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| S1 tuning https://ukbeg.com/forum/viewtopic.php?f=7&t=1491 |
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| Author: | shudnobeta [ 07 Jul 2009 19:09 ] |
| Post subject: | S1 tuning |
I believe S1's can't have their ecm mapping changed because they ain't got one. But is there any other method of tuning that electrikery stuff. Since Tubbs did an excellent up-grade the engine, the characteristics are certainly faster - at top end, but it has probably lost a little bottom end. Can this be tinkered with - presumably on a dyno - to change it so it is lower in the rev range. 
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| Author: | paulalig [ 07 Jul 2009 19:32 ] |
| Post subject: | Re: S1 tuning |
 Put Sportster cams in it if you want bottom end!
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| Author: | thorkill the tall [ 07 Jul 2009 21:20 ] |
| Post subject: | Re: S1 tuning |
Shuds, smash your piggy bank and get yourself a Crane single-fire ignition module. Remember though, you won't be able to get one of these for three ha'pence and a bag of chittlings,. Unless, of course, it's a very big bag of chittlings.......... |
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| Author: | shudnobeta [ 07 Jul 2009 21:24 ] |
| Post subject: | Re: S1 tuning |
thorkill the tall wrote: Shuds, smash your piggy bank and get yourself a Crane single-fire ignition module. Remember though, you won't be able to get one of these for three ha'pence and a bag of chittlings,. Unless, of course, it's a very big bag of chittlings.......... I remember checking out crane ignition a while back and from what I could surf-out it didn't make a big difference. So it improves bottom end  ........ I haven't got any chittlings, its just the way I walk - boom boom 
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| Author: | Spook [ 08 Jul 2009 09:34 ] |
| Post subject: | Re: S1 tuning |
I have a 42mm Mikuni and Crane H14 on my X1. You are welcome to give it a blast at East Kirkby if your going Shudders. This is a polite genuine offer as I'm just about to comment on your video 
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| Author: | coz [ 08 Jul 2009 19:05 ] |
| Post subject: | Re: S1 tuning |
ive done - in this order mikuni 42mm carb race filter race headers and silencer crane single fire ignition screamin eagle 536 cams nrhs 1250 big bore kit along with US gearing then get it all set up on a dyno, ideally by soneone who knows buells |
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| Author: | retromlc [ 08 Jul 2009 19:31 ] |
| Post subject: | Re: S1 tuning |
coz wrote: ive done - in this order mikuni 42mm carb race filter race headers and silencer crane single fire ignition screamin eagle 536 cams nrhs 1250 big bore kit along with US gearing then get it all set up on a dyno, ideally by soneone who knows buells what was the overall improvement like? and what item made the biggest improvement,i know there were other items in the equation but which one do you think was the best investment? |
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| Author: | 03 [ 08 Jul 2009 19:44 ] |
| Post subject: | Re: S1 tuning |
Without a shadow of doubt. IMHO, the biggest single improvement by a long way is gained by fitting US gearing compared to Euro gearing. I would say probably the next biggest improvement would be the suspension, but I don't really need that anyway at the speeds I travel at. (I have a Works rear shock fitted). The big unsung advantage of those strategies is that the bike's reliability isn't compromised. |
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| Author: | Derek Putley [ 08 Jul 2009 19:49 ] |
| Post subject: | Re: S1 tuning |
The old XL1200S "sportster sport" deliberately used twin plugged heads, single fire ignition and different cams to give a sportier sportster with oodles of bottom end even on stock pipes. These models were comtemporary with the S1. oh yeah... and brakes and suspension were fitted as standard too 
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| Author: | shudnobeta [ 08 Jul 2009 21:52 ] |
| Post subject: | Re: S1 tuning |
Spook wrote: I have a 42mm Mikuni and Crane H14 on my X1. You are welcome to give it a blast at East Kirkby if your going Shudders. This is a polite genuine offer as I'm just about to comment on your video Thanks Spook, but East Kirby's too much of a hike for me - on a s1. No one has actually said the crane single fire module dooby makes a noticable difference. My interweb search can't find any dyno read outs either. The cheddar gorge video ? - too many civilians about to go mad - sounds good though don't she I will try again one early morn and try and get that bullitt sound 
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| Author: | pash [ 08 Jul 2009 22:32 ] |
| Post subject: | Re: S1 tuning |
The NRHS site has lots of plots to compare different mods. If you want more bottom end, you need to identify what the problem is. Is it mixture (needle) or ignition (change the timing) or volumtric efficiency (change the cams, exhaust, inlet length [you have a very short inlet tract - try making it longer])? |
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| Author: | 03 [ 09 Jul 2009 07:45 ] |
| Post subject: | Re: S1 tuning |
Presumably, Crane branded sparks are indistiguishable (spelling?) from anybody else's brand of sparks? |
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| Author: | pash [ 09 Jul 2009 08:10 ] |
| Post subject: | Re: S1 tuning |
Depends what time they arrive 
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| Author: | 03 [ 09 Jul 2009 08:25 ] |
| Post subject: | Re: S1 tuning |
pash wrote: Depends what time they arrive Ah, but time is relative, not absolute.
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| Author: | coz [ 09 Jul 2009 08:49 ] |
| Post subject: | Re: S1 tuning |
not only does the crane single fire make a notiable difference, it allows finer tuning of the ignition system you neeed to get the most power out of the bike mines now putting out 101 bhp - dynoed it 500 miles afgter big bore went on its now loosened up more, so will be going back on shortly its no good throwing money at it and then not getting it set up - I got an extra 12bhp !! during adjustments on the dyno (torquetune 07976 961442 notts) |
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