycle. I don't think any of the FI Buells have them.
The long intake would greatly improve throttle response. How long you ask? Just enough to touch the ground.....I am a believer taht the velocity stack that Ezblast uses does just that. Try placing a simple cardboard tube to the front of the carb while running and crack the throttle. |
Ezblast
| | Posted on Friday, October 24, 2008 - 10:32 pm: |
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The chuff sound I get when I shut off either bike is cool!
EZ |
Reuel
| | Posted on Friday, October 24, 2008 - 10:38 pm: |
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So, does the long throat go before the throttle plate, or between the throttle plate and the intake? |
Swampy
| | Posted on Saturday, October 25, 2008 - 09:05 pm: |
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At the carb inlet. I would think that if you intorduced a longer tube between the carb and the head there might be a bit of fueling problems being farther away from the vacuum source.
There is a thing called a....um, I forgot, crap I didn't bookmark it, it is made by Scary Fast Products, it is placed in the inlet of your carb and is a single blade that divides the airflow top and bottom, the bottom half is where you get your throttle response from as that is where the first portion of the slide goes up.
http://parts.motorcycle-superstore.com/1/1/8835-po wer-scary-fast.html |
Ezblast
| | Posted on Saturday, October 25, 2008 - 10:25 pm: |
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http://scaryfastracing.net/harley.html
hmmmm - so what does it do to top end hp - is there a decrease?
120 bucks - what harm is it - is this really a win/win situation? Is it worth the money?
EZ |
Swampy
| | Posted on Sunday, October 26, 2008 - 12:21 am: |
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I believe all it does is simulate a longer smaller intake trac that increases air velocity through the carb at lower engine RPMs which will keep that low RPM bog from occuring.
Being a thin blade it probably will not hurt the higher RPM air flow. |
Crackhead
| | Posted on Sunday, October 26, 2008 - 02:54 pm: |
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the length and diameter of the intake affects the harmonics and air velocity. At a certain length/ diameter/ rpm there is a natural harmonics were more air is shoved into the combustion chamber then would occure then without the harmonics.
For your first attempt, don't worry about the intake length, until every thing is running.
the velocity stacks sort of have the same effect as increasing the intake length but only at full throtal were the butterfly and slide are not in the way. The Pro series/ longer air cleaners would be better bc it would have a longer intake track at wot.
the mopar tb should have a iac built in. and the microsquirt should be able to control it. |
Ezblast
| | Posted on Sunday, October 26, 2008 - 06:31 pm: |
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So if I built a divider that stuck into the carb body from the stack - I could perhaps get the best of both worlds?
EZ |
Crackhead
| | Posted on Sunday, October 26, 2008 - 08:25 pm: |
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ez
i am not sure how effective having a dual stage intake would be. i don't know how much air flow disruption the carb causes.
also, is the carb is narrower then the intake manifold? i don't know how that would affect the harmonics.
All of the intake knowledge comes from EFI cars. Mostly from the SHO Taurus and the 3.0 durtec. They has 2 different intake tracks per cylinder.
The short fat intake has a butterfly that doesn't open until after 3.5k (i think) which basicaly converts it from a 4valve into a 3 valve.
The long runner is active all the time, and at low rpms it is the only runner. The reason is to increase intake velocity. Thus, increasing cylinder fill.
The heads on the blast are only 2 valve correct? is there a 4 valve head available?
I just purchased my 06 blast (under 1k miles), so i am not up to the full knowledge basis yet. I am thinking about making my own aircleaner piping with a longer length then the pro series, and having the filter mounted behind the engine. |
Swampy
| | Posted on Sunday, October 26, 2008 - 09:36 pm: |
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Two valves.....unfortunately.
The SHO uses two intake tracks, I beileve it is either a three or four valve head, one track is short, for the higher rpm ranges, the other is long and narrow for the low RPM low throttle opening.
What the Scary Fast thing does is makes a narrower intake track at the carb opening during low throttle opening conditions, it helps throttle response. |
Ezblast
| | Posted on Sunday, October 26, 2008 - 11:29 pm: |
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my question is - is there a negative - like in the Torque Stuffers - where you get power down below at the expense of top end - I was told this design is developed for bottom end, yet has no adverse affect on top end - is that true?
EZ |
Swampy
| | Posted on Sunday, October 26, 2008 - 11:42 pm: |
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It will help low end throttle response, It probably will not hurt top end either as all you are introducing into the air flow is a thin vane that just sits there and not restrict flow. |
Crackhead
| | Posted on Monday, November 03, 2008 - 09:01 am: |
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This looks like it would have majority of the electronics you would need.
http://cgi.ebay.com/ebaymotors/Parts-Accessories_M otorcycle-Parts-Accessories__BUELL-XB-LIGHTNING-FI REBOLT-THROTTLE-BODY-INJECTION_W0QQitemZ3800768789 63QQddnZPartsQ20Q26Q20AccessoriesQQadnZMotorcycleQ 20PartsQ20Q26Q20AccessoriesQQddiZ2811QQadiZ2863QQc mdZViewItem?hash=item380076878963&_trkparms=72%3A5 43%7C39%3A1%7C65%3A12%7C240%3A1318&_trksid=p4506.c 0.m245 |
Reuel
| | Posted on Monday, November 03, 2008 - 12:57 pm: |
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That would likely be perfect. Just wish I had the money. I'm tapped right now... |
Crackhead
| | Posted on Tuesday, November 04, 2008 - 07:58 am: |
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there is a few things i would change from the xb setup. Cut off the extra mounting for the rear head, cut extend and turn the intake, so it would be completely out of the way of my knee. |
Ezblast
| | Posted on Thursday, November 18, 2010 - 12:54 am: |
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http://www.buelletinboard.com/forums/showthread.ph p?t=9228
The story of the FI Blast - how to, etc, plus the mods to make a Dirty Blast as well - lol - this guy really thought out his modifications. Its a really cool Buell that used to be a Blast - a real Dark-sider! This could be done with a regular Blast as well. Just a thought folks - it is doable. And basically hears how!
EZ |
