you can put from 235-50-16 to n50/16 up to s 515/45/16 me the n50/16 or 17 made by pro -trac from $275.00 each to 475.00 each add 100 each for mickeys an then add another 100 each for hossier ,so street race tires can get up there ,if you choose smaller on the front then you save ,just a quick search at jegs I there is probley better deal MT when they have sales about 350.00 each for desent rear meats ,when most of us are paying that much for 4 tires its a lot,i would not switch out headers because of that unless you need new ones,tire rack has sale to an got my rims an first set of 4 tires an rims falkens there for 1200.00 delivered,then I got my last set of falkens tires DTD for 300.00 to the door that was a deal

 

What. A pair of mickey thompson drag radials are around 400. Whoever you buy tires from must love making money from that mark up lol.

For example:
Mickey Thompson ET Mustang Street Radial - 275/50-15 3753R - Free Shipping

If OP can't get a set of et streets to hook they need to fix their suspension or driver mod lol.

 

no that was each at jegs up to 500.00 each for a pro trac ,I know what used to be a standard 50 in the back ,is like 350.00 325,00 sale then you move up to wider they get more $$$ ,they do have other brands that was a tire called pro trac,275..00 for the 50 ,I may go back to falken tire that is like the older 50 for like 150.00 ,my first year with the car I had 50s in the back 60s in the front again oldshcool sizeing ,the ones in the rear last 14.000 miles with like 2 burnouts ,so I desided to go back to 60 all the way around ,an get like 30 40.000 wide tires wear out a lot faster ,I may go back to that look an taller walls ,but keep the burnouts down ,guys that race spend a lot on tires ,an yes they get rich from those big tires ,the ones for the indy cars cost upwards of $1000.00 each if you shop you cvan find better prices I am sure of that jegs is not my favorite place to save money,goodyear has sales in the spring that surprise me ,an the new way of sizeing I am just catching up to myself ,I think one day the 16s will be hard to find an the norm will be 17 or bigger,a place called jet has MT tire for the back $214.00 each for standard drag radial 26X8 /15 looks like the old 50 of the day ,so if you shop they are cheaper to me its the sizeing,thats crazy ,I do discount tire direct an allways got the same year tire or year before one time ,they ship for free too,its the right time right place for either one ,but in the spring they let go with hug rebates an discounts ,that's when I buy,tire rack you can try to got my zr1 rims an 4 tires for 1200.00 to the door ,they both have deals at different times

 

260 bucks ea on summit for mt drag radial 315/35 17s.

 

how about 169.00 on ebay for ,MT street 315 35 17 .mabey the time is now to buy .a pair of nitto $368.00 pair same but drag,so goes to show wrong place tires can costy so much more ,no wonder jegs only had few parts for my build at desent price ,not there tires, found the mt as low as 225.00 drag radial ebay,when you go above the 315 they get to be a lot more money the 335,35-17 gets to be $500.00 a set ,ya I had the 275 40 17 on the back an they went just past the fender ,would imagine the 315,35 17 is a tight fit on these cars an sticks way out ? is that the limit on stock cars actually right now there are some deals on tires a set 225 55 16 for the red car 265.00 4 tires Westlake never hear of

 

I don't believe the tires are the issue here. Without a properly set up suspension, most tires are still going create wheel spin for him. You will be better off spending the money on a shorter torque arm and control arms get the traction you want. Just remember, better traction has the potential to break stuff that was fine while the tires were slipping.

 

Back to the original question, Short tube headers increase low end torque, long tube headers increase high end torque (max HP). If you are shifting over 4500 RPM your current headers are only helping your launch torque. The long tubes with help over the 4500 RPM range.

 

I know it's a wee bit off topic, but I isolated true, sage words from MK.

 

well I got 255 40 zr17 ,an realy think if I put 315 35 17 in back with drag tire ,would get better grip couse ,they talk about small tires to big tire all the time on street outlaws ,an how they hook up better big tires that is ,at the same time cardo needs to be carful get the tires hot may avoid knocking off the tires ,an ease into the throttle ,would help ,my low profile tires spin up much easyer then 315 35 would an with stock z28 ,so I think practice instead of spending this ton of money on other things ,cardo may do better .higher gears to .but yes suspenion upgrade would help ,too,practice runs if your street raceing ,the same if your on the track ,your only going to get so much out of the stock car anyway,i like the long tubes on my very low end torq in the 406 an was desiged for quickness off the line ,if I was raceing I would much rather have the 275 45 ,or 315 35 ,then the 255 40 ,smaller tires in front ,all those cars are set up like that with bigger in the rear smaller in front ,also helps keep the car on the road along with a good driver to

 

Yea out at the track there are plenty of much, much faster cars with tires same as mine. The problem is the cam and maybe the small tube headers. The short cam makes torque with only part throttle and the small dia header tubes lower the rpm of torque peak. I have a supposedly 2400rpm stall converter so really cant go smaller (well lower) there.

I can tell i need rear suspension upgrades for traction as the car sits nose low with my MT D/R's. But i believe i need a longer torque arm and one that attaches to the uni-body or maybe a trans cross member - not the trans itself. Havent looked into control arms yet but i think the stock ones can just be welded/closed up to stop the flex. Or do i need better than that? I like UMI parts for the rear sus. Dont have any wheel hop AFAIK.

As for header tube length the long tubes allow the exh pulse from the exh vlv closing to create a vac signal to the other tubes to help scavenge the other cyls. As rpm increases the exh vlv closes with shorter duration and will become out of sync with the vac pulse produced at the collector and returning to the other cyls that will no longer have their exh vlv open to scavenge their cyls. So above max torque rpm the headers no longer provide any pulse wave scavenging regardless of length - only from exh gas momentum. The shorter the header tube length the faster the exh pulse cycle at the higher the rpm to create a vac signal back to other header tubes.