sumpin' i learned yesterday (rt question)
 

I learned I hate LED bulbs in the tree.....

but somewhere between the last yeller and green I need to leave, not on the last yellow or as it turns green....I'm going red by a LOT...taller frt tires? 24" on there now...
more pressure in the rears? (8.5 X 26 slicks)? other ideas?

not running stock (yet) running a stickshift series this year but maybe you guys can give me some direction...

Re: sumpin' i learned yesterday (rt question)
 

Change the ratio of the clutch linkage for more travel at the pedal.

Re: sumpin' i learned yesterday (rt question)
 

Put on the tallest tires that will fit first. The longer rollout will help ET's as well as slow RT's a bit. Then adjust the clutch linkage like Mark described.

Re: sumpin' i learned yesterday (rt question)
 

I have to use 28" tires, I can't imagine getting a green light with 24". What kind of car is this that you can use 24" tires?

Re: sumpin' i learned yesterday (rt question)
 

67 American...
I don't think I can get 28" in the frt, probably 26's

I've got the freeplay completely out, helped the shifting a lot ,was having issues (stone stock used st-10 3.42 1st gear)

measured 'em again today 24.5"....
would have to trim the fenders for much taller...or raise the ride height

Re: sumpin' i learned yesterday (rt question)
 

Stock tires on my Firebird were 25.7", so I started with 26". I didn't notice it going any faster after the 28"s, just more green lights. After hearing how taller fronts show faster on time slips I decided to A-B-A test that. (I wear my junk out testing) I borrowed a set of 26" fronts. Back-to-back-to-back testing showed about nothing. I understand the therory, but calling it one hundredth of a second difference on my car (which repeats very well) would be a stretch.

Re: sumpin' i learned yesterday (rt question)
 

I agree with Mark's comment, clutch travel adjustment is the stick version of a delay box. A couple of turns seems to be about .01 on my car. Your leg obviously doesn't move nearly as fast as a finger so it makes for big changes. Definitely have to make adjustments from altitude to sea level tracks.

Also played around with tire pressure but it didn't seem to make any noticable difference in RT. I was curious so did some measuring in the shop, changed from 40 PSI all the way down to 25 and didn't measure any noticable squish in the tire that made for more rollout. Makes me wonder if this is just one of those ideas that is more mental than real when it comes to RT's.

Jim Caughlin
SS 6019

Re: sumpin' i learned yesterday (rt question)
 

Jim, I have played with front tire pressure and couldn't tell much either. Blamed that on myself not repeating well. Rear tire pressure has more effect as far as I can tell.

Re: sumpin' i learned yesterday (rt question)
 

The more air gap you have the slower your reaction times will be. When I tried a blinder it stopped the red lights.

Re: sumpin' i learned yesterday (rt question)
 

Does a blinder work well at night? Bandimere`s events often finish in the dark.