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DIR Return to: ROLLING ROAD & ENGINE DYNO RESULTS
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#Post#: 1438--------------------------------------------------
Twin dellorto abf
By: Robin_16v Date: December 15, 2013, 1:17 pm
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Hello,
I had my car tested a view weeks back, and this were the
results!
Air fuel ratio was all over the place if i look at the graph..
And my max torgue was a bit to high i gues, for a couple of
283/279 cams.
Feedback to get the torque to a lower rpm would be great!
Engine spec:
Std block/head
Catcams 283/279
custom 4-1 exhaust
60mm tailpipe
twin 45 dhla dellortos.
[URL=
HTML http://s957.photobucket.com/user/RobinBreve/media/Rapportcrossauto-page-0_zps2da5c881.jpg.html][IMG]http://i957.photobucket.com/albums/ae52/RobinBreve/Rapportcrossauto-page-0_zps2da5c881.jpg[/img][/URL]
[URL=
HTML http://s957.photobucket.com/user/RobinBreve/media/DSC01450_zps7460b0ff.jpg.html][IMG]http://i957.photobucket.com/albums/ae52/RobinBreve/DSC01450_zps7460b0ff.jpg[/img][/URL]
#Post#: 1448--------------------------------------------------
Re: Twin dellorto abf
By: chrismc Date: December 17, 2013, 2:59 pm
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You could advance the cam timing to make it less peaky
If the engine is only using a stock head/block/c.r then the cams
are probably a tad wild for the rest of the spec
#Post#: 1450--------------------------------------------------
Re: Twin dellorto abf
By: Robin_16v Date: December 18, 2013, 5:48 am
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Ok, i will try that, thanks for the advice. I had the cams in
another engine before. But early this year it was blown up :'( I
need to start all over again. I will get the head ported this
winter, maybe will get some other pistons with it.
#Post#: 1456--------------------------------------------------
Re: Twin dellorto abf
By: GollumFreeZone Date: December 18, 2013, 1:53 pm
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I think it needs a bit more squeeze - either fancy pistons or
deck the block and skim the head to get about 11.5:1, or as
close as you can.
#Post#: 1461--------------------------------------------------
Re: Twin dellorto abf
By: Smudge Date: December 18, 2013, 4:24 pm
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It looks like you rev milit is only 6700rpm and the BHP is still
rising at this point, did you rev it past this, any graphs?
I would rev it past 7000rpm, the cams should keep making power
at least up to 7500rpm.
#Post#: 2249--------------------------------------------------
Re: Twin dellorto abf
By: Sebeya Date: April 25, 2018, 12:19 am
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[quote author=Smudge link=topic=184.msg1461#msg1461
date=1387405497]
It looks like you rev milit is only 6700rpm and the BHP is still
rising at this point, did you rev it past this, any graphs?
I would rev it past 7000rpm, the cams should keep making power
at least up to 7500rpm.
[/quote]I have the same opinion as you.
#Post#: 2314--------------------------------------------------
Re: Twin dellorto abf
By: Radfrod Date: June 4, 2019, 2:33 am
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I am thankful for the detailed explanation.
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