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ironhayden
Dodge Dakota
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3/31/2008
13:23:08
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 Subject: 1.7 viper
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what is the deal with these 1.7 viper rockers are they the ones from a dodge viper and do they work and finally is there a loss in power from them being no rollor rockes. should i use these or just get the HS 1.7 RR.
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J and J Auto
GenII
 
3/31/2008
21:31:42
| RE: 1.7 viper
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Message:
go harland sharp
bolt them in let them bleed down and away you go
15 to 18hp 20 to 25 torque rear wheel gain
from 1600 on up there great
Larry
J&J Auto
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ironhayden
Dodge Dakota
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4/01/2008
10:55:31
| RE: 1.7 viper
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Message:
thanks larry that was my plan but i've just been hearing about the 1.7 viper and woundering about them.
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daddio
Dodge Dakota
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4/01/2008
21:44:03
| RE: 1.7 viper
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Message:
the viper arms are bolt in also. i doubt you'd notice a difference between the 2 driving the truck.
vipers= under 100 bucks
H/S = 250-300 bucks
your call.
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J and J Auto
GenII
4/01/2008
23:06:23
| RE: 1.7 viper
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Message:
I speced out the harlands and they actualy work
out to 1.71 to 1 ratio
They add .030 lift and right around 4 degrees
duration
rated for 8,000 rpm and there pin between each 2
for each cylinder is a lot better than guide
plates which you need hardend push rods to use
A rock solid alinement and a very stable system
The crowers using the washers and the valve stem
for alinement and floating on the stud is no
where near as stable but they work well but
only rated for 5500rpm and I have thrown 1 right
off so I do not recomend them unless you use the
more expensive kit with guide plates, they also
have to be adjusted properly
I have no rev limiter on my truck and it happened
one fine day knocked the keeper and retainer off
the valve was hanging by the seal it could have
been a real disaster
Harlands just bolt in, its the way to go for most
easy install and no valve cover baffle mods
I am running the crowers with guide plates in my
2 stroked motors at the time I did not know
harland was making them for the mag motors
I have seen both harlands and crowers with over
100,000 miles and still just like new but there
was some guide plate and push rod ware
Larry
J&J Auto
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J and J Auto
GenII
4/03/2008
00:11:05
| RE: 1.7 viper
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Message:
As I answered in another post
I have never seen or used the stamped viper
rockers
if the same design running on the half circle
than yes they would work
the friction would drop the power 3 to 4hp so
around a 15 gain if they fit
Larry
J&J Auto
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dakownr
Dodge Dakota
JOIN HERE
4/03/2008
10:11:06
| RE: 1.7 viper
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Message:
as daddio had stated, the viper rockers do bolt right in with no problem whatsoever. I think that it was one of daddio's old posts that convinced me to purchase them. I was very pleased with them. Being that they are sooo much cheaper than the Harlands (which means you can put that money elsewhere to make more power!), they have fantastic bang-for-the-buck value. If you do go with the viper rockers, ONLY get the rocker arms and just use the stock pedestals.
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Mike98
Dodge Dakota
JOIN HERE
4/03/2008
10:34:31
| RE: 1.7 viper
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Message:
I agree that the viper rockers are better bang for the buck, but the Harlands are really nice. I got the rollers for Xmas, and I was really pleased with the quality.
They're ORANGE!
(too bad I can't see them any more)
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J and J Auto
GenII
4/06/2008
23:55:45
| RE: 1.7 viper
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Message:
Orange anodised extruded alm.
If the viper 1.7's work go for it increasing the
lift and duration seeing a bigger cam helps
The crower and the harlands on the dyno show a
gain of 15 to 18 hp at the wheels that is a nice
gain
use the other money for a bigger tb and a cold
air system, good cap rotor and wires help
plugs the best bang for the buck is the ngk Vpower
FR4 stock
FR5 1 colder
a good flowing muff also will help
Larry
J&J Auto
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93/96Dak
Dodge Dakota
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4/07/2008
08:50:00
| RE: 1.7 viper
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Message:
I bought those viper rockers for my 96 5.2. The stock retainers won't work with the vipers. 1) there is too much slop in the viper rockers, even after the bolt torq to 21ft pounds. I ordered the viper retainers, we'll see if these help.
