Launching Auto on ET Streets

[Bodam]

Trying to get my 60' times below 1.9, but having trouble.

3.73 gears, 2,300 stall, ET Streets 26 x 11.5 x 15

Tried launching at 2300, at idle, etc, but can't the times down.

Tried different PSI...15, 13, etc. No change

Tried long burnouts, short burnouts, no burnouts.

I honestly can't tell if I'm spinning or bogging. I get bad tunnel vision and can't tell whats going on around me when I am starting. I know that I don't have wheel hop, I would notice that, lol.

What methods do you guys use?

 

[Brezick]

I would think you are bogging a bit at the line. I would take a look at an aftermarket stall converter so you can flash or foot brake it to a higher rpm. I found my best is to foot brake just over 1k rpm just to get the suspension loaded, then go WOT on the third yellow to flash the converter.

 

[808muscle]

Best I have cut is 1.86. I am on same tires but 17's. I run 30psi anything less and major bog. I tried the 1k rpm load and from idle, both results same. I just added the alum ds, am hoping that will help. My buddy videod me and my car really squats before it takes off. I think its costing me.

 

[Bad Intention]

Get a Circle D converter and you will solve this.

 

[beefcake]

i'll be honest. if you have tunnel vision. I would think twice about drag racing.

awful scary.

i've done high speed runs busa runs many times. always took the time to build up

be safe

 

[Steedman07]

You need a real converter. But get something with a high stall. I have a 2,800-3,000 stall and its not enough. My best 60 ft. is 1.88. Now I have big n littles so well se what happens at the rental tomorrow. And yes, fott braking it to about 1,000 rpms or so works best for me. But I want to be in the 1.60 60 range..

 

[Bodam]

Yeah, the stall is a little low, but it's a prototype, so what can ya do?

Going back to the track tomorrow night to get more practice and log what I do and how I do it. We will see how I do....

 

[Steedman07]

If you are not bracket racing then dont worry about the lights. Just focus on the launch. Thats what I am going to do tomorrow at my track rental, unless there is an F-body in the other lane..buwhahah

 

[Bodam]

Yeah, the boss is bringing his lambo, so no pressure right?

 

[Sharad]

Trying to get my 60' times below 1.9, but having trouble.

3.73 gears, 2,300 stall, ET Streets 26 x 11.5 x 15

Tried launching at 2300, at idle, etc, but can't the times down.

Tried different PSI...15, 13, etc. No change

Tried long burnouts, short burnouts, no burnouts.

I honestly can't tell if I'm spinning or bogging. I get bad tunnel vision and can't tell whats going on around me when I am starting. I know that I don't have wheel hop, I would notice that, lol.

What methods do you guys use?

You need someone there to either take video or just watch and tell you what the car is doing on the hit.

I'm guessing the car could use a bigger gear and higher converter stall speed, but you haven't said much about your setup. Is the suspension all stock?

 

[Bodam]

Yes suspension is stock. Have 373 gears and a 2300 stall.

 

[Fake_Snake]

i have a 3k stall on 275/50/15 mt et streets, psi @ 15 what i do

burn out till white smoke roll out..
stage
stall up to 15-1800 rpms
when the light drops on the last one I DONT MASH THE GAS
i ease in to it and i usally cut 1.5, 1.6's

if i stall higher right now and get crazy with the gas i cut 1.8's-1.9's

 

[808muscle]

Armycook, you got a GT500 swap and a 4R70w. We gots the crappy 5r55.

Steedman, interesting you have that stall and arn't getting great 60fts either. What brand? I am stalling on getting a stall. I would have to cut my exhaust pipes since I had them all welded and take out the DS again(please not that again its finally working good). I think I am gonna use the stocker untill it goes boom. No jinx please.

 

[8306gt]

Yeah, the stall is a little low, but it's a prototype, so what can ya do?

Going back to the track tomorrow night to get more practice and log what I do and how I do it. We will see how I do....

What you can and should do is go back and talk to Chris, tell him what it's doing so he can make changes from that information. I realize you said it's a prototype, but I wouldn't have even bothered to pull the stock convertor out to put a 2300 stall in the car.

