I have a 2002 SS A4 with the stock 3.23 gears. Everytime I punch it my car lags a little and then takes off. Feels like my throtle is no connected to the gas pedal.

How can I improve this ???

 

make sure throttle cable doest have slack, if it does this can be adjusted, if you need pics on how to let me know

 

just out of curiousity how do you adjust the slack on a throttle cable?

 

I was playing with it and it does seem loose to me.....

Can I see some pics ??

 

there is a plastic clip you undo and you just slide the cable to tighten up the slack, be sure not to make it to tight and have the blade of the throttle body open this would make your car idle faster then desired

 

Can you give me more details about the plastic clip....
Also, My cables run to the driver side, Yours go to the passenger??

 

does yours have tc...if it doesnt it may be diffrent....the clip releases from the sides and you can slide cable to the tighness you want, then simply push the clip back into place and your done

 

Just so you know, a little of that "lag" is attributed to the fact that you have an automatic. The throttle response is not as quick or as sharp as the M6s.

Some of the lag you feel is the car downshifting sometimes when you punch it. Other times, it is just at a bad spot in the gearing (a "dead spot"). I think the best thing that you could do to correct this is a stall. They take away all dead spots. Whenever you put it to the floor, the throttle response is there and your RPMs jump to the desired stall speed.

 

Its your automatic trans shifitng into overdrive to make it easy on the motor, find where your gears shift at slow acceleration,and then you can shift your auto, when you floor it from a 40 roll,with the car in OD,the trans has to shift all the way down,and then go,its the downshifting that takes time....so usually a 35roll in 2nd gear is like 3k fro me,and the throttle response is instant, go drive and figure out your trans...nothing you can do about the downshift, go buy an M6 i guess....but yeah, a stall would definitely help...my buddy has a 3800 stall in his transam lolol...thats like, huge....he said its a great investment

 

i deff would get a stall!!!! its the "number 1" mod for auto's and i still dont have one
:-(

and hopefully that cable is loose and fixes your problem once you tighten it up

 

Check your TB. That looks like a billet TB and not a stock one?

Correct me if I'm wrong. Make sure you have a little tension on the throttle cable, but not enough to open the blade at idle.

 

Port your shyt!

 

THAT throttle body is on presto's car. Not ~ever~'s. And yes it is a billet judging by it's outward appearance.

 

yeah wasting 360 bucks on a bbk was my first noob mistake.....i should have ported stocker.. i still have it so i might

 

Lol! Ported Stocker > 80mm BBK

 

Anyone ever done/seen ported LT1 TB?? Cause verytime i see a ported stock TB...its the single port kind....LT1 is the dual port kind

 

Search mate!

 

Liek i said....i have, and ive only ever seen them for the LS1 not LT1....

 

Does porting the TB affect the response ???

 

There's two sides too this question and also two answer, but both are very different and address different areas.

When you say throttle response are you really meaning how the engine responds to throttle variations, or are you just generally mean that the car takes a moomnent to react and downshift via kick down?

Single large TB's are reknown for not being very responsive to small throttle inputs and variations. So the LS1 is not going to provide the crispist throttle reposnse, but it should be quite good.

To check it's not the cable or an issue with the TB put your shifter into 2nd when not moving. As your car is a 2002 model this will lock the tranny in 2nd gear and not use 1st.

Drive a long and bring the revs upto around 3000rpm. Now just stab the thrttle lightly or hard and see how it responds. If there's an issue it be evident. Else it should pickup almost immediatley. It should NOT kick down to 1st. Also remember as it's locked in 2nd it won't shift into 3rd so don't stay on the throttle for too long.

How ever I guess you are probably meaning it feels sluggish due to kick down. And often low rpms due to gearing. A stall (torque converter) will help. I'd reccomend you speak to Fuddle or Yank. I'd guess a 3500rpm would be a sensible starting place.

Chaning the final drive gears would help also, 3.42 or if 1/4 mile is more your thing then 3.73's.

Other things to consider:

Leaving the tranny in OD/4th isn't good if you plan WOT kick downs, espcially down to 1st. It is damaging to the tranny and it will take longer to react than going from D/3rd to 1st. So if you are driving spiritly leave the tranny in D/3rd.

Traction Control, this may be kicking in slightly at lower speeds, often it will bring the Low Trac light up on the dash but not always. May be try switching it off.

Also you have a few mods so torque management may be an issue, this is where the PCM limitd the engine output when the tranny shifts, so it will feel sluggish. This will only happen on WOT shifts/kickdown and is pretty noticable. This can be tuned out.

EFI Live and HP Tuners also allow a lot of control over the gearbox and the part throttle kick down points, it may be that recalibrating it to suit your driving style may be in order.

As for the engine it's self, well improvements to the induction/exhaust are always good as is a good set of cylinder heads with a cam matched for your requirements.