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93dakman
Dodge Dakota
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11/29/2002
11:23:31
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 Subject: rockers? which are better
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i was wondering what the difference between 1.6 and 1.7 rockers are. and are the stock rockers 1.5?
what makes rollers better thatn what ive got
93 v6, no mods, no coolness, just completely stock
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93dakman
Dodge Dakota
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11/29/2002
12:46:25
|  RE: rockers? which are better
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thanx for the info i learned alot, i dont know what i would do without you people
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POWER HUNGRY
Dodge Dakota
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11/29/2002
12:47:37
|  RE: rockers? which are better
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The stock rockers are 1.6 ratio.
The 1.7 roller rockers lift the valve higher and fast= more power than the 1.6 units on a given cam. The 1.7 are generally used on the stock or a small/custom aftermarket cam and the 1.6rr are used when a larger cam is used over about 206@0.50 lift.
When the cam itself has enough lift the 1.7rr aren't needed and/or won't fit. The 1.6rr have about a 300 greater rpm limit over the 1.7rr on the same valve spring for better high rpm usage.
The stock rocker arms are stamped pieces of steel without a roller tip or fulcrum which results in higher fiction causing hp loss and higher engine temp. They are also weaker and more flexable compared to aftermarket units resulting in loss of lift and are limited in high rpm reliability.
For a picture of the stock rocker arms go to http://www.mopartsracing.com/parts/ram.html
If you think you'll want a lot more power it will be cheaper in the long run to get an aftermarket cam and the 1.6rr. If you want alittle more torque and hp and don't want to change the cam get the 1.7rr(good for about 10-15hp).
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R/T Superbee
Dodge Dakota
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11/29/2002
23:27:46
| RE: rockers? which are better
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I put the 1.7 Crower rr on my R/T. Stock was 1.6. I did not get the increase that I hoped for but did notice a differance. If I had to do it over again I would get the dodge cam kit #P5007551, other than labor, only $150 more and includes the rr lifters with a lot more hp gain.
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kota on 20s
GenIII
11/30/2002
02:18:16
| RE: rockers? which are better
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93 dak, next time you ask a question, give it a little more than 1 hour for a responce.
or if you REALLY need the info quick, you might want to use the (lets say it at once now) SEARCH feature!
-Eric
Injection is nice, but i'd rather be blown.
5.2L, 5speed. Powerdyne SC, 50mm TB, 2bbl M-1, 1.7RR's, MSD 6BTM, ceramic JBA headers, 3
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rtdkota
R/T
11/30/2002
13:38:29
| RE: rockers? which are better
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R/T Superbee-- What kind of performance did you expect? (just curious)-- Did you run at the track to see any before/after ? Did you dyno the truck??
The 1.7s have shown a 12-15+ in hp over the stock 1.6 rockers, and about 25 ft. lbs.
For a few people that I have sold these to, and hadn't received a big enough performance gain, it was found their trucks had issues that were causing the lower than expected increases (one had plugged cats, the other had a fuel injector sync issue-- off just a hair). Once corrected, all was good.
Sam
RTDKOTA
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R/T Superbee
Dodge Dakota
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11/30/2002
13:49:58
| RE: rockers? which are better
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No I did not test at track or on dyno yet. Don't get me wronge I felt the differance, it starts at about 2,500 rpm (so do all the other mods though) I guess I was hoping for more power of the line (and maby a slight lope). It just seems that the cam (which includes new 1.6 rr lifters) might have been the better way to go. Plus now if I do the cam I'm not sure I can use the 1.7 lifters (need to check with Crower unless anyone Knows?), and all that money will be wasted.
Other than changing the gearing who knows how to get more power under 2,500 RPM?
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kota on 20s
GenIII
11/30/2002
13:53:53
| RE: rockers? which are better
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the 1.6 and 1.7 rockers use the same lifters, and sam can hook you up with a cam that will run bitchen with your 1.7's
-Eric
Injection is nice, but i'd rather be blown.
5.2L, 5speed. Powerdyne SC, 50mm TB, 2bbl M-1, 1.7RR's, MSD 6BTM, ceramic JBA headers, 3
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R/T Superbee
Dodge Dakota
JOIN HERE
11/30/2002
14:01:36
| RE: rockers? which are better
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Sam who?
