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Re: Any Interest in Smallblock 3.79" Stroke [Re: bigtimeauto] #1327966
10/29/12 02:48 PM
10/29/12 02:48 PM
Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
Plumb Wired Offline
master
Plumb Wired  Offline
master

Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
I'll keep on using my 3.79" stroke cranks and Craftsman Truck W8 junk.


RIP Monte Smith

aka: OutlawFish
'98 Bickel Dodge Dakota PST
Re: Any Interest in Smallblock 3.79" Stroke [Re: Plumb Wired] #1327967
10/29/12 03:31 PM
10/29/12 03:31 PM
Joined: May 2007
Posts: 636
Central,Ohio
FASTFISH420 Offline
mopar
FASTFISH420  Offline
mopar

Joined: May 2007
Posts: 636
Central,Ohio
For my combo 9.0 deck.. I run a 3.72 stroke 2.25 main with 2.0 rod journal 6 inch rod with a 4.22 bore.

Last edited by FASTFISH420; 10/29/12 03:33 PM.

1969 Barracuda 8 second all/motor small block 2014 Shelby GT500 Mustang Uratchko Racing Engines www.URE-RACING.com
Re: Any Interest in Smallblock 3.79" Stroke [Re: mopar dave] #1327968
10/29/12 06:10 PM
10/29/12 06:10 PM
Joined: Dec 2007
Posts: 830
east coast
Otherlane Offline
super stock
Otherlane  Offline
super stock

Joined: Dec 2007
Posts: 830
east coast
Ask bill what does he think is the best sb head,he will tell you brodix mc head

Re: Any Interest in Smallblock 3.79" Stroke [Re: Otherlane] #1327969
10/30/12 10:46 AM
10/30/12 10:46 AM
Joined: May 2003
Posts: 13,202
aZLiViN
J
J_BODY Offline
I Live Here
J_BODY  Offline
I Live Here
J

Joined: May 2003
Posts: 13,202
aZLiViN
Loved our 4" stroke W5 mill we had. Of course we require the "kiss" anology when it comes to performance engines. Not sure what the next combo will consist of, but a Ritter block is on the short list of items we'll be using.

Re: Any Interest in Smallblock 3.79" Stroke [Re: J_BODY] #1327970
10/30/12 01:14 PM
10/30/12 01:14 PM
Joined: Oct 2008
Posts: 458
Michigan
BPE Offline OP
mopar
BPE  Offline OP
mopar

Joined: Oct 2008
Posts: 458
Michigan
Kent is one of them that is pushing me to do the 3.79" stroke.

Rod

Re: Any Interest in Smallblock 3.79" Stroke [Re: BPE] #1327971
10/30/12 02:18 PM
10/30/12 02:18 PM
Joined: Oct 2010
Posts: 463
Rescue CA.
joes68340s Offline
mopar
joes68340s  Offline
mopar

Joined: Oct 2010
Posts: 463
Rescue CA.
Im interested in the 3.79 stroke for 340 mains. I havent checked much, but I cant find anyone selling them anywhere.

Re: Any Interest in Smallblock 3.79" Stroke [Re: joes68340s] #1327972
10/30/12 02:31 PM
10/30/12 02:31 PM
Joined: Nov 2003
Posts: 3,060
Western New York
sixpackbee Offline
master
sixpackbee  Offline
master

Joined: Nov 2003
Posts: 3,060
Western New York
I am going to do a 4.185x3.79 W9 for a nasty street car. 3.79 is a more efficient way to go. I'll sacrafice a few cubes in favor of puting more power pulses down the race track.

Last edited by sixpackbee; 10/30/12 02:32 PM.

1959 Bugeye Sprite
1967 Charger Black L code
1967 Coronet R/T Convert Green 440 auto bought from original owner
1968 Charger R/T Bronze 440 4 spd console AM/FM
1969 Super Bee WM21H B5 A40 D21 N96
1969 Barracuda Formula S 340 Convert pilot car
1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85
1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96
1970 Road Runner RM21N B3 V1X D13
1971 MG Midget
1971 Road Runner RM23H GW3, A57
1972 Road Runner RM23P FY1, D21
Re: Any Interest in Smallblock 3.79" Stroke [Re: sixpackbee] #1327973
10/31/12 01:09 AM
10/31/12 01:09 AM
Joined: Jan 2007
Posts: 8,043
Mt Morris Michigan
mopar dave Offline
master
mopar dave  Offline
master

Joined: Jan 2007
Posts: 8,043
Mt Morris Michigan
i'm using a 71 360 block short filled and i can't go 4.185 bore or i would use the 3.79 crank without second guess. i'm stuck with the 4" crank with my block so i'm thinking something like a 6.4" rod with a 1.250 ch mahle piston. this would give a better rod/stroke ratio(1.6) and a much lighter piston than what i'm currently using.

