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Can a pict 30/31 carb on a 1600 DP cause overheating?
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skitzoidbugger
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Joined: January 02, 2006
Posts: 61
Location: NE Florida
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PostPosted: Sat Nov 09, 2019 7:34 am    Post subject: Re: Can a pict 30/31 carb on a 1600 DP cause overheating? Reply with quote

mandraks wrote:
skitzoidbugger wrote:


I know these are not power houses, but it does seem like it revs awfully high to get up to speed. I never made it past 40mph. I'm running 14" stock rims with 195-60-R14 tires. Should I go to a taller tire to decrease engine RPM?



a 195/60/14 has a 23 inch diameter, that is a honda civic tire diameter

you need a MUCH taller tire to get stock gearing. like at least 26 inches, compare to 7.00x14 bias plies. a 195/75/14 or so would work or a 195/14

Make sure to choose a C rated tire, 6 or 8 ply, or say 100 or so load rating

Hmmm..just measured the diameter and they come out at about 22 & 3/4". I put them on years ago as "rollers". I'm thinking a much taller tire will calm down some of the lane wandering. Thanks
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skitzoidbugger
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Joined: January 02, 2006
Posts: 61
Location: NE Florida
skitzoidbugger is offline 

PostPosted: Sat Nov 09, 2019 8:36 am    Post subject: Re: Can a pict 30/31 carb on a 1600 DP cause overheating? Reply with quote

mandraks wrote:
skitzoidbugger wrote:


I know these are not power houses, but it does seem like it revs awfully high to get up to speed. I never made it past 40mph. I'm running 14" stock rims with 195-60-R14 tires. Should I go to a taller tire to decrease engine RPM?



a 195/60/14 has a 23 inch diameter, that is a honda civic tire diameter

you need a MUCH taller tire to get stock gearing. like at least 26 inches, compare to 7.00x14 bias plies. a 195/75/14 or so would work or a 195/14

Make sure to choose a C rated tire, 6 or 8 ply, or say 100 or so load rating

Holy over speed batman! Just did the math. My DC came with a 7.00-14 tire from the factory with a .82 :1 fourth gear & rgb's. Short story is the factory set up equals 752.5 tire revolutions per mile. My setup is running 869 revolutions per mile (+116 revs).
Definitely new tire time!
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tasb Premium Member
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PostPosted: Yesterday 10:47 pm    Post subject: Re: Can a pict 30/31 carb on a 1600 DP cause overheating? Reply with quote

skitzoidbugger wrote:
tasb wrote:
VWAdam wrote:
My Bus has a 1600 single port with a 30/31 built by Volksbitz on my Bus, SVDA distributor and my Bus has no overheating issues. Even in 100 degree southern heat.


You've got a mis-match there. A 30/31 PICT should be mated to a SVA advance distributor.

I'm now running a 34 Pict 3. Sound ok with a 009?


No, it's common for that combination to exhibit partial throttle hesitation. Ok at idle and full throttle. At least you're not having vacuum advance mismatch issues.
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