Forced Induction - Boosted 6 speed 60ft's

just wanted to see what other M6 guys are doing for their 60' times.Please state if youre using a 2 step,what clutch,and what size tires and suspension.

Back when my car had 27x11.5 15 Hoosier QTP's, QA1 shocks, spohn torque arm and mcleod twin disc it pulled 1.49-1.51 60ft's off of a 4,400 2-step.

Now with 275-40-17 MT et street radials, stock suspension (bilstein level 2), spohn torque arm and mcleod twin disc it pulls 1.54-1.60 60ft's slipping the clutch out at 5k+.

I am interested in this also.

i three llololololzzzzzzzzzzzzzzz

most of the time i was cutting high 1.7's on street tires and high 1.6's on qtp's, but didt manage a couple 1.5's taking it up to the shiftlight and doing a quick slip

with the two step it would cut 1.7's or break something..

Intim8 those times ur cutting now on the et streets is that on a 2 step?

MM were u cutting those 1.7's off the 2 step?what size and kind of street tires?

The 1.54-1.60 60ft's on the ET street radials is with no 2-step, just slipping out the clutch at 5k+rpms.

do you have any tips for us without a 2 step specially with those with minimal suspension or a stock rearend on how to launch?

ttt for others too

Well, it's a real balancing act between the clutch and the gas. You want enough rpm's to be able to come out under power. You also want to be holding those rpm's on the line with the clutch pedal up high enough to where it's nearly making the car creep forward.

From that point, when I launch, I simultaneously feed in the gas and clutch. The key is to do it very quickly, but very smoothly. When it's right it feels like you launched the car with a nice torque converter and not a clutch. Whack the accelerator to the floor or let the clutch pop up and you've either bogged it or the tires are history. I pivot my feet on my heels for both the clutch and gas when slipping it out.

Tires are also very important. The MT street radials really impress me. I use the same technique when I'm running my car on the Goodyear GSD3's but it's still a second slower because their is so much less traction (10.8 on the GSD3's and 9.8 on the MT's).

Also, I would never do it with a single disc clutch and if you're launching this aggressively with a stock rearend, have a tow truck on standby.

i was gettin low 1.6's back when my car only went 12's,......with et streets.

lmao....ill be launching with a spec 5 and a 285/35/18 nitto 555R ill basically be happy if i could get a sub 2.0 60'

[QUOTE=INTMD8]
Tires are also very important. The MT street radials really impress me. QUOTE]

How many pounds of air do you run in your MT streets?

Well, it's a real balancing act between the clutch and the gas. You want enough rpm's to be able to come out under power. You also want to be holding those rpm's on the line with the clutch pedal up high enough to where it's nearly making the car creep forward..


i agree this will work....but only a hand full of passes.......if you want your clutch to last.......put a 2-step in the car.......a 2-step is no big deal to install and is way better of the car, not to mention it makes the car way more consistent and you can actually leave with boost, so your 60 foot's will be way better.

i agree this will work....but only a hand full of passes.......if you want your clutch to last.......put a 2-step in the car.......a 2-step is no big deal to install and is way better of the car, not to mention it makes the car way more consistent and you can actually leave with boost, so your 60 foot's will be way better.


Depends on the tire. My car went nowhere trying to launch it with the 2-step on radials.

fletchls1- 20-22psi in the tires

ya...... some drag radials suck at the track, but are great on the street. with the 2-step we all need real drag tires

Ive ran mine on some Nitto DRs with no 2step and never got a sub 2.0 sixty.I think I coulda if I ran it more than a few times.But I cheated and went TH400 :bang:

the only negative thing about a 2 step is it shortens the life of the turbo(s) and if you have a nice turbo thats alot more than the price of a new clutch,but i dunno how much shorter the life for the turbo really is.

My 60' times. They suck :lol: 2.40 on MT Drag Radials (16") set to 18PSI with a 3000RPM launch feathering the clutch. Clutch is a Textralia and it likes to just grab, which add in boost = tire smoke. Actually do better on 18" Kumho ECTA's. 60' times for those are around 2.1. The rear suspension is all UMI stuff and it is set right. Car just won't stay on the pavement in 1st gear :(

and nobody currently makes a 2 step besides synergy?i wish i could find a schemaic on the circuit for a 2 step cause i have access to making chips and circuits and such.has anyone heard about the new EFI Live having a function to add a 2 step using the stock computer?

