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ls7 lifter???

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Old Jan 4, 2013 | 07:56 PM
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Default ls7 lifter???
If I get ls7. Lifters do I need to do the triunion upgrade?
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Old Jan 4, 2013 | 08:11 PM
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NO, the trunion upgrade is not a must.
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Old Jan 4, 2013 | 08:17 PM
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Good to know, thanks for the fast response
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Old Jan 4, 2013 | 08:18 PM
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no problem..
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Old Jan 4, 2013 | 11:24 PM
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the comp cams trunnion upgrade? it is a MUST in my book
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Old Jan 4, 2013 | 11:31 PM
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Wouldn't hurt if u can though nice safety measure especially if your pushing high horses
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Old Jan 4, 2013 | 11:35 PM
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I know a lot of people that haven't and they have been good! If you have the cash go for it!
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Old Jan 5, 2013 | 08:09 AM
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Originally Posted by turbonola
If I get ls7. Lifters do I need to do the triunion upgrade?
The two are unrelated. LS7 lifters are nothing special, just the standard GM lifter. The trunnion upgrade addresses the issue with dumping bearings and tightens up clearances in the rollers. However, GM did fix the rocker design later so depending on the year of the rockers the trunnion upgrade may not even be necessary.
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Old Jan 5, 2013 | 12:17 PM
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ls7 lifters here and NO trunion upgrade..been that way for bout seven years H/C/I..not gonna hurt you to upgrade though..at the time when i put the ls7 lifters in no one was doing the trunion upgrade
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Old Jan 5, 2013 | 12:39 PM
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i dont know what yr GM changed the bearing design in the rockers......but when i did my upgrade the stock bearings practically FELL out of the rockers......no wonder they had that problem of shedding bearings into the engine
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Old Jan 5, 2013 | 02:01 PM
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FWIW,

Be sure to check pushrod length after installing the lifters. The pushrod cup depth (where the pushrod sits) is a different height than a ls1 lifter.

Ls1 lifter - higher cup depth
ls7 lifter - lower cup depth
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Old Jan 5, 2013 | 10:01 PM
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Some good information in here. Thanks guys. I do plan on bouching the motor off the rev limiter. It's going in a 240sx just for drifting.
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Old Jan 5, 2013 | 10:29 PM
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The LS7 lifter has a ceramic check ball in it. The stock LS1 has as a steel check ball.
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Old Jan 5, 2013 | 10:34 PM
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So does anyone know what year GM fixed the rocker problem?
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