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buzzboy
Samba Member
Joined: August 07, 2008
Posts: 343
Location: OBX NC
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 Posted: Tue Feb 17, 2009 10:54 am Post subject: I topped out the bug... |
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| ...and I have no clue how fast I was going. Not having a speedometer is an issue. I know there is a calculator somewhere and I cannot find it. I have a 3.88 trans with 235/75/15 tires. I topped out at 3600 RPMs with a slight tail wind. Lets say the wind was strong enough that going the other way I was topped out at 50-55 mph. I only know that becuase I marked 55 on the tac. |
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Jeckler
Samba Member
Joined: September 27, 2005
Posts: 2718
Location: Mesa, AZ
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| Posted: Tue Feb 17, 2009 11:16 am Post subject: |
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About 85
You also need your 4th gear ratio, .93
http://www.car-videos.net/tools/speedrpm.asp
_________________
Andy
'63 Bug rebuild here.
Did you know that sellers can't charge a fee to accept PayPal?
| bill may wrote: |
| I am the crabby old guy. |
Knowledge is knowing that a tomato is a fruit.
Wisdom is knowing not to put it in fruit salad. |
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fastinradford
Samba Member
Joined: June 08, 2008
Posts: 2895
Location: Athens Ohio
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| Posted: Tue Feb 17, 2009 1:55 pm Post subject: |
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| I would say more along the lines or 75mph. I know all stock; 87mph=4500rpms. |
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buzzboy
Samba Member
Joined: August 07, 2008
Posts: 343
Location: OBX NC
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| Posted: Tue Feb 17, 2009 4:59 pm Post subject: |
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| My trans is an AH which I was told is 3.88 with a .89 4th. Now that I'm home, I finally found the calculator I used last time. It says I did 91. Pretty frickin scary in a beetle on a 2 lane road. Maybe next time I'll take it out in a hurricane for some real speed testing. |
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adams77
Samba Member
Joined: September 12, 2008
Posts: 221
Location: Statham, GA
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| Posted: Tue Feb 17, 2009 6:28 pm Post subject: |
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I want a pic of your bug on 235's 
that is the size I want to run |
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Jeckler
Samba Member
Joined: September 27, 2005
Posts: 2718
Location: Mesa, AZ
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| Posted: Tue Feb 17, 2009 6:43 pm Post subject: |
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An AH case normally has a 4.12 R&P with an .89 fourth. The AT case is a 3.88 with a .93. I suppose if it's been rebuilt, the lower gear set could've been installed.
Info from:
http://sandlizrd.baja.com/gears.htm
_________________
Andy
'63 Bug rebuild here.
Did you know that sellers can't charge a fee to accept PayPal?
| bill may wrote: |
| I am the crabby old guy. |
Knowledge is knowing that a tomato is a fruit.
Wisdom is knowing not to put it in fruit salad. |
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pafree
Samba Member
Joined: August 16, 2005
Posts: 2298
Location: dayton, the one in texas
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| Posted: Tue Feb 17, 2009 6:44 pm Post subject: |
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| just a thought. GPS's are getting cheaper and cheaper. get you one to tell how fast you are really going. |
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vwnewbie70
Samba Member
Joined: January 05, 2009
Posts: 64
Location: NW
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| Posted: Tue Feb 17, 2009 6:49 pm Post subject: |
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| i sencond that i would also like to see a picture of 235's |
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Joel
Samba Member
Joined: September 04, 2006
Posts: 11099
Location: NSW Australia
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| Posted: Wed Feb 18, 2009 3:15 am Post subject: |
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someone already put them in the bastards and abortions thread
a 1600 engine with 3.88 gearbox and an 0.89 4th would be like dragging a boat ancor behind u
_________________
Quick little bug, you got a Porsche motor in that?
1974 Germanlook 1303 2.5 Suba-Beetle |
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buzzboy
Samba Member
Joined: August 07, 2008
Posts: 343
Location: OBX NC
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| Posted: Wed Feb 18, 2009 5:29 am Post subject: |
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| Actually it moved a bit quicker off the line with the stock engine than it does with my cam'd 1641. Because the stock engine makes top torque near 2000rpms this actually kept the engine in the power band. |
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