Finally got to track.. Vids. E85 questions also
Finally got to track.. Vids. E85 questions also its a 370ci w/ a PT76GTS truck manifolds, E85, Powerglide, 9" w/ 3.50 gears, Full weight, stock shocks/springs, 275/60-16 MT drag radial
18psi boost
14 degrees timing.
Foot braking off the line, not really making any boost
This was just some test runs, first pass was really rich, mid range 10.2:1 an then leveled out at 11.0:1 I leaned it out a little and it picked up 4mph, Still a little rich as it gets into boost, then tapering up to 11.4:1, but as I started to lean it out it ran better and it started spinning and then my brakes started making a grinding noise so I quit for the day.
Whats safe for timing on these? 18psi and E85?
Also some people at track told me I should be around 12:1 A/f w/ E85.. ??
That seems lean as hell.. I was aiming for 11:4ish. ???? What are others targeting?
1st pass on this combo, really rich
http://youtu.be/IEmU8SCAbOc
2nd pass tried to build boost and blew the tires off.
3rd pass after I leaned it out some.. picked up some MPH
http://www.youtube.com/watch?v=mM1sFB5zX4o
My last pass I leaned it out more, blew the tires off and ran a 10.60 @ 141
18psi boost
14 degrees timing.
Foot braking off the line, not really making any boost
This was just some test runs, first pass was really rich, mid range 10.2:1 an then leveled out at 11.0:1 I leaned it out a little and it picked up 4mph, Still a little rich as it gets into boost, then tapering up to 11.4:1, but as I started to lean it out it ran better and it started spinning and then my brakes started making a grinding noise so I quit for the day.
Whats safe for timing on these? 18psi and E85?
Also some people at track told me I should be around 12:1 A/f w/ E85.. ??
That seems lean as hell.. I was aiming for 11:4ish. ???? What are others targeting?
1st pass on this combo, really rich
http://youtu.be/IEmU8SCAbOc
2nd pass tried to build boost and blew the tires off.
3rd pass after I leaned it out some.. picked up some MPH
http://www.youtube.com/watch?v=mM1sFB5zX4o
My last pass I leaned it out more, blew the tires off and ran a 10.60 @ 141
Damn makes me want to upgrade to this turbo lol. I'm so torn between this turbo and the S480 or the 4788. But knowing this thing will drop right in for my TC78 makes it very appealing.
Very nice runs for first time out!!!
Very nice runs for first time out!!!
First vid looks like your were coming in fast on a car still on the track that hadn't turned out yet, scary! I've seen that happen many times at our local track when they are trying to pack in as many runs as possible. You would think cars going your speed could at least get a clear track to navigate!
First vid looks like your were coming in fast on a car still on the track that hadn't turned out yet, scary! I've seen that happen many times at our local track when they are trying to pack in as many runs as possible. You would think cars going your speed could at least get a clear track to navigate!
1.41 and a 1.42 I tried coming off a little harder but the drag radials didnt like it. I'll probably ditch the factory suspension this winter, get a slick, and I have to get a different driveshaft, yoke, and pinion support on the 3rd member then i'll try the transbrake.
Last edited by pwrtrip75; Nov 6, 2011 at 11:32 AM.
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I have a twin turbo 370'' lq4 with a blowthru carb and distributor.It's 9.5-1 and has 20 deg of timing,with ngk bp7efs plugs.I am running it on E98 with no intercooler and it runs 12.0-1 on the gas scale and the plugs look good at 10.5 psi.
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congrats on the runs! what rpm did you see through the traps?
what kind of iat's do you see?
what kind of iat's do you see?
1.41 and a 1.42 I tried coming off a little harder but the drag radials didnt like it. I'll probably ditch the factory suspension this winter, get a slick, and I have to get a different driveshaft, yoke, and pinion support on the 3rd member then i'll try the transbrake.
not a bad 60 at all,. methinks your car must be quite heavy
Now I have to wait till spring to see what more its got in it
Damn Wisconsin. 
6.1 @ 113 on my first pass, the run with the better 1/4 mph (141) went 112mph in the 1/8. I'll post the time slips when I get home, I have them on facebook and work blocks that site....bastards..lol.
I dont know how accurate those online HP/mph/weight calculators are, I punched the numbers in and it came up with 849hp.
Now I have to wait till spring to see what more its got in it Damn Wisconsin.
I dont know how accurate those online HP/mph/weight calculators are, I punched the numbers in and it came up with 849hp.
Now I have to wait till spring to see what more its got in it
Damn Wisconsin. thats pretty fast. id say the timing will help it some on the back half.
you are probably close in your assumption. i use the reher morrison chart for a rough estimate - i think its a little happy but it gives an idea
http://www.rehermorrison.com/PdfFile...eriesHP_ET.pdf
