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Reply to "Maui garage find Intermeccanica rebuild"

mppickett posted:

Thanks, everybody. It's a lot of fun and terror, but easier with the information posted on this site. Al, the owner didn't remember the name of guy who did the engine build (said he built "Herbie" but that could be anybody . Here's the engine build specs he shared with me:...

1776 cc engine 
Engle 110 cam and gear...
69 mm crankshaft (counterweighted)
Piston and liner set (905 mm)...
042 racing heads..
40 mm duel carbs set Kadron style...
EMPI exhaust system
Fully balanced and flowed

The heads have round ports so I don't think they are "extreme." I failed to measure the valves when I had it apart so that's an unknown, too. I suspect it will be fast enough to merge on the few highways we have on Maui and slow enough that I won't be running over many island visitors If you have any HP estimates, I'd love to hear them. Mahalo (thanks)!

If the 042 heads are from MOFOCO, Michael, they have 40x35mm valves and cast (10%? 15%? I forget...) larger ports, so...

An engine with these components should rev to somewhere around 57-5800 or even 6,000 rpm with power. Depending on the exhaust and compression ratio the engine will produce any where from 85 to close to (or maybe even?) 100 hp and be a very fun engine in your Speedster. Adding 1.25 rockers, ensuring the compression ratio is optimal (close to 9:1 with no sharp edges in the combustion chamber), making sure the exhaust isn't restrictive could add up to 10 more hp (the venturis in the carbs may need to be enlarged from 28 to 30 mm- I'm not sure of how much power the 28 mm vents the carbs come with are capable of).

mppickett posted:

Al, regarding the manifolds, I opened it up until about an inch above the bottom. I haven't had a chance to run the engine enough to check the plugs. It was more of a "while you have it apart" thing. I figured it couldn't do any harm and there was anecdotyl evidence that it helped the idle mixture.

Yeah, this is what a friend tells me (he knows way more about these things than me).

It will toodle nicely around the island with decent power and be a hell of a lot of fun! Al 

Last edited by ALB
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