what brand & size slicks

[cobra 07]

I'am trying to figure out what size & brand slick to run --I have 675 rwhp and been running 18" MT & Nitto 05's 305 & 315 -35 - 18 DR's and can't get a decent 60 ft

I'am thinking about a 27 x 10.5-15 or 28 x 11.5 - 15

the car has 3.73 gears. ---

I need some advice -- what are you running ???????????

Thanks for the help Chuck

[biglou]

Chuck, I have the same problem. First you need a decent drag pack setup, I'm running a Steeda combo but have yet bought wheels/tires. If you area a diehard drag racer or looking for a decent short time, 15's are the way to go. Look at all the pro Cobra Jets, you won't find any low profile show bling on them. As for tire size I'm sure someone with experience will help from this forum. I'm thinking of a dual purpose setup like a set of 315-40-18 Nitto NT-05R's on a widened 11'' wheel. These will look decent, handle, and hook.

[msb64]

Running pretty much the same power on mine, and the best I could get with the factory exhaust and tires with varied launches was a 12.05 @ 123.69 mph.

Couldn't put it to the floor until the top of 2nd gear, which is really hard to do with cars launching hard in the lane beside you.

Did some checking into it myself, and because I only want to run them on the track, I decided on a pair of M&H 325/50/15s on 15x10 Racestar wheels.

Keep in mind that if you do go that route, you will need to run swaybar relocation brackets and trim the bottom off of your factory rear axle mounted bracket.

They should make a huge difference, I won't actually know how much until my local track gets under way.

I also did the bumpstop relocation and bumpstop bracket removal in case I decide on wider street tires down the road.

Always nice to have extra clearance back there.

[cobra 07]

Chuck, I have the same problem. First you need a decent drag pack setup, I'm running a Steeda combo but have yet bought wheels/tires. If you area a diehard drag racer or looking for a decent short time, 15's are the way to go. Look at all the pro Cobra Jets, you won't find any low profile show bling on them. As for tire size I'm sure someone with experience will help from this forum. I'm thinking of a dual purpose setup like a set of 315-40-18 Nitto NT-05R's on a widened 11'' wheel. These will look decent, handle, and hook.

 

 

Hi there

that is the same tire I have been running and have trouble hooking up in 1st gear and tryed launching from 1200 to 2500 r's. once I did a WOT shift into 4th and it went sideways with me - I didn't call that fun like the NASCAR drivers do.

[cobra 07]

Running pretty much the same power on mine, and the best I could get with the factory exhaust and tires with varied launches was a 12.05 @ 123.69 mph.

Couldn't put it to the floor until the top of 2nd gear, which is really hard to do with cars launching hard in the lane beside you.

Did some checking into it myself, and because I only want to run them on the track, I decided on a pair of M&H 325/50/15s on 15x10 Racestar wheels.

Keep in mind that if you do go that route, you will need to run swaybar relocation brackets and trim the bottom off of your factory rear axle mounted bracket.

They should make a huge difference, I won't actually know how much until my local track gets under way.

I also did the bumpstop relocation and bumpstop bracket removal in case I decide on wider street tires down the road.

Always nice to have extra clearance back there.

 

 

Thanks

I'am trying to figure out which tire to run so I can cross the line at 6k in 4th gear with 3.73's and if I can get my 60ft down to 1.5 / 1.6 that will get me into the 10's.

I did already did the relocation brackets O the fun and games we have with these beautiful cars. there is a chevy I play against that runs in high 10's and IF my RT is good I still get to the end 1sr running in the low 11's and he got over 25g's just in his motor and running a built-up auto trans I do get to him about 2 out of 5 runs.

Chuck

[msb64]

With that kind of rwhp, you should easily be able to dip into the 10s with a good launch.

What kind of rpm are you typically turning now going through the traps?

Has to be someone out there running a similar combination to yours that can supply some real world numbers.

I still like the idea of a good drag radial myself though, and was planning on dealing with the overall gear ratio later on if needed.

I would be happy to just sneak into the 10s without having to beat on the car.

After all, its just a street car

[cobra 07]

With that kind of rwhp, you should easily be able to dip into the 10s with a good launch.

 

appx 675 rwhp - it will be going on a dyno in a couple weeks - a good launch is my problem now. to much slippage in 1st & 2nd with

DR's

 

What kind of rpm are you typically turning now going through the traps?

 

6 to 6100

 

Has to be someone out there running a similar combination to yours that can supply some real world numbers.

