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Is NE1 running a Dana 70 in a hi HP street application?
#1124933
12/01/11 12:41 PM
12/01/11 12:41 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
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I know that when you are running very high HP application you would probably upgrade to a 9,5" ulta case,,,,but then you can only run a spool and soft gears.....
But when building a super high HP turbo or procharged car for the street, what should you use?
what kind of rear ends are the guys on drag week using?
I wonder if anybody is using a Dana 70 with a locker in a high horsepower application where you dont want soft gears....and where you dont want to use a spool...
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124934
12/01/11 12:56 PM
12/01/11 12:56 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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dana 60 here. i have a 70, but the case is ridiculously huge. i think they use the same gears? i'd go with a d 60. i have a spool, btw. i didn't want to worry about breaking any kind of a posi.
for what is the good life if not doing things thoughtfully?
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124936
12/01/11 01:12 PM
12/01/11 01:12 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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an aftermarket dana 60 with 40 spline axles and 5/8 studs could take 2000 hp, i'm guessing.
for what is the good life if not doing things thoughtfully?
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124937
12/01/11 01:13 PM
12/01/11 01:13 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
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Why bother? My friend goes low 8s with a D60. I see a few misconceptions in your post. First, availability of gears. By "soft" I am assuming you mean 9310 gears. The Dana 60 is a truck rear end which was adapted by ChryCo for its ultra-high performance cars. In trucks you can get ratios from 3.54 through at least 4.88 in "regular" steel. Second, it's not like the 9310 gears are just going to roll over and die. Three factors you can control are type of lubricant, mileage and driving habits. I personally don't believe you are going to drive this car enough to wear out a set of 9310 gears. Third, on to the selection of limited slips. If you can't find a limited slip differential for a Dana 60 you haven't been looking hard enough. Chrysler used both the four pinion PowrLock and the two pinion TracLock. I'm sure there is a Detroit Locker for one. There are others, too. The 9.5" ring gear of the 60 isn't the same as the 10.5" ring gear of the D70. As heavy as the D60 is, the D70 outweighs it and it's physically larger as well. Email www.Doctordiff.com and get his input. R.
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: maximum entropy]
#1124938
12/01/11 01:36 PM
12/01/11 01:36 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Quote:
an aftermarket dana 60 with 40 spline axles and 5/8 studs could take 2000 hp, i'm guessing.
I bet Not
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: dogdays]
#1124940
12/01/11 03:36 PM
12/01/11 03:36 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
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Quote:
Why bother? My friend goes low 8s with a D60.
I see a few misconceptions in your post.
First, availability of gears. By "soft" I am assuming you mean 9310 gears. The Dana 60 is a truck rear end which was adapted by ChryCo for its ultra-high performance cars. In trucks you can get ratios from 3.54 through at least 4.88 in "regular" steel.
Second, it's not like the 9310 gears are just going to roll over and die. Three factors you can control are type of lubricant, mileage and driving habits. I personally don't believe you are going to drive this car enough to wear out a set of 9310 gears.
Third, on to the selection of limited slips. If you can't find a limited slip differential for a Dana 60 you haven't been looking hard enough. Chrysler used both the four pinion PowrLock and the two pinion TracLock. I'm sure there is a Detroit Locker for one. There are others, too.
The 9.5" ring gear of the 60 isn't the same as the 10.5" ring gear of the D70. As heavy as the D60 is, the D70 outweighs it and it's physically larger as well.
Email www.Doctordiff.com and get his input.
R.
Well, yes Im sure the soft gears wont get eaten up instantly on the street, and being a hight output pro charged engine, I guess you would not want regular street grears as well because when you do get it down the sttrip they might shatter....but anyway...thats not the main question here....
Yes I know you can get limited slip diffs for Dana 60s....but that is not the concern here....
the thing is that the ring and pinion on the Dana 60 are dimensionally smaller than the ones on the Dana 70, thus making them weaker. Also the axles are smaller diameter. A Dana 70 would weigh more of course, but how much more??? 50lbs??? If its only 50lbs I dont think its a bad trade if it will take 2000 HP. Also, on a Dana 70 you can still get a Detroit Locker for it. The question here is, would the Detroit Locker become the weak link here? And how much can a Detroit Locker take? Remember this would be for a brute street pump gas car, where a spool (even though stronger for sure) isnt as streetable.
Also the Dana60 is not a 9,5" ring dimater...it is 9,75" and has a pinion diameter of 1,625".....the Dana 70 is a 10,5" ring gear and has a pinion diameter of 1,75"....so it is much stronger for sure.
The 9,5" I was reffering to was something like a Strange Engineering Ultra case with 9,5" gears and a fab housing. Downside is, soft gears and a spool would be my only choices here, not what you would call 100% streetable...and I wonder if it will take 2000 hp.
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124941
12/01/11 03:58 PM
12/01/11 03:58 PM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
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You're talking about building a 2000 hp "street car" and you're worried about a spool not making it streetable? 
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: an8sec70cuda]
#1124943
12/01/11 04:03 PM
12/01/11 04:03 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
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hahahaha
yes.
I dont know if I will ever build a 2000 hp street car....
but I do have a HEMI at Best Machine waiting to be built. And I want to put a pro charger and intercooler on it.
