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This is odd the standard 2148 Hylift lifter are sold as a LS7 lifter just like about every lifter sold for the LS engine. To be honest I don't believe almost all the claims that LS7 lifters are in fact LS7 lifters. I think many would agree it would be doubtful many of the LS7 lifters sold under that name could handle prolonged 7000 rpm or higher (LS7 had a factory 7000 rpm redline) that the stock LS7 engine would have been exposed to in pre production testing from the factory.
The LS7 was high reving but with one important exception it also had lighter 106 lb on seat 310 at .600 lift springs. So no real comparison can be made as many with cams are running to 6800-7000 same rpm as LS7 engine but with MUCH higher spring pressure added into the equation.
That is not the application they were originally intended for.
But perhaps it all doesn't matter as you and many other many have shown it often does work regardless. Its odd to me because, usually an engine builder will over spec all the new parts (bit better parts) in an engine build especially when camming an engine, but here it is an under spec.
An under spec that usually works, but still an under spec.
I just want to add this. I bought the Hy-Lift P/N: 2281S which is the "true" LS version. I guess it more mimics the original LS1 lifters, not the LS7 style. Pretty sure its just the oil feed hole size, position and cutout.
Anyway, I took mine apart to clean and found that every oil hole had a burr on the inside. 16 out of 16. This is the hole on the main body, all the other internal stuff looked fine.
It was pretty thin, covering maybe 1/3 to 1/2 the hole, and I was able to break it off with a paperclip with one push, but I wasn't impressed.
I'm still going to run them I guess, wont be for another month or so probably.
I just had my engine apart and there were lots of burrs inside the block I cleaned off, they had stayed there for 90,000 miles, burrs are malable thin and bend, still not good to have in there but they probably would have stayed where they were.
One of mine wouldn't fit the block but I since then I have been told the engine blocks can vary bit mine is a 99, all I did was cup the lifter in my hand with some fine 800 grit around it & rotated it about ten times and it fit perfectly. I think it was an invisible burr because what I did would not have been sufficient to remove anything from the external diameter so it must have been a protruding burr. I ended up being impressed it was made to such a fine tolerance.
The 2148 SE is the SBC version, nice that you purchased the correct ones, I'd write to Dave at Hylift and tell him about your problem. Let us know how you go with the lifters.
If there are inaccurate tolerances with these lifters (I doubt it) I am a screwed, looks like it's the main reason for there $100 additional cost, re below from there pdf file.
I just want to add this. I bought the Hy-Lift P/N: 2281S which is the "true" LS version. I guess it more mimics the original LS1 lifters, not the LS7 style. Pretty sure its just the oil feed hole size, position and cutout.
Anyway, I took mine apart to clean and found that every oil hole had a burr on the inside. 16 out of 16. This is the hole on the main body, all the other internal stuff looked fine.
It was pretty thin, covering maybe 1/3 to 1/2 the hole, and I was able to break it off with a paperclip with one push, but I wasn't impressed.
I'm still going to run them I guess, wont be for another month or so probably.
Yes I bought the part # A-2148SE a couple months ago for my rebuild. Your #2281S made me wonder if I got the correct lifter.
I had a 2013 year catalog down loaded so I did find the part # A-2281SE for Gm LS 1997-2013 engines.
So I went back to the inter web and found a 2016-2017 year catalog and found the #A-2148 listed for 1999-07 5.3 T ,2002-07 5.3 B ,2005-09 5.3 J
and 2007-2015 5.3, 6.0, 6.2 with De-Activated fuel mgmt
with no mention of the A-2281S
here is the link page 64 for GMC http://toplineauto.com/wp-content/up...on-Catalog.pdf
So maybe the number has been super seeded?
Looks like I will be taking mine part and look for burrs, thanks for the tip.
Last edited by Metalchipper; Jun 13, 2020 at 11:27 PM.
1. Just a side note: I called Jamisonline yesterday and was informed that the recommended preload for the A-2148SE is .040".
2. I mic-ed the Hy-lift dia. at .8426" Std block bore is .843-844" my old 2002 LM7 lifter mic-ed at .8424" at a unworn spot.
So they are .0002" larger than stock, which is fine for me.
The old lifters are loose in the block with the smaller bearing surface, the Hy-lifts have no wobble. The new style lifters have a bearing surface down around the roller pin.
PS I took one apart and did not find any burrs and that was looking though a 30 power microscope.
Last edited by Metalchipper; Jun 13, 2020 at 11:24 PM.
Reason: more stuff
Only geeks, like me, look at car parts with a microscope.👍
I use it at my real job, Look at my home page- in -Social profiles--.
Did not want to post it here for all the world to see--only members.
I have all the work I want right now.
Dave Ewert for Hylift says aim for 0.030 pre load with the 2148 SE, everything except my rockers was new with mine and it still varied from 0.025 to 0.045 when I aimed at 0.030. I glad I took my time I came so close to ordering the wrong length pushrods.
