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-8 or -10?
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DRR Sportsman
Picture of Ron Gusack
posted
3000 lb car running 136/110 mph in good air. I've been using -10 which I think is way overkill but I wanted to be able to switch to E85 or Alky with no issues. I'm replacing the hose with ptfe stuff and thought about going to -8. ID on the -8 is .410 and it's .5 on the -10. I've seen guys claim they run factory 3/8 OD line and make 900hp with no problems but I'd like to hear it from guys I can trust.
 
Posts: 455 | Location: Maryland | Registered: January 23, 2007Reply With QuoteReport This Post
DRR Sportsman
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-8 is fine.


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Posts: 225 | Location: Usually home | Registered: January 27, 2013Reply With QuoteReport This Post
DRR Top Comp
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I would go with the -10


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Posts: 3972 | Location: United States of Texas | Registered: April 02, 2011Reply With QuoteReport This Post
DRR Pro
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-10
 
Posts: 1250 | Location: USA | Registered: December 04, 2008Reply With QuoteReport This Post
DRR Top Comp
Picture of wideopen231
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8 will work fine.Most alky pumps(belt driven) have -8 in bottom and your smallest hole is the biggest hole in system.

A -10 will carry more capacity to pump inlet and if you have any 90* fittings it will help since they are fairly restrictive. Down side is extra weight of line and fittings.




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Posts: 4170 | Location: Greensboro NC | Registered: May 24, 2011Reply With QuoteReport This Post
DRR Sportsman
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A BIG downside of using a -10 line (with a rear mounted fuel cell) is the excessive weight of the fuel in the line, trying to be moved to the front of the car against g-forces.


I used to be a people person, but people ruined that.
 
Posts: 225 | Location: Usually home | Registered: January 27, 2013Reply With QuoteReport This Post
DRR Pro
Picture of 00 DEAD ON
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Depends on the fuel pump JMO.


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Posts: 1026 | Location: Stafford, Virginia | Registered: October 03, 2006Reply With QuoteReport This Post



DRR Sportsman
Picture of Ron Gusack
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Pump is a Magna Fuel Quickstar 275 with 18 psi. I never had any issues with fuel delivery that I know of. I plan to continue to run gas but I don't want to have to change the line again if I switch to alky. Fuel pressure stays constant at 6 all the way down the track.
 
Posts: 455 | Location: Maryland | Registered: January 23, 2007Reply With QuoteReport This Post
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I have experienced that myself


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Posts: 1390 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Sportsman
Picture of Richie
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W/ the option of going Alky later I'd go w/ -10. Be CAREFUL not to kink the ptfe tubing, -10 is not as forgiving as the -08. There are some mfg.'s that use a thin innercore.
 
Posts: 254 | Location: Windsor locks Ct. | Registered: November 25, 2004Reply With QuoteReport This Post
DRR Sportsman
Picture of Ron Gusack
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quote:
Originally posted by Richie:
W/ the option of going Alky later I'd go w/ -10. Be CAREFUL not to kink the ptfe tubing, -10 is not as forgiving as the -08. There are some mfg.'s that use a thin innercore.

That's my main reason for switching to -8. I have to make a 90 degree turn to the regulator and I don't know if the ptfe -10 will do it. I was planning to use Orme Brothers hose because they told me theirs is made by the same company that makes Fragola.
 
Posts: 455 | Location: Maryland | Registered: January 23, 2007Reply With QuoteReport This Post
DRR Pro
Picture of Eman
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If I ever replace my aluminum fuel line I will put the cell in the front. That will make it easier and cheaper.
 
Posts: 1451 | Location: E TN | Registered: February 13, 2009Reply With QuoteReport This Post
DRR Sportsman
Picture of Richie
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Ron, you have to make the bends w/ fittings and not the hose...some MFG's. use a thicker innercore - that helps....Teflon hose doesn'thave a shelf life and if you have crimp on fittings > you could tow the car with it!
I'd still go -10 just choose fittings/adapters wisely...
 
Posts: 254 | Location: Windsor locks Ct. | Registered: November 25, 2004Reply With QuoteReport This Post
DRR Pro
Picture of HS professor
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quote:
A BIG downside of using a -10 line (with a rear mounted fuel cell) is the excessive weight of the fuel in the line, trying to be moved to the front of the car against g-forces.



Never thought of that, makes sense.... HMMMM

I was just talking to a buddy who had a legit 8.50 155+ Mustang street car with a 600+ Ford engine. He ran a Mallory 250 pump and -8 line Eek
 
Posts: 1421 | Location: Monroe twp nj | Registered: December 05, 2005Reply With QuoteReport This Post



DRR Sportsman
Picture of Ron Gusack
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Orme Brothers site says -8 has a bend radius of 4.5 inches, whatever that means. I'm calling them to see what the deal is cause I don't want to have to use fittings to make 90's. I've never heard of that before.
 
Posts: 455 | Location: Maryland | Registered: January 23, 2007Reply With QuoteReport This Post
DRR Sportsman
Picture of Richie
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Ron, That means the max you can bend the hose is around a 9" circle. -10 will be greater... Try to get tube style fittings - most manuf. offer these. Teflon will actually flow faster thru the I.D. -vs- rubber. =smoother. In a really high flow / flammable fluid you would use a conductive innercore (this will be conductive from 1 fitting to the other to prevent static discharge which could arc / blow a hole thru the innercore to the braid and mix in flamm. fluid and ya got a Party!!
 
Posts: 254 | Location: Windsor locks Ct. | Registered: November 25, 2004Reply With QuoteReport This Post
DRR Sportsman
Picture of Ron Gusack
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Orme Brothers tech told me 4.5 bend radius means if you take a piece of -8 hose and bend it so both ends are pointing in the same direction, it will measure 4.5 inches between the hoses. Maybe I got the wrong tech man.
 
Posts: 455 | Location: Maryland | Registered: January 23, 2007Reply With QuoteReport This Post
DRR Sportsman
Picture of Richie
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The term radius is always 1/2 of the dia. so 4.5 x 2 = 9" going by his version, there would be 9" in between hoses, easy mixup. Temp plays a role in bend radius as well, gas & alky no problem...
 
Posts: 254 | Location: Windsor locks Ct. | Registered: November 25, 2004Reply With QuoteReport This Post
DRR Pro
Picture of Eman
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4.5" radius means a 28.25 in circumference circle. Tie a pencil to a string and hold the string 4.5" from the pencil and draw a circle. That's a 4.5" radius.
I think it's like PEX tubing where you can bend a radius 6x the diameter of the tube. They make a guide to hold PEX tubing, you could use one of those as a guide possibly.
 
Posts: 1451 | Location: E TN | Registered: February 13, 2009Reply With QuoteReport This Post
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