Author Topic: '67 Coronet R/T 512 Stroker Mustang Dyno Results  (Read 11470 times)

Offline 512R/T

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'67 Coronet R/T 512 Stroker Mustang Dyno Results
« on: February 04, 2009 - 01:32:53 pm »
Hey all,
This is my first post here and I know this isn't 'Cuda or Challenger related but I posted this on the coronet registry and it got 600 hits in 3 days.  So to honor my good buddy Chryco Psycho I'm bringing it here to give him even more respect and thanks for being the best, no b.s. straight shooter supercar builder I know of.
Check this out,

After 750 hours body and paint, and about 95% done besides some trim stuff, I finally got the engine broke in and some miles. I have just over 800 miles on the car now. Here's some of the vitals:

440 source balanced 512 kit
4.25 crank
7.1" rods
10.6:1 compression
Lunati solid cam about 580/245
severely ported factory 915s with big valves
Port matched Street Dominator intake
Proform 950 carb
17/8" Ceramic TTI Headers
3" TTI full exhaust with H pipe and Ultra Flow welded mufflers

Solid Motor Mounts
Super Stock Springs
Welded sub frame connectors
Torque Boxes
Optima battery in the trunk

Mustang Dyno Results:
Max Tq 457.3
Max Hp 395.5
Peak Tq was made around 4000 rpm and Peak Hp around 5300 rpm. Keep in mind the power band was smooth and flat as average Tq was 408.2 Ft-lbs from 2100 to 5700 rpm. The lowest it made was 288.6 Ft-lbs at 2100.

Converted to SAE net flywheel HP it made:
527 HP (Average 427hp from 2100-5700rpm)
610 Ft-lbs (Average 545ft-lbs from 2100-5700)


For comparison sake this is a much more "stingy" dyno than a dynojet which generally give an additional 10+%. The operator said mostly anything that hits over 400HP on this dyno is a race piece or supercar. SRT 6.1 Hemi's do about 325 with much less torque. New Supercharged GT-500 Shelby's make about 15 hp less than mine but a bunch less torque. Modded 6.0 vettes about 345 hp. Mildly hopped up 440s about 310 hp

This beast looks all stock with fully restored factory white and black interior and besides a monster tach and a couple gauges down low, runs and drives almost like something your grandma could go get groceries in, as long as she stays out of the north 1/2 of the throttle. If she ventures in that zone she'll be breaking some eggs and crushing the bread.  Its as strong as my stock '01 SVT Cobra was at 1/2 throttle, and can play with new Corvettes like a high schooler against a junior high kid.  Its got 15" billet magnums from wheel vintiques that were double the price but 1/2 the weight of steel with shaved and redlined GTII 235/60s and 275/60s from Diamondback Tires. A true wolf in sheep's clothing.

Its gone from 60-80 miles per hour in 1 second (timed), and every gear feels as strong as the gear before it. Its built to last 80,000 + miles basically maintenance free as it was decided by Chryco for its purpose and for economy etc. to go no bigger than this cubic inch because of rod ratio, so it was built as one mean boulevard bruiser with big torque and wicked flat powerband.  It revs like a motor bike with a 2200 gram rotating assembly (ie small block weight) and weighs about 3700. It sounds like a P****d off T-Rex but with a pretty mild idle at 750 rpms, totally happy on Esso 91 with zero ping.  It gets hand calculated 17 mpg at 70-75 mph in overdrive.

I want to thank the famed Neil Chryco Psycho (head tech on cuda-challenger.com, dodgecharger.com) for doing this build and assembly, master head porting, and restoration along with Barry Lutz from Behr Machine for his amazing machine work. We've seen other strokers put down as much as 50-100 hp less with basically the same components, so it really does matter who's doing the build. I haven't driven it in 2 months but I go to bed every night with a smile on my face.   :smokin:
If anyones considering a stroker for the cost these days, I wouldn't hesitate for a second.
Thanks and good luck with your builds!
__________________
'67 Coronet R/T
Dark red metalllic
512, 833OD, 3:54Dana




Offline pink panther

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #1 on: February 04, 2009 - 01:56:28 pm »
way to go Chryco  :ylsuper:

how about some pics?
Scott   -  Member since 9/18/2005

Offline NoMope Greg

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #2 on: February 04, 2009 - 02:06:36 pm »
CP is the man!  :clapping:

 :useless:

Or to heck with pics - we need video!  :drool:
Greg
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Currently Mopar-less :(


Offline 71bigblock

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #3 on: February 04, 2009 - 11:57:01 pm »
Wow, that sounds awesome.   :drool:

Offline bb71challenger

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #4 on: February 05, 2009 - 12:00:47 am »
Way to go Neil! Wanna come down to sunny New Mexico and build me a motor?  :naughty:
1971 Challenger (OO==== ====OO) getting close!
1970 Challenger (OO########OO) long ways off
*Brett*

Offline Chryco Psycho

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #5 on: February 05, 2009 - 12:41:31 am »
Way to go Neil! Wanna come down to sunny New Mexico and build me a motor?  :naughty:
sure or better yet we build it here & I deliver it & install / tune it

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Offline Moparal

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #6 on: February 05, 2009 - 11:28:09 am »
I am just going through new mexico now. 12 miles in.   Wish I could stop buy and marvel on yer mopar :2thumbs: :burnout:

nivvy

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #7 on: February 05, 2009 - 05:19:59 pm »
i recognize his handle from moparts.... other than engines neil is completely well rounded mopar guy for sure...... he has probably forgotten more than I know . ...  :working:

