I have the JWT cams but stock valve springs - at the time I installed them didn't know there was a JWT valve spring set

Just curious what the labor involved would be. I'm going to be taking off my intake manifold and redoing the fuel system anyway so was curious if this was a major job or not

 

W/ the proper tools I believe it's a 12-16 hour billable job.

 

eh crap, so it takes longer to do that then to switch out the cams by themselves?

oh well thanks

guess i'm not doing that then

 

This is a huge pain to do on a bench. I can only imagine the aggrevation of doing this with the heads still in the car. 12hours is probably pretty close. All the accesories and timing gear have to come off. It would really be easier to drop the motor and pull the heads.

Don't bother....

 

Why do you want to change the springs? Your not going to get power and you dont need them. they are only for high revving, and the engine would need to be ported/polished and balanced to make power above its 6200 hp peak.

 

i make power above 6200 with my mods. My peak power is around 6900ish

It'll be even a little higher when I get the SSV manifold put on

 

Do you have to pull the head to swap cams or is there enough clearance to slide them out the front?

I pulled the head and swapped the cam, valve springs and retainers on my old e30 bimmer and it sucked. I can't imagine attempting to swap springs and retainers with the head on a car. It would really suck to drop a valve into a cylinder

But if the cams just slide out and the install is relatively easy on a VQ, I think I might consider DIY on my Z. From what I've found so far it sounds like most of the labor is in disassembling all of the "stuff" from the engine.

How does a cammed Z drive? I put a pretty aggressive 288 cam in my e30 and it was a pretty noticeable change and you could really feel it when it came "on the cam" it was like VTEC on steroids. Lumpy idle (I thought it was cool, heh) but never stalled on me once.