Re: Thoughts on Small block strokers
[Re: Greenwood]
#3091048
11/01/22 11:58 PM
11/01/22 11:58 PM
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Joined: Jan 2003
Posts: 11,723 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,723
Portage,michigan
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I drove over a cast stroker crank( 4 inch arm Eagle) 20 odd years ago at the track. No cast cranks for me after that. For the small difference in cost, when looking at the whole build, it isn’t worth it.
You will be happy. My current small block stroker is very mild, but still lots of fun, they are a great upgrade over stock stroke, less rpm and more torque. Need any help, plenty of us on here are very familiar with them
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: Thoughts on Small block strokers
[Re: Greenwood]
#3091055
11/02/22 01:45 AM
11/02/22 01:45 AM
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Joined: Aug 2003
Posts: 43,251 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,251
Bend,OR USA
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What block and what application? Street, race or both? How big are you wanting to make the motor now? Which heads, intake and cam type? I've built some SB stoker motors for both race only and street and strip using from 3.750 stroke up to 4.00 in both 340 and 360 motors. Mopar use to sell a good forged 3.79 stroke race crank with the 8 bolt Hemi rear flange that should take a lot of abuse I would look at using a crank with SB Chevy rod pin sizes and a good after market race rod with either 6.125 or 6.250 long rods
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Thoughts on Small block strokers
[Re: Greenwood]
#3091145
11/02/22 12:42 PM
11/02/22 12:42 PM
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Joined: Oct 2007
Posts: 4,209 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,209
New York
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less rpm and more torque
Always
Boffin Emeritus
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Re: Thoughts on Small block strokers
[Re: Greenwood]
#3091179
11/02/22 03:00 PM
11/02/22 03:00 PM
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Joined: Jan 2003
Posts: 5,486 SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,486
SoCal
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Well, it appears that I'm SOL on replacing one piston and two rods in the aftermath of my little rod slinging event. Gotta throw a sleeve in it, but that's pretty much it for block work. But, along with a complete set of rods and pistons, I've got to put a different crank in it. I picked up a pretty decent stock unit from a friend, but it will need a grind and a balance. Given all that, I am seriously leaning to putting a stroker in it. So, cast or forged crank? I spin to 7K now. Probably max it at 65-6600 with the big arm. Thoughts and advice? Definitely go 4340 crank and rods, either Molnar or Scat..4" stroke. Icon pistons and good rings. Easy Peezy!!
Brian Hafliger
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Re: Thoughts on Small block strokers
[Re: gregsdart]
#3091180
11/02/22 03:00 PM
11/02/22 03:00 PM
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Joined: Aug 2003
Posts: 4,988 new jersey usa
11secdart
master
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master
Joined: Aug 2003
Posts: 4,988
new jersey usa
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Stroker!!! my 408 was mild at 9.8 to 1 compression for pump gas... R3 block , 600 lift mech.cam , and Indy 360-1 heads made 539 hp and 502 torque .. the amount of torque is what impressed me ! it ran 10.60s in my Dart until the Eagle crank cracked .. imo stay away from cast cranks , as said my combo was mild but had potential to run way faster with a little head porting and a roller cam. With the amount of torque it made I was able to use a 4.10 gear ... it 60ft'ed the same as my non stroker 367 with 4.88s
Last edited by 11secdart; 11/03/22 08:33 AM.
68 Dart 410 / 904 92 D150 original owner 21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4 23 Audi Q5 16 Honda HRV
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Re: Thoughts on Small block strokers
[Re: 11secdart]
#3091188
11/02/22 03:26 PM
11/02/22 03:26 PM
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Joined: Feb 2005
Posts: 20,191 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,191
PA.
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I love them both My sons stock crank 360 has gone 6.54 several times with a .620 lift rolller at 3200 pounds
My 408 has gone best of 5.98 but usually 6.03 at app 2830 pounds with a .650 lift roller cam. Both engines had the same Edelbrock heads, and both were shifted at 6700rpm. I can’t speak for his but my 408 was begging to be shifted higher. Now I’m giving up some ET with my 14-32 slicks compared to his 10 inch radials.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Thoughts on Small block strokers
[Re: Hot 340]
#3091319
11/03/22 06:54 AM
11/03/22 06:54 AM
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Joined: Oct 2015
Posts: 570 UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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There's quite a difference between the Scat and Eagle castings. The Eagles will literally break in a stock rebuild application. LOOK at the cross section of those cranks leading up to the rod crankpin. Ridiculously thin. Absolute garbage. The Scat's castings are thicker and more money. At that point might as well put a steel one in it. Why throw mallory in a stupid casting anyway. My mate just ordered a 4.150 Eagle kit to build his 493BB, I told him no, lets hope it holds up, its a 650>700hp brkt build. On the SB stoker we got a guy here who runs a very mild 340/416 in a sorted Demon in our NSS class> Stock J heads 2.02 10:1CR Hyd. cam, .475"/.494", @.050? small hdrs air gap 750DP, now a TR with 2 650DP's makes around 415fwhp and goes 11.50's, has been in the 11.3's@117, around 3200lbs shifts@5600, traps near 6000, Hughes 3500stall 3.91's/28" slicks, SS springs..
Last edited by rb446; 11/03/22 07:51 AM.
1969 'Cuda 446ci, best 9.96@133.9 in 1990 1971 340 'Cuda, best 11.01@122.8 in 1987
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Re: Thoughts on Small block strokers
[Re: B3422W5]
#3091379
11/03/22 12:34 PM
11/03/22 12:34 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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I drove over a cast stroker crank( 4 inch arm Eagle) 20 odd years ago at the track. No cast cranks for me after that. For the small difference in cost, when looking at the whole build, it isn’t worth it.
You will be happy. My current small block stroker is very mild, but still lots of fun, they are a great upgrade over stock stroke, less rpm and more torque. Need any help, plenty of us on here are very familiar with them SCAT cast is lightyears better than eagle, I wouldn't put an eagle cast crank in a stock head stock cam motor, I have seen it done and it broke. On the other hand I have seen a lot of people put a SCAT cast to the test and never seen one break. Now for my ultimate disclaimer... if it was my money I would go straight to a forged crank if I could find one I would go 4.125 or even 4.250, the TQ is crazy fun with these and even the longer strokes fit in there just fine.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Thoughts on Small block strokers
[Re: HotRodDave]
#3091424
11/03/22 02:45 PM
11/03/22 02:45 PM
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Joined: Dec 2005
Posts: 11,638 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,638
Fulton County, PA
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I've run stock 360 cast cranks over 500HP and 7400 RPM. I've known Super Stock guys to push them harder. Never had a problem, famous last words. I was more concerned with the block at that point. The fret marks on the mating surfaces of the main caps to block told me they were dancing around.
I've always thought the 4.06 - 4.100 with a 3.79 or 3.80 crank was a nice combination. Good rod ratio, could rev it up.
Last edited by CMcAllister; 11/03/22 02:46 PM.
If the results don't match the theory, change the theory.
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