ShevrolayZ28

iTrader: (4)

I'm trying to get an idea of what length pushrods I will need for H/C purchase. Thanks!

Moparnos (The SLP Guy)

iTrader: (55)

use a pushrod checker to accuratly measure for them. but i believe the morels are .030 taller.

ShevrolayZ28

iTrader: (4)

Thanks! That info will get me in the ball park. I do plan on measuring with a pushrod length checker.

Now if only I could find a place that has the Morel lifters in stock.....

vettenuts

iTrader: (4)

That's what I measured.

JakeFusion

iTrader: (7)

Plunger depth is the same, but that doesn't matter. The Morels need only .030" preload as opposed to .100" of stock. So the Pushrods will need to be .070" shorter.

Cstraub

iTrader: (1)

Thunder should have them in stock.

vettenuts

iTrader: (4)

I used the short end of a separated adjustable pushrod and measured roller tip to end of pushrod for stock and Morel, the measured distance for the Morel was 0.030" longer. Had nothing to do with preload.

ShevrolayZ28

iTrader: (4)

Unfortunately they are out.

vettenuts

iTrader: (4)

Other option is to try and find the equivalent Lunati lifters. Byunspeed had some a while back.

Cstraub

iTrader: (1)

Thunder should have lifters today or tomorrow.

ShevrolayZ28

iTrader: (4)

Cool! But now I have some more figuring to do....

On paper, with Comp OE lifters, I would have tried 7.40". I guess it would be ~7.10" with the Morels. That doesn't sound like an off-the-shelf pushrod to me. I'm such a newb with this stuff

Cstraub

iTrader: (1)

Pushrod lengths from 6.250 to 10" long in increments of .005" are very common these days.

vettenuts

iTrader: (4)

Not really because your preload will also be different. The lifters will require a shorter pushrod due to their length and then shorter still due to the reduced preload. Best to buy an adjustable pushrod from Thunder when you order the Morels ($20) and measure. It only takes a few minutes and that way you will only order the pushrods once. I did this as one of the first things and the pushrods were at my house before I even needed them.

Viper

iTrader: (6)

If you measure and find out you need 7.325, I've got a set with 100 miles on them. I ended up with 7.300 on my Morels, but the 7.325 was before I measured. And BTW, notice JakeFusion said .070 shorter , not .700. So 7.40 - .070 = 7.330

ShevrolayZ28

iTrader: (4)

I forgot about the lower preload requirment for the Morels.

That was helpful. I'll do it that way; I'll order the pushrod checker, then order the correct length pushrods.

I was going to make a ball park guess and order them at the same time as the other stuff. I'd most likely have guessed wrong and ended up with an extra set. (Especially since I seem to be unable to do simple math.)

Viper, thanks for pointing that out! And I'll keep you in mind if I end up needing 7.325".

Viper

iTrader: (6)

No problem, and if you need a source to sell you an 'odd' size, pm me and I'll let you know who sells in .005 increments.