[pinkeye]

So.. I recently shattered my stock ported supercharger on my 2021 HC Redeye WB Charger.. I am currently having my new block assembled, I am going with twin 72mm borg warner rear mounted turbos, built heads, and block. I am curious if anyone here has built their hellcats over 1500whp daily driven and if so, what (axles, DS, torque converter, or transmission upgrades for Automatic Transmission).

Any help would be awesome!! I can upload build pictures if anyone would like to see, we are about 2 months from starting the engine.

This was the build last year that recently popped..

2021 charger wb redeye 1000whp

 

[Xylander]

I have not built a 1,500hp Hellcat. I have built a few 1,300-1,600whp S550 Mustangs. I wouldn't class any of them as being daily driver qualified though. Sure, they were street legal, but they were miserable in terms of heat production (even with thermal blankets under and inside the car under the carpet). Then, at above 1,500hp, regardless if it is treated as a daily or not, it's a race car... and race cars break.

I dailied an 1,100whp Mustang for 3 years and put 40k miles on it. It chewed up some plugs and a couple coil packs, but nothing else major. The 1,500hp shop car we had was also street legal, but it was constantly breaking down. The engine was fine, but it was driveshafts, axle half shafts, and transmissions that the car chewed up regularly. As in, we went through 4 Magnum XL transmissions, 2 rear diffs, 3 pairs of half shafts and a single piece CF driveshaft in just 1 year.

Whichever route you decide to go, I hope you have better luck with it as I'm of the mind that there's just no getting around to making a 1,500hp car a daily driver (and reliable). On the Hellcat, I can say that you'll need to pay special attention to the rear diff, driveshaft, and transmission, similar to the Mustangs I built. The engine can generally take a lot, but the 'Cat's weak spots are definitely the diff, trans, and driveshaft, in that order. I'm unaware of any mainstream available parts for that power level, so like me, you'll have to resort to having custom built transmissions and the like... which was a large part of our problem due to the quality of work on each unit being variable. C'est la vie.

 

[pinkeye]

I have not built a 1,500hp Hellcat. I have built a few 1,300-1,600whp S550 Mustangs. I wouldn't class any of them as being daily driver qualified though. Sure, they were street legal, but they were miserable in terms of heat production (even with thermal blankets under and inside the car under the carpet). Then, at above 1,500hp, regardless if it is treated as a daily or not, it's a race car... and race cars break.

I dailied an 1,100whp Mustang for 3 years and put 40k miles on it. It chewed up some plugs and a couple coil packs, but nothing else major. The 1,500hp shop car we had was also street legal, but it was constantly breaking down. The engine was fine, but it was driveshafts, axle half shafts, and transmissions that the car chewed up regularly. As in, we went through 4 Magnum XL transmissions, 2 rear diffs, 3 pairs of half shafts and a single piece CF driveshaft in just 1 year.

Whichever route you decide to go, I hope you have better luck with it as I'm of the mind that there's just no getting around to making a 1,500hp car a daily driver (and reliable). On the Hellcat, I can say that you'll need to pay special attention to the rear diff, driveshaft, and transmission, similar to the Mustangs I built. The engine can generally take a lot, but the 'Cat's weak spots are definitely the diff, trans, and driveshaft, in that order. I'm unaware of any mainstream available parts for that power level, so like me, you'll have to resort to having custom built transmissions and the like... which was a large part of our problem due to the quality of work on each unit being variable. C'est la vie.

Well I do appreciate it, I am also worried about those weak points, all my research has lead to nothing mainstream that will handle that type of power. On a good note, I do not plan to take it to the strip, mainly just roll racing and driven on the "nice days". Everyone I know says the strip with that power will snap axles and driveshafts in a hurry.

 

[pinkeye]

Here are some more pictures..

 

[pinkeye]

 

[Xylander]

Well I do appreciate it, I am also worried about those weak points, all my research has lead to nothing mainstream that will handle that type of power. On a good note, I do not plan to take it to the strip, mainly just roll racing and driven on the "nice days". Everyone I know says the strip with that power will snap axles and driveshafts in a hurry.

