| Author |
Message |
    
Aaron
| | Posted on Sunday, May 18, 2003 - 10:24 pm: | 
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1999 M2 owned by yours truly
NRHS Stage 3 XB heads (with 30 degree chamber and 1.9" intake options)
NRHS bolt-on 1250 kit (with 30 degree option)
Red Shift 585 cams
JIMS Hydrosolid lifters
NRHS Hurricane pushrods
S&S roller rocker arms
NRHS Signature Series exhaust system w/baffle
Mikuni HSR45 carburetor
Crane HI-4E single fire ignition module and coil
This isn't anything exotic, this is regular stuff available to anyone. This motor has 11:1 compression and the pull was done on pump gas. This bike is totally streetable. I've never split the cases on this motor, it still has a totally stock & original bottom end.
There's no extra charge at Stage 3 for the 30 degree chamber work or the 1.9" intake valve options.
Brian has really been doing his homework on XB heads. He likes the raised floor in the intake port, and he reworks the rest of the port to work with that floor (at least one major head porter is removing the floor and doing their old port design). Plus the bathtub chamber provides enough material to do the shape he wants.
(Message edited by blake on May 27, 2003, %time) |
Hoser
| | Posted on Monday, May 19, 2003 - 12:38 am: |
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That's an impressive package , I particularily like like flat torque curve . Even lazy shifting puts the rpm near the torque peak.
I wish I could have done more with the S2 , it still has the fat flywheels and the 29 tooth pulley too. I did it on a budget in the midst of other projects and commitments but still happy with the result and the cost.
The thunder twins racer I'm involved with has a budget that allows for modifications like the late flywheel conversion and fancy valve train parts , oiling mods , windage tray etc.
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Aaron
| | Posted on Monday, May 19, 2003 - 01:14 am: |
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I think you did a hell of a job with that S2, especially considering you did it for not a whole lot of money.
We put those late pressed flywheels into a lot of motors, and we almost always do a windage tray at the same time. It's a nice setup, pretty light and it seems to be up to the job, even on 88 inchers.
I thought long and hard about doing this motor that way and possibly taking it to 88" at the same time, but in the end, I decided it's more important to show what can be done without opening the cases. That's a bigger market.
I have another motor sitting around that I may build up to 88" for kicks, maybe put it in Susy's S1. I'd do it at 80" and race in the 1350cc class at Bonneville if I could get my hands on one of those unobtanium 3.6" stroke cranks. But that ain't likely to happen anytime soon  |
Peter
| | Posted on Monday, May 19, 2003 - 02:07 am: |
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Aaron,
NICE!
Now go back and squeeze that last 0.4hp out of it  |
Aaron
| | Posted on Monday, May 19, 2003 - 08:34 am: |
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Tell you what Peter, that PISSED me off so much you can't believe it. Just about the moment I did this pull, we had a big rainstorm come in and the humidity jumped way up and I lost about 1hp that I never got back. I had a couple other pulls over 119 and then all 118's after that. Sigh, another time. All I need is a warm dry day. Or take some Nutec with me next time, but that's kinda cheating  Besides, that stuff gums up the chambers and plugs like crazy. |
Henrik
| | Posted on Monday, May 19, 2003 - 09:20 am: |
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... that PISSED me off so much you can't believe it ...
Ohhh Aaron - we believe it 
Great looking chart none the less. Fun ride I bet.
Henrik |
Sarodude
| | Posted on Monday, May 19, 2003 - 10:08 am: |
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Aaron-
That is NICE. I hope lotsa XL folks are looking at NRHS' packages!
-Saro |
Redstripe
| | Posted on Monday, May 19, 2003 - 10:32 am: |
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Hoser,
I got pretty much the same results from my x1. Had just about the same sort of modifications done to it, bar the pushrods.
Had to replace mine for adjustable Zippers because of the squish on the rear cilinderhead, it was wayyyy off, so Charley had to mill the casting down to finer tolerances.
Engine pulled 97 rwHp and 112 rwNm. -exquise the metrics-
I have thought of mounting the x1 with a HSR 42 kit, but am not willing to sacrifice the self-adjustment of the injection because of vacations abroad. -read height differences- Holland's a pretty flat place, You know!?
