73.5mm pistons question.
Turbo Mini Forums

At £200 I wouldnt consider that expensive. I'd give a couple of profiles a try myself.

Interesting that a US company has billet blanks to suit an A-series !!!!

When the time comes, would they be up for grinding me a couple to try ??

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

ooooh, roller lifters!

thats gonna be quality, will they require block mods, or do you have a sneaky easy fit solution to follower rotation?

Regards to the fuelling, What you need is about 4%TEL in Ethylene Dibromide, 2% Methyl Aniline and 1% Di-Cyclopentadiene. That should be good for about 130 MON using 95 unleaded as a starting point. 97/8 has added benzene.

Can anyone host a picture, I'll photograph my "race fuels" cookbook page.

Pete, can you give me a reading list about your cam timing/dynamic CR stuff, I'm interested in knowing what you're on about in detail!

Stu

Bugger off, I'm getting there.

Stu, pictures can be hosted using the uploader on the front page of this website, Http://www.turbominis.co.uk

Has anybody considered running LPG to make use of its higher octane?

Can you give me as much detail on the book as possible? I'll get a copy, guaranteed! I'm sure that the dynamic Cr calculation isn't in the vizard bible, I've virtually learnt it!

With regards to cam selection, I gave it quite a lot of thought, plotted a few graphs for a naturally aspirated engine which works, considered the boost and what flow would be needed in the exhaust. My conclusion was that the increase was huge and there was need for bigger everything for the exhaust. The Ph2 comes close to this but perhaps even better as a supercharger cam is the Kent 274 spi. According to my calculations, a SW5 is about as shite as you can get, run 1.5 rockers and it becomes a bit like a symmetrical 266. You need the extra exhaust clearance to prevent the dP hindering the inlet. Even for a N/A engine, I'd say that symmetrical cams like most pipers are probably not utilising the exhaust adequately.

Obviously my thoughts are a massive over simplification. I think an SPI cam would be brilliant on an engine running high boost and a low rev limit. MG Metro cam looks quite good also. Tried an MG cam which was quite nice.

I'd like to get my knowledge a bit more tight so I can make even more informed choices.

And that reminds me, I was having a think the other day about Jimsters 16 head and I reckon running an RS exhaust cam and the normal inlet is a good idea. It should clear a weeny bit better...........haven't had a look a graph though.

Bugger off, I'm getting there.

its in the second cam chapter in mine.