LS1 lifters?!
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LS1 lifters?! So I know that LS7 lifters are currently the stock replacement for LT motors as well as LS motors but does that mean I can run LS1 lifters in my LT1?! The reason I ask is because I just got a basic stock rebuild performed on my bottom end and its taking me forever to get this thing running because of budget. So my buddy told me I could have his stock lifters from his LS1 which could potentially save me money. I already new ones would be preferred but I havent driven my car since august 2008 over just a stock rebuild so I need to save money in any and every way possible. Also, If they do work will I be able to run stock sized pushrods, as I already have a set of hardened ones. Any help is appreciated.
You need to check the push rod length when you get it together. Were those lifters in a motor that went BOOM? How many miles on them? Just remember if you try to cut corners you could pay a big price. If your gona play, your gona pay.
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Well the motor was fine when they were pulled. He was doing his own build with H/C/I/procharger so he replaced his lifters while the motor was apart. And the motor had 50K on it when it was disassembled. How much will that make a difference?! And also if I have to run a different pushrod length then I'll just get a brand new set of lifters as it wont be worth it for me to run some used lifters and have to get another set of pushrods when I already have a set hardened ones that are stock length.....
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Ok so now that I have this lifter thing figured how bout this. I plan on running the impala head gaskets with this setup also for the slight bump in compression. Do I have to change pushrod length for that?! I know the only real way to determine that is to use a PR length checker but maybe somebody who has a similar setup could shed some light before I start putting this thing together this week.
Measure. 
Not every motor is geometrically identical, that's why they make pushrod length checking tools. I see that your heads are ported which probably means they've been resurfaced and/or milled. That in combination with the Impala head gaskets should be more than enough reason for you to measure yourself. Why take a chance?
Not every motor is geometrically identical, that's why they make pushrod length checking tools. I see that your heads are ported which probably means they've been resurfaced and/or milled. That in combination with the Impala head gaskets should be more than enough reason for you to measure yourself. Why take a chance?
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My heads are ported but not milled and have stock combustion chambers. And im asking because already have hardened pushrods that are stock length and if I have to change pushrod length then I guess I wont be running the impala head gaskets. I dont wanna buy the gaskets and install the heads then have to change pushrods so im tryna get an idea right now before I start buying and installing ****. And I already know the only real way to tell is to measure but im just tryna get an idea.......
My heads are ported but not milled and have stock combustion chambers. And im asking because already have hardened pushrods that are stock length and if I have to change pushrod length then I guess I wont be running the impala head gaskets. I dont wanna buy the gaskets and install the heads then have to change pushrods so im tryna get an idea right now before I start buying and installing ****. And I already know the only real way to tell is to measure but im just tryna get an idea.......
See what I'm getting at? To do it right, you have to measure.
As Ramair already said, . . . . . measure.
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Forget about whatever pushrods you have now. You can always sell them. If you want the bump in compression and bump in horsepower with the Impala gaskets, you're going to have to measure and get the right pushrods, and that's fact. That's what every engine builder does - that is a logical step. It just sounds silly to me that you want to use what you have now, but go on to say you're "tryna get an idea right now before I start buying and installing ****."
See what I'm getting at? To do it right, you have to measure.
See what I'm getting at? To do it right, you have to measure.
I'll spell it out for you then. IF YOU DON'T MEASURE YOU WILL NEVER KNOW IF YOU HAVE PROPER VALVETRAIN GEOMETRY. You have two choices.
1.) Use the Impala gaskets. You'll need to put them on, then check for proper pushrod length (BY MEASURING). Your magical pushrods you have now may or may not work. If they aren't the right length, SELL THEM (budget is a concern, right?). Get the right pushrods (a measly $40) and enjoy a few extra ponies from a tighter quench and a bump in compression. AWESOME!!!!!!!!!!!!!!!!!!!!!
2.) Use stock thickness gaskets. Then measure again. Your magical pushrods you have now may or may not be the right length. If they are, hooray! If not, well, don't you wish you went with option 1? You'd be giving up some HP. But at least your super awesome pushrods you have now would have a home.
Apparently an increase in HP isn't worth $40 to you. :facepalm: I give up. It's your build - do what you want. I'll never understand why people come on here asking for advice and then, when they get it, they fight and cry about what's given because it isn't what they want to hear.
1.) Use the Impala gaskets. You'll need to put them on, then check for proper pushrod length (BY MEASURING). Your magical pushrods you have now may or may not work. If they aren't the right length, SELL THEM (budget is a concern, right?). Get the right pushrods (a measly $40) and enjoy a few extra ponies from a tighter quench and a bump in compression. AWESOME!!!!!!!!!!!!!!!!!!!!!
2.) Use stock thickness gaskets. Then measure again. Your magical pushrods you have now may or may not be the right length. If they are, hooray! If not, well, don't you wish you went with option 1? You'd be giving up some HP. But at least your super awesome pushrods you have now would have a home.
Apparently an increase in HP isn't worth $40 to you. :facepalm: I give up. It's your build - do what you want. I'll never understand why people come on here asking for advice and then, when they get it, they fight and cry about what's given because it isn't what they want to hear.
I dont see anything wrong with tryna use what I have especially when im tryna save money on my build and if its not gonna be worth me running the impala head gasket then im gonna run stock gaskets so I can keep my pushrods. Thats why im asking now. Budget is my main concern with this build, I havent driven my car since august of 2008 over a stock rebuild so im tryna use what I have and anything I sell im gonna take a loss on. But I guess im wrong for that?!
Originally Posted by compcams said this
Do not buy pushrods when you buy the cam, lifters, and the rest of the valve train components. As much as we would like to sell you pushrods at this time, nobody can predict ahead of time what length a given engine needs, unless it is bone stock
Last edited by fex77k; May 11, 2010 at 02:18 AM.
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There are several different things that effect the correct pushrod length. So because the STOCK length rods worked for me doesn't mean they'll work for you. I found my correct pushrod length by measuring, using an adjustable pushrod.
One of the things I often read from the camshaft companies is NOT to ASSUME that since a certain length works for one specific application it'll also work for yours.
BOTTOM LINE IS TO MEASURE.
Jake