CanadianEh!

iTrader: (4)

Just installed BMR Extreme Drag Bar and 60 ft. is worse! I know I likely just need to tweak something else to make it all work together. I have full suspension mods as per signature, 3.73 gear and 28 X 15 M/T Drag Slick in a 3800 llb. car(with me in it). First link I tried increasing rear QA1(single adjustable 18 way) from 10 to 12 clicks with single adjustable fronts set at 1 - as you can see - bit and then unloaded veering off to the right. That was on full 300 shot, no delay or ramp - approx. 720 rwhp. Ran a 10.87 as I had to get out and back in - 1.67 - 60 ft. Second link set rear shocks back to 10 clicks and Progressive Ramp to .3 at 65% start. Ran 10.20 at 136 with 1.57 - 60 ft. Prior to Extreme Drag Bar was running consistent low 1.50 - 60 ft. with best of 1.50.

Appreciate any advice as to adjustments needed!

BMR Tech2

iTrader: (5)

Before the drag bar, was the car twisting bad on the launch and only lifting the left front? If so, you will have to get more aggressive with your suspension settings since now your suspension is lifting the weight of the whole front equally instead of just one side. What position are your lower control arms in? What kind of torque arm setup do you have?

CanadianEh!

iTrader: (4)

BMR Lower Control Arms and relocation brackets are set-up as per photo. Torque Arm is adjustable Sphon unit set to (-2) degrees with remote mount. You are correct that prior to Extreme Drag Bar car twisted and pulled the left front tire slightly off the ground. After bar install, and setting the rear shock to 12 clicks it seemed to hit hard but immediately sent the car hard to the right. After setting rears back to 10 clicks it felt like it launched close to pre-bar but slightly lower 60 fts.

Majestic9C1

iTrader: (19)

I'd have the nitrous on half second bursts of 100 shot..

100 shot out of the hole

1/2 second later with a 200 shot and 1/2 second later have the full 300 shot

CanadianEh!

iTrader: (4)

Thanks but I'm looking for solutions to allow the car to launch hard to take advantage of the full 300 shot and possibly a 325-350 shot. I know it's possible because there are cars doing it! I appreciate your suggestion though!

Majestic9C1

iTrader: (19)

what about putting the control arm in the lowest hole on the bracket??

CanadianEh!

iTrader: (4)

That's definitely one of the things I was going to try. Also, need to adjust Extreme Drag Bar as car pulling hard to the right. Again, thanks for the suggestion!

BMR Tech2

iTrader: (5)

Yes, try the arms in the lower hole to start with. Also when you installed the dragbar, did you put any preload on one side?

CanadianEh!

iTrader: (4)

Will do! Bar was installed neutral. Car pulled to the right so added some pre-load to passenger side. Will add more pre-load when move LCAs to lower holes.

BMR Tech2

iTrader: (5)

I would keep the preload where you are now and see how it reacts before adding more. If the car still pulls or sinks on the right rear, then I would add some more in. Getting the LCA's in the lower hole will help put more pressure on the axle and put more anti-squat in the rear so it should not have issues with it pulling over to the passenger side any more than it does now. But it will be kind of trial and error on that part. Keep us updated with how it does

CanadianEh!

iTrader: (4)

Adjusted the LCA down to the bottom hole which had them angling up towards the body - looking from the rear of the car. This made things worse! Started running 1.7s blowing the tires off! Track is not great but same track I was previously running low to mid 1.50s on prior to extreme drag bar. The only thing that improved the 60s with LCA in bottom hole was reducing tire pressure from 13 llbs to 10.5 llbs which got me into mid 1.60s. Kind of frustrating. I'm going back to the middle hole to see how that will work with lower tire pressure. Not sure if the car being lowered 1 inch in the rear is impacting things - stock springs cut 1 inch. I will also install Drag Rims\Tires, measure angle of LCA and Torque Arm in both the bottom hole and middle hole of the re-location bracket and post up results for comments.

CanadianEh!

iTrader: (4)

Got the car up on the hoist - LCA were 2 degrees up towards the body. Putting LCA in the middle hole made no sense as we had a 1 degree angle up towards the rear when we tried that. The car was lowered I and 1/2 inch and has since settled another inch. What we observed was even with the most extreme mounting holes the Drag Bar ended up pointing up at quite an extreme angle to the body mounting plate. My mechanic fabbed some heavy-duty extensions where the Drag Bar attaches to the axle which allowed a more parallel angle to the mounting points on the body. Also got a fresh set of M/T Drag Slicks tires just to confuse the situation. Anyway, those changes combined with lowering my tire pressure from 13 llbs. to 11-12 llbs. was definitely a move in the right direction! First 60 ft in the 1.40s with 1.48 and 1.49 on an un-prepped track. Very consistent all night and hooked really strong. Now I can work on shock setting and tire pressure to see if I can improve. I will likely go back to a stock spring in the rear so we don't need the extensions. Thanks for all the input everyone!

Majestic9C1

iTrader: (19)

what about swapping the rear springs to OEM V6 springs?