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Home > Help Needed / General Tech Chat > n/a 998 help

eden7842

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1755 Posts
Member #: 8852
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leicestershire

17th May, 2011 at 04:31:16pm

hey

bare with me on this one

got a lad with a stock 998 who came to me asking to get it to run right. atm it revs up fine but doesent drive above 1500 rpm. when it came to me it was running a shocking 60 degrees advance without the vac and i cannot get it to run at any less. The engine has been rebuilt by someone and this problem has started since, so its leading me to think that the cam has been put back in wrong. but as ive never seen this i dont know of the result.

am i on the right track ?

thanks in advance, eden

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Kean

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2406 Posts
Member #: 341
aka T2clubby

South Staffs

17th May, 2011 at 04:51:33pm

Surely the cam will have no little effect on the ignition point?

Are the leads on the distributor in the correct place/order?

Get it to TDC and check both valves are closed on number one (take rocker cover off) and that the rotor arm is pointing to number one also.

Hope this helps

eden7842

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1755 Posts
Member #: 8852
Post Whore

leicestershire

17th May, 2011 at 06:06:53pm

well thats what i wanted to know as i wasent sure if it would affect it. i did do some basic checks but didont have much time

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

wil_h

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9258 Posts
Member #: 123
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Betwix Harrogate and York

17th May, 2011 at 06:26:09pm

60 degrees advance, I'm suprised it runs at all.

Cam timing is a good place to start if everything else checks out. If it's miles out then it will cause all kinds of runing issues.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.

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