smart51
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| posted on 6/12/05 at 06:25 PM |
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R1 engine "hesitation" at 5k - 6k RPM
Under hard acceleration in low gear, the revs bounce about a bit around 5 or 6000. Once through that it will run upto the red line.
The roads have been very greasy on the coouple of times I've taken the car to MOT and SVA. The car is on nearly new ordinary road car tyres.
I've also fitted a Barnett clutch plate with coil springs and new EBC standard friction plates (the steel plates look like new).
The car doesn't snake or slide under acceleration in a straight line and it cruises nicely at any engine speed. What is the most likely
problem, lack of grip, clutch slip or bad fueling?
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mnr laptop
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| posted on 6/12/05 at 07:47 PM |
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hi colin
be carefull it will be running that lean you may see a piston have lift off, thats why you have the flatspot, after sva you then fit the dynojet and
get it setup and all will be well
cant stress enough though dont run it too much that lean
best regards
marc
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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progers
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| posted on 6/12/05 at 09:22 PM |
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The R1 has a bit of a flat spot around 5-6k normally and this will be made worse by non-ideal fuelling. In a bec with not standard exhaust (and maybe
a sausage filter) its likely to be running lean . Get the engine dynojetted and set up correctly on a rolling road and it will be fine. Until then
don't cane it too hard you may harm the engine.
Cheers
Paul
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smart51
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| posted on 6/12/05 at 10:14 PM |
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OK. The next trip is to SVA which is across the city. 30 and 40 MPH speed limits = 3000 - 4000 RPM. Gently does it.
Where can I get a dynojet kit then? Where in the midlands is good for setting them up?
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Paul G
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| posted on 7/12/05 at 09:55 AM |
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> Where can I get a dynojet kit then? Where in the midlands is good for setting them up?
Good question - I'll want this doing when I pass my SVA too
Incidentally took my R1 Indy out for a quick (3 mile!) test yesterday.
I felt that flatspot a bit too, but the most worrying thing was the massive clunk everytime I changed gear - is that normal?? It was mint though
wheelspinning all the way just got to get used to that power and get the tracking done, cos it wouldnt go in a straight line. Obviously this was all
on the private roads around my country estate ;o)
[Edited on 7/12/05 by Paul G]
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ChrisGamlin
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| posted on 7/12/05 at 10:45 AM |
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They do clunk quite a bit when changing gear but you'll probably soon develop a technique to minimise it. I find if you change like you do in a
normal car, i.e. clutch fully down then pull the gear then clutch up again, its very clonky, but if you literally just stab the clutch and pull the
gear at the same time, and only partially lift, it makes the change much quicker and much smoother. It seems the more you rush a sequential dog box,
the smoother it gets.
[Edited on 7/12/05 by ChrisGamlin]
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Paul G
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| posted on 7/12/05 at 11:28 AM |
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Ah cheers Chris - I was doing it normal car style, I'd better get some more practice in!
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speed8
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| posted on 7/12/05 at 12:13 PM |
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When you're pressing on just upshift clutchless.
Bit of light pressure on the gearstick, lift off pedal, in pops next gear, foot to floor again. Very smooth on the bike, would imagine it would be the
same on the car.
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progers
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| posted on 7/12/05 at 04:09 PM |
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Yep, thats the technique, light pressure on the stick then lift off sharply on the throttle with or without a dab of clutch (depends on how brave you
feel) Once you get confident cluthcless changes will be easy, all except that tricky 1->2 change...
Paul
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smart51
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| posted on 7/12/05 at 04:15 PM |
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Clutchless gear changes are something for me to practice too.
So where will dynojet / set up the fueling on my R1 engined car?
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progers
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| posted on 7/12/05 at 04:24 PM |
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I'm talking upshifts here, downshifts are alot trickier. I personally just put the clutch in and bang down the box...
- Paul
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progers
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| posted on 7/12/05 at 04:26 PM |
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TTS (northampton) used to be the best place, but I heard they have gone bust? If so, you'll probably have to talk to PDQ in slough.
Cheers
Paul
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Guinness
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| posted on 7/12/05 at 04:35 PM |
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TTS supplied my Dynojet kit about 2 weeks ago. If they have gone to the wall it must have been quite recent?
Fitted my dynojet kit in a couple of hours one evening. (This included getting the carbs off the car, draining the fuel off, draining down the
cooling system to get the carb warming system off, getting the choke and throttle linkages off, fitting the actual kit and re-installing it all).
Yet to try it on the road so can't confirm it has solved it (yet). However once the kit is fitted the only adjustments are made to the mixture
screws, balancing the carbs and by moving the needles. All of this can be done with the carbs in situ.
Cheers
Mike
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smart51
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| posted on 9/12/05 at 03:20 PM |
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TTS haven't replied to my email so I'm just going to have to phone them.
Clutchless upshifts are great. Much smoother and quieter. It still clonks quite a lot when shifting into first.
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Coose
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| posted on 9/12/05 at 04:33 PM |
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They all do that sir..... 
Spin 'er off Well...
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G.Man
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| posted on 10/12/05 at 06:58 AM |
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TTS were alive when I left the uk 9 days ago
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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smart51
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| posted on 10/12/05 at 05:30 PM |
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I went to put my carb needles back in thier original place after moving the circlip up to the top position for SVA. I noticed that there are 5
grooves on the needles, not the 3 that I originally thought. The needles were in the middle groove when I first looked and the "richer"
two were hidden by the plastic ring.
If engines run lean in kit cars fitted with foam filters and aftermarket exhausts, what ring should I fit the circlip to?
By movig the needles out, will I cure the flat spot at 6000 RPM problem or will I still need to have it dynojetted? I wouldn't mind leaving
that until the summer, unless I'm going to damage my engine.
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OX
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| posted on 10/12/05 at 06:52 PM |
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to richen it up move the clip closer to the pointy tip.you havnt got to rush out and buy a dynojet kit straight away just raise the needles one space
at a time and you'll be ok .
before i fitted my dj on the r1 i just lowered the clip then played with the mixture screws. as a base setting youd be fine with the mixture screws
set at 4 turns out . it will probably sound quit lumpy at tick over but you can fine tune this by tweeking the mixture screws untill it smoothes
out,,its not easy and doesnt make much difference once your throttles are off the stop but it makes for a sweeter sounding engine and crisper when
reving from nothing
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