hello all! new to the forums. got my 2016 hellcat challenger 2 months ago, i upgraded to a 2.75 upper, 10% lower , e-85, brisk sparkies, 1300x injectors, and dual fuel pump. looking to throw in a 426 stroker bottom end so i can turn her up some more & also do some weight reduction. what all do i need to effectively put a 426 in the car properly?
426 stroker build.
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First I would like to say welcome to the 1100hp club. You understand later my young one. 
Second what @ArchGE says is correct. I suggest Josh from HHP if you can get him. Third not in this order but port heads, lower temp spark plugs, ATI Damper 10%, pinning crank, three pump fuel system cannot stress this enough GOOD FUEL!! Kooks Headers and a better supercharger. Talk to Joker Performace about that. I think you are out of the factory supercharger by now with this new setup. Blankets and spacers for superchargers to keep cool. I let you look that one up. It gets you something like this.
Second what @ArchGE says is correct. I suggest Josh from HHP if you can get him. Third not in this order but port heads, lower temp spark plugs, ATI Damper 10%, pinning crank, three pump fuel system cannot stress this enough GOOD FUEL!! Kooks Headers and a better supercharger. Talk to Joker Performace about that. I think you are out of the factory supercharger by now with this new setup. Blankets and spacers for superchargers to keep cool. I let you look that one up. It gets you something like this. 
When I was building high hp cars for clients, I'd listen to what they wanted and ask them what their goals were. The very next question would always be, "And, how long can you handle being without your car?"
That's because 1,100+ hp builds are not done overnight. Mopars take a lot longer to build than the Fords I was building. Once we got all the parts, I could generally turn and burn a 1,200hp car in about 2 months (full body work, frame, engine, driveline, suspension ,etc.) But that was for a blueprinted build we'd done dozens of times before. On one-off builds, that can take a year or more on some cars. I would always ask what their timeline was because that would tell me whether they were serious about getting the build done or not, or if they were just not mentally mature enough to understand the effort, logistics, and cost required to do a build of that magnitude.
Example: Customer pays for a 1,200hp build. We take a % down and start ordering parts. When the first batch arrives, we take their car in and start the deconstruction process and get to work. All goes well until something doesn't work out of the box. Build goes into stasis until a new part arrives. Repeat this process a couple of times as on a build with 50 aftermarket parts, I can bet you 3 or 4 of them are going to be INOP. Hope and pray one of those parts doesn't have a chip or some other backordered component that will delay the timeline. Fuel pumps are fun in that they notoriously have a high chance of failure and they almost always take forever to get replacements. Same holds true for a lot of suspension components. Thus, we may make the engine, build the trans and 99% of the drivetrain, but then the car sits, month after month just waiting on a couple parts. Then, when the customer is thoroughly pissed after waiting 6 months, we have to spend 2-3 weeks dialing in the car... and then that's when you find more parts that weren't up to the task and the cycle continues until such time everything is in the green.
Many months. I averaged 3-4 months per build with the longest taking about 14 months for a total drag conversion on a 2014 Mustang GT with a lot of customer requested modifications (mid-stream no less).
That's because 1,100+ hp builds are not done overnight. Mopars take a lot longer to build than the Fords I was building. Once we got all the parts, I could generally turn and burn a 1,200hp car in about 2 months (full body work, frame, engine, driveline, suspension ,etc.) But that was for a blueprinted build we'd done dozens of times before. On one-off builds, that can take a year or more on some cars. I would always ask what their timeline was because that would tell me whether they were serious about getting the build done or not, or if they were just not mentally mature enough to understand the effort, logistics, and cost required to do a build of that magnitude.