Re: Any Interest in Smallblock 3.79" Stroke [Re: mopar dave] #1327974
10/31/12 02:00 AM
10/31/12 02:00 AM
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11 Offline
super stock
dodgeboy11  Offline
super stock

Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
Everything else the same, the shorter stroke will make more horsepower at a higher rpm than the longer stroke, but I would bet that add more airflow to the longer stroke and it will make more horsepower at the same higher rpm than the previous setup did with the shorter stroke. The main thing is whether or not the block can handle all the extra stress of the longer stroke.
Now the problem with nascar running a longer stroke is they would have to run larger rod and main journals to make it work. Once they did that then their bearing speed would be excessive and the engines wouldn't want to last in an endurance application at the type of rpm they are running. The other problem is packaging; they would need taller decks to get a similar rod ratio to make it a viable endurance motor for higher rpm. I'm not saying they wouldn't find a way, I'm just listing the problems that I see and why they might choose not to run a longer stroke. Of course if they chose to lower the rpm range, all of my arguments are then invalidated.

Re: Any Interest in Smallblock 3.79" Stroke [Re: dodgeboy11] #1327975
10/31/12 10:04 AM
10/31/12 10:04 AM
Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
bigtimeauto Offline
Trophy Winner
bigtimeauto  Offline
Trophy Winner

Joined: Jun 2007
Posts: 2,646
Plymouth Meeting, PA
Quote:

Everything else the same, the shorter stroke will make more horsepower at a higher rpm than the longer stroke, but I would bet that add more airflow to the longer stroke and it will make more horsepower at the same higher rpm than the previous setup did with the shorter stroke.




well if we added more airflow for the longer stroke couldn't we just add more airflow to the shorter stroke and make more power once again? i would rather have my piston speed due to engine rpm over stroke.

I'll tke the higher rpm, biggest bore, shortest deck and just long enough stroke everyday over those out of square strokers.


BB, TT5,Procharged 3300lb Street Car 4.79/154
Re: Any Interest in Smallblock 3.79" Stroke [Re: BPE] #1327976
10/31/12 11:58 AM
10/31/12 11:58 AM
Joined: Jun 2010
Posts: 3,112
LONG ISLAND
fishy340 Offline
master
fishy340  Offline
master

Joined: Jun 2010
Posts: 3,112
LONG ISLAND
Bigger cranks on a sb have there place(less rpm=less maintenance).. but on a SB more rpm/will make the power u want. If u can get a 440 and up sb to stay alive at 9000+rpm,that would be interesting to see....especally the head used to do it

Re: Any Interest in Smallblock 3.79" Stroke [Re: fishy340] #1327977
10/31/12 05:47 PM
10/31/12 05:47 PM
Joined: Dec 2005
Posts: 11,709
Fulton County, PA
C
CMcAllister Offline
Mr. Helpful
CMcAllister  Offline
Mr. Helpful
C

Joined: Dec 2005
Posts: 11,709
Fulton County, PA
I asked this question recently; maybe this would be a good place to ask again.

We have a MP NOS 3.79 crank in the 1053 material. What is the limit and the potential of this piece? I have an idea of using it in a drag race engine in the 650-700 HP area or in a nice street engine.


If the results don't match the theory, change the theory.
Re: Any Interest in Smallblock 3.79" Stroke [Re: Leon441] #1327978
11/01/12 12:17 AM
11/01/12 12:17 AM
Joined: Mar 2012
Posts: 168
Washington State, USA
W
Winchester 73 Offline
member
Winchester 73  Offline
member
W

Joined: Mar 2012
Posts: 168
Washington State, USA
Quote:

Pro stock does not limit stroke. They limit the cubes at 500. Thats why they run the little stroke and huge bore. More power that way.

I just never understood the 3.79 stroke. 3.800" is much more common in higher end engines. If you have a low deck block 3.800 is about the limit for stroke.

If I had a tall block I would rather have 4.00" but nothing wrong with the shorter stroke if you don't have room.

