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4.9 All Aluminum Buick V8 without air cleaner - Members Galleries - The Lotus Forums Jump to content


4.9 All Aluminum Buick V8 without air cleaner



With the increase in power, a custom 4 gallon radiator w/ twin, 14 inch electric fans was added

From the album:

'74 Elite 502 restoration

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Not seen is an updated heavy duty 10" clutch to match the heavy duty 5 speed transmission. 

Offenhauser valve train covers dress up the engine with along with spark wire holders keeping them away from the exhaust headers which were ceramic metallic coated, inside and out, to dress up these parts, keeping the exhaust temps up inside the headers for an increase in power (around 10 hp increase to help scavenge the exhaust) all while keeping the engine bay some 70 F degrees cooler. 

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Also updated was the brake master cylinder. Lotus's original part was something over $500 US dollars to replace so I found an AC Delco one for $47 with basically the same cylinder with right hand ports and the same piston diameter, but then I had to replace all of the brake lines which was necessary as the union to the rear brakes was blocked from a stuck valve down line. Even 160 psi wasn't enough to get any brake fluid through to bleed the rear brakes. I didn't find any mention of this part in the workshop manual which was very annoying. Really didn't matter because the rear end had leaked rear end fluid saturating the rear brake shoes at only 28,000 miles making them essentially worthless. Seals failed! The forklift rear end is really problematic and was not designed for a car traveling at much higher speeds and distances IMHO.     

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