Pushrod length

**Goldcuffs** · 12-06-2009, 05:04 PM

I'm using a TSP 224R. I'm pretty sure I need 7.400 pushrods but not positive. Can someone confirm?

**Hi-Po** · 12-06-2009, 05:08 PM

Yea, 7.4 should be right. Doesnt hurt to check though.

**Mr. Luos** · 12-06-2009, 05:13 PM

What heads?
What lifters?
What rockers?

No matter what....CHECK!

**Goldcuffs** · 12-06-2009, 05:34 PM

Originally Posted by Mr. Luos

What heads?
What lifters?
What rockers?

No matter what....CHECK!

Stock heads, stock lifters, stock rockers.

**JaycenK** · 12-06-2009, 06:45 PM

You can buy a pushrod length checker for a couple of bucks at a parts store.

**oneBADDz** · 12-06-2009, 07:28 PM

It's best to check,I have seen them range from 7.375 to 7.425 on even stock setups. 7.400 will function, but pushrods not being perfect really contributes to what is so well known as the LS1 sewing machine sound

**Hi-Po** · 12-06-2009, 07:40 PM

The base circle of that cam shaft should be stock size. But a pushrod length checker is so cheap, it would be foolish not to check real quick.

**mark21742** · 12-08-2009, 12:29 AM

Originally Posted by JaycenK

You can buy a pushrod length checker for a couple of bucks at a parts store.

I just got one from Summit Racing for $11.99....its worth it

**shady milkman** · 12-08-2009, 05:07 AM

Originally Posted by Hi-Po

The base circle of that cam shaft should be stock size. But a pushrod length checker is so cheap, it would be foolish not to check real quick.

i would be surprised if it wasn't to tell you the truth

**Mr. Luos** · 12-08-2009, 09:42 AM

Most aftermarket cams (a few years ago anyways) had a slightly smaller base circle than stock, so you wanted a 7.425" pushrod instead of the stock length.

This is why you ALWAYS check.

**SOMbitch** · 12-08-2009, 09:45 AM

I measured my stockers when they came out and they were 7.385......

**oneBADDz** · 12-08-2009, 03:17 PM

Technically the stockers are 7.325, they aren't measured in actual tip to tip length.

LS7 lifters sit taller because of the internals too, so they require shorter ones than if you don't change the lifters. I just put stock height L92 heads on an LS2 with stock gaskets and LS7 lifters and it needed 7.375. Virtually stock valvetrain noise, not the "typical" sewing machine sound at all.

**mark21742** · 12-08-2009, 04:53 PM

Originally Posted by oneBADDz

Technically the stockers are 7.325, they aren't measured in actual tip to tip length.

LS7 lifters sit taller because of the internals too, so they require shorter ones than if you don't change the lifters. I just put stock height L92 heads on an LS2 with stock gaskets and LS7 lifters and it needed 7.375. Virtually stock valvetrain noise, not the "typical" sewing machine sound at all.

makes me wonder what size pushrods i'll need with milled heads and ls7 lifters.

I have the pushrod checker sitting on the table. just screw/unscrew to the right lenght, then measure tip to tip for the lenght I take it?

**Goldcuffs** · 12-08-2009, 05:18 PM

Is there a gauge or a read out of some kind on the length checker or do I need to buy something to measure the length checker? Also when I measure I want the rocker to ride as close to the center of the stem as possible, correct?

**Mr. Luos** · 12-08-2009, 05:26 PM

I have one.
Kinda a pain in the ass to use, but it is worth its weight in gold.

You want to make sure it is right.
I have 7.325" pushrods in my motor. Stock style heads milled .020", TSP LS1 cam, Morel/Lunati lifters, cometic .045" head gaskets.

There are so many variables, just check it.
http://www.hardcorels1.com/vbulletin...read.php?t=622

**Goldcuffs** · 12-08-2009, 05:33 PM

Originally Posted by Mr. Luos

I have one.
Kinda a pain in the ass to use, but it is worth its weight in gold.

You want to make sure it is right.
I have 7.325" pushrods in my motor. Stock style heads milled .020", TSP LS1 cam, Morel/Lunati lifters, cometic .045" head gaskets.

There are so many variables, just check it.
http://www.hardcorels1.com/vbulletin...read.php?t=622

Will do, Thanks.