| From | Message |
50
GenIII
 
2/08/2001
00:37:22
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 Subject: Rocker arm ratio
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Message:
What is the stock rocker arm ratio on the 5.2 engine? I thought it was 1.5:1 but lately I've seen some info leading me to believe it is 1.6:1.
Wayne
'99 5.2
Wayne Van Metre
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Bernd
GenIII
2/08/2001
01:40:05
| RE: Rocker arm ratio
IP: Logged
Message:
1.6:1 is the factory ratio Wayne.
- Bernd
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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50
GenIII
2/08/2001
02:26:46
| RE: Rocker arm ratio
IP: Logged
Message:
Bernd,
Thanks tons.
Say, do you ever sleep? I'm up at this hour because I work nights.
We need a chat room!
Wayne Van Metre
'99 5.2/auto/3.55 ls
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Brad
GenI
2/08/2001
13:45:20
| RE: Rocker arm ratio
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Message:
I just ordered the 1.7:1 rocker arms from Crower. How difficult is it to install these? Going on a 97 5.2L.
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JAMES
Unregistered
2/08/2001
14:00:52
| RE: Rocker arm ratio
IP: Logged
Message:
Where did you order 1.7 from and how $$.
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Brad
GenIII
2/08/2001
15:16:17
| RE: Rocker arm ratio
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Message:
Right from the crower web site. probably not the best deal but I know I will get what I ask for. Think it was around $485
97 5.2L
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Brad
GenIII
2/08/2001
15:32:51
| RE: Rocker arm ratio
IP: Logged
Message:
Looks like you can get them cheaper at krc performance.
97 5.2L
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Bernd
GenIII
2/12/2001
12:28:28
| RE: Rocker arm ratio
IP: Logged
Message:
If you order the 1.7:1's, get the kit...don't just install the rollers. Also, you'll need taller valve covers on the V8's to fit the 1.7's under there (Mopar Performance Valve Covers work well). On the V6's, you remove the baffle uder the valve cover.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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50
GenIII
2/12/2001
12:49:08
| RE: Rocker arm ratio
IP: Logged
Message:
What does the kit consist of?
Wayne Van Metre
'99 5.2/auto/3.55 ls
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JIM
Unregistered
2/12/2001
15:06:10
| RE: Rocker arm ratio
IP: Logged
Message:
WHy would you need the kit? Are the pushrods too weak and could break? How much axtra is the kit. When I talked to Truckperformance center he told me I dont need the kit is this true. What are the benifits
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Brad
GenIII
2/13/2001
13:15:58
| RE: Rocker arm ratio
IP: Logged
Message:
So The 1.7's won't fit under the stock vale covers even though they say they will on the crower website? Figures!! I didn't get the kit because I'm running the stock computer so I can't get over 5300 rpm's (I think that is the limiter) anyway. And mopar doesn't make a performance computer for my truck. 97 5.2L automatic federal.
97 5.2L
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RR
Unregistered
2/13/2001
22:22:50
| RE: Rocker arm ratio
IP: Logged
Message:
Last time I looked the website said they fit if you trim the valve cover baffle. I thought the rev limit was 5200 until I put headers on. I've seen 5700 but was afraid to go any higher. Power was
falling off by then anyway. 98 5.2 5sp
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Bernd
GenIII
2/14/2001
12:21:01
| RE: Rocker arm ratio
IP: Logged
Message:
The ratio is higher and the factory pushrods may slip at higher rpm's (5300-5500+). If you're not going to be running past 5200rpm, the standard kit (#73656K) will work. If you plan on running past this, the complete kit (P/N# 73656PK) is safer.
Remember though, the factory engines (5.2/5.9L) were not designed to run past 5500rpm max. The HP and TQ curves also confirm this and 5100-5200 is the max shift point required to keep you in the powerband. Running past 5200rpm is asking for problems.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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50
GenIII
2/14/2001
12:26:47
| RE: Rocker arm ratio
IP: Logged
Message:
Good info. Thanks a lot, Bernd.
Wayne Van Metre
'99 5.2/auto/3.55 ls
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Jon Smith
Unregistered
2/16/2001
19:16:10
| RE: Rocker arm ratio
IP: Logged
Message:
Hardened pushrods are good insurance, as are stiffer valve springs. Both are kinda pointless though, until you really start modding the motor. Anything shy of cam/headwork, your peak hp/tq will be well below ~5200-5300 rpm (near boderline grenading of stock valvetrain). So until you go into the motor, the stock valvetrain components will suffice, just be VERY carefull when turning 5k rpm or more.. (which is pointless b/c you make so little power...) :)
The 1.7s (all roller rockers really..) will fit with the stock valve covers, but you need to beat the oil baffles out. 1.7s *may* need taller covers regardless...
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