Jun Cmashaft Kit Reviews.

[khezz]

Hi all

I am looking at buying a JUN cmashaft kit which comes with heavy duty valve springs and titanium retainers. I am leaning towards the 272/9.7mm on both sides. Does any one know much about these kits? They are listed as a "JUN Stage 2R Camshaft Kit" on a few of the online shops. The reason I looked at them is because the duration and lift is ideal for the power I am chasing and it seems to be good value to.

I know JUN in general are top notch with there gear. But any reviews or "I heard from a friend" would be great. Thank you.

[Spoolup]

I believe a lot of Jun cams run a smaller base circle than std size. This means you need to buy there shim kit also to make up the difference.

[CruiseLiner]

the jun 272/11.35mm lift ones i got run smaller base circles and do require thicker shims to be made up. i got my shims custom made by precision shims australia

shims cost $195 i think from memory for the 24

EDIT: the 272/9.7 lift have stock base circle so they are fine with stock shims..

http://www.junauto.co.jp/products/cylinder...ft-rb26.html?en

the BC in the chart is the base circle

Edited September 14, 2006 by CruiseLiner

[700HP-GTR33]

Whats the kit worth?

I also am in the hunt for

And have you looked at the Tomie poncams 260 with 9.15 lift.

What power levels are the Jun ones you are looking at, at?

On the Poncams there is no need for heavier springs or retainers...so they say.

But price and supporting mods are also important when it comes to bolt ons.

Cheers

[khezz]

The price works out to be about $2200 landed to your door step for the kit. So it is good value. From what I have read they should drop straight in. For now I am chasing around 550hp at the wheels and my cut of is set to 9200rpm. I had a long chat with my local head tech. For my purpose he said to use about 270 duration and no more than 10mm lift. That way the engine will breath very well, still idle and perform well at lower revs and i dont need to spend money on the head. Just a general cleanup is all that needed. Any more lift and you need to start looking a major headwork.

[Sydneykid]

No matter what duration and lift cams you use, RB26 cylinder heads ALWAYS need work. The combustion chamber volumes are never equal, the ports always flow differently and they are undersized (particularly) the exhaust ports.

So don’t let the need for headwork limit your choices, you should do it anyway.

cheers