I still like the idea of a good drag radial myself though, and was planning on dealing with the overall gear ratio later on if needed

 

I need to get into the 10's to beat that chevy consistently - then I will go back to DR's to be easier on the car and still say I got a 10 sec GT500

.

I would be happy to just sneak into the 10s without having to beat on the car.

 

After all, its just a street car

 

That is made to gettie up and go

 

 

[msb64]

Didn't read your original post right, saw the Nitto part and for some reason just assumed you were running them on the back.

It looks like you are running MTs back there, but on 18" wheels.

For myself, I am hoping the bigger side walls on the 15" M&Hs will flex enough to keep the car from shocking the tires loose at launch.

The slicks will be the way to go though as long as tire growth is not a huge factor, guys I know running them with big hp/cube engines are using Goodyears.

I am still running the factory 3.31s, but depending on how things go, might just go for a complete axle assembly with the 3.73s or 4.10s already installed.

I've got the upper control arms and bracket, as well as the lower control arms already covered, I am assuming you have done that as well.

Also looking into lightening the front end at this time on mine, I would like to knock 100 lbs or so off of the front end.

This sway bar delete bracket can help knock off up to 26 lbs from the front end by itself, if you are willing to drop the front sway bar for your track runs.

http://www.shelbystore.com/product-p/z25-s5ma-5025-a.htm

Looks like it might be worth a try, depending on how much track prep work you are willing to take on, costwise it is a good bang for the buck mod.

[NMAv]

MSB64,

 

Where did you go for your M&H and Racestars?

 

Running pretty much the same power on mine, and the best I could get with the factory exhaust and tires with varied launches was a 12.05 @ 123.69 mph.

Couldn't put it to the floor until the top of 2nd gear, which is really hard to do with cars launching hard in the lane beside you.

Did some checking into it myself, and because I only want to run them on the track, I decided on a pair of M&H 325/50/15s on 15x10 Racestar wheels.

Keep in mind that if you do go that route, you will need to run swaybar relocation brackets and trim the bottom off of your factory rear axle mounted bracket.

They should make a huge difference, I won't actually know how much until my local track gets under way.

I also did the bumpstop relocation and bumpstop bracket removal in case I decide on wider street tires down the road.

Always nice to have extra clearance back there.

 

[msb64]

Sorry NMav about the late reply, I forgot to check back on this thread.

I got the tires and wheels from Justin @ VMP, the tires were brand new and he gave me a good deal on a set of used Racestars for the back.

Huge difference with those on, although I was surprised that I still have to soft launch the car to keep the tires from spinning too much.

I worked it down to an 11:37 and then they promptly issued me a "one and only" warning to slow down (no roll bar), so I couldn't work on getting it down any further.

Plenty left to go though, 60 foot was still only 1.68, launches could have been a little harder, and I was only running 94 octane pump gas.

I am still running the stock 3.31 gears, and with the 28" tall rear tires, I made about 3 passes going through the traps still in the top of 3rd gear around 6300 rpm or so.

A nice set of 3.73 or 4.10s would have definitely helped to get that heavy car quicker off the line, and probably help to reduce tire spin.

[rsfdiver]

Do a better burnout

[msb64]

You're only about 15 and a half months late on your recommendation.

Is this one good enough

I got in 60 passes last year, and the M&Hs were down to the wear indicators.

 

I did find out why I was having launch issues though.

On a conservative Powerdyne Mustang dyno my max torque is 645 lbs ft at only 3500 rpm.

My best ETs where from launching down around 2500 rpm.

Something like the launch control and some trial and error would have helped to pick the optimum launch rpm.

[gpsn]

I have 2014 Shelby. can use 18 in wheel, but they don't make a slick in that size. So have to go to a DR. --would like to know which DR is closest to a slick for launching at drag strip.

[msb64]

I used M&Hs on mine, but MT and Nitto also make good drag radials.

Drag radials are not as good as slicks for all out performance, but at least some of them can be legally used on the street.

Some cars can get really good results with drag radials, but they usually have fairly modified suspensions and are more than likely dedicated strip cars.

With your launch control and hp level (assuming stock) and a good drag radial, you should be able to get your car down somewhere into the mid 11s at around 120mph.

The shorter sidewall on the 18s will require you to choose a tire that is fairly close in width to the rim you use.

Make sure that you select a tire that safely fits your rim, the manufacturers will specify what width rim each tire requires.