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Whp?

5002 Views 29 Replies 8 Participants Last post by  Ohyupppp
Soon to get tuned in two weeks... car has cat delete muffler delete lmi intake 100mm throttle body and ported snout. Stock pulleys. Upgraded coils. What do u think I’ll make. I do use custom mix of fuel
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Soon to get tuned in two weeks... car has cat delete muffler delete lmi intake 100mm throttle body and ported snout. Stock pulleys. Upgraded coils. What do u think I’ll make. I do use custom mix of fuel
Redeye, or regular Hellcat? If just hellcat manual or auto? Without going up on boost your not going to gain a whole lot unless you plan on using a high octane fuel like 110 and give it a bunch of timing but be careful there as one bad detonation event will ruin your day. DONT desensitize your knock sensors, their going to be your only savior.
No way 750 wheel on stock pulley combo
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Here’s a dyno sheet, my M6 Hellcat stock at around 11-12 psi of boost and with a 2.85 pulley and ID 1050’s on good 93 octane fuel splashed with an octane booster as knock sensor volts started to climb and the pro tuner, which was HHP at that time said enough and that was 775 or so wheel. Porting the blower and a bigger TB made 2 lbs more boost, up to 17.5 Psi got me to 855 wheel. I’m at 940 wheel now on corn with a double 285 fuel pump system and lots of drive train parts. I know first Hand the journey to here, its got a price.

This first picture first 2 pulls are stock, middle 2 pulls stock with a KN filter in stock air box, last 2 pulls where with a JLT CIA.
Last dyno sheet the major players are a 2.85 pulley, and ID1050X injectors,

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This next dyno sheet is ported blower, $1000 bilet inlet plate, ported inlet snout, 95mm Fastman TB. Started at 800 wheel before, I tweaked 25 more HP from her with timing changes (timing and octane booster)

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This next dyno sheet is in E85, dual 285 pump system still with work done on the fuel delivery system so the ID 1050’s would still keep up, and about 10,000$ of drive train and suspension goodies to handle the power and get it to the ground
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That was last November. Over winter pulled the engine and went fully forged, Demon Cam, 2700$ Custom made Wiseco pistons, all kinds of goodies, about another 10k, What did that net?
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Nothing yet except for a reliable strong platform to keep going from here. Making HP, at least repeatable long term HP usually cost $
But no doubt good luck on your quest, I’m VERY interested in what you net.
But 9 second Stick full weight Challengers with all the bells and whistles still on the car aren’t a dime a dozen either
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So you have 900whp and run 9.9?
Yes, that’s rowing your own with a 5000 lb with me in it full tank of gas floor mats, all the seats, trunk liner, nothin ever removed from the car just crap added super docil easy to drive idles like stock clutch feels like stock looks like new 9 second whale yes.
And runs 11.0 138-142 depending on DA on the street with 315/35-20 NITTO 555R2 skins.
And this is with a flex tune capable amount of boost, I can go to pump 93 any time and make around 850 wheel on regular pump gas, or put E98 in it and dial up the timing a tad and make close to 1000 wheel. Does about 165 in a 60 mph start 1/3 mile roll race and 5.9-6.10 60-130 sprints, with the AC on and music keeping the beat. In a M6 remember.
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Looking forward to see what your car is making.
16GoManGoHC, which cam are you running? I have an EMP cam and I’m making 880rwhp but 950rwtq. I was hoping to be at 1000+rwhp but the shop said that’s the most they can squeeze out of it with this cam.
I went with a Demon clone cam, wishing I went with the bigger cam I had in hand at the time as I’m not moving much more air now then I was with the stock Hellcat cam. I will say though the smoothness and drivability of this cam is unbelievable. I’m playing with different cam timing tunes now for the time being. May be changing to a Cam Dynamics PD .630 lift cam over winter and Johnson lifters.
Is you EMP cam totally locked out or do you have some VVT left?
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I’m barely just learned how to data log and don’t really know all the details and what to look for exactly but I’d like to know how this cam moves air. When I asked for the specs of the cam the guy at EMP just said it was their best cam. Whatever that means, and it’s completely locked out. The shop that ended up tuning it don’t like them locked out. It’s a bit disappointing when I have a 422 stroker, built heads, with a Redeye supercharger w/ 2.65 upper/10% lower. And not even making 900rwhp. The shop said they think this cam just sacrifices HP for TQ since it made over 100 more TQ than their 1000rwhp package does. 🤷🏻‍♂️
Your HP vs Tq difference is exactly why I was asking if the cam is totally locked out or not as I would have suggested try retarding it a bit and see if the shift shed some torque and gave you some HP. Do you know if the shop degreed the cam when they installed it or just lined it up by marks assumed it was correct and that’s what you have? The cam may be installed a little in the advanced side and that’s why it’s producing so much Tq but your high end HP is suffering because it’s being starved for air up top because of where the cam is set and locked to. I agree, your Tq number looks great but hp is looking low for your build. What kind of dyno these figures come off?
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OK, Dynojet I only ask as different brands give different figures. That is an impressive amount of torque no doubt, and torque is time no doubt but Horsepower is speed, you need a good mix of both. Getting that much torque to hook up is going to be tough even on good prep and big tires but at least with a auto you can try and tune allot of it out down low to launch but now your purposely taking away power you paid to get. I’m by far not a cam expert but that offset of tq vs hp is not the norm unless spray is involved. I’d be wanting to know from the builder was cam actually degreed or just installed by the marks? I know many a pro engine builder that have gotten it wrong, including a recent one where cam was installed 1 tooth off, it wasn’t his first rodeo either, luckily it didn’t crash the engine but he knew from VVT position it was wrong on startup. I build engines myself, I spent 2 days degreeing mine over and over and over again never having to adjust it but wanting to know it was 1000000% correct no doubt before putting it all back together, crashing 2700$ pistons into the valves was not an option. What timing chain set did you use? Stock Hellcat/Redeye set with pinned VVT unit or aftermarket with indexable crank gear and solid cam gear? Did you contact EMP and ask them their opinion of the Tq and HP figures and see what their opinion is?
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