crankshaft weights
Turbo Mini Forums

i think what paul is saying is that swifty is bullshitting alledgedly, as if hes told Paul he " beleives" it suggests he has ne test data to prove otherwise,

I probably wouldnt say bullshitting, he does have the knowledge and the dyno to test it, and he is putting one in his own new historic racer. But for 1/4 mile which as everyone knows is all Im interested in, I dont believe its the way to go.
Paul

I seriously doubt it!

ok .i'll retract the bullshitting reference,

iv'e always had a hankering to try a completely counterbalance less crank.

let's have all your'e thoughts on this ,


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Theres some chap's experimenting with heavy metaling rover k-series cranks, didnt look to much into it as astronomical rev's and no torque isnt really my thing, but an interestign subject one the less!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Carl, i know what you mean. Have you seen the Slap Head cranks?
He takes off all the counterbalance as you say, Baldwin swears its great. Selby also does this and Dick and Max Hunter say theyre great. They end up looking like a bent up piece of wire.
If my car wasnt used on the road Id give it a go as longevity wouldnt be such an issue. If I were you or John Haston, I definately would do it.
Paul

I seriously doubt it!

After all it worked in the 1930's austin seven's (joking)
Regards
Dave

There is one of Slapheads cranks in the workshop, as you say paul, no counterbalance at all! They do the job though!

Team www.sheepspeed.com Racing

MMMmmm, the crank ive seen from dave wells still had some counterbalance,,

i'm off to look again,

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

http://www.shengineering.co.uk/pcmcrankshafts.aspx.

this one you meen Jim,

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That is similar to what mine is, but Ive seen him take a lot more than that off.
Paul

I seriously doubt it!

I cannot understand how he dares to remove som much material form the area around the big end. Wouldn't oil pressure drop?

Front running 7s run minimal pressure, according to Max Hunter around 15psi. But I cant see that the vrank would cause low pressure as the oil is still compressed by the bearing itself. In theory it shouldnt need that extra metal around the big end, removing it does help with counter balance.
Paul

I seriously doubt it!

the crank in then pic appears to be for a 998 ,



carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

well i'll drag this one back up.

all this talk of the counterbalance less cranks got my old matter going, it has been sat there in the back of my mind for years ,ever since i read about Eslinger engineering in the USA running a form of balanceless crank in there sandrail dragster pinto engines, although i couldn't find a pic at the time i always thought if they can why cannot us A series users,
i was just to cautious to take the plung, but seing as others have it seems they migh be a goer,
so ive had a go,

it just needs a gring now, i'm debating whether to backdrill, they take so long to modify by the time comes to backdrill i'm sick of working on them.
i'm off to get some piccies.

just weighed it at 9.54 kg
carl

Edited by fastcarl on 26th Feb, 2007.

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Bet it looks too good to put in an engine where all that hard work wont be seen

which is why you take piccies first,lol then fit a transparent sump. ther's just no substitute for bar HP.

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http://i24.photobucket.com/albums/c2/carl1964/bvbv.jpg

http://i24.photobucket.com/albums/c2/carl1964/cfbnop.jpg

http://i24.photobucket.com/albums/c2/carl1964/678.jpg

http://i24.photobucket.com/albums/c2/carl1964/-09.jpg

Edited by fastcarl on 26th Feb, 2007.

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Thats more like Daves one that I saw. You could shave in the reflection.
Paul

I seriously doubt it!

As usual beautiful work from MR Austin

Oh well ,it only took 24 hours to talk myself intpo backdrilling, o at least Vegard will be happier,lol.

http://i24.photobucket.com/albums/c2/carl1964/mmm.jpg

http://i24.photobucket.com/albums/c2/carl1964/bhy.jpg

now with extra polish,lol.
not that you'll see it when its herdened,

http://i24.photobucket.com/albums/c2/carl1964/zzas.jpg

Edited by fastcarl on 28th Feb, 2007.

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looks really nice!

My backdrills are 3/8" deep, you can lose some more weight.
Paul

I seriously doubt it!

lol, vert good vegard!

Team www.sheepspeed.com Racing