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Elongated holes is a bin the hub job, as far as I am aware. If the ball joint wobbles side to side, it's definitely elongated. Vernier should be ok, if you are careful. I used a CMM haha

Those are some good shouts, thanks! I don't think exhaust surrounds would be so good, not sure how hot they get... But I'll definitely get some test pieces done and try them! Maybe on a mates car though haha

I have access to decent plastic 3D printing and high accuracy 3d laser scanning equipment, and I've recently done a few bits for car interiors, where the originals have broken, so it's been glued and then scanned. Made me wonder if there are any interior bits on the clios that anyone thinks are...

Check it hasn't moved, if it's laying to one side, then will read funny/need zeroing. I'm not sure how zeroing's done, but that might help you.

True that, but a couple of the guys I work with are on here for sure haha. There's not much to spill in all honesty, except to say the engine's had a lot of work, and custom work at that. The values of these things are always difficult to work out anyway, it's mostly dependent on how much...

Yeah, I'd say that's the sort of ballpark. I'm not sure how much I can really say about it, obviously the owners of these things are usually pretty against information getting out, so I'm keen to keep most of the details under wraps, except the somewhat rare sight of 1*2's in the same shot as...

Trust me when I say this is a VERY special engine. We designed it, and it is pretty full on.

Ha ha didn't drive with it, it is road legal though, and on crossplies against R888's I don't think it would keep up with mine in the bends. Would f**k off on the straights though, a fairly hot engine in that one.

Had a D type in at work today and we couldn't resist getting some pictures before bringing the Jag inside.

The only reason to replace bolts is if they are stretch bolts like some con rod bolts. You tension them to yield, and then after use you need to replace them. Brake bolts are nowhere near that high a stress, so they don't need to be replaced. The only reason some pads come with new ones is so...

That is quite a good idea. I'd be surprised if there isn't already some literature to check my findings against too. I'll have to check out the somender-sing turbulence grooves too, I must admit I've not heard of them before!

Yeah, there have been a number of direct injection engines around before then. In terms of port injection becoming less common though, I would say that is more recent than 10-15 years ago. We are currently preparing some tests with really rough surfaced ports which we will run on our dyno. Not...

Most stuff in the last 10-15 years is port injection, direct gasoline injection is a relatively new technology. I would say it's only been appearing out on the roads in the last 4-5 years really. If you make the walls very smooth indeed, the lack of energy in the boundary layer means the flow...

My choice for a road car would be the powerflex purple dog bone mount. It's certainly solid enough to steady the engine properly, but not rock hard or thin enough to transfer too much vibration. I put the ktec racing one in my rally car, and I certainly would have taken it straight back out...

The problem with flow benches is that the flow doesn't move as quickly as it does through the ports when you run the engine. The only real way to test dimple performance is by testing the engine on the dyno. The issue is, if you can't show promise with CFD, very few people will give you the...

Ahh well in that case, it should be quite easy. I'd certainly do it while you have the chance to do it nice and easily if it was mine.

Definitely worth it imo as well. I did a guide not too long ago about getting the inner ARB bushes in without dropping the subframe or tarting about like that. Basically it's the only way I was able to do it, after some time of trying other ways... Tbf if following the guide it shouldn't be too...

Yeah, I saw that. Just offered to send the chap my paperwork. But from my research this is the exact treatment that is a waste of time, as you don't need dimples all along the port. Unfortunately this is usually done alongside cams and a load of other bits and becomes very hard to verify...

Dave you're bang on in your understanding of why the dimples help a golf ball. Essentially anywhere the flow stream separates from the body, dimples can be used to prevent/reduce this, so long as the flow isn't going too fast. So round the valve guides/stems, and as the flow turns round the...

No, the petrol/air interface in CFD would have put my simulation run times up from about 8 hours to about 250, and I'd have needed an extra 100GB of RAM or so. In a carburetted engine like the one I studied, it would have been good to do, but since it's largely irrelevant now days, with port...

Hahaha definitely should have!

The paper was just my final year project for my engineering degree, it hasn't been published or anything, although it was featured in my universities annual research feature journal thing. Anyway, there seems to be a tremendous amount of smoke and mirrors surrounding the truth with intake ports...

Well, I already had the rig, I do a bit of sim racing, so when I built it I beefed it up because I knew I was going to have to run these sims. I wouldn't spend any money on it myself, just get a real nice geometry shape and call it a day there. The dimpling all over the port is certainly a...

Hi Ezzat, I'll send it through when I get to my PC. It took about 8 months of running my home built computer round the clock to get all the results, on 8 cores at 5GHz AMD FX8350. I'm not sure I'd have done it for fun, but for the dissertation it was worth it ha ha! I'll be in touch mate

Ahh, just read it's a wasted spark engine, so putting 2+2 together that makes sense. Thanks so much mate, been at this for days! I'll be up there tomorrow to fight with it!

Hi, got a right swine of an issue with my 172 cup. It doesn't get used too often, was driving along the motorway and every now and then it would lose a cylinder, which would then come back. This progressed to full on running on two, with 2 and 3 not getting spark. Replaced coil, leads and plugs...

In that case, you might have more luck on the renaultforums.co.uk since most people on here are Clio RS owners. I presume the manifolds are the same as a mk2 clio 1.2, so you might get some luck though. Sorry I can't help.

I'm not trying to be offensive here, but what are you actually trying to do? If you're struggling this much with pulling the intake manifold off and getting to the injector rail, I'd worry a little about your ability to put it back together properly without it leaking. Last thing you need is...

if it's like a 172, that large top bit is a aluminium casting there to stop the fuel rail getting smashed in a frontal impact. It's held on with two nuts onto studs that are in deep recesses (counterbores) in the front of the casting. 10mm socket on an extension, undo them, pull it off. Once...

I didn't actually, I was aware of the requirements for good port geometry, and the port was designed to optimise mass flow rate. But that looks really interesting, I'll be sure to read it in the next few weeks because I would like to really closely examine the affects of surface roughness...