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Johnny's HKS Twin Build thread


hodge

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The sumps been off, which was a cross member off job, the strainer was clean, the pick up pipe secure and the gasket sound, but renewed as a matter of course. The oil has a rather worrying amount of silver in it which will be bearing material from wear from running no or low oil pressure. I have borrowed a starter of another car for now, and have a replacement coming next week. I am going to pull the oil pressure relief valve out of the pump tomorrow, if that is OK it's an engine out and strip job.

Edited by Chris Wilson (see edit history)
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Got the car back, feels great. Oil pressure is ~0.5bar higher overall now than it was prior to the dyno. Didn't give it any "punishment", but a few half throttle trips to 4500rpm, and it's certainly a machine!

 

Will enjoy it tomorrow and get the oil changed and see what it brings!

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Awesome "G".

Can you detail what chris found so everyone knows what the issue was please.

 

I'll do my best, but Chris will probably do it much better :)

So, after the dyno, we were out road-checking the car - and we noticed the oil pressure had gone - nothing was fixing it, so I had the car recovered to the venerable Mr Chris Wilson - who on inspection of the oil, found silver contamination (probably bearing), then looked at the release valve, which was jammed. A thorough clean brought the oil pressure back.

 

The current thought is that it's the cams, with the poor castings used, and they're releasing some sand-like contamination - which jammed the release valve.

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I may post up a resume on the two issues (overheating and the oil pressure one), with John's car this weekend. Both were interesting problems that were not the usual routine things. May help others, so with John's permission?

 

Shoot for the stars Chris. They were all VERY strange issues that a mear mortal wouldn't have found or expected.

All your help was very much appreciated by both myself and Johnny.

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  • 2 weeks later...

Well, a small update on this :)

I took it over this morning to Hodge's for a nice run out of about 175 miles. It's first real run since I got it back from Chris! All good! There are some mapping issues that we never had a chance to complete on the dyno day - but I've emailed Ryan about them and we'll sort that.

 

But, on boost. Wow. I was tootling along at about 78-80 leptons on the M62, nice, dry. E46 M3, roof down was right up my chuff - so when the traffic clears, I indicate to mvoe over, downshift and wait for him. He guns it. I do like wise....... and where did he go!? Waaaaaay back.

 

And, about 50-60 miles further on, between Leeds and the M1 north - there was ANOTHER M3. Just threw him by the way-side!

 

Journey home was just pleasant, too much rain to do too much :D

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