Twin turbo non pi track vid.
04-03-2007, 02:08 PM
#21
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RE: Twin turbo non pi track vid.
ORIGINAL: 96 myztic
you figure with a better 60 ft (1.7ish) hes still gonna barely be scrapin the mid-high 12s, seems a bit low for a 400+hp car (guessing by the trap speed.) Maybe step up the gearing to a 3.73 or higher(dont know what is best for keeping turbos spooled) and id think the ET would drop considerably considering how hard it likes to pull when it starts to spool on the top end.
I think a 4.10 would be too high as it might not be enough to carry you across the trap with the kinda hp/speed you are carrying already.
Also the sticky tires would help immensely as you could brake boost it and really help those 60s when you can put the extra hp to the ground.
you figure with a better 60 ft (1.7ish) hes still gonna barely be scrapin the mid-high 12s, seems a bit low for a 400+hp car (guessing by the trap speed.) Maybe step up the gearing to a 3.73 or higher(dont know what is best for keeping turbos spooled) and id think the ET would drop considerably considering how hard it likes to pull when it starts to spool on the top end.
I think a 4.10 would be too high as it might not be enough to carry you across the trap with the kinda hp/speed you are carrying already.
Also the sticky tires would help immensely as you could brake boost it and really help those 60s when you can put the extra hp to the ground.
All you need is about a 105mph trap with a 1.8 60' in a 96-04 to run near a flat 13 or very high 12 with a good driver.
From what I saw in the video, he's just waiting for the car to bog coming off the line to catch traction & then roll back into the throttle. If he went with a taller drag radial/slick, he could benefit more from a 4.10 than a 3.73...
04-03-2007, 02:20 PM
#22
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RE: Twin turbo non pi track vid.
ORIGINAL: Dan04COBRA
My lowest trap speed was 112mph & I still ran a 12.8 with a 2.1 60 foot... With traction that 112 would have been good for a miw low 12...
All you need is about a 105mph trap with a 1.8 60' in a 96-04 to run near a flat 13 or very high 12 with a good driver.
From what I saw in the video, he's just waiting for the car to bog coming off the line to catch traction & then roll back into the throttle. If he went with a taller drag radial/slick, he could benefit more from a 4.10 than a 3.73...
ORIGINAL: 96 myztic
you figure with a better 60 ft (1.7ish) hes still gonna barely be scrapin the mid-high 12s, seems a bit low for a 400+hp car (guessing by the trap speed.) Maybe step up the gearing to a 3.73 or higher(dont know what is best for keeping turbos spooled) and id think the ET would drop considerably considering how hard it likes to pull when it starts to spool on the top end.
I think a 4.10 would be too high as it might not be enough to carry you across the trap with the kinda hp/speed you are carrying already.
Also the sticky tires would help immensely as you could brake boost it and really help those 60s when you can put the extra hp to the ground.
you figure with a better 60 ft (1.7ish) hes still gonna barely be scrapin the mid-high 12s, seems a bit low for a 400+hp car (guessing by the trap speed.) Maybe step up the gearing to a 3.73 or higher(dont know what is best for keeping turbos spooled) and id think the ET would drop considerably considering how hard it likes to pull when it starts to spool on the top end.
I think a 4.10 would be too high as it might not be enough to carry you across the trap with the kinda hp/speed you are carrying already.
Also the sticky tires would help immensely as you could brake boost it and really help those 60s when you can put the extra hp to the ground.
All you need is about a 105mph trap with a 1.8 60' in a 96-04 to run near a flat 13 or very high 12 with a good driver.
From what I saw in the video, he's just waiting for the car to bog coming off the line to catch traction & then roll back into the throttle. If he went with a taller drag radial/slick, he could benefit more from a 4.10 than a 3.73...
I think his low times werent just from the low 60s, because even with a 2.0 or 2.1 he should still be hovering around 13.0, rather i think it was because of that off the line bog and having to build back up the power as the turbos spooled at the top of 3rd and 4th. Losing that off the line momentum after the 1-2 shift because of the big rpm drop due to bogis killing the ET.
04-03-2007, 02:34 PM
#23
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RE: Twin turbo non pi track vid.
The bog off the line is definitely hurting him, but it also looked like his shifts weren't crisp at all. Takes some practice I guess. It's tough driving a 400+rwhp on street tires at the track.
04-03-2007, 03:50 PM
#26
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RE: Twin turbo non pi track vid.
I'm impressed, even if the car isn't up to its full potential I'm a big fan of home engineered turbo setups that make their way to the track. I'm sure as others mentioned with stickier tires and some suspension work I'm seeing low 12's.
04-03-2007, 03:54 PM
#27
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RE: Twin turbo non pi track vid.
ORIGINAL: czwalga00gt
How much rwhp?
How much rwhp?
I posted a sheet on a thread a while back that sheet was from the third to the last run. Anyways please feel free to through all the ideas you can at me about what to do for launching. I like the idea of taller slicks and stiffer gears, I just have to not go to steep because the turbos like to spool under load and gears will take away from that a bit. Maybe like 3.55 or with same size tire just shorter rim like welds or soomthing. My dad is reading up on suspension, he will be helping me sort that out since I somehow neglected it while I was building the turbo system.....lol $$$$$
04-03-2007, 04:08 PM
#28
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RE: Twin turbo non pi track vid.
i would say 3.73 at least if you are doing a gear change with the same tires you got now, but you also have to remember that if you get big wall slicks, it will lower your effective gear ratio, bringing a 4.10 down to that of a 3.73 or there abouts.
Getting a nice set of lower control arms with a soft supsension to really get some weight transfer is gonna see those 60 fts plummet in combination with some slicks. Each tenth dropped in the 60' equates to 2 tenths on the ET, so the launch is very important.
What kind of RPM are you launching at and what rpm are you crossing the traps at, that would aid in the gear selection a whole lot. Is there any efficient way to brake boost, like heal-toe the gas/brake and ride the cluth to try and build some boost off the line?
Getting a nice set of lower control arms with a soft supsension to really get some weight transfer is gonna see those 60 fts plummet in combination with some slicks. Each tenth dropped in the 60' equates to 2 tenths on the ET, so the launch is very important.
What kind of RPM are you launching at and what rpm are you crossing the traps at, that would aid in the gear selection a whole lot. Is there any efficient way to brake boost, like heal-toe the gas/brake and ride the cluth to try and build some boost off the line?
04-03-2007, 05:59 PM
#30
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RE: Twin turbo non pi track vid.
How about not sleeping at the line?? [8D]
The best thing, especially when you're traction limited, is to jump at the last yellow light.. I know, I know, it's been said before, but that's a sure way of making sure your tires are planted by the green.. On top of that, when you get better tires, you can start launching at a much higher RPM..
What kind of ignition do you have??
JT
The best thing, especially when you're traction limited, is to jump at the last yellow light.. I know, I know, it's been said before, but that's a sure way of making sure your tires are planted by the green.. On top of that, when you get better tires, you can start launching at a much higher RPM..
What kind of ignition do you have??
JT