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Best 1.8 rocker arms?

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Old Jul 21, 2013 | 12:17 PM
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Default Best 1.8 rocker arms?
Looking to buy some 1.8 rocker arms and just curious as to what real world experiences folks have had with the different manufacturers.
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Old Jul 21, 2013 | 01:11 PM
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Goin on a daily driver so long term reliability is a must
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Old Jul 21, 2013 | 01:16 PM
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I've ran Harland Sharp's for years. If you use them don't run alot of spring though. Stick with beehives.
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Old Jul 21, 2013 | 01:27 PM
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The springs im running are the gm beehives for the asa cam
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Old Jul 21, 2013 | 01:35 PM
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What will your lift be with the 1.8's. I have turned that spring 7000 with a 1.7 HS rocker and the ls6 cam. My ls6 has lighter valves though.
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Old Jul 21, 2013 | 01:36 PM
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Higher ratio rocker arms are for people who don't want to change cam, the lift gains are minimal when compared to lift picked up with a cam...I dot think the ASA cam has very drastic ramp rates, but valve train stability becomes concern when running higher ratio rocker with an aftermarket cam...

All that being said if your dead set on the higher ratio rockers SLP makes a 1.85 ratio designed to mimic the investment cast factory rockers which are nice and you don't have the hassle of adjusting roller rockers for a good wipe pattern...anyway good luck on the project
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Old Jul 21, 2013 | 01:46 PM
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I have 1.8's and psi valvespring on my car now with the stock ls6 cam. I just bolted the rockers on. No adjustment needed.

I can post a dyno graph of a back to back on 1.7 to the 1.8's if you like.
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Old Jul 21, 2013 | 01:51 PM
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I wouldn't doubt it added power, the stability is my concern, but again you have a GM cam with ramps that aren't very aggressive, try 1.8s on an aggressive cam...
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Old Jul 21, 2013 | 01:56 PM
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I mainly said the dyno sheet thing so op could see some results of the rocker swap. I'm sure a aggressive cam could change someones combo. But there are some ls7's out there with some pretty aggressive cams. They come with 1.8 rockers.
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Old Jul 21, 2013 | 02:24 PM
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Sure id like to see the dyno sheet
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Old Jul 21, 2013 | 02:25 PM
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I know im only looking at about .030 lift increase but um saving the cam swap for when I install my ported heads so just a little something until then
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Old Jul 21, 2013 | 02:29 PM
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Ill be goin to psi springs when I do the cam swap thats all we ran on every 24 hour engine, pro stock harley engine and nationwide engine we built and never had one issue. Very good springs
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Old Jul 21, 2013 | 02:30 PM
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With psi 1511 springs ,asa cam ill still be able to use the 1.8 rockers due to the slower ramp speed of the asa cam
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Old Jul 21, 2013 | 02:42 PM
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Originally Posted by Black00SS/65SS
Sure id like to see the dyno sheet
Here ya go. Had some pretty good gains threw the middle.

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Old Jul 21, 2013 | 02:49 PM
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Thanks man those are some good curves really like the tq one.. what cam do you run?
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Old Jul 21, 2013 | 02:51 PM
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It's a stock crate ls6 with bolt-ons and these rockers. Stock cam and all. Keep in mind these numbers are about 3.5% low compared to a dynojet dyno.
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Old Jul 21, 2013 | 02:57 PM
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Very nice ..how much did your pushrod length change?
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Old Jul 21, 2013 | 03:02 PM
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None.
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Old Jul 21, 2013 | 03:16 PM
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Preload was still good? So are you running the sharps now?
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Old Jul 21, 2013 | 03:21 PM
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So it was a ~5hp gain? The rockers cost the same as a cam...
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