SimonR32

I literally just pulled one set of cams at 250deg 9.15 lift and replaced with 260deg 9.15 lift from the same manufacturer (Tomei). Changed NOTHING else and picked up 300rpm of boost response, so please tell me again how I'm wrong and it has hurt response?

So interesting result so far, went for a drive with the Type-B's (260) today, getting boost 300rpm earlier in 4th gear to the Type-R (250). Was 3900rpm in 4th to get 1.0bar and now it's 3600rpm with the Type-B. No other changes, same tune and cam gear settings... Go figure, a lot different to what some would lead you to believe

Ok so a bit of an update. I went to 250 Type-R poncams, lost top end (probably 20-30hp at 700hp) and matched bottom end but the old head did have the intake squish removed so it's not a direct comparison. Type-R cams are now out Type-B cams are in and should get a retune in next few week, so it'll be a direct back to back... In the mean time I went a little nuts and figured I may as well build my old head so I now have a Tomei 1.2mm gasket, Supertech valve guides, Kelford 270-274/274 10.8mm split intake cam gears, Tomei cam studs and other stuff. So should be interesting how these split lobe jobbies work

Have you vented your sump yet?

Sold

Sorry guys. R32/R33 cas drive and $600

Tomei Type-R Cams Drop in 250 9.15 (Intake and Exhaust) Only a dyno session old. Come with full install instructions and original boxes.

1.5bar was around 600, dropped to 580 and 2bar was 740, now around 690hp

I've gone from either 256 or 260 Greddy cams to 250 Tomei Type-R's. We matched the response but lost a few ponies top end (probably 20-30hp on moderate boost and 50-60hp at the higher end). I'm actually a little disappointed but now thinking I'll chuck in a set of Type-B 260's that I have sitting at home to see if they are better suited. It's also not a completely scientific comparison because my old head had the intake squish removed and aftermarket head gasket that would have played with compression but I would have thought that would make it laggier if anything.

Yes I would haha

Unless you have a savage nose over you will generally find that torque to the ground is higher in a lower gear so rev that bitch away

@PranK ?

Just checking if we ever ended up getting a "My content" link on desktop and mobile? Can't seem to see it anywhere

Can you do a little test for me? 4th gear flat road, low rpm, load it up and see when you hit 15psi? PS. Very nice result, I'm guessing it's going to be awesome to drive

53mm

It's only at high speed and high I have found... Mine only starts rubbing at over 200km/hr

Koyo rad, new Nismo engine mounts and factory shroud/fan only causes munching. Tried new everything, still went munch munch... Swapped to a GKtech fan and adapter and all is well

I'd love to see what correction they are using to get 600kw out of a 8374, would be interesting? Jeff's R14 did 525kw on a EFR8374 on same hub dyno we use on 2 bar. In saying that my set up has always made around 30-40hp more than set up GTX3582R on the same dyno, same correction etc. Generally the GTX seem to top out around the 500kw mark, mine used to go 525kw and when we turned it right up to 11 (with a extra few pounds of boost and 2 more degrees of timing) it gained another 25kw again on top of that. Now days with my new stock motor and smaller cams (Tomei Poncam Type R) it's hovering around 515kw. I just checked and Matt's RB30 EFR8374 went 450kw on the same dyno but with a much lower 1.6bar which is very similar to the power mine makes at that boost.

Mine went 552kw with a 6262 CEA at the hubs on 30psi so I'd imagine it's not at its limits yet

If he would wind up the boost he would probably win some more As others have said it's so hard to tell because there aren't really back to back results vs others in similar size. Matt's car is awesome and way more responsive than mine but is that the extra 0.4L capacity, the turbo or both. Also most of the gain he gets down low he loses up top as I tend to rev the little 2.6 and he is much more conservative. The end result (in terms of track times) are always very similar, we basically swap times throughout the day at most events we enter. I'm still willing to give a EFR8374 a go, but I don't know if it will fit on my manifold (Trust T88 split T4 kit) and it's also going to cost a fair bit for new oil/water lines and a dump pipe. I'd actually be more inclined to go a 9180 as it would be a power upgrade where I think the EFR probably wouldn't match the 6262 top end.

All good, you don't have to be sorry. It'll just be awesome if we can get it back

I basically only use the "My content" button to search for threads... It had been gone from the mobile platform for a while (so I was just requesting the desktop site) but now it's gone from both mobile and desktop forms

If you pull the gearstick directly down you will select 2nd

New motor in and going with the Tomei Poncams (Type R) 250 x 9.1mm Went 590hp at 1.5bar and 670hp with 1.9bar. Didn't bother pushing any harder as I just want to see it's all good until I push it a bit more. A little disappointed I didn't pick up much low down power with the smaller cams so might try type-B's in the future.

I'd almost guarantee that it's done a bearing or worse. Normal break in doesn't get glitter oil