Anything is possible, it just depends on how much money you're willing to spend on things like custom forged axle halfshafts. I got sick of snapping halfshafts on our shop drag car. We were using the best Ford Performance halfshafts and we were seeing things like leaking boots after 2 passes and they'd snap like twigs after 10. I ended up contracting out to a custom axle manufacturer and ended up ordering a pair of titanium, shortened half shafts (so we could tub the car and run larger slicks). IIRC, the pair ran close to $5,000 and they didn't break for about 100 runs or so. Huge improvement... but also huge cost. When you go into building up to that level of power, I think you're going to run into the same issue and you'll likely have to source quite a few one-off custom made parts if you want to keep it on the road.

If you were building a Ford, I could steer you any number of ways, but as I said, I never built out my Hellcat, so sadly, I can't help

 

[GNBRETT]

First of all why would u chose such giant Turbo's for a street car ur never gonna take to the track? Those are for race cars bro not street cars.

U should have 64's if its a street car at most and a 426ci motor, Billet crank, Diamond 2k pistons and either Wiseco Boostline rods or Calies ultra rods if ur looking to make 1500 whp. Ur pushing it tho cause these blocks are only good to about 1600 hp.

Ur not gonna daily drive 1500 whp who are u kidding with that. Ur dreaming bro not to mention ull get like 5 mpg. Ull need a completely different TQ converter thats quite lose which will again make daily driving not as fun. Ull need outlaw axels and a Mark Williams DS as well as all the AAD billet stuff.

Bro if ur not gonna race ur car I would seriously re-think the custom TT idea especially if ur not buying a kit already made. 1500 hp cars come with LOTS of problems! Im well aware ive had a few and have one now with my Mustang.

If I take my Mustang out and am able to actually drive it back into my garage its a GREAT night! 1500 hp cars break all the time! Come to terms with that even with upgraded parts!

Ur gonna lose everything that made ur Redeye fun and thats the instant TQ u get from the blower. Twin 72's are not gonna spool up fast with a stock stroke especially being rear mounted. Ull have to get on the TB and build some boost off the line. These cars dont have rolling two-steps cause they dont have stand-alones so ull get smashed on the street from a roll cause they will take too long to spool up.

Ur gonna ruin ur Redeye. Put the whipple 3.0 on it with the Thitek heads and a custom Cam and some headers. If u want more power put a Nitrous kit on it. Blower alone will make 1200 whp throw some N20 and u could make 1400 whp. Thats 1600 hp at the crank and u keep all the drivability and ease of tuning!

 

[pinkeye]

Would it be better for my drivetrain if I put the drag radials back on and take the beadlocks with slicks off? I will do my best to prove you wrong, however I am realistic in knowing that racecars do break all the time. Do you know of any custom shops that build the axles, driveshaft, diff, converter, possibly the transmission to handle the power

 

[GNBRETT]

The only issue u would have with ur drivetrain is if the front and rear tires sizes were not within 3% of each other. I hope u prove me wrong bro but think about this for a second.....

The fastest Mustang Coyote in the country is driven by Brett Lasala and he makes 1850 whp with twin 68's and goes low 7's and its a race car so they really wont spool up that fast on the street. Granted, the Hellcat has a larger cubic inch motor but still the 72mm are the biggest Turbo's u can get for the Hellion TT kit and they are reserved for Race cars bro who can build boost on the line with a TB.

The drivetrain only gets abused when u smash the pedal and yes the slicks will hook up better on the street and put more stress on the drivetrain no doubt. But at the power ur looking to make u have no choice unless u wanna skate down the hiway every time u smash the pedal.

There is no DR tire for ur combo bro that will hook up. The very best DR's start spinning past 900 whp.

Twin 72's will make well over 2000 hp. Its not about getting the BIGGEST Turbo's its about selecting the right ones for ur combo and goals. Not sure where u bought them BW's but I would look to return them and get some 64's or 66's.

I can put a 98mm Turbo on my Mustang and probably make good power with it at the track with a loose enugh converter but it would be a pig on the street.

Ur building a STREET car bro...... Try to wrap ur head around that fact.

Why do u need custom axels? The Outlaws axels will support 2000 hp $2000? Transmission, converter and transfer case I would get from Paramount Performance. $10-12k

Driveshaft I would get from Mark Williams. $5000

The Billet Diff can be bought from Hemituner. $4700.

If u go all out on those parts and keep it to around 1200-1300 hp and u probably wont have many issues but u will have some.

Would it be better for my drivetrain if I put the drag radials back on and take the beadlocks with slicks off? I will do my best to prove you wrong, however I am realistic in knowing that racecars do break all the time. Do you know of any custom shops that build the axles, driveshaft, diff, converter, possibly the transmission to handle the power