I pull consistent 1.6s, but a lot of people say that I should be pulling 1.5s with my set up and converter? Im doing a good burn out and it feels like its hooking good. What do you think is wrong? My best last weekend was a 1.62 and tonight was a 1.63. Help me get in the 1.5s!

 

What RPM are you launching at? With your set-up you should be in the low 1.5 area.

To bad your not an M6. You could launch at 6200 and get into the 1.4's -- nah just kidding..

Are you spinning? Have a friend watch next time. Tread left on the tires? Maybe its time to step up to some drag slick?

David

 

Tires are hooking, Im almost positive that they arent spinning. Tires are brand new practically, they only have 10 passes on them. I run 11 lbs. on them and Ive been launching at 2500 rpms. Do you think its my 2.78 1st gear in my 200-4R and 3.42s in the rear?

 

Ya oughta try stalling it higher on the launch and see if you can get a better 60 outta it... Maybe try leaving off 'idle' and flashing the crap outta the converter?

 

11 psi is a little low i think, we were running 16-17 psi in ours last night.
The gear ratios might be hurting a little too. You might want to check around the Auto Trans forum about the Yank SS series, i dont think they are really all out track performing converters, but i could be wrong, but its worth a shot to look into. Maybe you need to log some runs with ATAP to see if you can get anything figured out on the top end.

 

I played with the air pressure all night, but the 11 psi seemed to work the best for me. But then again, when I was running the higher pressures, I wasnt doing as good a burnout as I was running the lower pressure. I definately want to do 3.73s, what gears are you running in your car? I also think my 1st 2.78 gear in my tranny is hurting me. I believe the 4L60Es have a 3.06. Id like to ATAP the car, but I havent found anyone close to do it for me. I dont have the program nor a laptop, so Im stuck on the part for now. Something is definately going on in the top end.

 

What size rims in back? 15x10 or 8? 15x8 and those tires are like 27" tires.

The lower the tire psi the more drag you will have at the top end.

2.75 + 3.42 is not as hardcore as 3.06 + 3.42 but if it was me I would do this:

1) Raise tire pressure til it spins or 60ft's worse. No reason to run 11 psi if you hook the same at 15psi. And you might gain a 1mph.

2) Now I would launching at 1200 psi and flashing the convrter, and then I would up the rpms 500 at a time until the car launched better or worse.... Until you can't footstall it anymore. Yank stuff typicallly likes as much rpm as you can hold at the line.

3) Autotap and make a/f adjustments as needed.

 

15x10 Bolted RT Bogarts. I believe 1st gear is 2.78, not that it makes that much of a difference anyway. So what pressure should I run at, please specify when cold or when hot because I think it goes up as it gets hot. Ill try and change up the rpms that I launched at because I launched at 2500 all night. Thanks.

 

Dude I cut 1.51s on motor.. Yeah on a 10.5 tire compared to a 10.5w it maybe different.. but you've got stock gearing.. Its KILLING you.. Even with 3.73s Im cutting 1.51s and I have more suspension then you (I'm pretty sure). Get a gear then it may help.

 

I dont think its the rear end gears, something else is wrong. Thats why your only running 113-114mph. BTW i've got a 200r4 and 3.42s and run over a 120mph.

 

Gears and tires.

Coach

 

Well thats the only thing that I could boil it down to. Ive tried so many different combinations on the Hals, on the air pressure, and on the rpms at the line. What kind of 60 fts. are you pulling? Did you happen to change any of the gear ratios in the tranny? If you have ideas, suggestions, etc. about what could be wrong, please let me know. Thanks.


Gears is something I already have set in mind, but whats your reason behind new tires? The tires Im running are brand new and Ive probably made 10 passes on them. Theyre 26x11.5x15 ET Streets. What are you suggesting? Im almost 100% positive that Im not spinning. Thanks.

 

I'm 60fting in the low 1.6s but i only have a pye3600. Stock 200r4 gears 2.75

I'm also having a very bad stumble when i first nail the gas, over wise i would 60ft better. Something isnt right for sure, your car runs good 1/8 mile but then dies on the last half of the track. I would autotap it and maybe wire up a lockup switch just to make sure your tranny isnt slipping. BTW how do you have your TV cable hooked up?

 

Ive read many different first gear ratios. (2.74, 2.75. 2.78, etc.) I run a SS4000, but its more of a street/strip converter. So I cant expect it to be a track dominating converter. Everyone keeps recommending that I autotap it, but I dont have the program nor a laptop and I have yet to find anyone that is willing to do it for me. Id like to find someone locally who has it that wouldnt mind hooking it up to my car and seeing whats going on. Im thinking about getting a manual lockup installed, but I havent had the chance to get scheduled in at Century. But speaking of that, would I want to lock it up in 3rd if Im passing the traps at 5700 rpm? Wouldnt that bog the motor down even more which will lower the rpms? Mike welded a bracket onto the bracket that holds the cruise control and throttle cable. Then from there the cable goes to the bracket on the throttle body where it has a shaft welded to it. I cant really put it into words, so Ill go take some pics. Thanks.

 

[QUOTE=Gears is something I already have set in mind, but whats your reason behind new tires? The tires Im running are brand new and Ive probably made 10 passes on them. Theyre 26x11.5x15 ET Streets. What are you suggesting? Im almost 100% positive that Im not spinning. Thanks.[/QUOTE]

Ok with the tires you have, just get a bigger gear.

Coach

 

Are there any formulas that can tell me what exact gear I need or close to it. I hate to guess at it and then have to make more changes. I cant decide if I want to go with 3.73s or 4.10s. Will I have enough motor to pass the traps on 4.10s with 26x11.5x15s? Thanks.