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So I was hearing that you need different length pushrods when upgrading to the LS7 lifters. I have 243 heads going on to a Ls1 and they have been resurfaced. To go along I am upgrading to ls7 lifters. What length pushrods would be the best? Thanks any help is appreciated!
No. Take the same amount you took from the head from the pushrod length. If it was only a few thousandths, it should be OK.
The best way to know is to actually measure for the length.
LS7 lifter is slightly longer at rest than LS1 lifter but it also allows for more travel and thats why its a direct replacement. But as mentioned its still best to check length in order to optimize preload.
Im finding you have excellent reports on the Johnson 2110s which seem really good but at about 4-5x the cost of a set of Delphi LS7s for me anyway (outside US).
I'm still a bit unsure if anything between that price range, say Comp 850-16s or Morel 5315s really offer anything over the LS7s for the added expense.
For not much more than some of some of the expensive OEM style lifters I can get Morel 5290s or rebranded versions of it which once again I hear mixed opinions on.
I feel like I've turned my car to 7200 for long enough on the factory lifters, surely any of them would do the trick including the LS7s - but a couple of hundred dollars is neither here nor there for a higher quality lifter, especially if it lessens valve train noise which I hate lol.
The ls7 lifter cup is .05 higher than the ls1, this is well documented in some older threads. The preload is about .02 more so that makes up almost half the difference. There's also the gen V lifters sold by BTR and I don't know who else, that as far as I can tell is really the exact LS1 lifter with a different name, but there's almost no info out there about those.
The comp 850s are ls7 lifters.
The morel 5315/6504 are a great replacement and you can run at .050/.060 preload
The Johnson are a fully machined lifter hence the price. They use .030 preload so always measure.
For reference about ls7s being used on high hp builds, Leroy ran a 7.80 on ls7 lifters at over 1100hp and considerably less oil pressure than anyone knows. They aren't THAT bad.
For reference about ls7s being used on high hp builds, Leroy ran a 7.80 on ls7 lifters at over 1100hp and considerably less oil pressure than anyone knows. They aren't THAT bad.
Obviously I have way less power but mine have been flawless here.
Aggressive cam, 7100 shift points and absolutley **** pound my car on the street, road course and track.
Also a 4400 stall meaning my car lives between 6400- 7100 rpms
Which cam are you running and what is your intended use for the vehicle?
my stuff is all stock at the moment but down the road I'd like to get some sort of Stage 2 cam from somewhere.. the car isnt a daily and its usage is for all purpose.. occasional drag strip.. mostly backroads twists and turns and cruising
A friend and I work on our cars together. He has a C5 with Morel Drop Ins 243s decked for clean up, FAST92, CamMotion Titan4(?) 226/230, BTR Double Springs and a Straub Trunnion upgrade. He has run multiple track days at Road Atlanta and Atlanta Motorsports Park without problem.
04-28-2019, 04:10 PM
Pushrod length with LS7 lifters 
