AK
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Registered: 5th Jul 00
Location: Aberdeen City
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healthy but about 20bhp short of what is expected, torque is about 20lbft more than expected.
here are the plots overlayed
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SetH
Member
Registered: 15th Jul 01
User status: Offline
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they are not 284 cams
[Edited on 16-09-2006 by SetH]
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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The SBD 284 & SBD278 cams have been designed give about 15 -20 BHP* over standard cams, without compromising the drivability of the standard engine, they produce a power band of 2500 - 7500 RPM
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
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this is the SBD graph for sim spec
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
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the peak torque is in the right rev area, just seems to tail off very quickly at high RPM's
Raises a few questions....
Is the std trigger wheel up to it
Are the injectors coping (sure they wont be maxed out, as that would have been obv). I know the spray pattern from LET injectors isnt ideal for high reving NA setups
Is it just down to being a tight as a nuns arse?
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stuartmitchell
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Registered: 24th Apr 04
Location: Kirkliston, Edinburgh
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could just need "broken in" for want of a better word? Plus given the state of tune I would of though that the "breaking in" process would be lengthier.
Just dont break it whilst your breaking it in 
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
User status: Offline
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quote:
Originally posted by AK
still puzzled by the figures, and graphs though.
Hole in torque at 2500rpm or so, then climbs to 190, falls slowly to about 170 6k, then just plumits....
This setup should on full song at 7500rpm..... not peaking at 6000-6500rpm 
I'll post the 1st 2.1 build plots
the knackered 2.1 build plots (low comp on 1 cly)
and the new 2050cc build plots.
personally id say its down to the mapping maybe?
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3CorsaMeal
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Registered: 11th Apr 02
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how mucho does it weigh? do you know?
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A1EX
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Registered: 29th Mar 00
Location: Turku, Finland
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had a smililar problem when i had tb'd 1.6 made lower than expected figures after it was first built up, took it back a thousand miles later and was making proper figures
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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a thousand miles will take me about 6 years 
All the maps are vaguely similar (3 plots above)
The 2nd map felt like an absalute donkey on track.... HUGE hole in power coming out of corners in 3rd at about 3k rpm (i was taking it easy, hence not in 2nd at 5krpm or something
I've emailed WP asking for thoughts, and emailed Steve Broughton as he always seems to give some advice, regardless of how daft my Q's are.
Need to get it road legal to get some miles on it
It'll weigh about 850kg i think
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A1EX
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Registered: 29th Mar 00
Location: Turku, Finland
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Im pretty sure it was Steven Broughton who mapped mine in. Could be wrong
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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SBD?
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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have you driven it? whats the power delivery like? peak power is low.... thought it would be another 1000rpm up on that!
id say it will need more mapping yet, if its a new engine they wouldnt have put much ignition thru it? you running a coil pack?
injectors, doubt they will be maxing out if they are let injectors.
trigger wheels, what you using as a trigger? crank or hall effect (dizzy)
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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dizzyless, coil pack
havent driven it, as its a bit far away (i'm in Kuala Lumper)
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
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ill let you off for not driving then, you using the crank sensor for trigger then, should be more than up to the job.
id be a bit wary about the peak power, but they could have pulled all the ignition out from the top end to save the engine as its new, can you look at the map? well not now but when you get back?
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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i'd just need a cable for my laptop. I have the DTA software somewhere.
Saying that.... my new paptop doesnt have a serial! Ptfff new technology. I'need a serial port/usb convertor thingmy
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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anymore theories?
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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My guess is its down to cam timing or mapping.
when I fitted my cams recently I had a similar problem with peak power being low and wobbly tourque curve. after a bit more mapping and cam timing adjustments it was fine.
dont think a tight engine would cause it unless as broster said, the mapper decided to alter ign timing due to it being a newish engine.
I would set cams back to the manufacturers timing settings and give it another run and start from there.
and I never go by SBD's figures. they are bollocks IMO. I have never met anyone yet that has got 164 bhp from their 164 kit. Unless its fitted and mapped at SBD on their magic dyno.
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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or you could fit a 1.6...............
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
User status: Offline
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Just guessing here. But surely having the power tailing off at high RPM could be due to poor flow, either a restriction in cylinder head (port sizes) or manifold/system. If these remain unchanged from previous specs, then obviously its not that.
Or cam timing with high RPM the window that the valves are open gets smaller and smaller so any non-optimal timing of the cams would show up more significantly at high rpm.
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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the exhaust manifold is the SBD specC... huge primaries
the head is a ported coscat
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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compression ok?
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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dunno...
I'm in KL.... thousands of miles away.
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Lucky B
Member
Registered: 7th Apr 02
Location: Lunatic asylum. Drives: Hard & Fast.
User status: Offline
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Roy reckoned our old car made a kick in the ass off 200lb ft so your motor aint far off that.
Time to sell it now b4 you break it again. 
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AK
Member
Registered: 5th Jul 00
Location: Aberdeen City
User status: Offline
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the cams certainly come on song at 2500rpm
its for sale for 5500...
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