1374lee

iTrader: (11)

As above I am after a set of ISKY double valve springs.Just wondered if anyone else has them fitted?Are they top quality,how much and where can i get a set from please?
What's the difference between these and having the head modified to take these and the double valve springs that need no head modification?
I hope u can help me out.
Many thanks.Lee.

markk

iTrader: (2)

I have a set i may be willing to sell if your interested.

1374lee

iTrader: (11)

Mark,u have a pm.
Thanks.Lee.

Cossie Phil

Hi Lee,

The Isky's allow more cam lift.

Cheers,

Phil.

Buv

Just a thought, my mate bought a nice ported head fitted Isky valve springs and next time we had it off it had started to crack around the valve seats we had it welded took them out, but he wasnt happy.

i bought a nice ported head aswell but the valve spring seats were machined down by about 2mm so the standard springs would be under less pressure, so i put Isky springs in and mines bin ok.

there are two reasons for fitting them, if you a getting valve bounce because you need to rev the engine higher, or you are using very high lift cams the springs would be coil bound so machine the seat down and now they are not strong enough so need uprating.

so i would only put them in if you have a good reason.

hope this helps

tabetha

As above ONLY use if needed, offer no advantage whatsoever when not needed, I manage 7500 rpm on std springs, hard cut set at this.
tabetha

joffy

iTrader: (1)

Think MSD do a double springs that fit a standard head without needing modifying

1374lee

iTrader: (11)

Buv and Tab,u both have pms.
Many thanks.Lee.

tabetha

You can indeed buy double springs easy enough that need no fitting, but speak to KEN, at Newman.
tabetha

Stu @ M Developments

iTrader: (12)

These are what you need mate.

J1mbo

iTrader: (1)

your mate needed to drop the platforms in the head because yours was done they were fine

Buv

Yea.. it was 12 years ago we were a bit green.

The logic was sound though every Cossie we had the head off had valve marks in the pistons, they must have been touching at some point. Uprated springs seemed like a good idea at the time.

I think the moral of the story is know the combined poundage of the springs are correct for the chosen spec of the head, beacause it is possible to have to much.

He sold the car ages ago, he has one of those Japanese thingy me jigs now... vevo... or somthing, but he was still moaning about that head last week.