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Old 04-29-2019, 05:36 PM   #1
OriginalSterm
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Fuel displacement blocks

I have a late 325 tank in what is being raced as a 318is. The rules state I can't run the bigger tank without being bumped to a higher class. I am allowed to add displacement blocks (or balls) but which side of the tank makes the most sense? More of driver's side? Passenger side? Split them up evenly?
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Old 04-29-2019, 05:52 PM   #2
squidrope
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Not sure how you could get them on the drivers side? GL and looking forward to what you did.
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Old 04-29-2019, 06:04 PM   #3
OriginalSterm
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Isn't there access through the sending unit hole?
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Old 05-02-2019, 07:02 PM   #4
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Yup. 42 ping- pong balls and off you go.

Or slug the bottom of the driver's side with a 5 lb dead blow until it's
12 smaller.

t
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Old 05-03-2019, 05:07 AM   #5
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Quote:
Originally Posted by TobyB View Post
Yup. 42 ping- pong balls and off you go.

Or slug the bottom of the driver's side with a 5 lb dead blow until it's
12 smaller.

t
Denting the tank is the easiest option and my first choice, except the rules clearly state I can't do that. So ping pong balls (or similar) is probably the way to go. Do I put them all of the driver's side away from the pump? Do I split them up evenly?
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Old 05-04-2019, 09:54 AM   #6
TobyB
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Boy, I would put them on the driver's side, for sure.
DO make sure they won't dissolve in fuel! THAT
would make a holy mess!

I'm hampered by having taken apart too many other cars
recently- isn't the late tank a 'saddle' tank, with a connected
top? If it is, they're just going to float around up on top
anyway, so it won't matter.

t
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Old 05-04-2019, 11:39 AM   #7
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I'm much more familiar with the early 325 tank and the crossover tube. I thought the late style use a syphon to pull fuel over?
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