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Elva Technical Info 
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Joined: Thu Mar 04, 2010 3:14 pm
Posts: 159
Location: Julian, CA (USA)
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Post Elva Technical Info
I am thinking we might start this thread to share tech info on Elva sports racers and maybe Couriers too. We are "rebuilding" our Elvas all the time (and hopefully to period correct specs) so here might be a place to list what brand and part numbers we have found that work for us. I will start with some Coventry Climax parts numbers as this engine is found on MK I through MK VI Elvas. (The prices on the lists are from the 1970's so expect a ten-fold increase when you get them now).
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Last edited by elvamk2 on Wed Jun 30, 2010 10:55 pm, edited 1 time in total.



Tue Jun 29, 2010 2:56 am
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Joined: Tue Mar 09, 2010 6:57 pm
Posts: 65
Location: Bennington, VT USA
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Post Re: Elva Technical Info
Good thought. I'm sure there are individuals who have "parts list" from previous or on going Elva projects. Roger should be able to contribute. As I get deeper into my Courier, I'd be glad to post what parts I identify.

Al


Wed Jun 30, 2010 11:44 am
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Joined: Thu Mar 04, 2010 3:14 pm
Posts: 159
Location: Julian, CA (USA)
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Post Re: Elva Technical Info
Coventry Climax Torque Settings and SASCO Stages 1 - 7.

The Torque Settings come from longtime Lotus Elite restorer and guru Mike Ostrov of California. These settings are for stock CC parts. Carillo Rods, for example, would have their own settings. I am told that the Cometic head gaskets now available do not need re-torquing. CC engines came originally as 1098cc motors in either Stage I, II or III. In the 1960's and later more hp was gained in these engines by various methods as outlined by SASCO below.

Climax FWE torques and misc setting. From Mike Ostrov. Lotus “Elite” restorer.

TORQUE SPECIFICATIONS THAT Mike Ostrov USES (all figures in ft-lbs.)
Main Caps 38-40 (grade 8)
9mm Rod Bolts 24-26 (new). Upgrade bolts available.
Flywheel (Steel) 35-38 (grade 8)
Head (cold) 20-22 (grade 8). Upgraded studs available.
Cam Sprocket 32-34
Cam Caps 14-16... Be careful!
Cam Cover 10-12
Cam Carrier 13-15 (Note: CC motors had both 3- and 5-bearing carriers.)
Jack Shaft 32-34
Pressure Plate 23-25
Front Pulley 38-40
1/4" Nuts 12 max
5/16" Nuts 18 max
Spark Plugs 18-20

FINAL SETTINGS & DYNOMETER COMPARISONS OF CLIMAX ENGINES

FWE: 1216cc Road Use: Plugs - Champion N-3, Cam Timing - 00 split overlap, Fuel - 92 Octane RON Unleaded, Valve Clearance (in/ex) - 0.010"/0.012" cold settings, Ignition Timing - 30BTDC and 380-400 total advance at crankshaft. Exhaust System - Derrington Header with straight pipe 1 3/4" OD x 40" long, Camshaft - Crane with a 0.360" lift. Fuel Pressure - 2 1/2 to 3 lbs. Dual SU carbs, no air cleaners, 0.090 main jets, GT or QP - 4 needles, no air intake horns. Compression readings; 170 to 174 lbs. all cylinders, hot, with open throttles.


FWE 1216cc Competition Use: Plugs - Champion N-3G or NGK BP5ES Fuel - 104-110 Octane RON leaded. Valve Clearance (in/ex) - 0.007"/0.009" cold settings,
Ignition Timing - 60BTDC and 400 max total advance at crankshaft.
Exhaust System - Derrington Header with straight pipe 1 1/2" OD/26 1/2" long exit before rear wheel, Camshaft - 0.360" lift with 5 bearings.
Fuel Pressure - 2 1/2 to 3 lbs. Weber carbs 40DCOE31 series; mains-125, emulsion-F16, air-180, venturies-32mm, air intake horns-1 5/8", air cleaners - none.
Compression readings; 240-245 lbs. all cylinders, hot, with open throttles. Compression Ratio: 11.01 to 1.00.

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Wed Jun 30, 2010 10:48 pm
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