Dave Ewert for Hylift says aim for 0.030 pre load with the 2148 SE, everything except my rockers was new with mine and it still varied from 0.025 to 0.045 when I aimed at 0.030. I glad I took my time I came so close to ordering the wrong length pushrods.
OK thanks, He should know so that is what I will aim for.
Last edited by Metalchipper; Jun 14, 2020 at 08:01 AM.
I use it at my real job, Look at my home page- in -Social profiles--.
Did not want to post it here for all the world to see--only members.
I have all the work I want right now.
Very interesting.
I worked in micro electronics. When the company upgraded their microscopes, they gave away the old ones. Still good stuff. So I grabbed a Bausch and Lomb stereo zoom 7. I use it frequently. Old eyes need help!
Yes I bought the part # A-2148SE a couple months ago for my rebuild. Your #2281S made me wonder if I got the correct lifter.
I had a 2013 year catalog down loaded so I did find the part # A-2281SE for Gm LS 1997-2013 engines.
So I went back to the inter web and found a 2016-2017 year catalog and found the #A-2148 listed for 1999-07 5.3 T ,2002-07 5.3 B ,2005-09 5.3 J
and 2007-2015 5.3, 6.0, 6.2 with De-Activated fuel mgmt
with no mention of the A-2281S
here is the link page 64 for GMC http://toplineauto.com/wp-content/up...on-Catalog.pdf
So maybe the number has been super seeded?
Looks like I will be taking mine part and look for burrs, thanks for the tip.
No the number has not been superseded they t are diffrent lifters both for LS engines the 2281 cost them a little more to manufacturer .. If you have the 2281S it's a slow leak down and a good lifter I would run them . Take a look at images below !
Another Email to Dave from me (with permission) and reply (my dual PAC springs have 160 lbs seat pressure)
I have some 2148 already I may have to sell those, I'm curious what would happen if I used them instead of the 2148SE? I decided on and purchasing at bit milder camshaft now, I wont be reving past 6500 rpm with same .585 lift and same 392 lbs/in rate dual PAC springs as before in my LS1.
Reply Quote from Dave at Hylift Topline
Hello Tim,
I understand what you are saying. As long as your seat spring pressure isn’t above 130 lbs & you don’t over rev beyond 6500 rpm our 2148 will work just fine.
If either are exceded you will collapse lifters in the stuck down position.
Thanks & best of luck with your engine
Dave Ewet
and (both lifters have forged steel bodies)
The flood gates been lifted in the last few days with good information for those considering to use Hylift lifters thanks for posting all info and your experience on the topic !
No the number has not been superseded they t are diffrent lifters both for LS engines the 2281 cost them a little more to manufacturer .. If you have the 2281S it's a slow leak down and a good lifter I would run them . Take a look at images below !
OK I stand corrected, sorry I blew up! I did now do a search--again and did find the 2281 lifter for sale. Looks like a better lifter with more bore surface area.
Funny that they do not list them in their catalogue. So it looks like the A-2148SE is up one better than the A-2148 [not slow leak] and the HY-2281SE would be the best. And the "E" stands for a little hole for the roller pin lube. Live and learn!
So what do you think about the A-2148SE for a good LS7 type replacement not going in a high performance motor. A mild cam with .560" lift?
Very interesting.
I worked in micro electronics. When the company upgraded their microscopes, they gave away the old ones. Still good stuff. So I grabbed a Bausch and Lomb stereo zoom 7. I use it frequently. Old eyes need help!
YUP about the OLD eyes, When I look at what I did 30 years ago with just a visor----there is no way I could come close today with out a scope.
Thanks
Quote
The flood gates been lifted in the last few days with good information for those considering to use Hylift lifters thanks for posting all info and your experience on the topic !
Thanks that's nice you, thanks for your picks I'm surprised at how many versions they make, there is also 2148 S (just slow leak down) and a 2148 SE (slow leak down and direct shot oiling)
It appears these should be the go to lifter for performance mods on the LS engines not the typical LS7 lifter, they don't cost that much more compaired to buying cam and springs and it eradicates any potential week link in the valve train. It would be nice if a few more who used them could post their results on here.
I don't know much about Morel lifters but I heard they don't recommend over 6500 rpm for those perhaps someone could chime in?
Hi Ron, 8000 rpm that is impressive.
The 2148 SE is cheaper from what I've seen like a lot of SBC parts and I was trying to save every cent due to our terrible exchange rate from USA to Australia.
I did also ask about that here is his reply.
Hello Tim,
Sorry for the delay as we were on Thanksgiving holiday. Yes, the 2148SE will work perfectly in your LS engine. The only difference between the 2281SE & 2148SE is where the oil hole is located .
Hope this information helps & good luck with your rebuild.
( little confusing about the 2281SE being listed as LS specific. I’m wondering why Dave E wouldn’t have recommended that over the 2148SE? ). ........
" You can't sell out of an empty wheelbarrow" he probably didn't recommend them because they have sold out 2281se for some time now .But you can find them from couple vendors on eBay currently listed $270
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