• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 SRT Forum and SRT community dedicated to SRT owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the SRT Forum today!

9.75@142.54

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
#1
Pulled 100lbs out to get to "challenger" weight.

Car still has traction issues with these 305/45/17's with the power this car makes. I think I'm just going to bite the bullet and go 315/50/17.

I'm working with my tuner to get another revision for the shift points and bump the timing a bit. Car was shifting a couple hundred RPMs low from 2-3, 3-4, 4-5.....there is MPH and ET to be gained there.

Either way, I'm chipping away.

8vcwNeqHQXKA+qmQjpDZeA.jpg

 

tkracing1

500 Posts Club
Staff Team
Founding Member
Member ID
#970
Messages
514
Reactions
1,072
City
Bay Area
State
CA
Country
United States
What I Drive
2017 challenger
#2
Hell yeah you are chipping away! Congrats that is moving. 315's (y)
 

Hpindy

Active Member
Founding Member
Member ID
#974
Messages
479
Reactions
670
City
Jackson's Point
State
Non-US
Country
Canada
What I Drive
2018 challenger hellcat
#3
I'm thinking on moving up to the 315/50/17's too

Sent from my BBF100-2 using Tapatalk
 

fubar569

Member
Founding Member
Member ID
#1073
Messages
59
Reactions
51
City
Bradford
State
PA
Country
United States
What I Drive
2018 Charger Hellcat
#4
Is there a boner smiley?
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #5
I'm thinking on moving up to the 315/50/17's too

Sent from my BBF100-2 using Tapatalk
In my opinion I think it gives you a lot of room for error if prep isn't on point. Prep was very very good last night, and I couldn't hook at all unless I squeezed the pedal off idle.
 

Marc W

Active Member
Founding Member
Member ID
#993
Messages
195
Reactions
400
City
St. George
State
UT
Country
United States
What I Drive
2016 Dodge Challenger Hellcat
#6
I replaced the 305 with the 315 after less than consistent 60’s with the 3.09 gears. The 315 is much more consistent. I would never go back.
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #7
Yup. I think this tire is "king", no need to go to a 15"
 

Hpindy

Active Member
Founding Member
Member ID
#974
Messages
479
Reactions
670
City
Jackson's Point
State
Non-US
Country
Canada
What I Drive
2018 challenger hellcat
#8
how much boost do you make with the 2.4 upper pulley?
 

Marc W

Active Member
Founding Member
Member ID
#993
Messages
195
Reactions
400
City
St. George
State
UT
Country
United States
What I Drive
2016 Dodge Challenger Hellcat
#9
Yup. I think this tire is "king", no need to go to a 15"
Haha. Yep. Until you actually need to. My new ones... 57B7E463-E91F-4F39-AAB0-26634F09830E.jpeg
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #10
Yea, you are at "another level" now lol
 

HellcatMatt

Member
Founding Member
Member ID
#1177
Messages
46
Reactions
69
City
Central
State
MN
Country
United States
What I Drive
2016 Challenger Hellcat
#11
Wow! Great job man and still room to go!!

You A8 guys are so lucky to have the available 315/50’s too. I wish they made the bias ply in that height and width. Unfortunately the bias 28x11.50’s measure short and only have a 9.5” tread width as well. (n)

Keep gettin it done FFBOS!
 
Last edited:

Hunter

500 Posts Club
Staff Team
Founding Member
Member ID
#957
Messages
925
Reactions
1,646
City
Moss Point
State
MS
Country
United States
What I Drive
2019 Challenger Hellcat
#12
Outstanding!
Dang fast.
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #13
Just received a PCM/TCM revision this morning. Hope to make it out once more.
 

WhipCat

Member
Founding Member
Member ID
#985
Messages
80
Reactions
75
City
In the Jungle
State
FL
Country
United States
What I Drive
2017 Challenger Hellcat
#14
Nice run bud. That mph is looking real good.

Is this a street tune or a race file?
 

Mean Cat

Active Member
Founding Member
Member ID
#997
Messages
294
Reactions
317
City
Houston
State
TX
Country
United States
What I Drive
2017 Challenger Hellcat
#15
Way to go FFBOS , that is quick ! keep chipping away.
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #16
Nice run bud. That mph is looking real good.

Is this a street tune or a race file?
That tune was 20 degrees of timing, and shifts around 6200-6300.

I have my tune revision in the car now which bumps the timing up to 22 and shifts to around 6400. I only run these tunes when the ethanol tests over 80% on the test tube. My season is creeping up on me here. I'm hoping to get one more visit this year.

I still have to get my 315's on the rims, which has proven to be a pain in my ass getting the bead around the rim. I also have a driveline vibration that I'm going to take a look at tomorrow on a lift to see if anything is loose. If all looks well I should make it out again.
 

WhipCat

Member
Founding Member
Member ID
#985
Messages
80
Reactions
75
City
In the Jungle
State
FL
Country
United States
What I Drive
2017 Challenger Hellcat
#17
That tune was 20 degrees of timing, and shifts around 6200-6300.

I have my tune revision in the car now which bumps the timing up to 22 and shifts to around 6400. I only run these tunes when the ethanol tests over 80% on the test tube. My season is creeping up on me here. I'm hoping to get one more visit this year.

I still have to get my 315's on the rims, which has proven to be a pain in my ass getting the bead around the rim. I also have a driveline vibration that I'm going to take a look at tomorrow on a lift to see if anything is loose. If all looks well I should make it out again.
Good deal.

Those new 315/50/17 are nice. You’ll hook real good with them.

Bud, I’ve been chasing a driveline vibration for over a year! I still have it. Let me know your findings.
 
OP
FFBOS

FFBOS

Member
Founding Member
Member ID
#1008
Messages
60
Reactions
109
City
Mount Prospect
State
IL
Country
United States
What I Drive
2016 Hellcat Charger
Thread Starter #18
Good deal.

Those new 315/50/17 are nice. You’ll hook real good with them.

Bud, I’ve been chasing a driveline vibration for over a year! I still have it. Let me know your findings.
What are your symptoms
 

WhipCat

Member
Founding Member
Member ID
#985
Messages
80
Reactions
75
City
In the Jungle
State
FL
Country
United States
What I Drive
2017 Challenger Hellcat
#19
What are your symptoms
Vibrations is really noticeable between 60-80 mph.

While I’m cruising if I let off the throttle the car stabilized and drives perfectly still. As soon as I apply throttle, the vibration resumes. It’s mega annoying. I’ve replaced 3 driveshafts, changed 2 differentials, changed diff braces, changed wheel and tire combos, swapped a trans, replaced a right rear Shock and still nothing has fixed it. I didn’t do all that to specifically fix vibrations it was just stuff during the course of modding, but still. Super FKn annoying.

I threw a cheap BMR cradle lockout a while back. That’s the only thing left I haven’t really changed since then. I’m swapping that coming up to see. But man!! It’s annoying
 

WhipCat

Member
Founding Member
Member ID
#985
Messages
80
Reactions
75
City
In the Jungle
State
FL
Country
United States
What I Drive
2017 Challenger Hellcat
#20


Top