Time For Camshafts

[OMGGTR]

hi guys,

Im at that time now in my build where the head work is going to start!

To give you guys some info before i start asking questions -

Build is going to be a track / weekend car

turbo choice was 2860-5's which i know are not the best choice for track because ive read up but i really also want some neat power figure too

so at the end of the day i need the quickest spool up i can and im sure the selection of cams will aid it...

ok i was stuck with alot of gashed to the crap lifters and rusty worn cams in the head so i ventured to nissan and got a quote for lifters at $98 bux each i told them they can keep them lol!

so im forced into buying tomei solid lifters which require small base circle cams.... so the cycle continues .... now i need cams to suit these buckets right?

minimum of 10.25mm lift tomei cams are required for these lifters so i was going to go with the 260deg 10.25mm or the 270deg 10.25mm tomei pro cams now can some 1 send me in the right direction for info on what combo i need? i hear that head modification is needed if i go to big a cam...

im kind of stuck because i dont know which size cam will give what result... like i said earlier i got -5's is any cam adjustable to give better spool ? and i dont wana hear it about the turbo choice lol strictly cam talk / advice only please..

[Deano 1]

i think both those cams are too big for those turbos, you'd be better off with some Tomei type B poncam's, they are more suited to -5s

[OMGGTR]

yeh issue is i really dont wana spend 2300 bux on just nissan lifters i need to use the small base circle camshafts which start at 10.25mm lift... these suit the tomei solid lifters can u elaborate?

[GTScotT]

www.precisionshims.com.au about $190 for full set of rb26 in any size u need

[Piggaz]

Have you looked at the Mines Cams? 252 @ 10.05 mm.

I currently have 270's @ 10.25 on a 2.8 (on -5's), the intake cam is advanced 12 degrees and the power curve still isnt dropping off at 9000 RPM.

The mines cams do come with buckets aswell. You may cough at the price (which is why alot of people don't run them), but when adding up the cams + buckets, they're not that much more exxy.

[OMGGTR]

gill give them a search now just to keep the other question going im un sure on what degree cam i should use... i dont know what results they give ?

[OMGGTR]

Have you looked at the Mines Cams? 252 @ 10.05 mm.

I currently have 270's @ 10.25 on a 2.8 (on -5's), the intake cam is advanced 12 degrees and the power curve still isnt dropping off at 9000 RPM.

The mines cams do come with buckets aswell. You may cough at the price (which is why alot of people don't run them), but when adding up the cams + buckets, they're not that much more exxy.

http://www.mines-wave.com/E_09/CATALOG/P_Eg_CAMSHAFT_SHORE_Pro2_E.html

these the ones you are talking about yeh? 350-400 awkw possible?? i just want the parts i put in capeable of reaching more if i choose also ...

[r32-25t]

If you must use a tomei procam use the 260 with 10.25 lift

But trying to stay with the standard cams on a 2.6 is always the best option, my tomei type b were to big for my 2.6

[OMGGTR]

Keep in mind nothing is standard in the engine anymore

[R31Nismoid]

What crank do you have then?

[Piggaz]

http://www.mines-wav...ORE_Pro2_E.html

these the ones you are talking about yeh? 350-400 awkw possible?? i just want the parts i put in capeable of reaching more if i choose also ...

Have a look at Nismoid's car. 365RWKW on stock cams.

[OMGGTR]

Ash lol fuuuuu i stand corrected crank and valves are still standard cant use stock cams the buckets and cams are f*ked ???!

Look i just want the best Option to use since i cant use genuine bukets

[rob82]

Have you looked at the Mines Cams? 252 @ 10.05 mm.

I currently have 270's @ 10.25 on a 2.8 (on -5's), the intake cam is advanced 12 degrees and the power curve still isnt dropping off at 9000 RPM.

The mines cams do come with buckets aswell. You may cough at the price (which is why alot of people don't run them), but when adding up the cams + buckets, they're not that much more exxy.

If your that far advanced and the power isnt dropping off at that rpm then those cams have dropped your dynamic comp that much it probly won't really react to much cam timing movement at all. I think it would be a wise choice to go to the smaller duration 252 @10mm lift. I would think that you would gain responses without loosing too much top end.

To the original poster I would recommend the same cams if you must go with that bucket size change.

[OMGGTR]

Would the 260 degree 10.25 mm be ok? Just works out alot cheeper but if i have to ill buy the mines ones

[Piggaz]

You have to buy the buckets anyway. It's only a little bit more.

[bigmikespec]

Small duration, no overlap and as much lift as you can.

[rob82]

Small duration, no overlap and as much lift as you can.

I love that comment because in a variable cam engine overlap is exactly what you want at low to medium revs!

But I agree with small duration and lots of lift - as long as the valve train can handle the ramps/inertia

[Piggaz]

Small duration, no overlap and as much lift as you can.

What? You mean huge duration isn't good for a street car?

[bigmikespec]

What? You mean huge duration isn't good for a street car?

Depends on how much power your street car is making and what the turbocharger configuration is.

rob82...why do you want overlap for at low revs with a highly restrictive exhaust side?

[T04GTR]

pro cams. pretty sure they come in a 260 degree with the small base circle