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Author Topic: 512 Stroker Dyno time  (Read 7686 times)
comet_666
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« on: June 16, 2016, 06:34:08 PM »

Put the 512 on the dyno today!!

I think it's 10.75:1 compression. Still getting final details.

4 pulls, still waiting on the print out which I will post along with video

580 HP @ 5400 RPM

660 TQ @ 3900 RPM



* iii_0176.jpg (181.8 KB, 700x525 - viewed 2628 times.)
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Just 6T9 CHGR
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AKA... "The Game Changer"


« Reply #1 on: June 16, 2016, 06:52:48 PM »

Sweet!  Gobs of torque down low cheers
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Chris' '69 Charger R/T

Back N Black
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« Reply #2 on: June 16, 2016, 07:40:46 PM »

Nice!!! do you have the spec of your build?
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comet_666
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« Reply #3 on: June 16, 2016, 08:33:08 PM »

Video

https://www.youtube.com/watch?v=K42AgSQZGwg  - Pull 3

https://youtu.be/zzUd914sV5U - Pull 4


Build:

Eagle Comp rotating assembly 21203
https://www.cnc-motorsports.com/eagle-21203-bb-chrysler-440-520-stroker-competition-rotating-assembly-kit-11-3-1-mahle-flat-top-pistons.html
Edelbrock rpm Heads

Performance cam brgs
Edelbrock Intake rpm 7193
ARP Main Cap Studs 140-5402
ARP Head Bolts 145-3706
Brass soft Plugs
Felpro Head gasket 1009
Felpro intake Valley Peformance
Cam Button and Plate
Howards Hyd Roller Cam 723445-10
Comp Pro Magnum Lifter Hyd.Roller 8921-16
ARP SS Intake Bolts
COMP Cams Pro Magnum Shaft Mount Roller Rocker Arms 1621-16
Timing Chain set Roller thrust brg.
Oil pump 63HP Melling Select
Oil Pump Drive Brass gear for roller gear p3690875
Manley5/16 x.08 Pushrods
High Flow Water Pump Milodon 16360  
Stock Housing
Edelbrock Performer RPM Street Fuel Pumps 1723
Polished Valve Covers SUM440350
Carb  Quick Fuel HR850
Stroker Windage Tray
Alternator   8509DSP
Firecore RTR Dist   CWSFC-1007B
FireCore Performance CD R2R Mini Coil CWSFC-CDM
Converter   729330ATI
3.23 gears   YG C8.42-323
OBX Headers Primary Tube  1.8 " OD
Wizard 26" radiator 1640-100  / 1.25" tubes
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PlainfieldCharger
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« Reply #4 on: June 17, 2016, 07:08:46 AM »

That sounds pretty mean!! 2thumbs That will be fun to drive......... icon_smile_cool
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myk
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« Reply #5 on: June 17, 2016, 07:49:49 AM »

Good times for sure! 
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firefighter3931
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572 street/strip bullet


« Reply #6 on: June 17, 2016, 08:00:54 AM »

Very nicely done !  2thumbs

That'll be a handful on the street   icon_smile_big


Ron
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68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs
Chargerguy74
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« Reply #7 on: June 17, 2016, 11:46:41 AM »

Nice!
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WANTED: NOS or excellent condition 72-74 4 speed shifter boot for bench or centre armrest car, part number 3467755. It's a rubber boot that looks like it's sewn up leather.

WANTED: My original 440 blocks. Serial # 2A188182 and 3A100002
comet_666
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« Reply #8 on: June 19, 2016, 10:14:54 AM »

I have not driven this car in almost 10 years and it was nothing like it is now. I am a bit concerned about my lead foot and my girlfriend is actually a bit scared to ride in it.  popcrn
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XH29N0G
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no matter where you go, there you are


« Reply #9 on: June 19, 2016, 10:40:45 AM »

I have not driven this car in almost 10 years and it was nothing like it is now. I am a bit concerned about my lead foot and my girlfriend is actually a bit scared to ride in it.  popcrn

Well then, take your time to get used to it, and enjoy.   
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Who in their right mind would say

"The science should not stand in the way of this."? 

Science is just observation and hypothesis.  Policy stands in the way.........

Or maybe it protects us. 