Or am i mission something about this mod?
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dakownr
Dodge Dakota
JOIN HERE
4/08/2008
14:37:44
| RE: 1.7 viper
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Message:
93/96dak, refer to this thread:
http://www.dodgedakota.net/boards/per/13525.html
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93/96Dak
Dodge Dakota
JOIN HERE
4/08/2008
22:21:27
| RE: 1.7 viper
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Message:
Thanks for the info, but still doesn't explain why i have alot of slop in these rockers. Im no engine builder, but i know that this much slop isn't right.
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J and J Auto
GenII
4/10/2008
00:01:12
| RE: 1.7 viper
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Message:
were is the slop
If its just the pushrods stock mesure 6.905 but
the mopar performance pushrods and what is speced
for the V6 is a 6.925 they mesure 6.930 they are
what I run they also give you a slightly strater
angle than the shorter ones
The rockers ride on a half circle that sits
on a pedistal that will not change no matter
what you do to the top
Larry
J&J Auto
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93/96Dak
Dodge Dakota
JOIN HERE
4/10/2008
08:58:43
| RE: 1.7 viper
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Message:
The stock retainers that hold the 1.6 rockers in seem to be too small for the viper 1.7. 1.7's are ok from pushrod to valve, no slop that way. The slop im getting is from side to side.
The "X" "Y" axis. If you know what i mean.
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Warren
Dodge Dakota
JOIN HERE
4/10/2008
10:11:18
| RE: 1.7 viper
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Message:
Got a question for you Larry, is it necessary to install the Mopar performance pushrods(6.925), if I upgrade to the Harland Sharp rockers? If so, where are you getting your pushrods from, I found the rockers on Summitt, but not those pushrods.
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dakownr
Dodge Dakota
JOIN HERE
4/11/2008
09:34:53
| RE: 1.7 viper
IP: Logged
Message:
Message:
"The stock retainers that hold the 1.6 rockers in seem to be too small for the viper 1.7. 1.7's are ok from pushrod to valve, no slop that way. The slop im getting is from side to side.
The "X" "Y" axis. If you know what i mean."
I know exactly what you mean, as I had the same "problem" happen whenever I put the viper rockers on mine. I torqued them and they had the same "slop." I was a little frightened, but as I stated in the post that I referred to above, the new rockers would tick VERY loudly for the first few minutes it was turned on. This went on for maybe a day or so after I had installed them, but then the ticking went away, and I had never had any problem with them whatsoever afterwards. So, what I'm trying to tell you is that based on my experience with them, you shouldn't worry about them, and they will be fine. Let us know how it works out for you.
PS-regarding the viper pedestals: I seem to remember that they are either too tall or too short (or something like that) to work for the V8 magnum applications.
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93/96Dak
Dodge Dakota
JOIN HERE
4/21/2008
18:27:56
|  RE: 1.7 viper
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Message:
1.7s are installed. Along with a flowmaster 40s muffler. Throttle response is better. Ill know more once the computer resets itself.
As for the slop, dakownr is right. After retorqing the rockers, they tightened right up.
I recommend this mod to anyone.
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J and J Auto
GenII
4/23/2008
23:56:23
| RE: 1.7 viper
IP: Logged
Message:
the harlands are just fine with the stock 6.905
push rods
I just had a new set of 16 6.925 mopar performance
push rods collecting dust so I trew them in with
the new cam and lifters
I get almost all of my push rods from summit
racing just ordered a set of 9.5 yesterday for
a ford 400 $27
summitracing.com has some of the best prices out
there and if you find something cheaper they
will match the price
Larry
J&J Auto
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