Re: smallblock whats beter 4" stroke or 3.79
[Re: ALKYW5DART]
#1093881
10/13/11 08:04 PM
10/13/11 08:04 PM
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Joined: Jan 2003
Posts: 11,713 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,713
Portage,michigan
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I dont think it would run any worse with the 3.79 crank, than the 4 inch crank. The fact of the matter is that EVEN w5's are too small for anything over 400 cubic inches, Imo. I know my w5 headed 422 was flat gulping for air at about 1150 feet in the 1/4. The 4 inch crank will lower the effective power band down a little, and that might make it more appealing.
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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Re: smallblock whats beter 4" stroke or 3.79
[Re: B3422W5]
#1093882
10/13/11 08:08 PM
10/13/11 08:08 PM
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Joined: Nov 2004
Posts: 4,330 Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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If it will flow 333 on the intake it should handle a 4" stroke.
But, that said, stroke just lowers the power band. In most cases we would not want to turn 10,000 RPM so we elect to go with more stroke and turn 8,500.
I like strokers easier to choose converters and easier to maintain compared to a short stroker making the same power.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: smallblock whats beter 4" stroke or 3.79
[Re: Leon441]
#1093883
10/13/11 08:20 PM
10/13/11 08:20 PM
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Joined: Jan 2003
Posts: 11,713 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,713
Portage,michigan
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My w5 heads " supposedly" flowed 330ish as well, and on one bench they went 297 and on another bench a near identical set of heads were just a touch over 300 max, so numbers are just numbers.
Mine that went 297/303/330 depending on what one wants to believe did go 9.80's at 3350 pounds on a near stock suspension, so..who knows..
But a w5 is for a fact a " small" head for a 400+ inch race motor with a huge 4 inch stroke crank...mine wheezed at the top end,at 7000+ rpm, just small head relatively speaking. That small 2.08 max intake valve just isnt suited for optimal performance on a big inch long arm motor..will it run good, sure, are the heads a governor to a degree on a big inch motor..absolutely.
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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Re: smallblock whats beter 4" stroke or 3.79
[Re: 408strokerdart]
#1093885
10/14/11 12:51 AM
10/14/11 12:51 AM
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Joined: Feb 2004
Posts: 6,257 acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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where are you finding 3.79" cranks? yrs back i looked everywhere for one...and couldnt find. i needed a 385" max cube rule engine for a cheapstreet class.. cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]
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Re: smallblock whats beter 4" stroke or 3.79
[Re: Leon441]
#1093886
10/14/11 01:02 AM
10/14/11 01:02 AM
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Joined: Mar 2007
Posts: 3,300 Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
If it will flow 333 on the intake it should handle a 4" stroke.
But, that said, stroke just lowers the power band. In most cases we would not want to turn 10,000 RPM so we elect to go with more stroke and turn 8,500.
I like strokers easier to choose converters and easier to maintain compared to a short stroker making the same power.
Leon
I agree,select the right cam and gearing and you can make good use of a 4" stroke,maybe even more stroke. Set it up to make some torque instead of winding it to the moon and your valvetrain will thank you. Keith
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Re: smallblock whats beter 4" stroke or 3.79
[Re: Dunnuck Racing]
#1093887
10/14/11 06:55 AM
10/14/11 06:55 AM
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Joined: Jan 2004
Posts: 143 Buenos Aires, ARGENTINA
madmax2
member
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member
Joined: Jan 2004
Posts: 143
Buenos Aires, ARGENTINA
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Who makes pistons for 3.79?
'70 Dodge GTX sb 418ci (Early A-body), Lunati Solid cam 270°/243°@.050/.548", Edelbrock Heads, Weiand X-CELerator, Holley Terminator EFI, Tremec 6 sp manual, 3.90:1, TTI Headers.
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Re: smallblock whats beter 4" stroke or 3.79
[Re: cheapstreetdustr]
#1093889
10/14/11 10:13 AM
10/14/11 10:13 AM
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Joined: Feb 2009
Posts: 1,532 off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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Both K1 and Callies sell a 3.79 stroke crank.
Yeah, it's got a smallblock.
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Re: smallblock whats beter 4" stroke or 3.79
[Re: dogdays]
#1093891
10/14/11 03:30 PM
10/14/11 03:30 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:
If you are head limited the engine will make the same power at 5% less rpm. So if it's 7500 with the 3.79, then it's 7100 with the four incher. If the heads aren't the limiting factor then you'll make 5% more power with the longer stroke.
Build the biggest shortblock you can afford.
There's a quote from Larry Widmer that goes something like this, "RPM means ruins people's motors."
R.
I dis-agree with that last statement... it makes more power... a pro stock turns 10K+ for a reason... more power
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Re: smallblock whats beter 4" stroke or 3.79
[Re: MR_P_BODY]
#1093892
10/14/11 07:10 PM
10/14/11 07:10 PM
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Joined: Jan 2003
Posts: 4,616 Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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I know my Indybrocks sure liked the 4" stroke it would run 9.7xx at 138 in a 3000# car with what i call a milder solid roller
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: smallblock whats beter 4" stroke or 3.79
[Re: Leon441]
#1093893
10/14/11 07:15 PM
10/14/11 07:15 PM
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Joined: Jan 2003
Posts: 10,006 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
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Posts: 10,006
Frostbitefalls MN (Rocky&Bullw...
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Quote:
If it will flow 333 on the intake it should handle a 4" stroke.
But, that said, stroke just lowers the power band. In most cases we would not want to turn 10,000 RPM so we elect to go with more stroke and turn 8,500.
I like strokers easier to choose converters and easier to maintain compared to a short stroker making the same power.
Leon
I agree. Big Blocks with similar head flow keep getting faster with more stroke, all the way to 512 cubes and the same airflow you have.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: smallblock whats beter 4" stroke or 3.79
[Re: gregsdart]
#1093894
10/16/11 11:42 PM
10/16/11 11:42 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 bet any money if they changed the rules to allow bigger pro-stock motors they would run them tommorow even if it meant lower RPM. A 4 inch stroke is only a limit to RPM and NOT power or ultimately speed! Run the biggest cubes you can afford, that being said BPE makes it easy and affordable to run a 4.25 crank if you have 340 mains and 4.125 if you have 360 mains.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: smallblock whats beter 4" stroke or 3.79
[Re: Bigcube]
#1093896
10/17/11 11:34 AM
10/17/11 11:34 AM
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Joined: Jan 2007
Posts: 3,695 nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
BIGGER is ALWAYS better
... So your saying that the whole motion of the ocean thing is out....
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