Example: Customer pays for a 1,200hp build. We take a % down and start ordering parts. When the first batch arrives, we take their car in and start the deconstruction process and get to work. All goes well until something doesn't work out of the box. Build goes into stasis until a new part arrives. Repeat this process a couple of times as on a build with 50 aftermarket parts, I can bet you 3 or 4 of them are going to be INOP. Hope and pray one of those parts doesn't have a chip or some other backordered component that will delay the timeline. Fuel pumps are fun in that they notoriously have a high chance of failure and they almost always take forever to get replacements. Same holds true for a lot of suspension components. Thus, we may make the engine, build the trans and 99% of the drivetrain, but then the car sits, month after month just waiting on a couple parts. Then, when the customer is thoroughly pissed after waiting 6 months, we have to spend 2-3 weeks dialing in the car... and then that's when you find more parts that weren't up to the task and the cycle continues until such time everything is in the green.
Many months. I averaged 3-4 months per build with the longest taking about 14 months for a total drag conversion on a 2014 Mustang GT with a lot of customer requested modifications (mid-stream no less).
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446 Posts
That's a loaded question. There are many options for a 426 build. What's needed isnt always what wanted.
U would have to indicate ur budget and HP goals cause Thitek heads are usually a part of that package and so is a billet crank and u will need a bigger blower otherwise its kinda pointless imo ull be spinning it way too hard that thing will grenade!
U pick up about 50 whp with the extra CI's the 426 gives u and about another 50 hp with the Thitek heads and ull need a custom cam from someone and pick up another 40 hp. U can skip the heads and billet crank tho.
ATI balancer, pinned crank. better fuel system, the 1300X are questionable depending on what ur HP goals are with a bigger blower but a well built 426 will handle 1500+ hp.
Ur trans should be good unless ur running a Whipple or a ported 2.7 but still ur trans should be good unless ur launching a lot on a well prepped surface then who knows but ull wanna upgrade ur TQ converter to either a Redeye TQ or something else of ur choice. Ull also have to upgrsade ur suspenion.
Ur valve train will need better springs and retainers usually titanium and U will want to upgrade ur valves and get a 5 angle valve job depending on the mileage of ur motor. U should be running Methanol as well imo
There is quite a long trail of money that comes with building a 426 properly......
U would have to indicate ur budget and HP goals cause Thitek heads are usually a part of that package and so is a billet crank and u will need a bigger blower otherwise its kinda pointless imo ull be spinning it way too hard that thing will grenade!
U pick up about 50 whp with the extra CI's the 426 gives u and about another 50 hp with the Thitek heads and ull need a custom cam from someone and pick up another 40 hp. U can skip the heads and billet crank tho.
ATI balancer, pinned crank. better fuel system, the 1300X are questionable depending on what ur HP goals are with a bigger blower but a well built 426 will handle 1500+ hp.
Ur trans should be good unless ur running a Whipple or a ported 2.7 but still ur trans should be good unless ur launching a lot on a well prepped surface then who knows but ull wanna upgrade ur TQ converter to either a Redeye TQ or something else of ur choice. Ull also have to upgrsade ur suspenion.
Ur valve train will need better springs and retainers usually titanium and U will want to upgrade ur valves and get a 5 angle valve job depending on the mileage of ur motor. U should be running Methanol as well imo
There is quite a long trail of money that comes with building a 426 properly......
I would call Bruce Maichle, Racing & Technical Sales, ext. 302: [email protected]
1-888-894-1115
highhorseperformance.com
Linda
1-888-894-1115
Gen3 Performance Parts Direct Replacement Hellcat Aluminum 4.050 Late Model HEMI Bare Block - Water Version
Gen3 Performance Parts Hellcat Replacement Aluminum 4.050 HEMI Bare Block - Water Version 2021
highhorseperformance.com
Linda
Man he's not lying lol 2.65 and 10% lower is borrowed time, I just got a 426 for my car and looking to get the stock heads ported, already have all that other stuff but I'll be talking with Texas speed to see what we can do with my stock heads. 426 is a good route to go anyway for peace of mind. I have an MMX 426 billet crank Kong max-effort blower with an NX billet lid tuned by team hellcat.
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446 Posts
Dont waste time porting stock heads bro ull gain virtually nothing. If u wanna do it right invest in the Thitek heads so u can run the LS style dual valve springs.
Sounds like a badass build ya got there!
Sounds like a badass build ya got there!
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