Merc 900 valve Springs and lifters

Reply Subscribe

Thread Tools

03-11-2017, 09:09 PM

#11

getrdunn

Registered

iTrader: (7)

Join Date: Feb 2009

Location: NW Michigan

Posts: 8,302

Likes: 1,177

Received 1,493 Likes on 807 Posts

Quote:

Originally Posted by getrdunn

Makes no sense I know but pm me your ph number and I will tx you cam card.

Sent card via tx!

03-11-2017, 09:28 PM

#12

getrdunn

Registered

iTrader: (7)

Join Date: Feb 2009

Location: NW Michigan

Posts: 8,302

Likes: 1,177

Received 1,493 Likes on 807 Posts

Sutphen 30 I think is who uses the bullet replacement cam. Will be interesting to see if he chimes in also. Those springs that are on card seem like the same ones on 741 hyd roller cam.

03-11-2017, 11:20 PM

#13

I'CE

Registered

Join Date: Oct 2008

Posts: 1,320

Likes: 549

Received 74 Likes on 40 Posts

Quote:

Originally Posted by getrdunn

Which comp springs? I only did a quick search but couldn't find any comps similar to the recommended crane spring #99876.

160 closed @ 1.968
468 open @ 1.348

Seems pretty light pressures for that cam but it's what the card shows.

change the installed height to 1.88 or even 1.90 and those pressures will bump up, but as jd said still seems light

03-11-2017, 11:21 PM

#14

Unlimited jd

Registered

Thread Starter

iTrader: (5)

Join Date: Jul 2009

Location: Taunton Ma

Posts: 8,527

Likes: 449

Received 698 Likes on 341 Posts

These will go back pretty much 100% stock, they have 82 untouched hours now. Still have merc seals. If upgrades are going to be made these will be sold and a couple whipped 557's will replace them.

03-11-2017, 11:21 PM

#15

Unlimited jd

Registered

Thread Starter

iTrader: (5)

Join Date: Jul 2009

Location: Taunton Ma

Posts: 8,527

Likes: 449

Received 698 Likes on 341 Posts

Quote:

Originally Posted by I'CE

change the installed height to 1.88 or even 1.90 and those pressures will bump up, but as jd said still seems light

I'll have to look at specs but 1.88 will bind
Just checked, bind is at 1.200, with .672 lift too close for my liking even after lash

Last edited by Unlimited jd; 03-11-2017 at 11:26 PM.

03-12-2017, 10:48 AM

#16

JJ30

Registered

Join Date: Jun 2012

Posts: 164

Likes: 2

Received 9 Likes on 5 Posts

Quote:

Originally Posted by getrdunn

I have 2 sets of springs, retainers,seals and keepers at work. I'll post the part numbers tomorrow.

03-12-2017, 10:53 AM

#17

sutphen 30

Registered

Join Date: Jan 2006

Location: taxachusetts

Posts: 3,094

Likes: 537

Received 700 Likes on 354 Posts

Quote:

Originally Posted by getrdunn

Sutphen 30 I think is who uses the bullet replacement cam. Will be interesting to see if he chimes in also. Those springs that are on card seem like the same ones on 741 hyd roller cam.

we used pac springs w/ a seat pressure of 225lbs.

03-12-2017, 11:06 AM

#18

getrdunn

Registered

iTrader: (7)

Join Date: Feb 2009

Location: NW Michigan

Posts: 8,302

Likes: 1,177

Received 1,493 Likes on 807 Posts

Quote:

Originally Posted by sutphen 30

we used pac springs w/ a seat pressure of 225lbs.

Sounds more realistic. Why would crane have 99876 on the cam card I wonder. Makes no sense unless it's an errror. I big one though. Comp 943 would sound much closer. Will be interesting to see what jj30 has for his.