What will it Run on a Drag Radial?

[allmotor_2000]

Originally Posted by f10eugene

Well, a bit disappointing but made a total 10 passes...

Best pass of the day was 11.42 @ 128mph with a 1.9 60ft

Couple of things to note here:

1. I did not use launch control, quite honestly was scared of breaking something with the drag radials. My buddy with same mods and gas PLUS jb4 on r888 was running 11.5's; he tried LC twice and both times car didn't like it and struggled to get out of the hole.

2. My car did not have traction issues...HOWEVER...when I tried to mash the pedal to the floor off the line, car hesitated and there was a noticeable delay. Thus causing me to ease (50%'ish throttle) off the line then go WOT.

3. Before on PSS I was doing 129/130 but last night my best was 128 and average was 125...wondering if it's because of the DR.

Lowering the tire pressure will drop MPH... what did you have it at? Also, which DR's were you using? I have seen 1-2 mph reduction from R888 (26psi) to MT's (18psi).

LC is useless... don't bother.

[MSIXCARBON]

Originally Posted by Lerxst M5

Were you able to do a burnout? I was not able to get the tires to spin by power braking at all. RPM's just did not want to cooperate. Traction control was off completely - car seemed to have an anti powerbrake mode. lol

I'm pretty sure you can't power brake these cars. You need a line lock then just hit the gas pedal at the edge of the waterbox to light them up.

[f10eugene]

Originally Posted by MSIXCARBON

I'm pretty sure you can't power brake these cars. You need a line lock then just hit the gas pedal at the edge of the waterbox to light them up.

Exactly what I did

[f10eugene]

Originally Posted by allmotor_2000

Lowering the tire pressure will drop MPH... what did you have it at? Also, which DR's were you using? I have seen 1-2 mph reduction from R888 (26psi) to MT's (18psi).

LC is useless... don't bother.

20psi Nito

[f10eugene]

allmotor_2000

Going to try to head out to the track this saturday again...any suggestions on how to get off the line? I was on Pure turbos IG and saw that the TPG m4 break torqued for a second before taking off...

I KNOW the car has a 10 second pass in it but I have to cut something better than a 1.9...GRRRR

[Northern X5M]

Originally Posted by f10eugene

Well, a bit disappointing but made a total 10 passes...

Best pass of the day was 11.42 @ 128mph with a 1.9 60ft

Couple of things to note here:

1. I did not use launch control, quite honestly was scared of breaking something with the drag radials. My buddy with same mods and gas PLUS jb4 on r888 was running 11.5's; he tried LC twice and both times car didn't like it and struggled to get out of the hole.

2. My car did not have traction issues...HOWEVER...when I tried to mash the pedal to the floor off the line, car hesitated and there was a noticeable delay. Thus causing me to ease (50%'ish throttle) off the line then go WOT.

3. Before on PSS I was doing 129/130 but last night my best was 128 and average was 125...wondering if it's because of the DR.

So your and my car are pretty much identical. I have HFC instead of no cats, but my tune is set up for 94 octane.
You are experiencing the same issue as I am at the line. BPM figures maybe the tune still needs some more time to adapt. Basically this is holding me back from my 10 second run. I don't think easing into the throttle will net us better 60 foot times. This tune is slightly more MPH than my other tune, but the other tune didn't have the hesitation, which netted me a slightly better 60 foot which resulted in the same ET but lower MPH. Therefore the new tune is a better roll racing tune which is probably better for everyday shenanigans.

[Northern X5M]

Originally Posted by Lerxst M5

Were you able to do a burnout? I was not able to get the tires to spin by power braking at all. RPM's just did not want to cooperate. Traction control was off completely - car seemed to have an anti powerbrake mode. lol

You can sort of power brake.

While holding the brake completely down, floor the gas pedal.
The RPMs will come up a slight bit. (You will get what was happening when you tried).
Slowly back off the brake pedal, at a certain point the car will take off.

Now you can modulate the brake pedal to minimize the forward travel. Too much brake and the throttle will cut off, not enough brake and the car will travel too much.
After some practice you can just about do a standing brake stand with just a little bit of forward creep.

[allmotor_2000]

Originally Posted by f10eugene

allmotor_2000

Going to try to head out to the track this saturday again...any suggestions on how to get off the line? I was on Pure turbos IG and saw that the TPG m4 break torqued for a second before taking off...

I KNOW the car has a 10 second pass in it but I have to cut something better than a 1.9...GRRRR

TPG car probably has line-lock or a 2-step - you can brake torque with that slightly and keep clutch engaged. If the hesitation is upon initial WOT, it won't affect 60'. If its after clutch engagement it will...

I have line lock although I didn't use it for launch.... its the tires man, I tell you.

You can see the hesitation as I wasn't going for R/T. This was a 1.61 60-foot.

Different view:

[Lerxst M4]

Originally Posted by Northern X5M

You can sort of power brake.

While holding the brake completely down, floor the gas pedal.
The RPMs will come up a slight bit. (You will get what was happening when you tried).
Slowly back off the brake pedal, at a certain point the car will take off.

Now you can modulate the brake pedal to minimize the forward travel. Too much brake and the throttle will cut off, not enough brake and the car will travel too much.
After some practice you can just about do a standing brake stand with just a little bit of forward creep.

Thanks Northern X5M...I will try that next time I go.

[Northern X5M]

Originally Posted by allmotor_2000

If the hesitation is upon initial WOT, it won't affect 60'. If its after clutch engagement it will...

Yeah, the problem is the hesitation is after the tires break the beams.