C52K3

I'm running a 305-35/18 mt et street and they hook up great. I'm making 656whp 591 wtq with novi 2000

Turbo-Geist

If you are keeping the 4.10 gears, I would recommend going to the 305/40. If you are going back to 3.42s, you might can get away with the 305/35.

Everyone has always used the 305/35 because the 40 didn't exist until this year. The other thing that keeps people away is if your car is lowered, you will probably have to remove the inner fender liners to keep it from rubbing a hole. As mentioned, mine are permanently removed. There is always a trade off with different choices. The 40 series will not be as crisp in the turns compared to a 35 series.

For me, I started to have issues around 600rw in 1st gear with the 35 series tire. My car is turbocharged so it makes more torque than a supercharged car. You may be able to get away with the 305/35 and a supercharger with 3.42 gears. Don't forget though that your Z06 trans is a little more aggressively geared. It's doable but it requires a certain amount of finesse launching in 1st gear. It also depends if all of your racing will be from a roll or a dig.

So on the street, you can launch the car and immediately go wide open throttle in 1st gear and the tires don't spin?

C52K3

I can't comment on launching but if I go wot at say 3500 4000 rpm It will bite and hook up. I'm on stock gears and mn6 trans

Water_Walker

I wonder if any issues arise from removing the inner fender liners? When would they rub, over a harsh bump?

Turbo-Geist

I've been without inner fender liners for 5 years. A 28" tall tire will rub a hole in the front part of the inner fender and possibly rub on the top part depending on how far the car has been lowered. Some people just let it clearance itself and move on. Other people remove the liners while they are still intact.

Water_Walker

Thanks for the great information. Your post has inspired me to try the 40's. Thank you again!

Turbo-Geist

Glad to hear you've made a decision. Please report back with how you like the fitment and how they end up working out for you.

Water_Walker

With these on the back, what does one run on the front? Same tire but 275/40/17?

Would want to avoid traction control issues...

winters97gt

The 295/45-17 is still a great tire IMO. I've proven it to dead hook in first gear with no track prep running 825rwhp and 775rwtq. I ran out of gear and my IAT's were skyrocketing with one meth nozzle not working or I bet I could have run 173-175. My setup for the half mile to hit 175 would be base transmission gearing(MN6) 3.42's, 900rwhp and the 295/45-17's at 18-20psi. Bump the Rev Limiter up to 7200-7300 to avoid the 4-5 shift.

I actually saw tire inflation quite a bit since my numbers aren't mathematically possible with that tire and my rev limiter. But other guys had their vboxs, etc(I believe Mullet and Todd did Ben) as well as hightechcorvette hooking their gear up to verify the data from the Texas Mile crew.


I think your car will be 180-185 at least if you can manage that torque.

slow ride

I think the way the turbos come in is the main issue in comparing the two. The blower is nice and linear, but the turbo comes in hard with the torque bulge and upsets the tire/suspension. Looks like the 295/45/17 is discontinued, but they have the r in 305/45/17.

winters97gt

I guess that's .25-.5 inches taller. Might be perfect.

winters97gt

I've got a set of brand new 295/45-17's that have been sitting for a year. Only tire I ran. Had no idea they discontinued them.

neverstop

I'll be trying the 305/45/17 ET street R at local 1/2 mile event next month with 900whp/860tq procharged and will let you know how it works. On the street they seem to have no chance of hooking up 1st/2nd gear but hook up third fine 100% WOT. I'd go through a decent amount of work to get my car to hook up wot in 2nd gear but seems like not possible without 15" conversion.

with my tiny D1sc blower power falls off pretty hard at 6100rpm so not planning on winding it out to 7200rpm even though that 5th gear shift is a serious buzz kill.

that's interesting about the tire stretch.

crazy you hooked up 1st/2nd with those though Winters at that power level. Impressive.

winters97gt

Sounds good NeverStop. I'm assuming you have a big cube motor or lower on compression for the power to fall off.

Looking forward to your results. What's your gearing in your tranny/rear?

neverstop

yeah... i did not anticipate the d1sc would fall off at 6krpm on a full tilt 427ci setup when theoretically max rpm on the d1sc should happen at 6800rpm, which is also where the cam was spec'd to peak.

built c6z06 rear end and z51 gearing rpm l5 t56

if i ever pull the tranny again i'll be going with either zr1 or custom 4th/5th gear setup

Water_Walker

I think my question got lost...

With the 305/40/18's on the back, what does one run on the front? Same tire but 275/40/17?

Would want to avoid traction control issues...

Turbo-Geist

I run a 265/40/17 in the front. I haven't noticed any issues, but I don't drive in the rain much and can easily overwhelm the TCS on dry pavement.

Water_Walker

What tire though?..meaning brand name?

Turbo-Geist

Falken FK-452

StealthFRC

I honestly hate mobile site... Always post to the wrong thread...



You should be able to unbolt the driver side turbo from the manifold. Some of the nuts are **** to get to but it does work. It defiantly can not be dropped as a assembly like the passenger side.