Comp lifters or stock GM LS7
06-02-2008, 08:02 AM
#1
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Comp lifters or stock GM LS7 Any advantage to running the comp Pro magnums 875-16 vs. the stock GM LS7 12499225 ??
Anyone with bad experiences on the Comps?
Marketing hype aside and that there are only few companies actually making the lifters (and springs) and rebranding.
.610 lift, patriot extreme springs
Anyone with bad experiences on the Comps?
Marketing hype aside and that there are only few companies actually making the lifters (and springs) and rebranding.
.610 lift, patriot extreme springs
06-03-2008, 12:09 AM
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I do not have those lifters, but I can tell you that on a stock engine, there is no advantage switching to comps. Us LS1 guys use LS7 lifters in our high HP applications so needless to say, they are very strong and durable. Keep them in there.
06-03-2008, 05:12 AM
#4
Any advantage to running the comp Pro magnums 875-16 vs. the stock GM LS7 12499225 ??
Anyone with bad experiences on the Comps?
Marketing hype aside and that there are only few companies actually making the lifters (and springs) and rebranding.
.610 lift, patriot extreme springs
Anyone with bad experiences on the Comps?
Marketing hype aside and that there are only few companies actually making the lifters (and springs) and rebranding.
.610 lift, patriot extreme springs
06-03-2008, 08:49 AM
#5
Just to clear up any confusion. The LS7 DOES NOT have a special lifter. The same lifter is used in the LS1, LS2, LS3, LS4, LS6, LS7, L36/67 Buick V6, and a lot of others. Needless to say , the are put in a few million engines per year and work quite well. They actually back service all the way to the 1985 LB4 4.3L V6.
06-05-2008, 04:26 AM
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06-05-2008, 07:42 AM
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the differences are internal:
the roller pin is differant and the plunger retainer is not the same
the changes are suppose to help it perform better at higher rpms
the roller pin is differant and the plunger retainer is not the same
the changes are suppose to help it perform better at higher rpms
06-05-2008, 08:12 AM
#11
Go look up part number 17122490 and see for yourself. Don't guess if you don't know for sure. Go to AC Delco's site and put in HL124, thats the Ac Delco part number, you will see that it has a ton of different vehicles that it is used on.
2008 CHEVROLET CORVETTE Z06 V8 7.0L 7011cc 427cid GAS FI N Engine VIN = E
Qty Req Qty ACDelco Part# Description
ENGINE / LIFTER/TAPPET
16 HL124 LIFTER,VLV
2008 CHEVROLET CORVETTE Z06 V8 7.0L 7011cc 427cid GAS FI N Engine VIN = E
Qty Req Qty ACDelco Part# Description
ENGINE / LIFTER/TAPPET
16 HL124 LIFTER,VLV
06-05-2008, 05:58 PM
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he is right all the same lifter. but GM does make a high rev race lifter. retail for like 400 or something. that is what i am going with. but not retail 
they race lifter is in the new GMPP cataloge. look in there.
but ALL LS MOTORS USE SAME LIFTER.
ls1,2,6,7,9,new LSA, even caddy LS1 cts. all same stock lifter
they race lifter is in the new GMPP cataloge. look in there.
but ALL LS MOTORS USE SAME LIFTER.
ls1,2,6,7,9,new LSA, even caddy LS1 cts. all same stock lifter
06-05-2008, 08:14 PM
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Also consider GM's Cadillac Racing lifters which are good for revs in the 8000-8500 rpm range. These are another option for a stock quality replacement lifter in LS1's and other LSX family motors with some extra assurance that they are durable. The part number is GM PN 88958689.
06-06-2008, 04:56 AM
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Also consider GM's Cadillac Racing lifters which are good for revs in the 8000-8500 rpm range. These are another option for a stock quality replacement lifter in LS1's and other LSX family motors with some extra assurance that they are durable. The part number is GM PN 88958689.
Still dont know how they failed
2 suggestions
I didnt clean them in solvent before I soaked them in oil and my lifter trays were old
But I dont buy any of this, since the car ran over 150 miles on them, with revvs up to the 6900 rpm range multiple times...
06-06-2008, 08:04 AM
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You are correct, currently the part number is what I quoted in the first message of this thread.
LS7 lifter is the same as the other LS motors LS1-6.... BUT that part number has changed from previous years. Whether that is because of change in design or just catalog part number, change in supplier, etc. -- who knows.
Good or bad, better or worse-- probably more financial, supplier consideration for GM, than necessarily a design.
The real question is whether these aftermarket lifters are truly better in design or not compared to the GM?
LS7 lifter is the same as the other LS motors LS1-6.... BUT that part number has changed from previous years. Whether that is because of change in design or just catalog part number, change in supplier, etc. -- who knows.
Good or bad, better or worse-- probably more financial, supplier consideration for GM, than necessarily a design.
The real question is whether these aftermarket lifters are truly better in design or not compared to the GM?
Just to clear up any confusion. The LS7 DOES NOT have a special lifter. The same lifter is used in the LS1, LS2, LS3, LS4, LS6, LS7, L36/67 Buick V6, and a lot of others. Needless to say , the are put in a few million engines per year and work quite well. They actually back service all the way to the 1985 LB4 4.3L V6.
06-06-2008, 10:20 AM
#17
You are correct, currently the part number is what I quoted in the first message of this thread.
LS7 lifter is the same as the other LS motors LS1-6.... BUT that part number has changed from previous years. Whether that is because of change in design or just catalog part number, change in supplier, etc. -- who knows.
Good or bad, better or worse-- probably more financial, supplier consideration for GM, than necessarily a design.
The real question is whether these aftermarket lifters are truly better in design or not compared to the GM?
LS7 lifter is the same as the other LS motors LS1-6.... BUT that part number has changed from previous years. Whether that is because of change in design or just catalog part number, change in supplier, etc. -- who knows.
Good or bad, better or worse-- probably more financial, supplier consideration for GM, than necessarily a design.
The real question is whether these aftermarket lifters are truly better in design or not compared to the GM?
If this is true, why did my car's lifters become so much noisier after switching from ls6 to ls7? I've also heard this over and over again from others.
