512 Ci build

[Chryco Psycho]

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
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[Chryco Psycho]

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

[Chryco Psycho]

 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 .  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. 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:

[303 Mopar]

I'll throw in the list with part numbers for my 505ci (could easily be a 512ci), should be about  550hp/600tq build with 10.34:1 compression that will have nice street manners and be pump gas friendly.

1975 440 block
Camshaft - Lunati 60312 Hyd Roller Duration @ .050 (Int/Exh): 231/239, Gross Valve Lift (Int/Exh): .535/.550, LSA/ICL: 110/106, RPM Range: 2200-6200
Cam Button - Comp 206
Timing chain - Lunati 94225
Roller Lifters - Lunati 72338-16
Rocker Arms - Comp Roller Set 1621-16
Springs - Comp 925
Heads - Edelbrock 60929
Pushrods - Comp 7774
Bronze Dist/oil pump drive - Mopar P3690875
Head Bolts - ARP 145-3606
Main Studs - ARP 140-5401
440 Source Stroker kit - 440.512.5060
Pistons - 5060 4R 4L
Piston Rings - CR6490-35
Rods - 7.1"
Main Bearings - Clevite MS1795V
Rod Bearings - Clevite CB743HN
Cam Bearings - Clevite SH876S
Oil Pan - Summit 440 6 pack deep pan
Oil Pan Gasket - Fel-Pro 1834
Valve Cover Gasket - Moroso 93055
Valley Pan Gasket set - Fel Pro 1215
T-stat - Milodon 180 high flow 16406
Plugs - Champion RC-12YC
Windage Tray - 440 source for stroker
Bore - 4.350
Stroke - 4.25
Head Gaskets - Fel Pro Perma Torque 8519-PT
Carb - Proform 850 Black Street Series 67314
Intake - Holley Street Dominator HLY-300-14
Water Pump/housing - Mancini High Volume Kit MRE6900KAH
TTI 1 7/8 Headers to 3" H-pipe exhaust

[Marc70challenger]

That's just a sweet car.