well they must have give up on them, But I seen photos of them.
Were the wear pad was there was a roller. I think they had a problem keeping it centered and shifting to one side or another or maybe the pins breaking . ,The guy said need a certain cam profile and was very limited. Maybe given up on them. People getting pissed wiping out their cams,
This was like 5-7 yrs ago when I talked to them.

Ok. Thanks anyway.

Dave

_________________
USA Daily: 2014 Nissan GT-R, very minor modifications for the track
USA Project: 1978 280Z, minor suspension upgrades, VK56DE conversion in progress. SOLD
AUS Race Car: 1973 240Z, L28ET, Autronic, GT35R. SOLD
AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild. SOLD

turbovan,

with valve lift that high does anything special have to be done to get the cam in? apparently retainer-to-cap clearance is an issue?

Dave

_________________
USA Daily: 2014 Nissan GT-R, very minor modifications for the track
USA Project: 1978 280Z, minor suspension upgrades, VK56DE conversion in progress. SOLD
AUS Race Car: 1973 240Z, L28ET, Autronic, GT35R. SOLD
AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild. SOLD

Hilex,
Depending if the cam was a new core or a regrind it will need the correct size lash pads and retainer to fit in there so they dont bounce out. A regrind might need bigger due to the fact they cut the back side of the lobe. A new cam cut might have a bigger base circle so smaller pads will be needed. But compared to stock they all will be bigger. I have a assortement at home 150-200 but they have more up to .340 in my nissan book.

Also they have a spray bar as liek in the later z cars(I think which sparys the oil right on the cam( I think the cam will be plugged on the end)

That cam mention above .590 is abit much. I think .490 would be a better choice. Spring and seat life will be shortened with that .590 cam. But will good part will be fine/ Most people who put stuff like that in will have the motor apart sooner than later.

Yea i had to use thicker lash pads and spent some time getting the rocker geometry just right. It was a new cam not a regrind. There is no dramas with getting it in.

Over the last 3.5 yrs, this engine has done two 5000km round trips from sydney to adelaide for the datnats, two track days at mallala, and several at wakefield and oran park, plus a lot of other driving probably about 50000kms.

no dramas with it yet, go the L series

_________________
1971 Datsun P510 SR20DET 276 rwkW
2005 Mercedes AMG E55 350 kW
1969 Datsun P510 L20B EFI 95 rwkW
1975 Ford XB Fairmont GS Wagon 179rwhp
1980 Escort Van SR20DET unfinished
2002 Suzuki GSX1300R Hayabusa 185hp

All early L6 motors have a spray bar oil system and a solid cam.
later L6's have the L4 style drilled cam system with oil outa the cam lobes!
Nissan Motorsport sell a Spray bar for the L4 that mounts inside the Cam cover and is fed from filter mount (adapter needed).
Or you can shorten the L6 spray bar and tap into the Cam towers with the oil feed.
The Later is the mod that I will have done.(as have a L6 spray bar)

The Standerd rocker arms are Forged items! As I said in the early post, NISMO never made an optioned rocker arm!!! WHY ?
Cause the standard item is up to the task ! Even the Famous BRE Race team used standard rocker arms (lightend&balanced) in its Championship winning cars.


..And the Lord said "Let there be Datsuns" , and the Lord made the Datsuns , with many makes and models. And the Lord took the Datsun onto the dirt and he was pleased with it , as It Was Good.

how bout swivel feet? apparently the daihatsu CB engines are popular racing in U.S., they have swivel feet available for a bout $44bux set US, if i remember correctly.....the bolt thread is appaenlt identical to datsun L.

_________________
Cheers,

Aaron

Whoa there Aaron!!

Daihatsu CB engines aren't popular for racing anywhere (apart from a few street racers in Newcastle who think they're sh!t hot, and the odd CB70/80 that's done ok in rallying in UK, apparently)

I remember the discussion we had about these swivels in This thread. However, the Datsun rocker is very different to a Daihatsu one, so these items won't work on a L series rocker.

Also, the ones I talked about were modified by an acquaintance of mine, they were originally designed for VW's

Hope this clears a few things up.

Datsss73,

I was just about to ask turbovan if he is running an external spray bar. Apparently tis best to use both if you are going to be running cams with that much lift.

So, I have an L24 sitting there with an external spray bar, and a P90 head there that I want a large cam in. Whats the procedure? Swap over the cam towers?

Dave

_________________
USA Daily: 2014 Nissan GT-R, very minor modifications for the track
USA Project: 1978 280Z, minor suspension upgrades, VK56DE conversion in progress. SOLD
AUS Race Car: 1973 240Z, L28ET, Autronic, GT35R. SOLD
AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild. SOLD

i think you need to tap into thel oil passages in the P90 towers.
should be no real drama!
Even tho the cam oiling is excellent, I dont think it could hurt to have some more oil on the valve-train.



..And the Lord said "Let there be Datsuns" , and the Lord made the Datsuns , with many makes and models. And the Lord took the Datsun onto the dirt and he was pleased with it , as It Was Good.

IF stock is OK then just add a turbo oil pump with a little higher pressure. That should be enough maybe.
But if running a 590 maybe you should but I have seen guy get away with the stock system.

ahhh thanks Warps!!!
I was wondering where i could remember the swivel feet thing from!!! I think the correction would be Volswagen engines are very popular for racing in the US, and THEY used modified CB feet....etc....etc...cheers!

_________________
Cheers,

Aaron

True & yet not.
Whilst Nissan never made competition rocker arm as such, there is an upgraded arm that the works tuning manual recommends to use.
PN 13257-W0300
( for L series LPG engine)

BTW. have ran cams with 0.625" lift. Need to recess the valve spring seat
in the cyl head to prevent coil binding & special retainers.

_________________
A little knowledge is a dangerous thing.
www.datsport.com

"R.I.P. Baz. 29 April 2022. Thank you for all your contributions to the Datsun community over the years. You will be missed." - OZDAT

Baz,

Wow. Surely you could just use different springs with fewer coils so they could compress more without binding?

And whats special about the retainers you need? and where do you get them?

Dave

_________________
USA Daily: 2014 Nissan GT-R, very minor modifications for the track
USA Project: 1978 280Z, minor suspension upgrades, VK56DE conversion in progress. SOLD
AUS Race Car: 1973 240Z, L28ET, Autronic, GT35R. SOLD
AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild. SOLD