272 Cams Ported Head -7 Turbos Rb26

[r14]

as description says ive got a set of greddy 272 degrees cams 9 1/2 mm lift and 550cc injectors - 7 turbos dumps etc ..can any one tell me are these cams to big for theses turbos?? and what kind of power should i get out of this combo in a rb26 or what would work??

[R31Nismoid]

Far far too big. Go back to stock cams.

As for power - read the dyno thread. Plenty of results in there.

[GTScotT]

Consider they are the OEM item for a fairly well tuned OEM motor (R34 n1). Going to an enormous cam would be futile in a search for gains.

Consider again that they are well within the motors factory scope and a cost benefit analysis will begin to form.

Ultimately when wouldn't a ported head and the right cams be good? I say if your really serious about maxing out what you've got you should look harder at step 1 based cams and relax on the dreams of expensive port jobs. Be it myself I would run a set of gears as it seems the forum has proved they are a bang for buck performer.

step 1 cam size can be seen as 25x or milder 26x variants.. GL

[N1GTR]

-7's go for tomei poncams tybe b

[Dave.TAS]

I have a dirt cheap set of brand new tomei cams for sale

[N1GTR]

What part numbers please?

I'm keen

[Dave.TAS]

Have a look in my for sale thread

[Dave.TAS]

Or send me your phone number and I'll send you a photo of the box/labels

[R31Nismoid]

Or take it to PM and keep this on topic?

[MrStabby]

Sell cams, buy cam gears and save the difference. Or if the cash is burning a hole in your pocket post details of your setup and we'll suggest something much more useful to spend it on.

[r14]

well what i have got a the moment is the cams ported head 550cc injectors new r33 cranck stock rods, n1 piston 1mm o/s. cam gears n1 oil pump -7 turbos .arp bolts .. this engine was a stillway built engine but when i pulled it done every thing was stuffed and it was running a t88 turbo.. any ideas on what would be a good combo for these -7 turbos ...and would any one want to buy these greddy 272 degrees cams???

[R31Nismoid]

We've given you options as to what would be good, have you read the replies?

[r14]

so in a nut shell stock cams and adjustable cam gears are the best for stock to mild rb26 cheers guys

[N1GTR]

Im telling you, after back to back testing; tomei poncam type b's and adjustable cam gears.

[R31Nismoid]

Testing where? A Dyno?

Or on the street, hills, circuit - lap times etc?

[N1GTR]

Dyno, I've also driven both cars on the street afterwards.

Both got to within 4rwkw of each other at 8000rpm (both around 305rwkw), the one with tomei cams is all over the OEM cam'd one until about 5500/6000rpm (from memory, may be slightly less, i dont have the dyno sheet here) where they are then dead even until redline.

[DVS JEZ]

Torque graphs would be good. Useable torque is where its at for me.

[N1GTR]

Ill see about that when im there next for you

[DVS JEZ]

Thanks

[R.3.2.G.T.R]

Dyno, I've also driven both cars on the street afterwards.

Both got to within 4rwkw of each other at 8000rpm (both around 305rwkw), the one with tomei cams is all over the OEM cam'd one until about 5500/6000rpm (from memory, may be slightly less, i dont have the dyno sheet here) where they are then dead even until redline.

very interesting.. finally someone with real results for poncam b on GTR, I've been on the fence as most say it's not worth the money vs result and stock works well

were they dialled in or left at zero?