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Posted: Mar 28, 2007 2:07 PM
by c_spargo
turbodan wrote:T_C_D wrote:c_spargo wrote:
So what's the bottleneck there? The stock flow through the head? The AFM? ( I think it's funny the AFM necks down to significantly smaller that any of the rest of the intake system at the entrance where it gets rectangular...)
The 2 valve cyl head.
Even 2v heads can be made to run top end. I've seen some dynos with hot cams and ITB's that made remarkable power remarkably high up. The one thing I've never seen from a tuned BMW 2v engine is a good low end. 4v engines like the s54 or s38 always seem to have more low end and a less remarkable climb onto the powerband. A very flat torque curve. The most aggressive 2v motors always take a big step onto the powerband. I prefer that kind of engine. I also grew up racing two strokes. Coincidence?
2 or 4 wheel 2strokes?
Posted: Mar 28, 2007 2:20 PM
by turbodan
Two wheels.
Posted: Mar 28, 2007 3:09 PM
by c_spargo
turbodan wrote:Two wheels.
(THREAD HIJACK!)
Like this?
or like this?
Took my dad till he was 60 to lap the speedway, but we got it on film too.
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Posted: Mar 28, 2007 3:19 PM
by turbodan
More like this:
A washed out old picture from 2001, about halfway through 90 feet. No pavement for me. Too much traction, and it gets far too ugly when you cant find enough of it. I don't have any good pictures from actual competition. Technically I only raced for two years. Been riding for more than ten. Tons of good times though.
Posted: Mar 28, 2007 6:04 PM
by 90e34535i
Theres a lot of Cam'd Race M10's making max power after 7500 rpm.(though very little torque)
A b35 head with a higher flowing intake manifold and slightly higher duration cam then stock, I bet would make real nice High rpm power.
Posted: Apr 14, 2007 12:33 AM
by Jimmie G
Any news on the turbo shop upgrade for the kkk todd?
Jimmie
Posted: Apr 14, 2007 1:08 AM
by ///ARINUTS...
Jeremy wrote:Stock cam. Torque will come on and fall off later with a more performance oriented cam. BMW designed these motors to have a nice fat mid range for the typical American consumer and succeeded on that front quite nicely.
Jeremy
E23 745i was for euro market only. Is there something I'm missing here?
Maybe if someone could find a porsche 930 KKK K27, and swap out the exhaust housing, perhaps this might be a slight improvement.
or perhaps , one of these could help.......
http://cgi.ebay.com/ebaymotors/PORSCHE- ... dZViewItem
http://cgi.ebay.com/ebaymotors/Used-Por ... dZViewItem