Lotus Elan

Is it possible to have a relaxed drive in a Elan?

PostPost by: h20hamelan » Sun Aug 15, 2021 8:28 pm

My plan is for the heavier and more sleek +2 to have a 5 speed on Patton Fi as the GT
The wee one, a 3:1 with the hot cams and DCOE for the daily spring
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PostPost by: David1953 » Sun Aug 15, 2021 8:42 pm

Just back from 3,000 mile round trip to Portugal from Wiltshire.
I had no problem with cruising at 4,000 to 4,500 revs, around 80mph with 3.55.
As far as comfort goes the wind noise is the most annoying aspect, but I did not find that as bad as the drumming exhaust note of other old cars.
I did spend far too much time on motorways, but that enabled 700mile days. And more time to enjoy the car at the destinations. If I could avoid the M25/M20 the whole trip would be improved.

So my reply to the original question would be, depends on how you define relaxed. I look forward to the next long trip.
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PostPost by: LI-599 » Mon Aug 30, 2021 7:28 am

My S4 dhc is running standard gearbox with 3.55 diff and is very easy to cruise at our (ever decreasing) speed limits in Australia. 60mph is about 3000rpm and 70mph achieved just over 3500. Note: Speedo and tacho move about a bit at these figures.
I am now using 165-78-13 Yokohama tires at 24(f)and 30psi(r) which transformed the nervous handling to total relaxed driving on twisty or straight roads. As noted by others it is much better with the roof off otherwise wind noise is annoying. I have a small wind blocker behind the seats and bespoke tourneau cover to prevent that breeze attacking us from behind.
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PostPost by: tdskip » Sat Jul 23, 2022 5:38 pm

Bill - did you ever get the 3.1 installed? How is it working in NorCal conditions?

I should probably confirm what I actually have now by counting wheel revolutions but I’d be shocked if it is a 3.55 already although as a 1969 S4 isn’t that what it would have come with?
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PostPost by: 1owner69Elan » Sat Jul 23, 2022 6:07 pm

tdskip wrote:Bill - did you ever get the 3.1 installed? How is it working in NorCal conditions?

I should probably confirm what I actually have now by counting wheel revolutions but I’d be shocked if it is a 3.55 already although as a 1969 S4 isn’t that what it would have come with?


You need to count out the diff ratio to be sure. My Federal 69 S4 SE has a 3.77. As original, and delivered to me in 1969.

Now have a 5-speed so relaxed cruising excellent.
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PostPost by: billmoore42 » Sun Jul 24, 2022 2:23 pm

Update on my 3.1 CWP conversion - I have finally scheduled this and should have it done in about 4 weeks, along with a driveshaft change from donuts to CV driveshafts. I currently have the 3.77 diff, and I believe a 2.97 first gear ratio. I have a 1700 cc stroker motor, along with Webers, and I am hoping this proves to be adequate with the new ratios.

I am a little nervous, I hope the car is not ruined for back road type work, but I cannot stand the current high revs on the freeway!

I will report back as soon as this is completed.
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PostPost by: TBG » Sun Jul 24, 2022 4:13 pm

Bill - you don't have to worry - it all works tremendously well. Just done a continental tour and creaming along the auto route at 90+ mph a bearing in the gearbox went. We think?? (coming home on a truck) But before that the relaxed cruising and wonderful torque made the trip really relaxed. Down about 1000rpm in top? What is not to like? D
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PostPost by: tdskip » Sun Jul 24, 2022 4:35 pm

Good luck and keep us posted Bill!
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PostPost by: 2cams70 » Sun Jul 24, 2022 10:32 pm

The other alternative is not to stroke the engine in the first place
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PostPost by: h20hamelan » Mon Jul 25, 2022 3:44 am

2cams70 wrote:The other alternative is not to stroke the engine in the first place



Does the engine spin faster, the shorter the stroke?
I would assume one would get more top end torque, with the longer stroke.
Does the twink drop off, if set correctly?
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PostPost by: 2cams70 » Mon Jul 25, 2022 3:51 am

The longer the stroke the higher the piston speed and consequently the higher the piston acceleration and deceleration forces when the piston changes direction at the end and start of each stroke for any given engine speed. Whilst you may gain some torque you lose out in other areas as well the main one being a loss in engine smoothness.
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