Camshaft Choices

[Gts-t]

Solid lifters.

There's a pic of the kit on nengun.

They look like regular solid lifters.. Which makes me wonder, would it be possible to drop gtr lifters in there. :S

I would assume not otherwise people would be doing it everywhere.

<{POST_SNAPBACK}>

Im pretty sure u can swap all the gtr stuff over, you just need to find someone upgrading there gtr to 10krpm stuff

Think SK mentioned it in the past

[Craved]

heres a pic of the head work and the lifter in that head ...

as the kit on the nengun site doesn't really show any details on what the lifters look like.

[Bl4cK32]

Im pretty sure u can swap all the gtr stuff over, you just need to find someone upgrading there gtr to 10krpm stuff

Think SK mentioned it in the past

<{POST_SNAPBACK}>

anyone can confirm this? id be a happy man

[Cubes]

Solid lifters are solid lifters...

Hydraulics are hydraulics.. They look very much different.

The small pic on the nengun web site or is it greenline?? unsure shows exactly what solid lifters look like.

They basically look like a little helmet.

[Craved]

this is from nengun .. not really too much info on what they look like

[S3_Girl]

If you could just swap them over..that sounds way to easy

logical but easy, i thought it would have been done hundreds of times

surely new GTR lifters from nissan ain't that much

cheers

darren

[joe2548]

hey all,

i am building an rb25/30det atm with stock cams, i have heard that the rb30 runs into harmonic issues above 6500, is this true?

i have an rb25det water pump and an rb30e water pump which should i use?

also are you ppl using the rb25det oil cooler.(i have put mine on the rb30det but havnt finished building it yet.)

i am using rb25det oil pump, but tossing up whether to buy new one or not because mine had lowish oil press on the engine it was off and shows slight wear on the teeth.

on the stock skyline guage my oil pump showed;

4-5 at idle when cold

3-4 at 100kmh in 5th

2-3 at idle when warm

my new rb25det(new motor- low km import) oil pressure shows

8+ at idle when cold

~6 at 100kmh in 5th

5 at idle when warm

i used the same oil pressure sender on both engines... so is the old pump stuffed?

[Cubes]

If it truley is warm and showing 5 on idle then something is definitely off.

Way off spec.

Apart from that the 8 on cold idle and ~6 at 100km/h is about right.

[Roy]

This is not fact, but pretty close (i think )

RB26 solid lifters dont drop into RB25. Teh valve stem heights etc are different etc etc so you would need new valves, retainers, lifters, springs etc etc....all that for usign 2nd hand lifters.

So again dont hold me to that, but a bit of research about 12 months ago had me sh1tty that Nissan gear isnt that univeral

There is nothing special about a solid lifter...and mos thead specialists would be able to do the conversion for you using custom lifters. Hell 10 owners get together and buy 240 off him and see what the cost looks like compared to Jap kits

[proengines]

A cheaper way out of a solid lifter conversion would be to use the RB25 neo exhaust buckets. They have a longer foot inside them to take up the distance that a hydraulic lifter normally would. They are made of aluminium and use a shim over setup, toyota 2jz etc shims will fit them to adjust the tappet clearance. They might not be super dear from Nissan and should definately be cheaper than the Tomei etc buckets.

They will work fine with most cams, only with very fast lifting cams you may run into problems with the shim diameter, that would be over 12mm lift though. The shim over setup will be slightly heavier than a shim under but I think the aluminium bucket makes up for the weight so it shouldn't be a problem. It works fine on the NEO.

[Chris Wilson]

Doesn't the 2JZ-GTE run small shims UNDER the buckets? All the 2JZ-GTE heads I have worked on are shim under bucket, the cam lobes working directly on the bucket tops, NOT the shims.

[Sydneykid]

hey all,

1. i am building an rb25/30det atm with stock cams, i have heard that the rb30 runs into harmonic issues above 6500, is this true?

2. i have an rb25det water pump and an rb30e water pump which should i use?

3. also are you ppl using the rb25det oil cooler.(i have put mine on the rb30det but havnt finished building it yet.)

4. i am using rb25det oil pump, but tossing up whether to buy new one or not because mine had lowish oil press on the engine it was off and shows slight wear on the teeth.

on the stock skyline guage my oil pump showed;

4-5 at idle when cold

3-4 at 100kmh in 5th

2-3 at idle when warm

my new rb25det(new motor- low km import) oil pressure shows

8+ at idle when cold

~6 at 100kmh in 5th

5 at idle when warm

i used the same oil pressure sender on both engines... so is the old pump stuffed?

<{POST_SNAPBACK}>

Suggestions follow;

1. A properlybalanced RB30 has absolutely no problems to 7,500 rpm

2. The RB25DET water pump

3. Nope, we use external oil coolers, lowers the heat loading on the radiator

4. Use an R33GTR oil pump with a wide flange drive collar (ProEngines have them) fitted to the RB30 crank

cheers

Ps; don't forget to limit the oil flow to the cylinder head (restrictor) and improve the return to the sump.

[proengines]

Doesn't the 2JZ-GTE run small shims UNDER the buckets? All the 2JZ-GTE heads I have worked on are shim under bucket, the cam lobes working directly on the bucket tops, NOT the shims.

<{POST_SNAPBACK}>

Chris, I have a 2JZGTE here at the moment that has shim over tappets and I did one in December that had the same but we converted it to the shimless buckets from the very late 2JZ/1ZZ engines. There may be one that is shim under but I haven't worked on one that is. The shim over toyota shims are the same diameter and thickness range as the RB25 neo. Have you had the buckets out of the engines you worked on and seem shims or are they shimless buckets, they are pretty common on later Toyotas.

[RPMGTR]

Unfortunately the R34 Neo buckets are larger in diameter than R33.......

Edited February 14, 2006 by RPMGTR

[S3_Girl]

I solved the problem...i sold my RB25 and got a RB26 head instead:)

cheers

darren

[Craved]

whats the general price on a rb26 head?

only reason i didn't go that way was due to the new exhaust manifold, and inlet plenum i just bought and installed on the RB25..

[S3_Girl]

whats the general price on a rb26 head?

only reason i didn't go that way was due to the new exhaust manifold, and inlet plenum i just bought and installed on the RB25..

<{POST_SNAPBACK}>

Prices vary from $1000 upwards, but it was easier for me as i have a RB30 with

GTR sard injectors etc, so all i am changing is exhaust manifold, and will put my

Throttle body on the end of the 26 plenum and change the crank angle sensor

wiring plug. Working out the maths it is lot easier and cheaper in the end with cams than doing the 25 head.

cheers

darren

[2BNVS]

im also stuck with cam issues, my rb25/30 made 352rwkw@16psi with a modified td07s turb0 its in the shop atm hopin for 400rwkw@20psi, the head has gtr valve springs and gtr cams. the car will be mainly street with the occasional drag and very odd drift..

just wanna know which cams would best suit it and increase the potential of my current setup

ben...

[Craved]

which rb25 head are you using?

[2BNVS]

series 2 r33 rb25det