I still have have 2.62 out of my 16 HC. Can someone tell me if it will fit my Redeye? I thought I read the axle splines were different? I think I'd like to swap mine out if I could.

 

I would really like to try this - what locations do they run on the west coast? The closest I remember seeing was Colorado... still a good distance away for me...

 

https://www.hellcat.org/threads/demon-diff-will-not-work-with-stock-axles.162545/page-4

 

They fit.

Well, I have to agree,..If DS shop claims direct bolt in for these with NO modifications for 15+ Demon/Hellcat/SRT8 ,. then OEM would swap.

The Driveshaft Shop | DODGE 2015+ Demon / Hellcat / SRT8 1400HP Full Chromoly Level 5 Direct Bolt-In Axles - Dodge - Domestic Axles

 

Yes, go to:

East Coast Timing Association – The Fastest Vehicles in the East!

for more details.

 

Hellcat diffs are bolt in swaps with Redeye and Demon. The 41 spline confusion is on the shaft between the CV joints. The diff splines and hub splines are the same.

 

Hi Paul

This article has a good explanation of the differences we saw last year in aerodynamics and gearing - the widebody Hellcat has 16% more drag than a standard body, which offsets all the extra Redeye power at top speed - then it's down to gearing.

2019 Dodge Challenger: 5 Things to Know

Did you change to a 2.62 gear or are you keeping the 3.09?

 

Hi Paul

This article has a good explanation of the differences we saw last year in aerodynamiocs and gearing - the widebody Hellcat has 16% more drag than a standard body, which offsets all the extra Redeye power at top speed - then it's down to gearing.

https://www.motortrend.com/news/2019-dodge-challenger-5-things-know/

Did you change to a 2.62 gear or are you keeping the 3.09?

16% more drag for Widebody? No way!

The numbers posted in that article do not jive with what FCA has posted.

2020 FCA numbers, Hellcat CD is .384 and the Widebody is .398 so closer to 4%.

Frontal area is 26 sq ft for Hellcat and 26.8 sq ft for Widebody.

Sent from my SM-N960U using Tapatalk

 

I kept the 3.09 but have done major mods including a new motor, heads, ported blower, e85 and many other things. I will be trying it out at the 1 1/2 mile race in New Mexico in February. Excited to see what it can do.

 

You are going to do well. I am sure you saw the post a week or two ago that said sixth gear held into the low 190's? What is your goal and guess?

 

I want to make sure I am over 200. Anything else is a bonus. Barth Tuning has it now getting it ready. I am looking forward to it no matter what it runs. The people running the race are good people. Should be a good time.

 

Parts that were suposed to turn stopped doing so .....

 

Is anyone from here going to the Spring Fling?

 

I hve owned and driven both the 2:62 and the 3:09--and there's NO WAY the 2:62 is a faster car on low or big end racing.. The car actually needs the 3:09 to pull through the torque curve. The upper end pull with the 3:09 is so much stronger..
So--DOdge would make an option for their product that would make it slower?? HAHAHA... no way..
Get the 3:09--you won't regret it! and if you have a HellCat with an M6, get the 3:90 diff--BIG improvement!

 

It is a matter of gearing. With the 3.09 you hit seventh gear which has way less power than the 2.62 in 6th gear at the mile. I would agree with you otherwise but we proved it out and I was the slower one with the 3.09. Granted I was widebody(more drag) he was a hellcat(less horsepower).

 

Interesting. I have only managed a best of 153.4 in the 1/2 mile. Stock 2.62 geared lowly 707hp Hellcat at full weight.
I do run at a track known to be an incline mind you. That may make up some of the difference along with weight reduction that southernminncat had.

The event in Maine is only about 8-9 hrs away from me. I keep saying I should check it out.
Hopefully the borders open up and I can make it next year.

 

The car typically ran 150-152mph in the 1/2 mile and 175-178mph in the mile in no-wind conditions; the runs above were between 7-8am with a ~15mph tailwind, so best possible conditions.