Johnson 2116 Lifter Question
I agree and basically told the Johnson guy that what he was telling me was nuts. Their preload + - of only .005 is damn near impossible to truly hit given what we are dealing with and all the variables. On top of that I told him I bought the lifters used and it melted his brain. He told me the tolerances in the lifter are so tight that even a human hair getting into it could stick the plunger or limit flow. I told him that even if I bought new I could easily open the package and leave it in the garage for dust/hair to get into and that they shouldn't design parts that can only be correctly used with installed in a HEPA filtered NASA clean room. I think their expectations were a bit far fetched given most of us are just guys doing this **** in our garage.
of my previous written number.
3/4 of a turn is "roughly" .060 so theoretically 1 turn is .080. You can get much more precise than thay but youll never get that precision from a std pushrod. Usually its .025 increments. Unless you custom order of course. But then every pushrod from any manufacturer will be different by just a little if youre getting just a swedged end 1 piece plus every manufacturer is different.
Sometimes you can overthink and try to be too precise and sometimes you also get tunnel vision.
Keep it simple. Iirc Johnson likes to run .030 but ive heard of guys running 7.400s on them without measuring so unknown preload.
Thats really why i like the morels a bit better also. Plus they use the larger roller size and even a bushed axle on some like the isky. Johnson has 2 tie bars. Axle oiling and reg. .700 wheel. And mostly captured roller. Both will do the job, but the morel are getting overlooked due to the virality of the Johnsons on social media builds.
Sometimes you can overthink and try to be too precise and sometimes you also get tunnel vision.
Keep it simple. Iirc Johnson likes to run .030 but ive heard of guys running 7.400s on them without measuring so unknown preload.
Thats really why i like the morels a bit better also. Plus they use the larger roller size and even a bushed axle on some like the isky. Johnson has 2 tie bars. Axle oiling and reg. .700 wheel. And mostly captured roller. Both will do the job, but the morel are getting overlooked due to the virality of the Johnsons on social media builds.
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Looking at all the LS engine specs on Summit's site, I noticed all pushrods are listed at 7.385, rather than the 7.400 we are used to hearing. I have heard there are different methods of measuring pushrod length. Is that what we are seeing here?
Ive measured 7.3990 mostly. Or basically 3 C hairs from 7.400. They are made in such huge batches their quality control is ran from a huge number so its not the best.
7.385 seems a little short to me. Ill measure a few sets i have this weekend and see
7.385 seems a little short to me. Ill measure a few sets i have this weekend and see
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TECH Senior Member
Joined: Jun 2016
Posts: 22,298
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From: Central Cal.
Originally Posted by patSS/00
7.385 is close to the "gauge" length, to use the Comp measuring system. 7.4 would be the overall length, what you'd measure with a caliper. The difference is supposed to be about .017.
Ok but my point is still this -- comp 7.400 are approx .015 longer than stock assuming you measure them the same way.
I measured yesterday - again - to compare.
Stock pullouts 7.393. Comp 7.4 were 7.408. Both with the same caliper.
I measured yesterday - again - to compare.
Stock pullouts 7.393. Comp 7.4 were 7.408. Both with the same caliper.