As for how to launch, I have 4.30's so I do a burnout up through 3rd gear to get my MT II street radials hot, and then at the line bring the engine to about 3500 against the convertor, when I nail the throttle it flashes to 4200 and with completely stock suspension it does high 1.5 sixty foot times.

 

[Bodam]

What you can and should do is go back and talk to Chris, tell him what it's doing so he can make changes from that information. I realize you said it's a prototype, but I wouldn't have even bothered to pull the stock convertor out to put a 2300 stall in the car.

As for how to launch, I have 4.30's so I do a burnout up through 3rd gear to get my MT II street radials hot, and then at the line bring the engine to about 3500 against the convertor, when I nail the throttle it flashes to 4200 and with completely stock suspension it does high 1.5 sixty foot times.

We didn't know what the stall speed was going to be, hense prototype. It turns out it only came out to 2,300.

I talk to him every day. I'm trying to figure out my launch techniques and not try to dump it on him and the converter.

If it doen't rain tonight, I should be able to get some runs in tonight. I am going to log the PSI, RPM etc and see what works best.

 

[Sharad]

Yes suspension is stock. Have 373 gears and a 2300 stall.

Well, you certainly have good tires on it. Have someone watch or record the pass and if the car is spinning, we'll help you get some good suspension on it... if you'd like.

 

[Bodam]

OK, track last night my best 60' was 1.89. That's a personal best, even though it still sucks.

PSI was around 15-16 and I think the launch was around 1,000 RPM.

Any lower PSI and higher RPM I was spinning. I went all the way down to 13 PSI and still got spin.

I think the first thing I will do is get a set of LCA's and see how that helps. There is such a small sweet spot for launching this car, I still can't find it. But I think it's gonna be around 15 PSI and 900 RPM.

 

[Steedman07]

What you can and should do is go back and talk to Chris, tell him what it's doing so he can make changes from that information. I realize you said it's a prototype, but I wouldn't have even bothered to pull the stock convertor out to put a 2300 stall in the car.

As for how to launch, I have 4.30's so I do a burnout up through 3rd gear to get my MT II street radials hot, and then at the line bring the engine to about 3500 against the convertor, when I nail the throttle it flashes to 4200 and with completely stock suspension it does high 1.5 sixty foot times.

I would kill for a 1.50 60 ft. That would give me a low 11 and an outside prayer at a high 10. If the math works for every 1/10th you better your 60 ft. your 1/4 improves 2/10th's..And I will run my car to 6,800 in 4th and keep the 275-50/15's like you said. if it blows, it blows..

OK, track last night my best 60' was 1.89. That's a personal best, even though it still sucks.

PSI was around 15-16 and I think the launch was around 1,000 RPM.

Any lower PSI and higher RPM I was spinning. I went all the way down to 13 PSI and still got spin.

I think the first thing I will do is get a set of LCA's and see how that helps. There is such a small sweet spot for launching this car, I still can't find it. But I think it's gonna be around 15 PSI and 900 RPM.

Thats identical to mine. I foot brake it to 1,000 or so, and then matt it and let it flash. And my 60's are still 1.85-1.89..

 

[fiveoh]

OK, track last night my best 60' was 1.89. That's a personal best, even though it still sucks.

PSI was around 15-16 and I think the launch was around 1,000 RPM.

Any lower PSI and higher RPM I was spinning. I went all the way down to 13 PSI and still got spin.

I think the first thing I will do is get a set of LCA's and see how that helps. There is such a small sweet spot for launching this car, I still can't find it. But I think it's gonna be around 15 PSI and 900 RPM.

Did you run at Sealy again or RPR? RPR generally has a lot better track prep, might help you hook more. Did the 1.89 give you a new PB?

How did you end up with a Circle D prototype? Haven't they had a finished product for a while now?

 

[Bodam]

Did you run at Sealy again or RPR? RPR generally has a lot better track prep, might help you hook more. Did the 1.89 give you a new PB?

How did you end up with a Circle D prototype? Haven't they had a finished product for a while now?

Baytown.

1.89 is a PB

Prototype is something Chris came up with to modify a "stock" converter to see if he could come up with something less expensive for folks. We didn't know what the stall speed would come out as, thats why I am trying to do all this data logging form him, to see if it's worth it to continue with this product.

I need to learn how to launch it perfectly to get a solid consistent time for him.