So I figure, 540 cid HEMI, pump gas, ported stage V heads, ray barton rockers, pro charger, billet crank, oliver rods...Im thinking 1200 hp minimum....1500 hp easy....
2000 hp....a stretch??? I dont know....
so Im thnking about what would it take to have a rear end thats built up to snuff and that can be driven on the street. Kinda like Drag Week.
What about the transmission....could a powerglide work here?
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124944
12/01/11 04:16 PM
12/01/11 04:16 PM
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Joined: Mar 2009
Posts: 1,058
bigfork mn
dragram440
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A good friend of mine runs a camero street car makes over 1000 to the wheels with a 9" with no problems. Another friend has a 70 chevelle 540" with big twins made 1470 H.p. to the wheels at sema, Full street trim including full interior, exhaust and mud flaps. car weighs 4000lbs and best run of 8.40's @169 mph. 9" ford lasted 3 years until it twisted the pinion off trying to beat his 8.40 pass he ran earlier in the day.
67' charger 499 RB
10.57 at 127
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124945
12/01/11 04:26 PM
12/01/11 04:26 PM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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I wasn't saying your engine couldn't make 2000 hp, I just think it's funny that you think a spool will make a difference in how a 2000 hp car acts on the street. For your application, I think a well built Dana 60 or 9" Ford will do the job. I personally wouldn't mess w/ the 70, but that's just my  . A spool should be mandatory in my opinion. A GOOD powerglide would be my choice as well.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: an8sec70cuda]
#1124946
12/01/11 04:39 PM
12/01/11 04:39 PM
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Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
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Lima, Peru
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Quote:
I wasn't saying your engine couldn't make 2000 hp, I just think it's funny that you think a spool will make a difference in how a 2000 hp car acts on the street.
For your application, I think a well built Dana 60 or 9" Ford will do the job. I personally wouldn't mess w/ the 70, but that's just my .
A spool should be mandatory in my opinion. A GOOD powerglide would be my choice as well.
I didnt take it that way!!!!
....its just that I have that engine, and its gonna get built eventually, and I dont think it will be anything lower thatn 1200, probably around 1500...I dont know if more, Im not familiar with those builds yet!!!
And yes, I know that its quite a stretch to say that a 1500 hp car is a street car....of course, its pretty stupid!!! LOL!!! who needs that on the street!!! but heck yes Id like to drive such and animal on the streeet, and drive to the track, and have minimal issues....nobody wants to build something like that to have it break down on the way to the track, or to look ridiculous driving it on the street.....its like shoehorning a bathing suit 3 sizes smaller than your actual size and then going to the beach saying "hey it fits" LOL and feel proud about it.....so the more reliable it is, and the more "street friendly" the better. I mean it would be great if I could have a detroit locker and not a spool....but if it cant be had, then it just cant! thats why im asking.
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124947
12/01/11 05:08 PM
12/01/11 05:08 PM
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Joined: Jan 2003
Posts: 13,365
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
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Marion, South Carolina [><]
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Mine makes somewhere in the neighborhood of 850 hp and it's a handful on the street to say the least. Having to pedal the throttle at 70 mph to keep the back tires glued while putting lengths on street bikes is fun though, lol. Honestly, I think the car was a little more fun on the street when it made about 625 hp. It'd kill tires, but it wasn't like driving on ice all the time. I couldn't imagine having 1000+ hp out on the street.
You're gonna need a spool from a strength standpoint. They drive straighter at WOT too.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124949
12/01/11 08:11 PM
12/01/11 08:11 PM
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Joined: Feb 2007
Posts: 5,080
organ
maximum entropy
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realistically it won't matter what rear you run on the street. i ran a 7.25 on the street with a 440 and narrow tires for quite a while. it never did blow. four digit power is going to be an exercise in frustration. your tires won't stand a chance.
for what is the good life if not doing things thoughtfully?
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: domingo]
#1124950
12/01/11 08:33 PM
12/01/11 08:33 PM
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Joined: Apr 2008
Posts: 1,141
Phoenix,Az.
hemicop
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If it were me, a D60 with 40 or 44-spline axles & a spool, driven CAREFULLY with a well built PG (Rossler, TCS, Brunos, etc.) budgeting 5500-10k for a trans would be what I'd expect to pay for a driveline. Keep in mind, though that early F/Cs ran TFs & D60s & were making the kind of horsepower, and more, you're talking about & they lived pretty well. The top SS/AH guys are running in the 900hp area & they're just using a built TF, so I think you're over-building & over thinking your project.
For what it's worth, Car CRaft Magizine's old M/P car run by then-editor John Dianna had a D70 in it, so I guess it IS do-ablebut with today's engineering technology, cryogenics for examle, why would you adhere to the old "bigger is better" theory?
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Re: Is NE1 running a Dana 70 in a hi HP street application?
[Re: maximum entropy]
#1124951
12/01/11 09:18 PM
12/01/11 09:18 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Romeo MI
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Quote:
realistically it won't matter what rear you run on the street. i ran a 7.25 on the street with a 440 and narrow tires for quite a while. it never did blow. four digit power is going to be an exercise in frustration. your tires won't stand a chance.
Thats the main factor.... like he believes it will
hook on the street... I'm sure it would live with
8 3/4 because it wont hook... grand idea though
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a d60 would take that easily. i believe we're talking a turbo car, yes? yes?
