Author Topic: 18 hp apposing twin runns bad  (Read 8901 times)

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Offline Workmanf150

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Re: 18 hp apposing twin runns bad
« Reply #15 on: March 31, 2009, 09:38:01 pm »
oh well that one is worse the motor i am tearing down has been sitting in a friends yard for six years and never runn so im sure that carb is in bad shape the motor looked bad outside but almost like new inside but still want to go with stronger pistons and rods and a new cam. would love to try a cam in the running motor just to see how it reacts. how much are the g-team cams they dont have prices on the web site?

Offline Rooster

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Re: 18 hp apposing twin runns bad
« Reply #16 on: March 31, 2009, 09:43:18 pm »
Not to be a kill joy, but there aren't any "stronger" pistons or rods for these engines. Lots of talk about building them, but nobody supplying them yet.
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Offline Workmanf150

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Re: 18 hp apposing twin runns bad
« Reply #17 on: March 31, 2009, 09:46:06 pm »
i think im gonna try to tear it down tonite and look at it ive never even had this one a part maybe change main jet or drill it out bigger.  have actually done that before long time ago on old motorcycle carbs would get jewlers drill bits and drill the jets out one size bigger or what it needed used a small hand drill
really will the stock rods and pistons hold up ok or are the destin to come apart, and what about cams G-team does make cams?

Offline Workmanf150

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Re: 18 hp apposing twin runns bad
« Reply #18 on: April 01, 2009, 09:17:40 pm »
got an update for today i did tear the carb down and it was bad the gasket has literally disolved and the was every wear so im cleaning now and getting alot of junk out of passages gonna drill jet just got to find the right size drill bit

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Re: 18 hp apposing twin runns bad
« Reply #19 on: April 06, 2009, 01:34:36 pm »
Your exhaust looks pretty small.
Those ports can use some work if your tearing into it, and I like 1 1/4" pipes.
2 into 1 would help.

By the way, I have seen these things run with singles on them, and your doing an opposed?!!

And they call us nuts!
Bert stole my cookies!!
 I think he used them to bribe Ed into something naughty?

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Offline Workmanf150

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Re: 18 hp apposing twin runns bad
« Reply #20 on: April 06, 2009, 05:23:47 pm »
1 1/4 exhaust? im running 3/4 maybe thats part of my problem looks like im gonna by building a new exhaust system.  And yea but you can never have too much horse power.  still want to build bigger motor maybe little nitrous too. 

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Re: 18 hp apposing twin runns bad
« Reply #21 on: April 06, 2009, 05:32:38 pm »
Yup, 3/4 is too restirictive, Flatheads gotta flow.
Bert stole my cookies!!
 I think he used them to bribe Ed into something naughty?

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Offline Workmanf150

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Re: 18 hp apposing twin runns bad
« Reply #22 on: April 06, 2009, 05:53:13 pm »
well looks like im building new exhaust this weekend

 

anything