I am now contemplating a bigger bore for the throttle body of the injection? AW suggested that the power seems to be capped because of the air that can be taken in on the injection of the x1.
Anybody any comments or experiences on that?
Jilles.
PS. Results are posted one or two pages back. |
Aaron
| | Posted on Monday, May 19, 2003 - 12:09 pm: |
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"Ohhh Aaron - we believe it"
Hey! What's that supposed to mean?
I shoulda mentioned above, but the M2 has Total Seal Gapless top rings. I like hooking up the leak down tester and seeing 1% readings. Not sure I'd recommend'em for everyone though, they create a bit of a balancing act with the valve guide seals. Seals that work fine with conventional rings may make a motor smoke like a chimney with Gapless rings, but seal'em up too tight and you may gall the valve stem or worse stick a valve. So there's a learning curve to using them successfully. |
Jmartz
| | Posted on Monday, May 19, 2003 - 03:07 pm: |
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Aaron:
You mention above the cam lift is .58 inches. What seat pressure are you using, 175 lbs.? Have the hollow valves arrived? Presumably less spring force would be needed with those. |
Aaron
| | Posted on Monday, May 19, 2003 - 03:42 pm: |
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I've got about 200lbs on the seat, which is probably a little more than they really need. No hollow stem valves yet unfortunately, hopefully it won't be much longer. |
Polekat
| | Posted on Monday, May 19, 2003 - 04:08 pm: |
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Aaron, With those modifications would kind of MPG figures would be expected on the street and riding reasonably :-) ? |
Aaron
| | Posted on Monday, May 19, 2003 - 04:48 pm: |
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I haven't checked it yet so all I can do is speculate at this point.
It's been my experience that performance mods tend to help mileage, though. For example my FXR's mileage jumped from high 40's to 55ish when I bumped it from 58rwhp to 86rwhp. My S2 with 87rwhp rarely falls below 50mpg.
Thinking about it logically, a person would expect the additional compression and the chamber work to help efficiency. But then again, the rpm where this motor is breathing it's best has been moved up, where there are more frictional losses. I don't know, I guess we'll see. |
Polekat
| | Posted on Monday, May 19, 2003 - 05:52 pm: |
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Aaron,
Thanks for the information. I'm thinking about adding performance up grades to my 2002 m2. |
Jim_witt
| | Posted on Monday, May 19, 2003 - 07:32 pm: |
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Aaron mentioned:
I had a couple other pulls over 119 and then all 118's after that. Sigh, another time. All I need is a warm dry day.
Dude,
Send it down to Phoenix and I'll see what it will pull for ya.
-JW:> |
Blake
| | Posted on Tuesday, May 20, 2003 - 04:32 am: |
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Keith's Dyno Results... We hope to confirm that holes in the airbox lid (not the outer cover) will produce similar results to the open airbox run. Hopefully it will. Have heard that it does from others. I wonder what it would do to a stock machine's performance? Really surprising that it makes such a HUGE difference. I never would have suspected the intake was a limiting factor. Something goofy seems to be going on there with the stock setup.
Stock versus Race ECM/Race Intake/D&D Muffler versus Race ECM/Open Intake/D&D Muffler
Notice the huge improvement at ~4,700 RPM. The bike is up approximately 10 FT*LBs and 10 RWHP compared to stock, almost a 20% improvement!
Kinda funny Aaron hasn't said anything about this. Aaron, did you modify the airbox for your XB12 dyno runs, other XB9 runs?
(Message edited by blake on May 20, 2003, %time) |
Reepicheep
| | Posted on Tuesday, May 20, 2003 - 09:06 am: |
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Wasn't there a little buzz around here for a while with people looking / waiting for / announcing a new force intake for the XB? At the time I was thinking "why bother" as my force upgrade was cosmetic only. Now perhaps I understand why everyone is so excited.
I also remember reading in a Cycle World "Harley Performance" special edition (comes out once a year around Christmas and is awsome) before the XB was released some "official factory leaks" that suggested the stock airbox volume was good for up to 110 or so horses... but this does not necessarily mean the stock air filter is good for that much.
