Grey Motor Drag Car Build

Includes fuel system, cooling system and exhaust.

Moderators: reidy, Blacky

Blacky
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State: WA
Location: up in the Perth hills

Re: Grey Motor Drag Car Build

Post by Blacky »

Do you have a borescope ? Would be a handy gadget I would imagine for situations such as this ??
When you're faced with an unpleasant task that you really don't want to do, sometimes you just have to dig deep down inside and somehow find the patience to wait for someone else to do it for you.


Foundation member #61 of FB/EK Holden club of W.A.
BS
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Joined: Thu Jul 31, 2008 8:31 pm
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Location: Brisbane

Re: Grey Motor Drag Car Build

Post by BS »

Blacky wrote:Do you have a borescope ? Would be a handy gadget I would imagine for situations such as this ??
No I don’t but can get hold of one fairly easily to have a look inside


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BS
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Re: Grey Motor Drag Car Build

Post by BS »

Well did the self tapper in the rocker union trick. Have oil coming out of the rockers in around 15 secs now and it’s bumped my oil pressure up at idle another 2-4psi. Oil pressure has never been a concern though but I guess it has given me piece of mind that all that side of things is ok.

Ran a compression test. No issues there and also ran a leakdown test without any concerns with the result.

Will run my usual post meeting maintenance and just send it…

I’m thinking it’s still a fuel issue. I’ve managed to tune the flat spot out of it and it seemed to be leaving way better but still feels like it has a lot left in the tune. Will keep chipping away.

I’ve also started plying with the su plumbing on the dummy engine. If spares box every sort my order out I’ll start getting a bit more serious with the sus.

Once I get a bit of a break between events (after a long hiatus thanks to the weather/covid) I’m going to swap out the camshaft to something more suitable and proceed with getting the sus on.


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Harv
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Re: Grey Motor Drag Car Build

Post by Harv »

Good news on the compression and leakdown. :D

You'd think if it was fuel though that the AFR would have been going nuts.

Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a grey motored FED.
BS
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Location: Brisbane

Re: Grey Motor Drag Car Build

Post by BS »

Yeah for sure. According to the AFR everything is still reading super fat and doesn’t seem to make any real difference when I change the jetting. I pull the plugs every run and I’d expect to see them rather sooty with an AFR of 10:1 but apart from the last run they looked good after each run even after driving it back up the return road.

Like I said seat of the pants it felt like the flat spot is gone but overall still not happy with it.


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Harv
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Re: Grey Motor Drag Car Build

Post by Harv »

10:1 is damn rich, and agree it should be sooty. Mebbe lean out the power bypass valves a little more and carefully watch the plugs. Back out of it mid-run if it pings like crazy. The leanest I've got are #71's and you're already leaner.

Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a grey motored FED.
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