Prepared Class Questions.

Prepared Class Questions.

Postby Super1303 » Wed Dec 30, 2015 4:34 pm

I can't seem to figure this out, I need a little help.
I'm building a new engine and want to know how it factors in.

First: C. Cars with a throttle plate area of less than 0.65 mm2/cc : Deduct 12% of
actual displacement. :?:
-I have, currently, an 1835cc engine with Two 40mm throttle plates. I can't seem to make this math work.
With the strokes available I can build a 2210cc engine using the same carbs. But with this factor, if it applies, dose it give me that -12% making it a 1945cc engine keeping me in P3?

Also what or where is: Sec. 2.C.4 (DOT tires)
-Not that I'm going to base my engine on this but I'd like to know.


PREPARED 1 – Cars with a displacement of 4501cc to 8000cc.
PREPARED 2 – Cars with a displacement of 2201cc to 4500cc.
PREPARED 3 – Cars with a displacement of 1601cc to 2200cc.
PREPARED 4 – Cars with a displacement of 1600cc and less.

Thanks, Evan
Last edited by Super1303 on Wed Jan 06, 2016 9:38 am, edited 1 time in total.
Hello, my name is Evan and I'm a Volksaholic.
1973 Super Beetle, #666
User avatar
Super1303
 
Posts: 225
Joined: Wed Mar 27, 2013 11:15 pm
Location: 935 US Route 5, Sutton, Vermont 05867

Re: Prepared Class Displacement Factor Questions.

Postby 3rdgendennis » Wed Dec 30, 2015 6:03 pm

2....
C. Wheels/Tires
3. Street tires: visible tread the full width of the tire, no cord separation,
DOT#, good tire condition.

looks like 4 is missing or was revised at some point.

40mm^2*pi/4=1256.637 mm2
1256.637*2=2513.274 mm2
2513.274mm2/2210cc=1.137mm2/cc
The youngest David Dennis
"If you're not living on the edge, you're taking up too much space"
Dennis Motorsports
User avatar
3rdgendennis
 
Posts: 295
Joined: Sun Feb 08, 2009 9:29 pm

Re: Prepared Class Displacement Factor Questions.

Postby Super1303 » Wed Dec 30, 2015 6:56 pm

Awesome!
The 4 is where I was lost, were's the 4?? Is this 4 somewhere I don't know about?
OK thanks, got it.

So my math wasn't toooo far off, makes me feel better. :D
Now I see how it's applied.

Thanks again.
Hello, my name is Evan and I'm a Volksaholic.
1973 Super Beetle, #666
User avatar
Super1303
 
Posts: 225
Joined: Wed Mar 27, 2013 11:15 pm
Location: 935 US Route 5, Sutton, Vermont 05867

Re: Prepared Class Displacement Factor Questions.

Postby walterclark » Sun Jan 03, 2016 11:09 pm

You probably figured it out, but just in case...The description of the requirements for tires to get the P class 12% credit is in the Tech and Safety Requirements, not Classification.
The older I get the better I was.
User avatar
walterclark
 
Posts: 1442
Joined: Sun Feb 08, 2009 12:57 pm
Location: Dover, MA.

Re: Prepared Class Displacement Factor Questions.

Postby KevinGale » Tue Jan 05, 2016 7:33 pm

We must have revised it. We sometimes have to renumber when something is dropped and sometimes we miss a reference. I'll try to remember to clean this up when I edit in the changes this year.
User avatar
KevinGale
 
Posts: 837
Joined: Thu Sep 04, 2003 3:01 pm
Location: Sutton, NH


Return to Engine/Performance

Who is online

Users browsing this forum: No registered users and 1 guest

cron

x