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General Category >> Rubber Side Down! >> Re: Blown Savage in a speedway racer? Crazy talk!!
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Message started by batman on 05/08/18 at 20:59:56

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by batman on 05/08/18 at 20:59:56

So are you building a board track to run it on ? Or do you think it's ok to run a blown motor on the open road ,with no rear suspension ? I guess I'm a "form follows function " kind of guy with a bike that I can ride a couple of thousand miles , rather than a couple of blocks . If your going to build a motor with that much power, you need a suspension that keeps the rubber on the road. A hard tail won't cut it.

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by ohiomoto on 05/09/18 at 09:19:44

I'll be watching because I love the look of the 34 Crocker. Don't really give two craps about the blower other than it's cool if that's what you want, but you could dump a 3.5 hp Briggs in that thing and I would think it's cool. I probably wouldn't want to ride it to work every day, but still cool.

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by ohiomoto on 05/09/18 at 09:25:30

And the only reason I say I wouldn't ride to work every day is that I ride 30 miles each way. Come to think of it, I couldn't stand my Savage (before I modified it) after 30 miles either. Maybe I should move a little closer. haha

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by DieselBob on 05/09/18 at 11:36:02

First the disclaimers.
1. Not my area of training
2. My supercharger's on a twin. So, can't speak from experience.
3. Some of what I "know" was learned on-line. And well................

As a positive displacement pump, the AMR300 delivers a constant supply of boost that can't be stored between intake cycles in the absence of a plenum, and would thus require a pressure relief valve or result in cavitation within the pump. Depending on who's research you believe, a single requires plenum capacity somewhere between 3 and 5 times the engine displacement to avoid the inevitable pulse effect.

Don't we need a plenum/accumulator here for this application? That said, don't let my questioning deter you from forging ahead. I love what you're going for. Can't wait to see the finished bike.

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by DragBikeMike on 05/09/18 at 12:50:57

Looks like a mighty cool project Track Racer. You also have the benefit of all that hard work and trial & error that Savage Bob put into his boosted beast. I love you guys. Your game for anything. I'm looking forward to watching your masterpiece take shape. The preliminary work on the engine and blower looks mighty fine.

That timing plug is not centered on the alternator bolt. How did you machine the cover such that the bearing fit is concentric & perpendicular to the crankshaft? Is the cover thick enough in that area to accommodate the bearing or did you have to weld build-up the interior. By any chance, do you have any photos of the custom stub shaft/bolt assembly, machined cover, sealed bearing, etc.?

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by batman on 05/09/18 at 17:31:16

"Savage Bob did the heavy lifting" ,True but I'm not sure you should follow him down the rabbit hole . He did tend to make a few mistakes. To high a compression ratio for one, and a blowoff valve that never opened . (set for 15psi and he estimated he was running 10psi boost). One might consider a bit of research in to blown dragster motors ,some of these large motors put out 3000 hp which is achieved by running high boost pressures on motors who's combustion ratios are only 5: 1. Lowering combustion ratio allows you to run more boost and make more hp. without exceeding 10.5 -11.5 :1 compression under full boost and therefore not creating ignition temperatures that our air cooled motor can't handle .(detonation/overheating ).

Title: Re: Batman says it won't work so project is shut d
Post by Gary_in_NJ on 05/10/18 at 09:13:59

That escalated unnecessarily. A supercharged custom is certainly a cool project. Seeing how you are a new member, it seemed to me that Batman was simply alerting you of several known shortcomings of the LS650. But that's the fun of a custom project, overcoming technical problems with innovative solutions. There have been a number of recent projects that have stretched the envelop of what seems possible with the budget LS650/S40. Much can be accomplished with unlimited talent and funding. I look forward to reading about your progress and how you resolve the inerrant shortcomings and budget constraints of the original design.

Title: Re: Batman says it won't work so project is shut d
Post by justin_o_guy2 on 05/10/18 at 11:29:26

firmly believe I am too old and have put with with enough junk from people that I no longer must suffer fools lightly, and I will not.

I'm 63. I'm really good at a few things. When someone tries to pretend I'm not what I know I am, I'm not so patient now.
Do your thing.

