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Well....that didn't go to plan
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This could prove.....expensive!!
Holy shit! I wondered where that Piston came from in Thetford!
You've done a good job there mate. Was it going well before hand?
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Yeah mate all was well....I think the shitty Williams rods didn't like the 8350rpm!!!!
I'll dig the clip out tomorrow of it going bang but it literally just broke, didn't over rev (according to the logging data) something in the engine just broke.
Impressive. I couldn't escape work, but guess I'd of missed you running anyway after that.
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Holy fuck. Must have been some bang!
It's so uneventful you wouldn't even believe it happened!! If it wasn't for the clouds of smoke pouring out the back I'd have thought it was just a misfire hahaQuote:
Originally Posted by bazzap8389
Wow, an impressive hole.
Time for an alloy block? :)
Inspection window . had it snapped the pin out of the piston ?
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I've not heard good things about the alloy blocks.....Quote:
Originally Posted by novarally
We think the rod let go but equally it could have snapped out of the piston....I know both the piston and the rod are MIA!!! Nowhere to be found!!!Quote:
Originally Posted by total_vauxhall
Maybe next time you won't build things on a tiny budget.
Ouch! That reminds me of my freshly rebuilt X16XE going bang whilst give it large around Silverstone. In my case it presumably was a spun bearing shell (aluminium instead of proper material) used by the place that built my engine. Expensive failures, these!
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Ultimately we can't pinpoint the failure, it was either a piston broke, rod little end let go or valve dropped which led to the first two in succession.
I can't complain, it's suffered 4 years of abuse and I've never had it out for a freshen up.
New engine will require yearly top and tailing (depending on use)
And the moral of the story is, use proper components, I've got a steel Arrow crank, Steel Arrow rods and we'll be using Omega pistons and Rec valves, all solid properly made stuff.
Double post
Is this done yet
Won't be long mate, just making a few changes to the steering wheelQuote:
Originally Posted by Jonlem
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Will need someone to wire all this lot in too [emoji6]
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Oooo, there’s some nice bits there ��
Some expensive bits there Colin!! HahahaQuote:
Originally Posted by novarally
Got a Life Racing ECU going in it aswell which will serve as engine ECU and gearbox controller.
That are some very nice parts!
Won't be long and we'll be using them in anger I hope...Quote:
Originally Posted by prs
We're also pretty confident that valve springs were to blame for the previous failure, the original valve springs, which I don't know the spec of, weren't capable of controlling the valves over 8000rpm and led to piston valve contact.
They were perfectly happy at 7800rpm but as soon as the limit went up they cried wolf and went on strike.
Paddle shift solenoid and air lines in
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Life racing ECU fitted in it's new home
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Throttle blipper mount made
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All new BMRS oil lines made up
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New engine being timed up and just days away from collection
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New ECU loom being measured up
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Shouldn't be that far away, hoping for a first start in early August and a dyno session mid August.
Well there it is
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Strapped in the van, just got home, workshop tomorrow to get it in the car and finish some other jobs.
Hopefully won't be too much longer.
Very nice, good to see it’s still developing.
That's one pretty engine
Looks even better in here don't you think??Quote:
Originally Posted by millworm
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More progress,
Wiring now complete and in the car and tested
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Managed a system check for the paddle shift, which went well.
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Mapping looks likely to be early March.
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Well, I've done all I can, first start will be next Tuesday 31st March with first of 2 rolling road sessions that evening.
So close now.
Looking good, probably the cleanest install I’ve ever seen.
Thanks mate, we've really tried to make it all make sense!!!Quote:
Originally Posted by Marc
I'll just leave this here for anyone that may or may not want to look.....
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254bhp@8500rpm
193ft/lb@6000rpm
First minor adjustment.
We noticed on the dyno when shifting on WOT sparks appeared to come out of the alternator. Got the alternator out and upon closer investigation I found the pulley had been rubbing the chassis leg.
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Got the pulley off and fired up the lathe to adjust the pulley, just machined the outer edge off it as it's not really needed
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Had to shorten the end of the shaft out of the alternator too
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Done and ready to go back in
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Plenty of space there now
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I think the final solution will be a 4th engine mount to stop the movement. I'll discuss this with Ben and see what we can come up with.