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kota on 20s
GenIII
11/30/2002
14:04:03
| RE: rockers? which are better
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the guy who asked "what kind of performance did you expect?" AKA RTDKOTA
-Eric
Injection is nice, but i'd rather be blown.
5.2L, 5speed. Powerdyne SC, 50mm TB, 2bbl M-1, 1.7RR's, MSD 6BTM, ceramic JBA headers, 3
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rtdkota
R/T
11/30/2002
14:09:30
| RE: rockers? which are better
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Message:
The mopar cam you are referring to, the 1.7s give as much or more-- it's a pretty mild cam. I can get you a cam that'll work with your 1.7s quite nicely. Works on stock or 1.92 RT heads-- designed around low rpm, good low end, great mid-range. Checkout my before and after dyno sheets on www.socaldakota.com/VIDEOS (the *.jpgs are the dyno scans).
Sam
RTDKOTA
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R/T Superbee
Dodge Dakota
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11/30/2002
14:25:17
| RE: rockers? which are better
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Sounds good. Who makes it and How much?
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R/T Superbee
Dodge Dakota
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11/30/2002
14:30:25
| RE: rockers? which are better
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Also, how do you feel about changing the heads? I have the stock R/T heads now. And if so, to what and how much?
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rtdkota
R/T
11/30/2002
16:56:12
| RE: rockers? which are better
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The cam is made by Crower--- custom grind... $280 on a new core (uses 6.95" push rods, same as the rev kit for the 1.7s), or $180 for a regrind (uses 7.0" push rods).
The stock heads on the RT are just stock magnum heads, not RT heads. RT 1.92s with that setup netted me a 290 rwhp vs. 256 hp without.. Torque was up 20 ft. lbs. (all of this on an M1-4bbl.. M1-2bbl is more ideal for this config, and would show higher gains).
RT 1.92 heads run about $1200.00
Sam
RTDKOTA
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R/T Superbee
Dodge Dakota
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11/30/2002
17:09:07
| RE: rockers? which are better
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Thank's Sam. That sounds good, but I'm confused about this M-1 thing. When I look for the M-1 intakes it appears they are for carborated motors, which of course I'm not. That also leads me to another question. Fastman has a pretty cool rebuilt TB, but only up to 53. One of the sites you sent me to shows TB's that are 68, 70 & I think 72 if I recall for only about $100. more. How does a guy know which to get?
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R/T Superbee
Dodge Dakota
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11/30/2002
17:11:26
| RE: rockers? which are better
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Oh, and who makes the R/T 1.92 head, Dodge, Edlebrock?
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rtdkota
R/T
11/30/2002
18:31:54
| RE: rockers? which are better
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M1-4bbl intake, fuel injected is available (that's what I run), and there's a 2bbl-M1 fuel injected. The TBs for the 5.9L are 50, 52-- 55x52 and a BIGGER TB is available for the super duper guys with 408s... The 68-70-72 TBs are for the 4.7L Magnum.
F&B Billet TBs are brand new (not a rebuilt stock ported tb)... 30 day return policy, lifetime warranty.
**We do have a limited number of rebuilt 50mm TBs-- loaners, demos, or TBs that were sent back as part of a 50mm->52mm upgrade offer we had back in August.
Sam
RTDKOTA
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R/T Superbee
Dodge Dakota
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11/30/2002
19:02:54
| RE: rockers? which are better
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In the old days a 4 barrel was far better than a 2 barrel, so if I'm going to replace the manifold and the TB with you, shouldn't I do the 4 barrel (what are the pro's and con's?) and if so what size?
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rtdkota
R/T
11/30/2002
20:14:30
| RE: rockers? which are better
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Just call me-- I'll explain it all.
:)
619-448-5016
Sam
RTDKOTA
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i drive a six
Dodge Dakota
JOIN HERE
11/30/2002
20:37:27
| RE: rockers? which are better
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omg superbee, you really let me down **sob sob sob** mopar mopar mopar mopar no edlbrock this aint the chebby board!
just messin with ya
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