55ant
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| posted on 4/3/10 at 03:44 PM |
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hmm, im thinking i need to get mine rrd'd now! anyone recomend anywhere around sg13? just changed the pinto over to bike carbs
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ashg
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| posted on 4/3/10 at 04:18 PM |
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thought it would be a dry solder joint. they are very hard to spot especially when you are against the clock.
glad to hear you are happy with the new engine.
when it comes to bike carbs, having a proper setup on a good rr is like night and day. my engine was 100 times better after it was set-up properly on
the rr.
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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will121
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| posted on 4/3/10 at 04:27 PM |
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have a great time tomorrow, just watch out for cold track/tyres first thing in the morning before the sun comes out
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big_wasa
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| posted on 4/3/10 at 04:42 PM |
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All is well then 
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SPYDER
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| posted on 4/3/10 at 06:39 PM |
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My friend has a factory built westfield with a 1.8 Zetec on Jenveys. MBE ECU.
Westfield claim 155 bhp for this car. The engine was new at build and has now done 15k or so.
On the rolling road at Newark last year it made 138 bhp.
This figure, according to at least some people "in the know", is nearer the truth than 155.
So your 110 at the wheels could be a reasonably honest, not over-inflated result.
Have a great day at Cadwell!
Geoff.
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lotusmadandy
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| posted on 4/3/10 at 08:15 PM |
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Dan,that's exactly the way i felt when i drove mine with the newly fitted 2.0 zetec on tuesday.
It is a marked improvement over the 2.0 pinto.As said above dont worry about the figures and just enjoy it.
Can't wait to get mine on the RR and see what it makes now.
Andy
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procomp
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| posted on 4/3/10 at 10:45 PM |
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Lol Dave I am playing Nicely. I just thought that the figures sounded a tad low compared to what has been seen from many many different engines over
many many different rolling roads.
It is however fair to say that in the majority of those cases the engine will be relatively fresh and will all be running on either twin 40 or 45
Webber's with varying choke sizes. With a set of Genuine 130 spec cams and cam timing with 45's and 36 chokes you would be disappointed
if you had below 165 at the flywheel. But as is usual who's road and which operator. Most will know i only ever use one road and one operator
for consistent back to back figures.
Now i wont start a debate on the megajolt systems etc but where cars have been set as good as they can be on a mega system. Improvements have been
seen by switching to a DTA / Omex / Emerald ecu setup.
so with a set of bike carbs and a Mega system and assuming a relatively used motor the figures are not disappointing. And if it's road use only
Who gives a monkey's . You'd be hard pushed to utilise the full potential very often anyhow. so keeping the engine lower spec and reliable
will be of far more concern.
Lets face it using high lift cams that a championship insist you use and then leaving you with and engine that produces 192 at the flywheel with max
power at 8200. But finding out that the followers give up at 7500 really is a bit pointless. As the majority of the kit car championship have found
out. :-(
Cheers Matt
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whitestu
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| posted on 5/3/10 at 02:00 PM |
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quote:
Now i wont start a debate on the megajolt systems etc but where cars have been set as good as they can be on a mega system. Improvements have been
seen by switching to a DTA / Omex / Emerald ecu setup
Any idea what that difference would be down to? Aren't both systems just controlling the ignition timing?
Stu
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MikeRJ
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| posted on 5/3/10 at 02:27 PM |
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quote:
Originally posted by whitestu
Any idea what that difference would be down to? Aren't both systems just controlling the ignition timing?
Stu
If there is a difference it will most likely be down to the skill and experience of the person that maps them.
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sebastiaan
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| posted on 5/3/10 at 03:13 PM |
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Not entirely. I did some bench testing and the MS unit i used at the time (v2.2 with MSextra code) showed some jitter on the ignition timing. IIRC
something around 1-2 degrees @ 7000RPM. That would cause the MBT ignition point to not be used at all times, which COULD influence power output.
I'm pretty sure though, that other ECU's would more or less show the same jitter given the same crank angle input.
So there might be a *very small* difference in attainable power output, but it would be very small indeed (max 5bhp or smaller at a guess)
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MikeRJ
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| posted on 5/3/10 at 08:00 PM |
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Megasquirt is a different kettle of fish really, the spark functionality was squeezed into a fairly low speed micro which was already very busy, hence
the timing jitter. Using it with EDIS rather than on board coil drivers is better for this reason.
I would not expect the Megajolt Lite Jr + EDIS to exhibit any worse jitter performance than an OEM system to be honest.
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