Offline bb71challenger

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #8 on: February 05, 2009 - 08:02:16 pm »
I am just going through new mexico now. 12 miles in.   Wish I could stop buy and marvel on yer mopar :2thumbs: :burnout:

What part are you in Al? Would love to buy you dinner and chat for a bit if you are in the area. Sounds sorta like you are headed somewhere so by the time you get this you might be in Colorado, Texas, Arizona or Utah lol.
1971 Challenger (OO==== ====OO) getting close!
1970 Challenger (OO########OO) long ways off
*Brett*

Offline moparmaniac59

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #9 on: February 05, 2009 - 08:45:48 pm »
Nice!! Thanks for sharing. Sounds like Neil did an awesome job. I'd love to see a video of that thing doing a burnout or just purring in the garage. I am building a 440 stroker & reading your post makes me excited. Awesome numbers!! :2thumbs:



                                                                    Matt B.
Matt

Offline The Cuda Guy

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #10 on: February 05, 2009 - 09:59:33 pm »
That is similar to the build I would like to do.  Can you PM me the cost figures on that engine?  Thanks.

Don
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Offline bb71challenger

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #11 on: February 05, 2009 - 10:52:49 pm »
Yeah, all kidding aside I am like Don, wanting to know the specs if possible. When I do a stroker motor the only way I can see myself getting it paid for in the next few years is to utilize the 440source stuff. Nice to see you can get some power out of them. Power, reliability and streetability is what I am looking for.
1971 Challenger (OO==== ====OO) getting close!
1970 Challenger (OO########OO) long ways off
*Brett*

Offline Chryco Psycho

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #12 on: February 06, 2009 - 04:22:34 am »
It is a brutally simple build
67 hp block fully clearanced & machined .030 overbore
 440 source 512" stroker , 4.25 crank , 7.1" H beam rods , 5070 pistons ,all balanced
 SFI steel damper 
 44o source deep Windage tray
Hemi Pan w 3/8" pickup
Jp perf billet timing chain
extensively ported 915 [67 440] head castings with 2.08 / 1.81 valves , 10* retainers & locks
 TTi 1 7/8" headers & full 3" exhaust with H pipe
 Holley SD intake extensively ported as well
 Proform 950 race carb
 Mopar electronic Chrome box ignition with a modified advance curve
 Comp Pro magnum roller rockers
 custom pushrods Smith Bros
 Custom ground TF series  UltraDyne / Lunati solid flat tappet cam carefully tailored to match the rpm & gear ratio
 alum water pump housing & pump
 18" clutch fan
 triple core 26 " rad with shroud [this car runs ice cold right on the thermostat]
 McLeod Street Twin Clutch to hold the massive torque

Challenger - You`ll wish You Hadn`t

Offline 512R/T

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #13 on: February 06, 2009 - 01:47:20 pm »
Sorry guys, no pics yet.  Its still tucked away in my badly lit but climate controlled garage for our harsh winter.  I'll get some when I get it out this spring.  I'll have to check receipts for cost.  I remember the Mcleod twin disc clutch alone was about $1200 and came with a billet flywheel and is used on twin turbo Vipers etc. as it is supposedly good for 1200 hp and isn't bad to depress.  Neil I think the pistons are .055 over with that compression ratio if I recall in the 5070 package which makes it 512ci?, .030 bore might be 505ci?  I can probably get some good burnout video this spring as Neil set up a line lock hooked up to a button on the Hurst shifter :burnout:.  It really is a Jekyl and Hyde type of car.  It has a real mean throaty tone and deep/heavy thump to it.  You can tell its one big mean engine. :cheers: When you rev it, it just shreaks at you, different and more mad than other big blocks I've heard.  It revs so fast and sounds really angry like it has a Vendetta against Ford's or something.  :villagers: There is no mistaking it when its running and I've been followed by cops and punks to, but it idles low doesn't stumble, surge or hesitate and in comparison to a new computerized sports car has utterly violent throttle response as I believe a real powerful non computerized car hits harder.  I think when you just have a gas pedal attached to a cable straight to the carb, its so direct, but a new computerized car has to "think" about knock sensors air/fuel etc. every time before unleashing.  I may be wrong but that's my experience.  Neil said he drove an '04 SRT Viper and it felt soft compared to this car.  The best way to describe this thing is picture your self pulling a toy car around at your house on a string on the floor at a constant speed.  Then just sharply yank it to a speed 20-40% faster than its going.  That's what it feels like.  You'll be driving at say 30 mph tap it hard and in an instant before your foot even hits the floor you've picked up another 30 mph.  It doesn't accelerate so much as its just instantly at the next speed.  Its like some big mother giant dude is pulling it on a string and your just a long for the ride  :scared:

Do yourselves a favor, pm Chryco, give him your credit card and you can have your very own monster too.  It can change your life.  It changed mine!  (LOL do you like my infomercial?)

'67 Coronet R/T
Dark red metalllic
512, 833OD, 3:54Dana

Offline Chryco Psycho

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Re: '67 Coronet R/T 512 Stroker Mustang Dyno Results
« Reply #14 on: February 07, 2009 - 02:45:47 am »
it may be .055 over I have done too many to remember , I just recall that the block was stock bore when you got it from me

Challenger - You`ll wish You Hadn`t