What performance mods are needed for a stock regular Hellcat to be as fast as the Demon and C7 ZR1 Corvette?

Cat_On_Tren said:

Good points you brought up, appreciate it. I think that ZR1 is gunna be some good hefty mods to compete with… probably like an upper/lower e-85 type of deal like you mentioned. Like a dog chasing a rabbit lol.

The minor mods I mentioned like the tune, upper pulley, and injectors will probably be faster than a Redeye and C7 Z06 but for the other two cars I might need a little more sauce for probably.

I heard good things about Gear Heads as well as American Muscle Performance in Pompano beach. Have you heard of AMP? If so, which of the two shops would you choose to get your car worked on?

Click to expand...

I would suggest you contact High Horse Performance in Delaware. Not sure where you are located but I was able to ship my car to them from Lexington Ky. which is more than 10 hours away for $2000 bucks round trip on a single car trailer. The car never gets touched except to take it on and off the trailer at the shop and my house. It could have been shipped for a lot less if I wanted it on a multi car trailer. I told them about all the modifications I had already done myself, my horsepower goals, and what budget I would like to stick with and they did a phenomenal job. After they got the car I even added some AAD suspension parts to the list of things I wanted and told them that they could add anything they needed to essentially and they did not up-sell me on a single solitary thing. Most places would have pushed me to add parts I didn't really need to make more money. I even suggested a few things that I had read about to add to the build and they talked me out of them, explaining why they would not help performance or how they would hurt the daily drivability of the car. The long and short of it is I spent about $25k with them and I have a bulletproof Redeye with two tunes and 2 different upper pulleys that are easy to switch out. One is for "high" boost on E85 making 945 wheel horsepower and one is "low" boost (slightly more than stock) for 93 octane that makes 830 wheel horsepower. They dyno tested it and give you the results and video of your car on the dyno to boot. I have been under the car and all through it and all of their work appears to be top-notch, no loose bolts or shortcuts. I would contact them and tell them your budget and ask them to come up with a build plan that will maximize power for your money yet stay as reliable as possible. I should mention I also contacted Forza Performance Tuning in Florida (Brenton Brown) and National Speed in Wilmington, NC and got quotes from both of them. While all three places used some of the same parts, there were differences between them all. I felt HHP's build sheet was the best and their reputation as THE BEST Hemi guys in the U.S. made me choose them. It wasn't exactly super easy letting go of the factory warranty only 13k miles into it on a car that stickered $92K, so I wanted the guys that would do things the best way using the best parts so the car would still be a reliable daily driver if I wanted to.

Cat_On_Tren said:

Thank you for sharing. I live in South Florida so HHP is pretty far from me. I've spoke with shops down here and like Gear Heads Fabrications the best and there pretty good. You did bring up a good point about HHP and I've heard a lot of good things about them as well.

I'll give them a ring and see what they have to say. Sometimes you may want your car in the best hands possible even if it costs the inconvenience of having to get way out of your way.

Click to expand...

Well to be honest at first I was going to go with Forza Tuning and do their Stage 4R package with some additional cooling options. Brenton Brown and his shop does have an excellent reputation in the exotic car community and with a number of Mopar people. Really the issue I had with them was communicating with them via email was a real challenge, apparently numerous people answer the email and at the time they were more than a week or so behind answering emails. I eventually got answers to the several emails I sent and I replied to them all with one email thinking the same guy had answered me. Turns out the guy that answered my reply had no idea about the other emails I had sent and took a few days before I got a reply. After sending another email explaining that I was getting frustrated with the confusion Brenton Brown answered me personally and gave me his cell phone number. Once I had that is was great and we communicated thru texts easily. Ultimately his 4R package with some additional cooling and suspension options was the closest thing to what HHP had custom quoted me, however the HHP quote was entirely all the very best parts on the market, a better value price-wise, thoroughly explained to me in detail over the phone and thru email, and a shorter wait time despite a having a bigger and better reputation among Mopar owners. HHP was shorter but still quoted an 8 to 12 week wait to get in, but I wired in my deposit and got in line. I ended up getting lucky as the car ahead of me cancelled, the parts for my car all came in much faster than HHP thought they would, AND they needed my car a week early to get the ECU unlocked. Originally I had planned on buying an extra unlocked OEM ECU but they were many months backordered. The short of it is that they got my car in within 5 weeks of my deposit and they kept it for just 2.5 weeks (1 week waiting for ecu unlock, 1.5 weeks for building it and dyno testing). I received regular updates via email during the build week, and everything that was planned was done to the letter, with only the 105mm Blox throttle body being switched to a 108mm Nick Williams TB due to some fitment concerns with the factory airbox feed. They give you a 12 month warranty on their work just like Forza. I think you would be very wise to to give them a call or shoot them an email despite the additional shipping costs just to see what their plan would be. Like I said previously, just give them your max budget, your ultimate goals for the car and how it will mainly be used, and whether you want to run 93 octane only or if you would consider E85 and they will custom build you a package based off of that info. At least in Ky running E85 hasnt been hard, the pump E85 here measures 85 to 90% almost every single time at the 7 stations in Lexington, Ky. that sell it, it runs colder and makes a lot more power safely than regular gas, and it is $4.20 a gallon versus like 5 to 6 bucks for 93 Octane.