Input wanted to get to 9's on turbo setup.
 

I'm looking for input from other guys who've gone single digits with a 6 speed and any insight they can lend. The cars been 10.6 at 132 with a 1.55 sixty foot being my best off the 2 step. Full weight 6 speed 100% streetcar. No weight reduction so ~4000lbs with me. ~8psi of boost with the 9:1 383 and T76GTS. Stock 16" wheels with 215/60/16's in front and 295/50/16 M/T drag radials in back.

Will NOT:
Swap to an auto, even though I know the car would definitely go single digits then :)
I am also not looking to up the boost.

Will:
Remove front sway bar.
Remove some weight.
Just added a 3.5" cutout just after the downpipe and the car feels more powerful and spools much faster. Getting retuned at the end of the month.
Mess with 2 step settings. Best so far is leaving at 4k rpm's part throttle on the 2 step.

Anyone else have any other ideas or tips that helped them? I had this in the drag racing section and all the responses I got were "gut the car, up the boost, and switch to an auto". There is obviously more to drag racing than just those; like shock settings, tire pressure, launch rpm, etc. Thanks in advance.

So you don't want to go auto, dont want to up the boost, and want to take out minimal weight. Sorry bud but it's not gonna drop 6 tenths without making a sacrifice somewhere. Without more power, I doubt you're gonna get those 60 fts down enough at that kind of weight.

You ay consider posting a video of a run so the pros can analyze your car better. In the mean time here are some loose ideas that may spur conversation (or other ideas). You'd likely need a combination of a few of these to get .7 sec...

Different turbo (Why the hard psi stipulation? I'd expect that from the supercarged guys)
Different (rear) gearing
Shot of N2O
Remove air filter from turbo (for race only)
E85
Meth
Some form of flat-foot shift ignition device
Tire pressures
Tire size
Lighter wheels
Skinnies on the front
Disconnect power steering pump

After typing out all of this I can't help but think that your setup should be able to do high 9's on the right turbo w/ the right psi. There's a yellow GTO that runs either low 10's (like 10.1) or high 9's @ ~140's on 364ci turbo alone. Also a full weight street car (3800lbs+). I think he's running like 18psi on a 76mm tho, and some of his shifts almost sound like an auto.

Nothing definitive, but food for thot. I'll post the GTO vid if I can find it.

Regards,

Kurt

I definitely agree. The 60' could come down about a tenth or so but that wont get you down to a 9.

Ull spend alot more money and change ur entire setup tryin for nines, when in reality u could spend a fraction of that switchin to an auto with better results

^ this ,fast turbo cars should all be autos, i love my 6 speed but honest when i do my 5.3 build im going to switch to an auto, just easier imo

I enjoy rowing gears too much to switch to an auto. Besides, I enjoy my almost 30mpg on the highway :) I plan on dropping considerable weight, but will not gut the car. I am only leaving at 4k off the 2 step, so between messing with launch rpm and removing the front swaybar I am hoping there is a tenth in there, meaning more like .2-.3 in the 1/4 mile. Based on my 1.55 sixty foot video I have, the car is almost pulling the front tires as it sits.

Kurt,

Thanks for the input. I am also considering pulling the intake on the turbo as well to help like you mentioned as well as meth or water injection. I agree that 9's is possible, just won't be easy.

FasTimeSS,
The only money I have into changes so far is welding in the cutout and a retune. Other than a possible water/meth kit, there are no significant expenses as losing weight or pulling intake piping is free.

Again, between the cutout and intake, there is more power to be made at the same boost level.

Always open to more ideas or comments.

If you dont want to up the boost.....better off just getting a different car. :) j/k.

How do you get 4000lbs? Do you weigh about 500lbs? My car sounds like it sits just like yours, nothing has been removed, 9", even same turbo. Mine weighs 3480 and with me, helmet, and laptop in it scale said 3700lbs. If you do not weigh 500, where is this extra 300lbs you have coming from? That is 3 tenths right there.

And 8psi though a 9:1 engine and that turbo... i'd say your car runs pretty good for what it is.

Why wont you turn the boost up? 9:1 you can up it to 15 safely....that thing would rock! :D

Bob hit it on the head

X2

You are going to need to up the boost for sure, I would put the 2 step at 6000+. What kind of clutch do you have because its going to take a beating. You might get in the 9s with a M6 but your going to spend allot of time and money not to mention beating the hell out of your car trying. You also said this is a 100% street car so who cares what it runs at the track. Do you do allot of roll races with the car?

stop being a pussy, up the boost
switch to a 15" rim in the back, skinnies up front
play with your suspension a little.

Hahaha right^

clutch is a McLeod rst twin disk. As to why I care what it runs, call it curiosity or personal accomplishment combined with the fact that very few get there with a six speed with gutting the car or having a monstrous motor. The car does get it on from a roll every now and then though ;)

Thanks for the input. I was under the impression stock TA's were around 3600 lbs, plus turbo kit, plus 3.5" over axle exhaust, plus ford 9", plus big drag radials, and some suspension is heavier than stock. I agree about the car running pretty good for what it is, I actually didn't expect it to go that quick :drive:But that got me thinking on what it would take to go single digits, lol.

Maybe I missed it but, what rear gear are you running?

Your car is running well at that weight and that little of boost. Add meth and a couple pounds of boost. You may also want to try simple weight reduction like pulling out the passenger and rear seats for the track.....

A manual valve body auto is fun to drive also...

You need more power, plain and simple.

if you're doing 1.5x 60fts, then clearly traction is not a problem

Auto and mvb! keep that turbo spooled :headbang: manuals are so last year

3.50 gear in the 9". Thanks for the input. I was thinking of pulling the rear seats as well as drop some weight.

I disagree. More power is the simple solution. Anyone can turn the boost knob up. The car hooked at 4k off the 2 step to go 1.55, but when I upped it to 4.5k it blew the tires off. No weight reduction and stock sway bar still on. I would expect with weight loss and no sway bar that the car should dip into the 1.4x sixty foot.

Winner Winner chicken dinner!

If you're not power shifting that will help alot, but the T56 could go boom. I'm not good enough to power shift every gear but it seemed like each gear was worth 1mph. 28x10.5-15 stiff wall ET drags with skinnies up front and a 6k launch off the 2 step, ditch the front sway bar. My car weighs 3500 lbs and the only things I don't have is AC and the front sway bar, thats even with the 275/40-17's on all 4 corners. I do have a MWC fab 9" rear though so that helps a little with the weight.

What are you running for timing? Full timing at zero boost, and then how does it ramp into full boost? Dumping it at 4000rpms off a 2 step and only a 1.55... That thing should do better than that. My car, basically same as yours, 370, PT76GTS, 9" 3.50, 100% stock suspension, MT 275's, I launched at about 3200rpms footbraking it to 11psi and it left rather easy with a 1.41 60ft. I know mines an auto, but a 1.80 1st gear glide.