Title: Re: Batman says it won't work so project is shut d
Post by batman on 05/10/18 at 12:56:52

My comments were advice , made to help guide you to build a motor that would run at any speed ,with max hp,and not overheat. I never said it couldn't be done. I offered my opinion about running a hardtail thinking that the roads of WI may not be any better than those of any other state that sees hard winters in an effort to see that you might survive riding the bike. you can choose to ignore anything I've said, , My comments may have been blunt , but they weren't misleading. I wrongfully assumed being a Newbie ,that you were not aware of. the basic problems of to high a compression ratio with to much boost, (which I believe is Savage Bob's problem)perhaps if you had given us some idea of your age and background this misunderstanding could have been avoided (your bad).good luck on your project!

Title: Re: Batman says it won't work so project is shut d
Post by hotrod on 05/10/18 at 19:56:05

As Savage riders and builders, we're all on the right side. Let's get a cold one.

Title: Re: Batman says it won't work so project is shut d
Post by Ruttly on 05/10/18 at 20:47:25

3F2026213C3B0A3A0A32202C67550 wrote:

I'm 63. I'm really good at a few things. When someone tries to pretend I'm not what I know I am, I'm not so patient now.
Do your thing.

Yeah ,really really good at chicken rustlin !!!

Title: Re: Batman says it won't work so project is shut d
Post by justin_o_guy2 on 05/11/18 at 00:45:49

Well, yeah, that is one of my many talents.
Hey! You weren't being nice,
You can get your own supper.

Title: Re: Batman says it won't work so project is shut d
Post by Dave on 05/11/18 at 03:23:53

I would like to see the thread returned to a state of "normality".

How about track racer returning his title to what it was originally, and I can delete all the posts that are not constructive or related to the build topic.

We can begin this thread again knowing that track racer is not a novice and is aware that he is building a "project" bike that is not going to be a "touring" bike....and that he does have other bikes to use when he wants to go riding.

track racer can then continue documenting his build without the distractions that occurred in the first few posts.

Title: Re: Batman says it won't work so project is shut d
Post by IslandRoad on 05/11/18 at 04:03:51

456C6060687F3C0D0 wrote:

As Savage riders and builders, we're all on the right side. Let's get a cold one.

^^ What he said!

Title: Re: Batman says it won't work so project is shut d
Post by IslandRoad on 05/11/18 at 04:05:15

774C4156474B50564D454857240 wrote:

Nah! leave it as it is man (ok, maybe change the title back), that's just the rough and tumble of the Interwebs!

Title: Re: Batman says it won't work so project is shut d
Post by track racer on 05/11/18 at 05:07:53

567F73737B6C2F1E0 wrote:

As Savage riders and builders, we're all on the right side. Let's get a cold one.

Yup I agree. My cold one is in another forum and I'm buying!!!!!

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by ohiomoto on 05/11/18 at 06:21:37

I'm with Dave. Clean this thread up. Any post that doesn't have "34 Crocker" in it needs to go. ;)

Title: Re: Batman says it won't work so project is shut d
Post by Ruttly on 05/11/18 at 06:47:33

2E3137302D2A1B2B1B23313D76440 wrote:

Well, yeah, that is one of my many talents.
Hey! You weren't being nice,
You can get your own supper.

Sorry JOG , I'm still learning to play well with others !

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by Ruttly on 05/11/18 at 06:55:37

Hey Dave heated discussions are part of it , makes for excellent reading. No harm no foul. Kinda thought I was reading some of my stuff , he has a way with words doesn't he ? ;D ;D ;D

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by ohiomoto on 05/11/18 at 08:06:01

Looks like track racer took his ball, err, bike and went home. :(

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by ohiomoto on 12/14/20 at 06:46:13

Track Racer did it. They dropped they booster, but it is an outstanding build!

Thanks goes out to Sandmanred for point it out to me.

https://revivalcycles.com/homegrown/Steve-Olds-Savage-Speedway

http://https://d22uovayqj8stx.cloudfront.net/Articles/1600x1064_P8_Handbuilt-Homegrown-Steve-Olds-Savage-Speedway-04.jpeg

Title: Re: Blown Savage in a speedway racer? Crazy talk!!
Post by Edub on 12/16/20 at 14:31:13

Thanks for posting this, Ohiomoto! I missed the fighting, but I'm really happy to see the finished bike. Beautiful work!