Hey Guys,
I was wondering what size tire did most of you run your best et on? 28 ET Drags , 27 QTP's ,or 26 QTP or ET Street ? I have a TH350 with a 4000-4500 TCI 8 inch converter .Right now I'm using 28's and I belive it's killing my 4.10 and my bottom end in my 93 Z. I went to the track the other day and ran a bunch of 11.6's/ 116-117 mph. Plus, do most of you run 93 octane or Cam2 (110 or 100 )? I know Cam2 is only nessecary if your car has a knock or something going on. Thanks in advance ,guys

 

I run 26 inch M/T ET streets and I cannot lean on it real hard off the line or they spin. my regular 60 foots are in the 1.7 range because of this. I know I could do some more suspension mods and get it lower and probably hook better, but I think the 28 inch would better suit me, I run 11.9s @ 115 mph.

 

I run a Turbo 400 w/ stock 2.48 first gear. 4.56 rear gear. I run a 28x9.0 slick.

Ken

 

I have a 700R4 and 3.73's. On 26" tall ET Streets I was cutting mid 1.5 sixty foot times with a 3600 stall. Because I started dipping into the 11's on a regula basis, I went up to a 28" tire and my sixty foot times rose by about a tenth... 1.62-1.64... MPH went from 108 to 109 on average, and ET's rose from 11.8's to 12.0's. Perfect for street class where 12.00 is the cutoff.

I like the taller sidewall because I can hook up on almost any surface.

 

I'm running a 26/11.50 and a 373 rear gear. Looking at your mph and et, it depends how hard you want to push the car through the 1/4 mile. With 373's I'm usually sitting on about 6000rpms through the 1/4. With a 4.10 gear in your car and your mph, I guess you should be around 6500rpm's or so with a 26" tire. As far as pump gas or race fuel goes, unless you're over say 11:1 compression, I would stay with 93 octane. No need for 110 octane with low compression. Plus, gas is high enough as it is without having to pay for race gas Just my $.02

 

What's up Mac? I run the 27 QTP's and had a 1.54 60ft last weekend. I didn't get chance to run through the 1/4 since I was at an 1/8 mile track. I'm going to rockingham this weekend so I'll keep you posted.

Randy

 

Thanks ,Carbed93Z !! I'm still going to give my 26's a shot and switch back to 93 octane . Hopefully ,I can nail some low 1.5 60ft's with them.

 

Hey Randy . Sweet 60ft ,man !! .If I could 60ft like you ,I would probably run an 11.3 or 11.2 easy. I see a pair of 27' QTP's on order for me very,very soon. Please keep me posted about this upcoming weekend.

 

26" the 28"/4.10 is like running a 26/3.73 combo, loosing all the benefit at the tree. If you need less RPM on the top end then go to 27s but hard to know b/c I dont know what RPM you want to cross at and how much slip the TC has up there.

I would try a set of 26's first and go from there. N/A you should be good with 26's.

 

I plan on it ,Shon. Hopefully , I'll be able to hit the track this weekend w/ the 26" mounted on .

 

how did it go?

 

I didn't make it out there this weekend ,Shon. I had some family things I needed to take care of first. I have to work this coming weekend ,but next weekend....... it's on !! I'll keep you posted.

 

Cool!

 

I would choose based on the overall drive ratio between 26, 27, or a 28" tire. There doesn't seem to be a huge difference in traction between them. In theory, the larger diameter will have better grip due to the taller sidweall and shape of the contact patch.

I 60' the same with a QTP 26 v. a 27" and am using the 27" to get a taller drive ratio and avoid hitting the redline. 28" seems like too tight a fit to me, though I know that many people use them.

Rich