I suppose it depends on the specific case.....
68CoronetRT
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« Reply #10 on: August 09, 2016, 07:56:37 PM »

What headers are those?
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comet_666
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« Reply #11 on: August 09, 2016, 08:22:18 PM »

OBX
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500Jon
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« Reply #12 on: September 06, 2016, 12:01:50 PM »

All that lovely power with a Vac Sec and a mech fuel pump!

ENJOY!!! drool5 drool5 drool5
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IF A JOB's WORTH DOING, ITS WORTH DOING WELL, RIP DAD.
4-SPEED, 1969 Charger-500 is the most Coolio car in the World!
chapel40
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1971 383 Factory Air


« Reply #13 on: July 20, 2017, 10:40:25 AM »

Which block is this? 400 or 440?
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Don Chapel
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68 Charger R/T, 493 stroker engine, 727 auto.


« Reply #14 on: July 20, 2017, 10:57:53 AM »

Which block is this? 400 or 440?

It's a RB (440) block. You can see the machined pad on the front left side of the block.
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Tmb84
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« Reply #15 on: August 05, 2017, 06:58:38 AM »

looks nice
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70' Charger 383 -top banana
comet_666
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« Reply #16 on: February 06, 2018, 08:24:51 PM »

Thanks!!
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chapel40
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1971 383 Factory Air


« Reply #17 on: February 07, 2018, 02:25:38 AM »

Thanks for taking the time to put your engine on here, I have used some of the information for the one I'm building. 2thumbs
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Don Chapel
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1971 383 Factory Air


« Reply #18 on: February 19, 2019, 02:08:21 AM »

What is the stall speed of your torque converter?
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Don Chapel
comet_666
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« Reply #19 on: February 19, 2019, 03:57:40 PM »

I believe 3000-3500
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chapel40
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1971 383 Factory Air


« Reply #20 on: February 24, 2019, 01:42:36 AM »

Did you get it installed in the car? How do you like it and how does it perform?
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Don Chapel
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« Reply #21 on: February 24, 2019, 05:18:15 AM »

Completely unsilenced big bore motor, dynoed outside (effectively!)  noise and fumes just venting to the outside world. That shop must be real popular with the neighbours!! Never seen a dyno over hear that wasn't in a sound deadened room with exhaust extraction and filtration and safety guards in case of catastrophic rod or flywheel failure and the operators behind the glass! You Americans and your fun attitude to heath and safety! Long may it continue...LOL!
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comet_666
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« Reply #22 on: February 28, 2019, 07:08:30 PM »

Did you get it installed in the car? How do you like it and how does it perform?
Yes, I have around 3500 miles on it as of now, drives great! With 3:23 rear gears I can cruise at 70 all day and light them up at will.
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comet_666
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« Reply #23 on: February 28, 2019, 07:10:39 PM »

Completely unsilenced big bore motor, dynoed outside (effectively!)  noise and fumes just venting to the outside world. That shop must be real popular with the neighbours!! Never seen a dyno over hear that wasn't in a sound deadened room with exhaust extraction and filtration and safety guards in case of catastrophic rod or flywheel failure and the operators behind the glass! You Americans and your fun attitude to heath and safety! Long may it continue...LOL!
you know..I have watched tons of shows about engines and have seen many on dynos and at no time did it ever occour to me, until you mentioned it, that mine took place exactly as you described lol
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375instroke
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'69 Charger R/T black, '69 Charger 383 Cordovan


« Reply #24 on: March 13, 2019, 06:31:19 PM »

I've only owned stock Mopars.  I'm not used to driving 500HP cars.  I see people commenting on stroker builds with comments like "Dual plane, 850CFM, tiny 1-3/4" headers? Jesus, put a cork in it, why don't you." "You need at least 250@.050", or it'll fall on it's face."  "You need solid cams if you want to make power."