Ive done 1.8x on 245/50x15 Nittos, and a few 1.7x on 255/50x16 DR's

I wouldnt say they were particularly hard launches though. Im still exploring the grip available with the MT DR's, so I fully hope to see those times drop a fair bit this year with a hard launch.
Might be late april or so before I get to a proper drag strip though.

Most Ive tried is about 4500rpm, modulating the throttle, and with a little bit of clutch slip. Tex OZ700.
Best run was 1.73 60ft.....missed 4th gear tho. Best ET was with a 1.758 60ft. MTDR's at about 15psi hot.

Seeing as its gripped everytime, I know I can try a lot harder than that.

my best 60ft so far is 2.2 with toyo t1r's and clutchmasters clutch

i was playing around with a lot of different launch rpm's that night so i really dont know where exactly i was for that one.

i wanna give it another try when i get a twin disc..... should be a lot better with wrapped exhaust and a good cam that doesnt bleed much boost

I was expecting to see much better times in this thread. I thought I was the only one w/ horrible 60' times LOL. I still attribute my 2.0 & 2.1 60's to lack of seat time though. 2 or 3 times I've cut 1.7s, but usually I'm 2.0-2.1 on 255/50/16 MT DR's w/ ~12psi, Spec 5, eibach springs, Bilsteins, stk TQ arm, Spohn LCA's & relos, no 2 step. I would like to use a 2 step for consistency, still slip the clutch, and switch to 315/35/17 MT DR's if & when they come out, or BFG DR's same size if they don't, and then get a bunch of practice.

I was expecting to see much better times in this thread. I thought I was the only one w/ horrible 60' times LOL.



i agree.....1.8-2.2 60 foots can be achived on street tire...while just walking out of the hole

i agree.....1.8-2.2 60 foots can be achived on street tire...while just walking out of the hole

2.0+ is easy on pretty much any decent tyre IMO...

Going sub 2.0 is much harder ( I wouldnt class a MTDR etc as a street tyre BTW )
But then street tyre means very different things here in the UK. I class the MTDR's as race tyres.
I know I was never able to go sub 2.0 on a regular street tyre.

What sort of 60fts are you achieving then otherwhitemeat, and using what tyres ?

Stevieturbo..........when i said street tire i meant factory tires like goodyear eagle gt's

with mtdr i was getting 1.6's........with real street tires 1.8-2.2's. this was long ago when the car was alot slower.

Ive seen a new Merc SL500 or something like that go sub 2.0 on road tyres, but that was an automatic.

Going sub 2.0 with normal tyres is pretty hard on a manual car !! Ive never seen a big heavy car do it.

with mtdr i was getting 1.6's........with real street tires 1.8-2.2's. this was long ago when the car was alot slower.

Any details of the car ? I assume it was manual ?

Well, seven years ago, it had heads, cam, and related bolt-ons. Yes, it is a 6-speed and I was able to get it movin' pretty decent off of the line. I also disconnected the front sway bar as well to help keep some load on the tires.

1.8 on steet tires,1.6 on nittos .That is on a 16 inch rim with stock clutch .

you guys running street tires....what air pressure are you running at the track? do you air them down?

i was interested mainly in street tires/drag radials in larger diameters(17/18) to see what others are doing.i had a friend show me how to leave in boost using all 3 pedals at the same time but its horrible for a clutch.lol.

stevieturbo how do you launch?

I turn 1.87 60's with MT drags leaving on no boost. Still trying to figure it out.

stevieturbo how do you launch?

As I said....hardest Ive launced is circa 4500rpm, modulating the throttle, and letting the clutch out fairly slow ( perhaps over 1-1.5secs )

Most runs have been at lower rpm's though..

Mostly this has been for fear of smoking the tyres, but as I said, Im still exploring the grip of the DR's But when I get such little track time, I have to play safe and launch what I know will be consistent. ( plus concerns about the stock 27T output shaft )

Best I could muster on a 6-speed with BFG dragfs radials was 1.79

Also a firend of INTMD8's and I was running a clutch on a launch and the thing exploded and cut through one of the pedals with schrapnell. If you're going to launch at high RPM's I would definitely consider a REAL scatter shield. Losing a foot could put a quick stop to your 6-speed fun.

