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Search took 0.01 seconds. Search: Posts Made By: autodoctor911

Forum: Boxster & Cayman Forum

06-14-2013, 03:47 AM

Replies: 1

I have one suggestion for converting a returnless engine to fit in a chassis with a return type chassis.

Views: 288

Posted By autodoctor911

I have one suggestion for converting a returnless...

I have one suggestion for converting a returnless engine to fit in a chassis with a return type chassis. use the returnless fuel rail from the engine and install a fuel filter with built in fuel...

Forum: Porsche Autocross and Track Racing

06-10-2012, 11:48 AM

Replies: 223

Does Roll-Center height have much effect?

Views: 59,950

Posted By autodoctor911

Well the question was "Does Roll-Center height...

Well the question was "Does Roll-Center height have much effect?".
I was trying to help demonstrate, with some examples, how a race car can have a roll center that is far from ideal, whether it be...

Forum: Porsche Autocross and Track Racing

06-10-2012, 11:30 AM

Replies: 10

smart sway clear, again

Views: 931

Posted By autodoctor911

It looks like just the mount and the clamp...

It looks like just the mount and the clamp portion of the Al arm are making destructive contact. If this is happening at any speed above 5 mph, it may be best to use a different design bar.
If it...

Forum: Porsche Autocross and Track Racing

06-10-2012, 01:25 AM

Replies: 52

tyre width vs HP

Views: 3,733

Posted By autodoctor911

What are the rules again? I have, so far: up...

What are the rules again? I have, so far:
up to two inches wider than stock(wheel or tire?),
must run same tires in wet and dry conditions(does this mean you have to use one set of tires all...

Forum: Porsche Autocross and Track Racing

06-10-2012, 12:59 AM

Replies: 52

tyre width vs HP

Views: 3,733

Posted By autodoctor911

I have had much experience with PCA instructors...

I have had much experience with PCA instructors trying to pass on vehicle dynamics, car setup, and car modification/construction knowledge that is dead wrong. I guess they pass the bad info around to...

Forum: Porsche Autocross and Track Racing

06-09-2012, 10:53 PM

Replies: 223

Does Roll-Center height have much effect?

Views: 59,950

Posted By autodoctor911

OK, so the jacking force is not negated, but it's...

OK, so the jacking force is not negated, but it's effect of unwanted body/suspension movement is minimized by the other factors. In fact it is the other forces limiting the suspension movement that...

Forum: Porsche Autocross and Track Racing

06-09-2012, 02:41 PM

Replies: 223

Does Roll-Center height have much effect?

Views: 59,950

Posted By autodoctor911

interesting thread. I know that a formula one...

interesting thread. I know that a formula one suspension is about as applicable to a 911 as an off=road racer, but both are extreme examples of high roll centers, dictated by the parameters of the...

Forum: Porsche 911 Technical Forum

05-19-2011, 06:57 PM

Replies: 32

17-inch Rota wheels - some questions about going up two sizes from 15-inch Fuchs...

Views: 5,553

Posted By autodoctor911

a 225 width tire will only stick out 10mm, or...

a 225 width tire will only stick out 10mm, or about 3/8 of an inch more than a 205 width tire, since it is only 20mm wider and half of that will stick out to the inside.

Forum: Boxster & Cayman Forum

09-25-2010, 08:58 AM

Replies: 1

m620 optIon on 99 model 996

Views: 1,413

Posted By autodoctor911

m620 optIon on 99 model 996

I AM CONIDERING DOING A 3.4 conVERsion on MY 99 BOXSTer, anD AM wonderinG WHAT dME THE 996 With M620 OPTIONXx(Electronic tHrotTleX) USES, AND IF MY DME CAN RUN IT. IF SO Then POSSIBLY i could usse...

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