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Building a 400 stroker

  
Mopar Muscle
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Building a 400 stroker

 
djurmo djurmo
User | Posts: 55 | Joined: 08/10
Posted: 10/26/11
12:44 PM

Hi!
I am building a 400 based stroker and want some advice wath i can change to have the best result. It is for my Coronet 66 with a 727 3000stall and 3,55 gear,
weight 3750. I hope for 600hp and its used for street and some strip. here is my parts.
400 block 0,30

Eagle 4,150 crank

eagle rods

SRP flat top pistons

eddy heads fullported 88cc

Hughes cam and 1,6 rockers

Camshaft Technical Details
Intake Valve Lift 1.5
Exhaust Valve Lift 1.5 .555"
.572"

Intake Valve Lift 1.6
Exhaust Valve Lift 1.6 .591"
.610"

Intake Duration at .050"
Exhaust Duration at .050" 246°
252°

Lobe Separation Angle 108

Intake Opening at .050"
Exhaust Opening at .050" 18° BTC
57° BBC

Intake Closing at .050"
Exhaust Closing at .050" 48° ABC
15° ATC

Edelbrock rpm intake

holley 850hp

1,7/8 hedders 3" collector

Thomas  

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 10/26/11
02:52 PM

djurmo that looks like a decent combo, I'm not real big on the Hughes Cams, they have had some reliability & wear issues of late {cams going flat quickly}, other than that, it looks like a decent combo for sure, I would suggest, a quality, Harmonic Damper/Balancer, quality flex plate, ARP or equal quality engine hardware {studs, nuts, bolts, washers, etc.}, quality Commetic, Hussie or Felpro gaskets, a windage tray &/or a good 6+quart baffled oil pan, quality oil pump & matching pick-up, gasket matching & blending the intake manifold to the heads, a good electronic ignition distributor, hot ignition box & coil, with low OHM resistance plug wires, TTI #383178 headers, 2.5" or larger free flowing exhaust sytem like Flowmaster or equal, a 3/8" {#6 A/N} fuel line & pick up minimum, 1/2" {#8 A/N} would be better, high volume fuel pump {electric or mechanical & a hardened pump shaft if mech. pump is used} & quality regulator {bypass style preferred} & cleanable filters before & after the fuel pump, either Proform or Quickfuels tunable & adjustable carburetor metering plates, assorted Holley tuning parts, like larger accelerator pump discharge nozzles {squirters}, 50cc acc. pumps & assorted pump cams, assorted power valves {if used}, assorted main jets & rear bowl jet extensions, a K&N air filter element {probably will need a drop base air cleaner for hood clearance}, are highly suggested also...  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

saasman saasman
New User | Posts: 9 | Joined: 10/09
Posted: 01/08/12
08:34 PM

I can't give you any suggestions on the motor , sounds like you got most of it figured out, what I can tell you is , I had a 451 stroker , stock 915 heads in a 66 fury III , 4120 lbs with me in it , 727 with a manual valve body and 3500 stall, 3:91 posi on 28x10 slicks.  
It launched hard with 1.72 60 fts. ran 12.60's ( 107 mph ) at sea level.  
I did not have good heads on the motor , so it was all torque, I shifted at 5500 rpm's . good luck with the car!!!  

IQ52 IQ52
Guru | Posts: 858 | Joined: 06/10
Posted: 01/08/12
09:35 PM

So you're going to rebuild the 451 with a 4.15 stroker kit. Your cam, the Hughes HTL4652BS should work good. Look carefully at Budnicks suggestions as he has some very good ideas there. If you still have the M1 single plane I sure would try it with this combination. 600 HP should come very easy with your planned build.  

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 01/10/12
09:09 PM

Icon QuoteIQ52:
So you're going to rebuild the 451 with a 4.15 stroker kit. Your cam, the Hughes HTL4652BS should work good. Look carefully at Budnicks suggestions as he has some very good ideas there. If you still have the M1 single plane I sure would try it with this combination. 600 HP should come very easy with your planned build.

