Valve springs pressure?

General Engine Discussion

Moderator: John_Heard

Post Reply
Message
Author
68Z
Posts: 34
Joined: Thu Dec 04, 2008 2:22 pm
Location: Winnipeg,Manitoba,Canada

Valve springs pressure?

#1 Post by 68Z » Fri Dec 07, 2012 8:51 am

Just checked the seat pressures last night with LMS on head tester.
Now I have 2 questions!
1- how close is the reading compared to the bench tester?
2- what kind of margin is OK. The installed pressure is 350 on the seat out of the box. I have some that are down to 320 after 6 dyno pulls!
The springs are a PAC 1358 installed @ 2.100
Thanks!
Trev

I think that is on the low side!
68 Camaro Z/28
302 4spd
12.31@114mph
Top
68Z
Posts: 34
Joined: Thu Dec 04, 2008 2:22 pm
Location: Winnipeg,Manitoba,Canada

Re: Valve springs pressure?

#2 Post by 68Z » Fri Dec 14, 2012 3:12 pm

What no one has a answer! :(
68 Camaro Z/28
302 4spd
12.31@114mph
Top
User avatar
Hitchcock
Posts: 1535
Joined: Fri Sep 12, 2008 6:57 pm
Location: Wichita

Re: Valve springs pressure?

#3 Post by Hitchcock » Mon Jan 07, 2013 6:43 am

What does the manufacturer say about tolerances? It does not sound like a lot, but after only 6 pulls. How much lift is the cam?
73 Vette, moly back half
Pump gas 496
Two Pro Systems 950's
Chance 6000 converter
Top
Post Reply

Return to “Engine”

Who is online

Users browsing this forum: No registered users and 14 guests