Leon




i think youre looking at it wrong-they limit cubic inches not valve size thats why they go for huge bores-big head breating.this doesnt concern most folks building mopars becus we have a select menu of heads and cubic inches to put under them .

nascar engine builders have said that a given cubic inch limit that bore vs stroke is not worth enuff persuing and these guys fight for very little hp

Re: Any Interest in Smallblock 3.79" Stroke [Re: Winchester 73] #1327979
11/01/12 12:21 AM
11/01/12 12:21 AM
Joined: Oct 2006
Posts: 4,590
Indy
J
joshking440 Offline
Lunch is on me!
joshking440  Offline
Lunch is on me!
J

Joined: Oct 2006
Posts: 4,590
Indy
Only if it has 360 Rod Journals


and a side of refried beans and salsa please....Rod..Rego

Re: Any Interest in Smallblock 3.79" Stroke [Re: CMcAllister] #1327980
11/01/12 01:11 AM
11/01/12 01:11 AM
Joined: Jan 2003
Posts: 5,486
SoCal
Brian Hafliger Offline
master
Brian Hafliger  Offline
master

Joined: Jan 2003
Posts: 5,486
SoCal
Quote:

I asked this question recently; maybe this would be a good place to ask again.

We have a MP NOS 3.79 crank in the 1053 material. What is the limit and the potential of this piece? I have an idea of using it in a drag race engine in the 650-700 HP area or in a nice street engine.



It will live for a long time but they have a much shorter life than 4340. I'd use it and replace it after maybe 1000 - 1200 passes.
It's all about cycles....


Brian Hafliger
Re: Any Interest in Smallblock 3.79" Stroke [Re: Brian Hafliger] #1327981
11/01/12 09:06 AM
11/01/12 09:06 AM
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
cheapstreetdustr Offline
master
cheapstreetdustr  Offline
master

Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
there are still some classes out there that limit cubic inch in heads up racing...
or atleast the weight brake cut off is around
385"cubes..
this crank is perfect for that..and 4yrs ago i could not find a 3.79 crank to fit my needs..
during MY search..I came across a few guys looking for them also..fwiw


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]
Re: Any Interest in Smallblock 3.79" Stroke [Re: cheapstreetdustr] #1327982
11/04/12 09:02 PM
11/04/12 09:02 PM
Joined: Dec 2003
Posts: 1,325
Orlando Fl
Dos Snails Offline
pro stock
Dos Snails  Offline
pro stock

Joined: Dec 2003
Posts: 1,325
Orlando Fl
How hard for a 3.75???? Better for a 9 in deck with off the shelf Cheby pistons..

Re: Any Interest in Smallblock 3.79" Stroke [Re: Dos Snails] #1327983
11/04/12 10:22 PM
11/04/12 10:22 PM
Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50 Offline
pro stock
D-50  Offline
pro stock

Joined: Oct 2009
Posts: 1,267
North, Alabama
I have a 3.79 stroke crank in my 394 ci motor with 360-2 Indy heads at 10.9 to 1 compression that Brett Miller and Vic Bloomer built and it made 662 at 7300 on 93 octane fuel. I am very happy with the performance so far. I have got a lot of tuning left to do. The best I have ran so far is a 1.34 60ft,6.34 at 108 mph at 2950 lbs.I think there is still alot left in it. I am running a mechanical fuel pump and a 950 holley with no jet changes and no timing changes. I am shifting at 6800.

7449009-CIMG0081.JPG (175 downloads)

1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
Re: Any Interest in Smallblock 3.79" Stroke [Re: D-50] #1327984
11/05/12 11:28 AM
11/05/12 11:28 AM
Joined: Jul 2006
Posts: 528
N.W. Indiana
DblOJoe Offline
mopar
DblOJoe  Offline
mopar

Joined: Jul 2006
Posts: 528
N.W. Indiana
Quote:

I have a 3.79 stroke crank in my 394 ci motor with 360-2 Indy heads at 10.9 to 1 compression that Brett Miller and Vic Bloomer built and it made 662 at 7300 on 93 octane fuel. I am very happy with the performance so far. I have got a lot of tuning left to do. The best I have ran so far is a 1.34 60ft,6.34 at 108 mph at 2950 lbs.I think there is still alot left in it. I am running a mechanical fuel pump and a 950 holley with no jet changes and no timing changes. I am shifting at 6800.




Maybe I could get Vic to clone this for me...

Re: Any Interest in Smallblock 3.79" Stroke [Re: DblOJoe] #1327985
11/05/12 04:18 PM
11/05/12 04:18 PM
Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
MIKES_DUSTER Offline
master
MIKES_DUSTER  Offline
master

Joined: Jan 2003
Posts: 9,146
Now - Port Orange,Fla. Former...
Ok,Im gonna ask a stupid question for some but Im not good with math.
I have a 360,.040..How many cubes would the 3.79 crank make in my block???

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