-matt
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| posted on 29/11/12 at 07:39 PM |
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Am I running too rich?
I'm using a 2008 R1 in my Indy. I'm using the standard map at the moment, as I'm yet to get it all set up properly.
I've got an air box with a 100mm Intake, and no cat in exhaust. So should all flow nicely.
I've noticed I get a lot of pops and bangs from the exhaust when lifting off, even slightly. Also there is a bit of hesitancy when putting my
foot down.
Is this a sign of running too rich? Will my setup cause this? Just I would have thought plenty of air, and free flowing exhaust would cause it to
run lean rather than rich?
Any help on this, just want to get it setup roughly, before I get it setup properly next year. It's only road use.
Also any recommendations where to get it set up in the south west?
Cheers
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phelpsa
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| posted on 29/11/12 at 07:42 PM |
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It's generally a sign of running lean on the over run. Not a massive issue really.
[Edited on 29-11-12 by phelpsa]
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-matt
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| posted on 29/11/12 at 08:10 PM |
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That would make more sense then if it's running lean. Could this also cause the hesitancy?
Also can temperature make this worse, I've noticed the last few days (this morning was -1) it has been a lot more hesitant. As in I open the
throttle, then a few seconds later it suddenly goes...
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Mr Whippy
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| posted on 29/11/12 at 08:48 PM |
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on an old carb engine that hesitation would be a sign the accelerator jets were not working so not enough fuel as the butterfly valves have opened and
the mixture leans out. Too much fuel has no hesitation but sluggish performance
pull a spark plug out and I bet it will be all shiny clean rather than light powder brown. Fix it soon or you may hole a piston
[Edited on 29/11/12 by Mr Whippy]
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adithorp
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| posted on 29/11/12 at 09:01 PM |
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quote:
Originally posted by -matt
That would make more sense then if it's running lean. Could this also cause the hesitancy?
Also can temperature make this worse, I've noticed the last few days (this morning was -1) it has been a lot more hesitant. As in I open the
throttle, then a few seconds later it suddenly goes...
My 06 R1 ran very lean in some places on the standard map. In particular it had quite a hesitation on pick-up and a BIG flat spot around 4000rpm. On
overrun and light throttle AFR was high (18-20). Got it mapped and it made a huge difference to the drivability. Hesitation and flat spot gone and a
few extra horses top end as well.
In short, get it mapped.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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matt_gsxr
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| posted on 29/11/12 at 10:03 PM |
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Agree with all the above. Classic symptoms of under fueling.
Maybe also worth checking the temperature sensors are working (air intlet temp and water temp) and fuel pressure is up to the expected level. Each of
these could push down the fueling into the weak range. Weak can be BAD at high power outputs so worth getting it sorted (as Adi said).
Matt
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Andy B
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| posted on 29/11/12 at 10:25 PM |
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The 4c8 R1 suffers big time from localised hotspotting of the cylinder head, in over 20 separate cases I am aware of this has lead to melting of the
bore and head between 2 and 3 cylinders. You really need to get the fuelling set up before you do much more.
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-matt
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| posted on 2/12/12 at 02:10 PM |
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Thanks, I will get the fuelling set up ASAP.
I have though increased for now all fuel by 15 on the power commander, and it drives far better, also sounds better.
As for where to get it set up, I'm located in the south west. I understand day tuning has a great reputation, but is it really worth a 4 hour
drive each way? Or is there anyone else who knows what there doing with BEC's?
Cheers
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Andy B
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| posted on 2/12/12 at 06:58 PM |
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Hi Matt
without doubt Damian at Daytuner is one of the best in the business and I make the 4 hour drive with every one of our race cars so I would say if you
can get the time - its worth it. However if time wont allow speak to Larry or Nick at PDQ - they are also very good - if you say I sent you you will
get a discount as well
regards
Andy
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-matt
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| posted on 4/12/12 at 06:58 PM |
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Thanks Andy, I think I will give PDQ a go, as they are not too far away.
Also I had a thought earlier. My intake air temperature and pressure sensors are still just tied up in the wiring loom in the engine bay.
Should I have these attached to my air intake pipe? I assume these being tied up in a hot engine bay could have a massive difference on the fuelling?
Cheers
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Andy B
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| posted on 4/12/12 at 07:09 PM |
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Hi Matt
yes the air intake temp sensor wants to go into the airbox common to all throttles, atmos pres sensor can go pretty much anywhere
regards
Andy
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