440 Stroker kit reccomendations

[flyinlow]

Looking for recommendations on stroker kits you have used . Kit for a '78 block 440 street car . 84CC Mopar performance heads shooting for 10.5 -11:1 CR with good quench numbers, target HP 525.  What have you used ?

Have been looking at Mancini , Summit, Ohio Crank, Indy, and Hughes engine kits.

[Challenger340]

Looking for recommendations on stroker kits you have used . Kit for a '78 block 440 street car . 84CC Mopar performance heads shooting for 10.5 -11:1 CR with good quench numbers, target HP 525.  What have you used ?

Have been looking at Mancini , Summit, Ohio Crank, Indy, and Hughes engine kits.

GOOD quench on a BB Mopar is .045" to .050".... that's it, that's ALL !

We have seen and documented power Losses on the Dyno going any tighter than .045" on a BB Mopar 4.350" Bore 440 Engine.... and also seen/documented power increases on the Dyno with even HIGHER quench distances above .050" on even larger Bore sizes with BB Mopars..... up to 55 hp gain on a 540 inch/4.500" Bore Engine

you do whatever you want.... but IMO,
Chasing tighter than .045" quench distances is for "bellybutton" engines with 4.00" Bores.....  and should be considered just that..... a dimension for 4.00" BORE ENGINES ONLY ! and absolutely irrelevant on a BB Mopar.

[flyinlow]

Many of the kits have a table for head volume vs CR. They don't always  tell you the piston number or compression height.

Last build was a 446 , SRP pistons with a 2.061 compression height, Eddy 84 cc heads . fel pro 1009 . The quench height was about .050. 

[Challenger340]

Can't give you a Stroker Kit Recommendation..... very simply because, we haven't found any that don't all require various amounts of work to correct ?

Now the "our Kit from XXXXXX was just fine" crowd can chime in ?
just say'in....
alot depends on WHO checks what ?       

Ask any of them WHAT the "Pin-Fit" was as delivered ? or AFTER Correction ?
If all you get is Blank stares ? or "my Machinist did it".... that lacks credibility because either it wasn't CHECKED ? or if it was done/corrected it should be written down for their reference and they should know ?
Vertical Bearing Clrcs ?
Bolt Stretch @ Load ?
and on....
and on....
No matter, as is said.... "Sh*t WILL Run".... same as Pre-Balanced Stroker Kits within 10-15 Grams end to end ? who cares right ?
I mean it's only $150 Bucks !
Good enough because they "just wanna" .... and after all here, they aren't "racing" right ?

[flyinlow]

Can't give you a Stroker Kit Recommendation..... very simply because, we haven't found any that don't all require various amounts of work to correct ?

The machinist said something similar when I asked for a recommendation . He had good results with  Manley  products ,but they don't make a kit for the 440. He said no one kit had all good parts.

[Challenger340]

Can't give you a Stroker Kit Recommendation..... very simply because, we haven't found any that don't all require various amounts of work to correct ?

The machinist said something similar when I asked for a recommendation . He had good results with  Manley  products ,but they don't make a kit for the 440. He said no one kit had all good parts.

No one kit has all good parts..... and ALL Kits require some work no matter the parts.

We source/put together our own Kits.
SCAT Cranks until they FORGOT how to grind them lowside..... now we use SCAT or EAGLE but end up grinding them anyways.... Eagle H-Beams with ARP 2000's..... and either ICON or MAHLE Forgings for Pistons.
Sad state of affairs,
but at least this way we can order the correct Bearing Sizes for where-ever the Crank cleans up/straightens out at ?
We used to order Kits with Bearings that were then totally USELESS .... because after we'd grind/straighten/correct the cranks we'd need different bearings anyways.

True story.... NO Names
*Order Stroker Kits
* Check Cranks when Stroker Kits arrived and found most to be various degree's of garbage Grinds... but more importantly Cranks are pretty much ALL "BENT" .0022" to .0023"
* Phone manufacturer and ask... "What's your Spec for your Crank runout" ?
* they answer... "Our Spec is no more than .0015" "  (I was surprised because my spec is less than .001" ? but oh well)
* Me: "well I got some here that are ALL well over .002" runout.... but before I ship them back on my Nickel.....  can you go check and make sure you've got some good ones for me" ?
* Them; "Yep, we'll go measure and dig you out some good straight ones as we have 86 more Cranks on hand here, call you back tomorrow
Next day came and went with no phone call....,.
Next day after came and went also with no phone call....
* 3 rd day I phoned: "Remember me ? what do you have for Cranks" ?
* Them.... "uh.... well.... we don't have any here under .002" runout.... sorry"
* Me: "But I thought you said YOUR Spec was NO MORE than .0015".... but you are telling me now ALL the Cranks you have on hand are OVER .002" runout ?"
* Them: "Yeah.... I know" (Extricating Size 13 from Yap)

[c00nhunterjoe]

I returned 3 cranks from a top name company for the 572 for similar reasons. It seems quality control is nearly non existant anymore. I expect the "nobody expects perfection" answer from the lower level parts manufactures but when you are paying that kind of money from a top tier company- i at least am paying for perfection.

[Brass]

Now the "our Kit from XXXXXX was just fine" crowd can chime in ?

Sure:  To the OP, I would add Molnar Technologies to your list.

[flyinlow]

Now the "our Kit from XXXXXX was just fine" crowd can chime in ?

Sure:  To the OP, I would add Molnar Technologies to your list.

I will check them out.


Hughes can't get cranks, Mancini cant get pistons, Summit est. 6weeks. May end up mixing anyway.

440 Source said they can ship next week.

[Brass]

Maybe these guys can help you out:  http://www.musclemotorsracing.com/new-page 

[c00nhunterjoe]

Now the "our Kit from XXXXXX was just fine" crowd can chime in ?

Sure:  To the OP, I would add Molnar Technologies to your list.

For a low hp street build, but i was not impressed with them for a higher hp build. tried a 4.5" crank, not happy with it.

[metallicareload99]

Maybe these guys can help you out:  http://www.musclemotorsracing.com/new-page 

I think those guys went out of business years ago 

[Brass]

Deleted.

[Brass]

I returned 3 cranks from a top name company for the 572 for similar reasons. It seems quality control is nearly non existant anymore. I expect the "nobody expects perfection" answer from the lower level parts manufactures but when you are paying that kind of money from a top tier company- i at least am paying for perfection.

I hear you on that.  "You get what you pay for" when it comes to value received does not seem to hold as true as it once did anymore.  Sadly, paying a top-dollar premium does not assure top-shelf quality.  And it's not just in the automotive world.