Recent content by Andrew Cooke

nope, I'm in Oxfordshire

Not much to report, but a bit of a milestone for the Twingo, it's just clicked over 200,000Kms. It clicked over 190K in the pitlane at Mallory park, but since then it's just been running to and from work. Everyone knows how unreliable these F4R swaps are, especially when using an unlocked...

this looks similar, but not identical http://www.gg-motorsport.homepage.t-online.de/catalog/index.php?cPath=95_25_28_46

That looks a bit special, straight cut crownwheel and bolt on flanges, Sadev maybe? Not a gripper I'm sure as they use standard driveshafts.

You have the confidence of a man who's never broken or bent a damper bolt. Note that it's designed to hold a soft road damper, it's now holding up the back of car. You may well be right in your confidence, me, I'd brace it.

That bolt looks awfully flimsy for what it's trying to do, is it possible to brace to the axle to put it in double shear?

That may, or may not, be a great thing to do. Only trying it would confirm. I think I'd want an adjustable pulley fitted at the same time though.

I don't think it's practical to run one all the way to the arctic circle

all this torque talk makes me glad to have a gearbox. Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. Archimedes

I think you have that back to front, a small turbine won't be restrictive (ie more pressure in the exhaust manifold than the inlet manifold) until it makes boost, so you can run the overlap at low boost and gain spool, but you will need to get rid of it on boost/high revs. Simply put, if...

it's all about the cams, SR20DET and F4RT have mild cams with almost no overlap so can live with the backpressure of a small turbine. The F4R has what is more like a race cam to a turbo engine so you have to size the turbo to suit, if you get it right it'll piss all over an SR20, get it wrong...

except that he map sensor is pretty much in the plenum and you're making flow improvements after that.

I do like your replies:D - I used to know it all, now I have experiance...

PH1 twin cat 132 CFM 182 cat 110 CFM Magnaflow 59926 200 cell metallic cat 215 CFM KTEC 172 decat 300 CFM @10" H2O