What make of clutch where you using, and what sort of rpm's ?

ditto what clutch and what rpm...also anyone know where to get a bell housing sheild for a t56?ive got the tranny blanket but that wont stop anything if the clutch explodes.

Cant you get Kevlar blankets for the bellhousing ?

There was a post ages ago on LS1Tech showing fitment of a full SFI bellhousing. Seems like a lot of work, although the guy did have to do some trimming to make it fit....which may have affected its legality.

speed inc sells both a sfi bell housing and a sfi blanket

McLeod makes a SFI approved bellhousing, is a slightly custom install.

ive got the RCI tranny blanket that speed inc sells but its not for the bellhousing.where could u get a kevlar blanket for the bellhousing.

I actually managed to pull a 1.9 on ET street radials while dropping the clutch under 1800 rpm.

I actually managed to pull a 1.9 on ET street radials while dropping the clutch under 1800 rpm.

did the same but at about 2k

My best to date is a 1.8 on BFG's, 16lbs of tire pressure. I think I can cut some better ones if I get the tires hotter though.

My best 60' as a 6spd car was 1.95 on ET streets. After changing to a TH400 my best 60' is a 1.57... neener neener neener.

My best 60' as a 6spd car was 1.95 on ET streets. After changing to a TH400 my best 60' is a 1.57... neener neener neener.

awesome, are we in the 5th grade..... i love it ha ha

My best 1.46 with ET Street's... QA1's ...No front sway bar...Spec III

My best 1.46 with ET Street's... QA1's ...No front sway bar...Spec III

WOW Zombie get owned lol jk

WOW Zombie get owned lol jk

I have BMR boxed LCA's, an airbag in the right rear spring. The rest of the suspension is factory stock (including the tq arm) with 80k miles on it. Did I mention the 2.75 rear gear that I run too. I don't run skinnies either, stock 17x9 SS wheels.

:P

I'm hoping with some susp work and switching to a 26x10.5x15 tire (using 26x11.5x16 now) I can get in the 1.4x range. What I have now doesn't seem to work too bad though.

P.S. I can't launch a 6spd car to save my life, I flat out suck at it. It was easier to mod the car than my driving (3 years of launching 6spd cars and I was still mr. 2.0 60' lol )

What make of clutch where you using, and what sort of rpm's ?

I was using the McLeod Twin Disk. RPM's were about 4000 and I slipped but almost dumped the clutch. The track was dead hooking with VHT. The BFG's really hooked well with low tire pressure. I wish I could remember the pressure but I was playing with them all day. The McLeod twin never gave up the ghost. I'm looking at the slip and with the 117MPH I think I may have been spraying the car with a 125 dry shot. I had a 12 bolt in there at the time.

Best 60' on a 325/50 MT DR was a 1.67 with 14psi pre-burnout coming out at 4800. Anything above that wasn't happening.

First and only time out on the 28x13.5 Hoosier QTP's so far was 1.70 with a bog. 13psi cold coming out at 5400. Working through a rich condition after the initial hit. Had a much better run later on (added timing) but missed a shift and screwed the run. I was so angry I never picked up my slip :bang:. Broke a u-joint shortly after. I've been kicking myself everday until I get back to the track.


ditto what clutch and what rpm...also anyone know where to get a bell housing sheild for a t56?ive got the tranny blanket but that wont stop anything if the clutch explodes.

http://thunderracing.com/catalog/summaries/s605_large.jpg

http://thunderracing.com/catalog/?action=vshop&vid=3&pcid=18


Install threads:

http://www.ls1tech.com/forums/showthread.php?t=258875
http://fastls1.com/forums/showthread.php?t=10218
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Zombie i was just kidding. You are doing better than me, i cant even drive. lol
still 15 and i dont even own a boosted 6 speed let alone even a 6 speed car. so props to yah all!

ssmoking01...damn thats a tire(325/50)

ttt....anyone know where to get a kevlar blanket for the bell housing id rather not take off the tranny to get 1 of those bell housings plus a blankets gotta be cheaper than $450

1.59 with 27x11.5 Hoosier QTP dropping clutch. The rest is in my sig.

now heres my next question....how much did tubular LCA's/panhard bar/Torque Arm help your guys 60'?

I don't have any before and after info on that sorry.