Trapped 122 in the 1/4 Mile! Half - bridge and BW366
05-19-18, 08:55 AM
#1
Trapped 122 in the 1/4 Mile! Half - bridge and BW366
I've been tinkering with this car for years and finally got it running properly so I took it to the drag strip (cheaper than a dyno.) I wasn't sure what to expect because I built it and tuned it entirely myself. I knew it was fast, though, so I was hopeful. I'm about to drop in a Walbro 450 and upgrade the hard lines to run E85 (I've already done everything else), and is curious what I could run on stock lines and a Walbro 255.
I figured I only had one good pass because of the heat so I kept it at what I had been running, which was 20 psi (though it fell off some towards redline.)
I had a junk launch and bogged it pretty good leading to a 2.27 60', but ran 8.31@96 in the 1/8th and 12.36@122 in the 1/4 mile! I decidedly smoked a challenger 392 SRT with drag radials which was very satisfying.
I know I've got more time with a good launch, but it was just too damn hot and I need to improve my ducting. Hopefully I'll be back in a few weeks and can break into the 11s!
I figured I only had one good pass because of the heat so I kept it at what I had been running, which was 20 psi (though it fell off some towards redline.)
I had a junk launch and bogged it pretty good leading to a 2.27 60', but ran 8.31@96 in the 1/8th and 12.36@122 in the 1/4 mile! I decidedly smoked a challenger 392 SRT with drag radials which was very satisfying.
I know I've got more time with a good launch, but it was just too damn hot and I need to improve my ducting. Hopefully I'll be back in a few weeks and can break into the 11s!
05-19-18, 09:35 AM
#2
Full Member
Nice mate, That trap is good for mid to low 11s..
You can also through the 4.3 final ratios in it to help that there..
Personally I would replace the lines... Yes they are aluminium however I think they are only -6AN ? Check my build thread in my sig i am currently going through this process atm...
However for 20psi you will need at least x2 walbro 460s..... injectors may be a push....
You can also through the 4.3 final ratios in it to help that there..
Personally I would replace the lines... Yes they are aluminium however I think they are only -6AN ? Check my build thread in my sig i am currently going through this process atm...
However for 20psi you will need at least x2 walbro 460s..... injectors may be a push....
05-19-18, 09:52 AM
#3
Yeah, I'm putting in 1/2" stainless feed and 3/8" return lines. From what I have seen the one pump should be enough, but if I start running out I'm going to put in a surge tank with dual pumps since that walbro pump can still feed a ton at low pressures.
05-19-18, 06:45 PM
#4
Full Member
Hmm I personally don't think there is a need for surge tank.. You know the FC tanks have a small 1 litre baffle inside them already? and you can fit two walbro's in there fairly easy...
I think the key is to have a certain about of pressure through your reg... I am still trying to figure it all out, but you need min 43psi for around that 500hp mark... Anything more and it needs to increase....
I think the key is to have a certain about of pressure through your reg... I am still trying to figure it all out, but you need min 43psi for around that 500hp mark... Anything more and it needs to increase....
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