Lotus Elan

CAMSHAFTS

PostPost by: rgh0 » Sat May 19, 2012 6:09 am

SJ Lambert wrote:How much torque do the best camshafts produce days?

I'm planning on using a TILTON clutch with a 200 ft/lb capacity, I reckon that in an open wheeler, that it will be fine. I don't want to use a heavier clutch because besides being "heavier" I'd have to move the slave cylinder from a remote mounted one to a bobbin replacing one.



I think 200 ft/lb sounds plenty. You will be struggling to get 140 ft/lbs out of a 1600 twin cam
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PostPost by: twincamman » Sun May 20, 2012 2:16 am

you will be like Corvette owners with an over developed left foot muscle causing you to walk in small circles all day----oh yes NEVER put youself in a situation where you say ' I WONDER WHAT WILL HAPPEN IF I TRY THIS '---ed
dont close your eyes --you will miss the crash
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PostPost by: SJ Lambert » Mon Jul 30, 2012 9:16 am

rgh0 wrote:
SJ Lambert wrote:How much torque do the best camshafts produce days?

I'm planning on using a TILTON clutch with a 200 ft/lb capacity, I reckon that in an open wheeler, that it will be fine. I don't want to use a heavier clutch because besides being "heavier" I'd have to move the slave cylinder from a remote mounted one to a bobbin replacing one.



I think 200 ft/lb sounds plenty. You will be struggling to get 140 ft/lbs out of a 1600 twin cam



AP offer a few green rated (144-161 ft lb ) clutch assemblies, the most expensive (and I presume the lightest) is an A ring type with an alloy cover (that's 300 grams lighter than the same thing with a steel cover), the other type is a lug type (like the Tilton one that I've already got). The light weight AP one may get a run on the 90 tooth flywheel.

James
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PostPost by: SJ Lambert » Wed Feb 04, 2015 8:02 am

rgh0 wrote:...................

I recently did some back to back tests on 2 otherwise identical race engines one running 45DCOE's with 38 mm chokes and one running 36mm chokes and had no difference in maximum power output. I would only consider going to 38mm if you have a very light car (seven or open wheeler) as the risk of low speed response loss possibly balances any potential for top end gain.

..............


Rohan



I better get a set of 36s for mine - as John also recommends 36 and up for mine too.
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PostPost by: SJ Lambert » Sun Feb 08, 2015 9:45 am

I didn't realise that chokes in the odd sizes were offered these days, 37s and 39s are obtainable for 45 DCOEs in Melbourne at the moment.
Last edited by SJ Lambert on Sun Feb 08, 2015 10:30 am, edited 1 time in total.
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PostPost by: rgh0 » Sun Feb 08, 2015 9:51 am

Interesting - I could not get 33 or 35's in recent years .

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PostPost by: SJ Lambert » Sun Feb 08, 2015 11:58 am

Weber Performance are doing them - they may well be enlarging 36s.

I've had a set of 33s for DCOE 40s gathering dust for ages, but hadn't seen the odd sizes for the 45s.
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