2017 Mustang GT Roushcharged: Cant put power to the ground! Help!

Hello everyone!

I have a 2017 Roush Phase 2 Supercharged GT Lund tuned. I have a non-pp model and everything is basically stock with my vehicle except the supercharger and exhaust. I am having a hard time hooking 1st and 2nd gear. Don't get me wrong, it is an absolute BEAST on 60 rolls but besides that... I'm in trouble.

Now my tires are:
Rear: 275/35R20 Mickey Thompson Street Comp
Front: 255/35R20 Mickey Thompson Street Comp

I have a stock suspension except for Eibach sports line spring set. I am thinking of beefing up my suspension and possible getting wider and better tires? I am reaching out to the community to get some suggestions on which suspension package to purchase to help with my situation. I am thinking of purchasing ford performance track pack suspension + steedas "stop the hop" kit + 295 Square setup. Any thoughts?

You need wider tires. I'm procharged I have 275 in the front 315 in the rear. I also have bmr cradle lock out and bmr vertical links. I have no wheel hop car pulls good

I would get drag radials. My '05 lays down 597 rwhp and I use Nitto NT05R rubber in 285 width. Pretty good grip with those.

You need at least a 295-305 sticky tire aired down to 28-30 on a 10-11" rim (smaller diameter the better, 20s are a losing proposition). For making the most of them, BMR CB005 lockout kit and BMR BK081 or BK055 RLCA bearings to stop wheel hop. Diff bushing inserts will also help get more power to the wheels (but don't stop hop), but do come with some driveline noise. Dampers make a huge difference in grip on launch too.

Kelly [MENTION=9985]BMR Tech[/MENTION] develops the products and drag and road races his own cars, both lightly modified street car on street tires, as well as an all-out strip car he's currently adding a lot more power to. Give him a call

stang305 said:

You need wider tires. I'm procharged I have 275 in the front 315 in the rear. I also have bmr cradle lock out and bmr vertical links. I have no wheel hop car pulls good

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What he said! /\

1. I had Mickey Thompson Street Comps, and I was not very impressed with them.

2. You need a little more meat in the back. 305 min.

3. BMR lockout kit is one of the biggest one mod improvements.

There are multiple causes for lack of traction.

1. Tires type - You need a tire with a softer compound. Since you are on the street I suggest the M/T ET S/S. They are my daily driver and drag strip tire. They will last about 12K miles and 50-60 burn outs at the track.

2. Wheel/tire diameter - The larger the diameter the shorter the side wall. The shorter the side wall the less rubber material to absorb shock. If you are willing, I suggest moving down to a 19" wheel/tire.

3. Suspension - From what I have read and heard from others, the BMR Cradle Lockout kit and vertical links help with straight line traction and minimize wheel hop.

4. Tire pressure - Obvious but the higher the TP the "harder" the tire is and less forgiving to shock. I am not sure about 20" tires but for 19" ~30psi is my recommended setting.

5. Tire width - While this plays a part it is not as influential as the other points mentioned above. Going from 235 to a 335 will make a noticeable difference but not so much 275 to 305. The Outlaw 8.5 cars 4.80's in the 1/8th on a 235 drag radial.

I hope this input for all of us helps you.

Jerome

[MENTION=25806]SteedaTech[/MENTION] can help you with IRS modifications. I suggest you call him.

Also, MT Street Comps (or Cooper RS3-S, same thing effectively) tires are not a tire I'd put on a boosted vehicle. They were fine for the first 50% of their life on my NA car, but after that 50% life mark, they got terrible real fast in terms of grip and required getting HOT before they had the same grip as when they were new. I don't know anyone that's liked them on a boosted car who gave it the beans ever. Spend the money on Conti, Michelin, or similar street tires.

You will probably want to upgrade your clutch as well.

Bsingh897 said:

Hello everyone!

I have a 2017 Roush Phase 2 Supercharged GT Lund tuned. I have a non-pp model and everything is basically stock with my vehicle except the supercharger and exhaust. I am having a hard time hooking 1st and 2nd gear. Don't get me wrong, it is an absolute BEAST on 60 rolls but besides that... I'm in trouble.

Now my tires are:
Rear: 275/35R20 Mickey Thompson Street Comp
Front: 255/35R20 Mickey Thompson Street Comp

I have a stock suspension except for Eibach sports line spring set. I am thinking of beefing up my suspension and possible getting wider and better tires? I am reaching out to the community to get some suggestions on which suspension package to purchase to help with my situation. I am thinking of purchasing ford performance track pack suspension + steedas "stop the hop" kit + 295 Square setup. Any thoughts?

Click to expand...

I had the street comps on an almost similar set up on my '11. 600 rwhp. They are not very sticky. If you want sticky, try the Michelin A/S 3+ in the same size. They are a/s but are much better than the MT street comp tires which are just not very good tires. But, best are drag radials. I used those in the summer and they were good. I had the nittos but MTs and others are fine too. You NEED drs with the torque of the Roush if you want to have fun.

BMR cradle lockout kit or Steeda IRS braces.

GreenS550 said:

I had the street comps on an almost similar set up on my '11. 600 rwhp. They are not very sticky. If you want sticky, try the Michelin A/S 3+ in the same size. They are a/s but are much better than the MT street comp tires which are just not very good tires. But, best are drag radials. I used those in the summer and they were good. I had the nittos but MTs and others are fine too. You NEED drs with the torque of the Roush if you want to have fun.

Click to expand...

I appreciate everyone's reply! I will consider to beef up my suspension. I am shopping for vertical links and the cradle, trying to get the best price. I need a suggestion: I want to get rid of my rear tire as it does not do a very good job. I am thinking to upgrade to these NITTO's

https://www.ebay.com/itm/2-New-Nitt...ash=item3d53989d98:g:t5UAAOSwU4FaOThb&vxp=mtr

The spec of the tires are Nt05 - 315/35r20 Tires 35r 20 3153520

I will only be changing the rear setup and will leave the front tires alone. The front will be Mickey T's Street Comp 255 35r20, Rear will be the new Nitto's.

If this tires are not good enough, what set of drag radials do you guys recommend that will fit with my current wheel setup? (35R20)

Now my current spring setup is Eibach Sportline which is an aggressive drop. It may not fit the new 315's so I plan to put back the stock OEM GT springs just for the rear and keep the Eibach Sportline in the front of the vehicle. Is this a good idea?

I think cup2s would be sick.

I'm boosted with 3.73s and stock tire sizes on Indy 500s. I can't hook up for crap in a dig.....but so be it. Car came this way. I'll just leave it alone. From a roll it's pretty good and street driving it's still a ton of fun. But drag racing.....very challenging but drag racing on the street.....not so great....oh well.

Nomadic said:

I'm boosted with 3.73s and stock tire sizes on Indy 500s. I can't hook up for crap in a dig.....but so be it. Car came this way. I'll just leave it alone. From a roll it's pretty good and street driving it's still a ton of fun. But drag racing.....very challenging but drag racing on the street.....not so great....oh well.

Click to expand...

Here you go $100 plus shipping...
https://www.ebay.com/itm/2015-17-Fo...460532?hash=item28535041f4:g:gBsAAOSw3EFZkfqN

When I had M/T Street Comps I could hook either and I had stock power at the time. Personally, I think their garbage and many who have had them call 'em Ice Skates. I would seriously think about going into a much higher class of tire.

As other have said here too, building up your suspension would help as well. I would attack it from multiple points. Springs/dampeners/IRS support/bushings.

Good luck!