Anybody able to post some pictures so that us tuber types can see the "cover" being discussed?
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Noface
| | Posted on Tuesday, May 20, 2003 - 04:23 pm: |
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Blake,
Is the above chart with the K&N or stock paper element?
Also, got any pics of the mods made to the cover?
thnx,
Jody S. |
Blake
| | Posted on Tuesday, May 20, 2003 - 04:34 pm: |
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Race Intake = K&N filter
No mods have been made to the lid yet. The blue run was made with the lid removed. |
Martin
| | Posted on Tuesday, May 20, 2003 - 05:17 pm: |
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Sorry if this is a question others have answered before, but what is the part no. for the Xb9 K&N as everyone in england denies its existence? |
Ar15ls1
| | Posted on Tuesday, May 20, 2003 - 05:40 pm: |
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I already cut 2 large holes in the front of the black airbox. Just dont go to big or you will cut into the filters seal. I will also do what Blake said and drill a bunch of small holes in the rear of the box. this should help keep some rigidity in the box. |
Bud
| | Posted on Wednesday, May 21, 2003 - 11:24 am: |
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Stupide question ;
how do you measure the effect of the ram air intake on a dyno ?
And how can you measure the loss off it on the when you drill holes in the airbox ?
Looks to me that every bike run with out an air filter will produce more HP on a dyno
Gr, martin
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Glitch
| | Posted on Wednesday, May 21, 2003 - 11:48 am: |
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Stupide question
The only stupid question is he one you don't ask...You can use a powerful fan aimed at the ram air intakes, although this is not a problem with the XBs as they aren't ram air charged...
(Message edited by Glitch on May 21, 2003, %time) |
Hootowl
| | Posted on Wednesday, May 21, 2003 - 11:57 am: |
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Aimed at no one in particular, and at everyone's funny bone...
Remember, there are no stupid questions, only stupid people.
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Blake
| | Posted on Wednesday, May 21, 2003 - 02:55 pm: |
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Bud,
The Buell intake is NOT a ram air intake despite what the marketing hype claims. It is not even a contiguous duct. Even if it were a ram air intake, optimally designed ram air does not become effective until speeds reach well into triple digits. |
Bud
| | Posted on Wednesday, May 21, 2003 - 04:12 pm: |
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OK,
That clears thing out,
Ill get my hole cutter and have some fun with it
Always in for some free pony’s  Hoping that the scale will tip over to the 80’s
( only racekited, last tested 78 rwhp)
gr,m
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Aaron
| | Posted on Saturday, May 24, 2003 - 05:14 pm: |
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Okay, I can relax now ...
We tweaked on it some this week. It was noticeably better. It's very first pull was 120.1 an in 9 pulls only one dropped below 120, and it was 119.9. I can live with that, for now.
Again for those who missed it last Sunday...
1999 M2 owned by yours truly
NRHS Stage 3 XB heads (with 30 degree chamber and 1.9" intake options)
NRHS bolt-on 1250 kit (with 30 degree option)
Red Shift 585 cams
JIMS Hydrosolid lifters
NRHS Hurricane pushrods
S&S roller rocker arms
NRHS Signature Series exhaust system w/baffle
Mikuni HSR45 carburetor
Crane HI-4E single fire ignition module and coil
This isn't anything exotic, this is regular stuff available to anyone. This motor has 11:1 compression and the pull was done on pump gas. This bike is totally streetable. I've never split the cases on this motor, it still has a totally stock & original bottom end.
There's no extra charge at Stage 3 for the 30 degree chamber work or the 1.9" intake valve options.
|
Court
| | Posted on Saturday, May 24, 2003 - 06:36 pm: |
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120?
Aaron, the things you have done with that BLAST are incredible.
Talk to you soon! |
Jprovo
| | Posted on Saturday, May 24, 2003 - 07:12 pm: |
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Aaron, the things you have done with that BLAST are incredible
LOL
one can only dream... Buell Supermono
James} |
Aaron
| | Posted on Saturday, May 24, 2003 - 09:01 pm: |
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BTW, we had an RC51 on the dyno just before my M2. My M2 made more |
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