The V8 Owners Forum -

can anyone tell me what rate standard and double valve springs are?

did some tests on a standard one here and it seemed to be about 180LB or 3.33 kg/mm

280 pound rings a bell for doubles?


Ralph

surely just the fact that its a finer thread on top makes a big difference to the torque required for a given force??


Ralph

in the arp head stud torque thread above its mentioned that theres a fair chance of pulling a thread or 2 from the block, do the arp bolts put more force on it? i guess the finer thread will put more force down for a given torque, what torque are the standard bolts rated to? i presume they dont usua...

i havent had a chance to inspect it yet but i assume so, it was rusty as f**k on the back and is water colour inside.

i think alloy ones would be a very good idea.


Ralph

WIN

dont ask why it will make you laugh at me lol.


Ralph

ChrisJC wrote: but I have tried to remove them in the past and failed dismally!

that sounds like a challenge, yea i will probably fail to lol.


Ralph

yeah heats a dam good idea, and failing that a socket type allen key bit.

anyone know why they are there? im guessing its to do with the casting needing extra holes?


Ralph

What are the 2 plugs which are screwed in tot he heads? do they just blank off a hole in to the water way??

tried removing them from a head but they where very tight.


Ralph

Chris, i found that in one of your previous posts, was very useful,

only way i would effect how close the head is to the piston would be to run tin gaskets, however i think its easiest just to skim them more, going to take them down after work.


Ralph

well i have had a close measure up and compared mine to a diagram i found on here showing how high the heads should be, mine are on average 0.55mm bigger, which i think adds up well to them being tin type with a skim. i think my best option is get them skimmed by say 0.8mm, and run a 1mm comp gasket...

well im trying to get it back to original CR or maybe a little more, so if i was to fit tin gaskets or skim it i would be coming back to close to original preload, if i skim them then they would be original. i am fitting a different cam and probably rhoads lifters if that makes any difference. cheer...

oh no a 3rd option! lol, are there tin gaskets available for the 4.6?

good to know about the balance thing.


Ralph

Bit of a dilema here, had my ported heads skimmed/tested/valves recut, then found they are tin gasket heads so the compression will be to low, 2 obvious choices, either fit 4.0 pistons or skim them down to the right thickness and more as i would like slightly higher compression, i really dont want t...

if you could that would be great, last year they took a screen print of another forum, they are being more stringent this year.

cheers
Ralph

i have paid, if you can sort me out that would be great, i did mention the V8 forum, but they said i needed a card for the club?

hopefully they will be ok.


Ralph