FransLZ33

so I want to upgrade to the tomei 272 cams, i know I have to upgrade the valve train also but what is everything I need to do to make them work?

dnash

iTrader: (3)

If you are thinking of the 272 hi lift cams(11.3, 11mm lift), Tomei recommends 1mm deeper valve reliefs in your pistons. The 10.8mm lift cams ahould be good. You'll need better valve springs. If you are able, use the OEM valve retainers. They are forged aluminum and lighter than Ti retainers. If you need to swap lifters, look into getting the DLC lifters for a little less friction (the DE lifters are perfectly fine though if they are in spec).

FransLZ33

well I was ganna go with the 10.5 I believe they have and are you sure I do t need to swap retainers? I was just ganna upgrade the whole valve train

dnash

iTrader: (3)

There is no sense wasting good money. Pick up a set of vq35HR valve springs and use the stock retainers. What other mods do you have or plan to have?

FransLZ33

Well I just got done talking to my friend and we might end up just doing forged internals along with the cams so saying that I might as well upgrade the full valvetrain right?

dnash

iTrader: (3)

If you got the cash, by all means.

FransLZ33

tax return helps lol and I wldnt mind saving up the extra cash to do a full build super excited tho with what ever I go with

RobPhoboS

dnash:

Just out of curiosity, I was considering the JWT S1 cams, they are 10.87mm EX/IN, so I presume I'd be ok (2004 Z) + the springs.
Also just so I can look, what specific cams are the Tomei ones as they seem to have many.

FransLZ33

I was looking at their 272 10.5 in.ex cams and I've heard any of their cams bigger than 264 they reccomend their valve spring kit

RobPhoboS

Yup I'd be doing that regardless, I'm just looking to know if that's all that is required without other problems

FransLZ33

As far as I've seen just springs and retainers

KA24DE

JWT makes a better grind than Tomei does, I would talk to them first.

RobPhoboS

What about Brian Crower ?

Specs:
Adv. duration: 264 in / 264 ex
Dur @ 0.050 : 222 in/ 222 ex
Lift (in) : 0.426"/ 0.426"
Lift (mm): 10.82/ 10.82

Looks comparable to the JWT S1 set, so for me it's either the BC's or JWT.

The JWT C2 set probably have a bit too much lift for the stock pistons I guess (11.58mm).


Oh, and the spring kits - I'm not sure which to get:
https://www.z1motorsports.com/engine...it-p-2139.html

https://www.z1motorsports.com/engine...it-p-5173.html