You got a dual plane, 850cfm carb, 1.8" headers, and 235 @.050" hyd. roller cam.  Are the RPM heads the smaller Edelbrock heads?  I see so much hate on "tiny" specs like this, on other posts, and you're making 580 HP @ 5400 RPM and 660 TQ @ 3900 RPM!  Those look like outstanding numbers to me.  How can this not be a blast to drive?
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comet_666
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« Reply #25 on: March 22, 2019, 07:49:33 AM »

I believe the heads are part #60189
It is a blast to drive for sure, i can spin the tires at 50mph which is not necessarily a good thing lol
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Challenger340
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« Reply #26 on: October 07, 2019, 06:13:51 AM »

21203 Eagle Kit is 4.375" Stroke for 520 Cubic Inch ?   
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comet_666
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« Reply #27 on: October 08, 2019, 12:05:53 PM »

yessir, I think it used to say 512-520
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Challenger340
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Better to be a "has been", than a "never was"


« Reply #28 on: October 09, 2019, 10:31:50 AM »

yessir, I think it used to say 512-520

It probably did ?
and no matter, my only purpose noting was that the 4.375" Stroker Cranks can sometimes be a bit tougher to clearance the Block for over by the Oil Pickup Boss ? than the more popular 4.250" 512 Stroker Cranks.

Nice Engine 512/520 nonetheless, good job  2thumbs
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comet_666
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« Reply #29 on: October 11, 2019, 11:47:02 AM »

I believe the link to their site used to say 512-520, Looks like they corrected it, I actually think I have a screen capture of web page when it said 512-520
i'm pretty sure its a 520, my builder did not have issues clearance for pickup. As a matter if fact he wanted to get the biggest kit available as it was the same price.

And thank you for the complement, it really is fun to drive.
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chapel40
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1971 383 Factory Air


« Reply #30 on: October 18, 2019, 03:44:08 AM »

What is your cut off for rpm? are you running it to 6k? More? just wondering if it gets valve float up high. I am building my engine similar to yours with a little bigger hyd. cam and wonder if I am making a mistake. Probably should have used your cam. My cam is spect. at a couple hundred rpm higher than yours.
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Don Chapel
chapel40
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1971 383 Factory Air


« Reply #31 on: October 18, 2019, 03:47:33 AM »

Have you brought it to the track or timed it?
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Don Chapel
comet_666
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« Reply #32 on: October 18, 2019, 02:01:39 PM »

I think the highest I got it was to 5800 RPM on expressway actually last week. I punched it at 3000 rpm (70mph) and it shot to 5800 and got a bit loose in the rear so I backed off.
I have never brought it to the track. I should mention I am running fi-tech on it now.
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Challenger340
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Better to be a "has been", than a "never was"


« Reply #33 on: October 18, 2019, 02:22:08 PM »

What is your cut off for rpm? are you running it to 6k? More? just wondering if it gets valve float up high. I am building my engine similar to yours with a little bigger hyd. cam and wonder if I am making a mistake. Probably should have used your cam. My cam is spect. at a couple hundred rpm higher than yours.

There is absolutely no way to determine what any particular Hydraulic Roller Camshaft will rpm to in an RB Mopar Engine, mainly because these Blocks were never BUILT or intended to run a Hydraulic Roller Lifter.... the Lifter Bores are far too short.... and the Oil gallery far too LARGE where it intersects the Lifter Bore.... with far too SHORT a wear area in the Lifter Bore below that Oil gallery.

In a nutshell what I'm saying is this....
on a  Block with very little Lifter Bore "wear"..... a particular Hydraulic Roller Cam may be capable of maintaining good power right to 6,000 rpm ?
then,
Same Cam installed in a Block with worn Lifter Bores.... may be all done making power at 5,200 rpm ! and no amount of tuning will increase the Lifter Pump up that can be maintained in the "Hydraulic" Lifter in the worn Bore !

That's what happens when you are trying to "balance" a Roller Cams more aggressive Lobes.... faster/harder opening & closing.... against... the ever also increasing V/Spring pressures required to keep things in contact with the more aggressive events...... with a "Hydraulic" plunger as the weak link ?
There is a point where the Oil pressure takes the path of LEAST RESISTANCE ..... and if that is OUT "around" the Lifter Body in the WORN Lifter Bore as opposed to INTO the Lifter to keep it pumped up ? = FAIL to maintain the intended Lobe profile or rpm.
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comet_666
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« Reply #34 on: October 18, 2019, 02:43:50 PM »

if I kept the 3.91 in the car instead of swapping to 3.23 maybe i would have an issue but not the case here.
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