Thanks IQ52 , I respect your opinion very much.... Not to nit pick but a 400 & 4.15" stroker crank is a minimum of 493ci not 451ci, that is the 400 with a 413-426-440 3.75" stroke crank....  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

IQ52 IQ52
Guru | Posts: 858 | Joined: 06/10
Posted: 01/10/12
09:56 PM

Icon QuoteIQ52:
So you're going to rebuild the 451 with a 4.15 stroker kit. Your cam, the Hughes HTL4652BS should work good. Look carefully at Budnicks suggestions as he has some very good ideas there. If you still have the M1 single plane I sure would try it with this combination. 600 HP should come very easy with your planned build.

Icon QuoteBudnicks:
Thanks IQ52 , I respect your opinion very much.... Not to nit pick but a 400 & 4.15" stroker crank is a minimum of 493ci not 451ci, that is the 400 with a 413-426-440 3.75" stroke crank....

Budstroker,

When I last had contact with djurmo, he was running a 451 stroker that he was trying to get some more power out of in order to go sub 12.00. In the conversations he mentioned something about excessive oil consumption and overheating the 451 in the past. I got the impression he was going to tear the engine down.

It appears to me that he is rebuilding that 451 with a 4.15 stroker kit. And yes, that will result in 493 cubic inches or more. Because in order to have 451 ci now, the bore must already be 4.375". This would result in 499 ci unless he has had the block sleeved or has procured another block to facilitate installing smaller pistons.

It looks like he now intends to get the extra power by going to a longer stroke and reusing the same heads, block, intake and the new camshaft that he ordered awhile back.

Ergo, he is "going to rebuild the 451 with a 4.15 stroker kit."

Make sense now?  

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 01/11/12
01:57 PM

Yep makes perfect sense nw... IQ52 I really should proof read better, I was just attempting trying to razz you, you don't make many mistakes, in any case, I should have known you were correct all along... It was the way I read it, oh well not the 1st time & probably wont be the last time either, I misinterpret someones post... Sorry for any confusion I may have caused...  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

IQ52 IQ52
Guru | Posts: 858 | Joined: 06/10
Posted: 01/11/12
04:28 PM

Razz on my friend, I make mistrakes too.  

SRT861 SRT861
New User | Posts: 1 | Joined: 01/12
Posted: 01/16/12
12:24 PM

Hello I got a 1972 400 block (3698630) it in the machine shop now getting clean what parts do I need to make 450 hp engine ?  

IQ52 IQ52
Guru | Posts: 858 | Joined: 06/10
Posted: 01/17/12
02:38 AM

What budget? What parts do you already have that you must use? What are you going to use the engine for? Why 450 HP?  

djurmo djurmo
User | Posts: 55 | Joined: 08/10
Posted: 01/20/12
11:33 AM

hi again!
i have a another 400 block 0,30 bore but i keep everything else ex cam rockers and the 750 is now a 850hp, i have sold the 451 shortblock, the oil drinking was a mistake by me i had no supportrings under the oil rings! but you learn the hard way by mistakes. Now i thinking to get a converter with higher tall but i dont know if that will improve my et times? I try to send a film when i am on the track on youtube so you can watch the smoking 451.
thomas  

djurmo djurmo
User | Posts: 55 | Joined: 08/10
Posted: 01/20/12
11:59 AM

http://www.youtube.com/watch?v=kEmICmb9o3Q&feature=youtu.be  

djurmo djurmo
User | Posts: 55 | Joined: 08/10
Posted: 02/06/12
10:09 AM

De  

Spud490 Spud490
User | Posts: 65 | Joined: 01/12
Posted: 02/06/12
08:19 PM

Depends on your cam and gears. What lift/ duration are yu going with now. You want to be well into the cam's power range. What do yur heads flow and @ what lift. My charger has a 383 w/11.5:1 comp, Stealth heads, 590 mopar cam, 4:56 gear, 4200 stall, and it runs 1.68-70  60 ft all day @11.80's @ 114.  
10's or bust!!

djurmo djurmo
User | Posts: 55 | Joined: 08/10
Posted: 04/11/12
09:26 AM

Hi everybody!
Today we run the engine in the dyno and get the result 650f/p at 4400rpm, and 607hp
at 5500rpm. I did replace the huges cam for a hydralic roller  comp  XR292HR-10.
We use 98 octan pump gas. I thought this can be intersting for anybody who is building a mopar stroker. We also test at 2000rpm and result was 203hp and 500f/p.
Have a nice day Thomas