Re: What sbm stroker to run? Help please
[Re: MGC340]
#1945998
11/05/15 11:54 PM
11/05/15 11:54 PM
|
Joined: Feb 2011
Posts: 1,454 Glendora Ca.
Just-a-dart
pro stock
|
pro stock
Joined: Feb 2011
Posts: 1,454
Glendora Ca.
|
I would do a 4" crank, with a 6.200 long rod. If that block is a stock deck height.
I would also sonic check that block and see what I had to work with before ordering pistons and boring the block.
Last edited by Just-a-dart; 11/05/15 11:54 PM.
"Just a Bracket car dressed up like a streetcar"
|
|
|
Re: What sbm stroker to run? Help please
[Re: MGC340]
#1946007
11/06/15 12:01 AM
11/06/15 12:01 AM
|
Joined: Jan 2003
Posts: 11,719 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,719
Portage,michigan
|
4 inch crank is plenty for W 5 heads. I ran a 422 inch W 5 headed motor for years( 4.100 bore) those heads aren't THAT big. Ryan did mine too. Used the compstar rods( 6.300) with CP Pistons. Raced it 6 seasons, new owner 2 more, then new Pistons beacause it needed a fresh bore. Still together today. The comps stars will be more than adequate, shifted it at 7, trapped about 7500 hundreds of passes. Too bad about the small bore, another reason I wouldn't go past a 4 inch crank.
Last edited by B3422W5; 11/06/15 12:05 AM.
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
|
|
|
Re: What sbm stroker to run? Help please
[Re: B3422W5]
#1946013
11/06/15 12:06 AM
11/06/15 12:06 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
4 inch crank is plenty for W 5 heads. I ran a 422 inch W 5 headed motor for years( 4.100 bore) Used the compstar rods( 6.300) with CP Pistons. Raced it 6 seasons, new owner 2 more, then new Pistons beacause it needed a fresh bore. The comps stars will be more than adequate, shifted it at 7, trapped about 7500 hundreds of passes. Too bad about the small bore, another reason I wouldn't go past a 4 inch crank. Thanks for the info on the Compstars. Ya, the bore is a bummer but I'd hate to bore it .80-.100 over right away
|
|
|
Re: What sbm stroker to run? Help please
[Re: J_BODY]
#1946018
11/06/15 12:09 AM
11/06/15 12:09 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
for a 904 of that caliber you might try contacting Chuck Lofgren over in Cedar MN. Not that far from you and he can build you a very dependable trans. Thanks J_BODY! I remember your duster out at Oahe. I think maybe your dad was driving it then. I was always thinking to myself that car is Bitchen through the muffs! Even cooler now with the w8 setup. 👍🏻
|
|
|
Re: What sbm stroker to run? Help please
[Re: AndyF]
#1946022
11/06/15 12:11 AM
11/06/15 12:11 AM
|
Joined: Jan 2003
Posts: 11,719 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,719
Portage,michigan
|
Unless you are going to change the gear ratio in the car you should build the engine to match the 4.88 gears. Figure out how fast you want to go and then that will tell you what RPM you'll be at in the lights. Once you know the RPM you can figure out the best stroke. I doubt that you want anything over 4 inch stroke but I haven't done the math myself. Why in the world would anybody build a whole motor to match a 300 or 400 dollar set of gears? That makes zero sense. I would build the motor for the intended use, Dyno it, then match the convertor and gears to what you have. Do you ever drag race?
Last edited by B3422W5; 11/06/15 12:11 AM.
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
|
|
|
Re: What sbm stroker to run? Help please
[Re: 79410aspenrt]
#1946023
11/06/15 12:11 AM
11/06/15 12:11 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
I have a 4.125 molnar crank in my 440'' with w2 heads. 653 hp and 590 tq. Nice! I'm building a 79 volare Roadrunner tube chassis car. Nice to see another F body guy on here!
|
|
|
Re: What sbm stroker to run? Help please
[Re: B3422W5]
#1946024
11/06/15 12:13 AM
11/06/15 12:13 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
Unless you are going to change the gear ratio in the car you should build the engine to match the 4.88 gears. Figure out how fast you want to go and then that will tell you what RPM you'll be at in the lights. Once you know the RPM you can figure out the best stroke. I doubt that you want anything over 4 inch stroke but I haven't done the math myself. Why in the world would anybody build a whole motor to match a 300 or 400 dollar set of gears? That makes zero sense. I would build the motor for the intended use, Dyno it, then match the convertor and gears to what you have. Do you ever drag race? The gears can change easy enough it's just what I had in the rearend. B3422W5 how much did your car weight with that combo? What did you ET at if I can ask?
|
|
|
Re: What sbm stroker to run? Help please
[Re: J_BODY]
#1946026
11/06/15 12:22 AM
11/06/15 12:22 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
"UNLESS".... I think you both share the same opinion on the gear deal B3. Personally I'm betting the 4.88 and tall tire will be a dang close fit for that combo. Our W5 ran great with 4.56 gear and 29.5 tire, although we dropped down to 4.30 when we went D60.... wrong choice imho. Jay, what were you guys running for a rotating assembly on your w5 setup? Thanks, Mark
|
|
|
Re: What sbm stroker to run? Help please
[Re: MGC340]
#1946039
11/06/15 12:46 AM
11/06/15 12:46 AM
|
Joined: Jan 2003
Posts: 11,719 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,719
Portage,michigan
|
Car weighed 3350. Super stock springs. 9.80's at 135. Mild roller, Victor W2 modified by Brett. The new owner( I am 300 pounds) tossed 130 pounds off it( 3220 now) bumped compression from 13-1 to 14-1, and swapped to a very aggressive bigger roller that isn't streetable like mine was. 727 trans, 4.30 gear, 28 by 10 tire That all said, the car now has been 9.62@140, still on s/s springs and 10 by 28 quick time pro's. Over this past season the heads finally let go( leaking water and ufixable) and the guy found bare heads (w5)and had Modern CNC them. They are smaller. Best I know of he has been thus far was 9.80, but I suspect it's already run better. It only dynoed about 15-20 horse worse with these new heads, so shouldn't run much worse than he had it running once he has had it out a few times
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
|
|
|
Re: What sbm stroker to run? Help please
[Re: B3422W5]
#1946042
11/06/15 12:56 AM
11/06/15 12:56 AM
|
Joined: May 2012
Posts: 127 Sioux Falls, SD
MGC340
OP
member
|
OP
member
Joined: May 2012
Posts: 127
Sioux Falls, SD
|
Car weighed 3350. Super stock springs. 9.80's at 135. Mild roller, Victor W2 modified by Brett. The new owner( I am 300 pounds) tossed 130 pounds off it( 3220 now) bumped compression from 13-1 to 14-1, and swapped to a very aggressive bigger roller that isn't streetable like mine was. 727 trans, 4.30 gear, 28 by 10 tire That all said, the car now has been 9.62@140, still on s/s springs and 10 by 28 quick time pro's. Over this past season the heads finally let go( leaking water and ufixable) and the guy found bare heads (w5)and had Modern CNC them. They are smaller. Best I know of he has been thus far was 9.80, but I suspect it's already run better. It only dynoed about 15-20 horse worse with these new heads, so shouldn't run much worse than he had it running once he has had it out a few times Very impressive! I think Ryan was pretty conservative with my w5's. Didn't want to turn them into sprinklers lol. There very early w5's, not the blue plug version. I'm hoping to be in that 9.60 area. We will see. Fingers crossed lol
|
|
|
|
|