SB 4" strokers and timing ?
#1091294
10/09/11 03:38 PM
10/09/11 03:38 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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So I have small chamber W5's, 53 cc's, a pretty tight quench at .031 and about 12.7 compression. I ran my old 360 at 34* and never screwed with it. I guess what I'm wondering is with the increased piston speed of the stroker I probably don't need as much advance. I had it set at 34 initially and I just knocked it back to 30 and it sounds better just running in the garage.
I know I need to experiment but I can't get out to the track now until November. I was going to go today but there is a storm system to the south of us that is just wreaking havoc on the weather. So what have you all found your car likes?
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: SB 4" strokers and timing ?
[Re: justinp61]
#1091298
10/09/11 04:28 PM
10/09/11 04:28 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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Quote:
Mine picked up going from 34* to 32*, it has .034" quench. In one of Ryan's posts a couple years ago he posted some dyno results on one of his engines. The engine had good quench and small chamber heads with dual quench pads. IIRC it made the most power at 28*.
That was my thinking too, These heads have double quench pads, I may knock it down to 26 to start with.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: SB 4" strokers and timing ?
[Re: Guitar Jones]
#1091299
10/09/11 04:52 PM
10/09/11 04:52 PM
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Joined: Jan 2003
Posts: 4,084
Indiana
W5Duster436
master
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master
Joined: Jan 2003
Posts: 4,084
Indiana
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My 364 made most power at 39*. Same topend on my 4.125 stroke 436ci and dyno session it appeared the timing was at ~38* where it made most power but I don't think Ryan's light was working correctly so the distributor was just marked. Unfortunately I had to take the distributor out when putting the engine back in so the only thing I could do was line up the mark as close as possible and that's where it comes up around ~38.
I still have gremlins on this car and it still doesn't appear to have the power that it should have. I am hoping to get it to a chassis dyno soon so I can find out exactly where the timing should be. Will keep all informed. :-)
'70 Duster - SDSS 436 W5 4spd (Gone)
'71 Dodge D100
'70 Dodge W100
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Re: SB 4" strokers and timing ?
[Re: W5Duster436]
#1091300
10/09/11 05:03 PM
10/09/11 05:03 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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started out @ 32* went to 34* and it seemed to like it,,,that is where I am at today. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: SB 4" strokers and timing ?
[Re: dogdays]
#1091306
10/12/11 05:29 PM
10/12/11 05:29 PM
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Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
Guitar Jones
OP
Paddle faster! I hear banjo music!
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OP
Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,630
in a cattle trailer down by th...
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Quote:
It's 100% the combustion chamber and doesn't matter what shortblock is under it. (Of course, the top of the piston is the bottom of the combustion chamber.) The better the chamber the shorter ignition lead required for max power.
R.
Hmm, I have a 20cc dish piston including the .350 deep valve reliefs so it's not a lot of dish.
Thanks for the answers, I guess I'm in the ballpark at 30 and I'll work from there.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: SB 4" strokers and timing ?
[Re: Guitar Jones]
#1091307
10/12/11 05:48 PM
10/12/11 05:48 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
It's 100% the combustion chamber and doesn't matter what shortblock is under it. (Of course, the top of the piston is the bottom of the combustion chamber.) The better the chamber the shorter ignition lead required for max power.
R.
Hmm, I have a 20cc dish piston including the .350 deep valve reliefs so it's not a lot of dish.
Thanks for the answers, I guess I'm in the ballpark at 30 and I'll work from there.
I would think that you would be better off with a
bit more timing... my W-9 likes 34* and most of my
W heads like right at 34* or a touch more... I'm talking
W-2, W-5, or W-9... I'm gonna have to test with my
W-5s on my 416 and pump gas to see what it likes...
I set it up for 34* to start with
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Re: SB 4" strokers and timing ?
[Re: Guitar Jones]
#1091309
10/13/11 02:31 PM
10/13/11 02:31 PM
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Joined: Jan 2003
Posts: 11,710
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,710
Portage,michigan
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Quote:
So I have small chamber W5's, 53 cc's, a pretty tight quench at .031 and about 12.7 compression. I ran my old 360 at 34* and never screwed with it. I guess what I'm wondering is with the increased piston speed of the stroker I probably don't need as much advance. I had it set at 34 initially and I just knocked it back to 30 and it sounds better just running in the garage.
I know I need to experiment but I can't get out to the track now until November. I was going to go today but there is a storm system to the south of us that is just wreaking havoc on the weather. So what have you all found your car likes?
i had w5's on a 416 shortblock about 11.5 compression with a 260/266 flat tappet that through trial and error found it was fastest with 40 degrees of timing...turn it back and the car fell off,..was a tenth slower with 34/36 degrees in it on back to back laps.
fast forward, same heads on a new 13.3 roller 422 shortblock, car ran best at 32 degrees, i could put 28 in it and that killed a tenth....so, it depends... 
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, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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