Old man 32 GTR

Hi bro, how you been? How’s the car? I might have an rb 30 for sale soon! Lol

Just wondering what SAU are doing at this years GTR festival, will there be a display area for SAU in the pits?

Yeah I hear you, this is my car now, even with the 68/70, it’s on when you roll the throttle, rpm doesn’t really matter. As a street car, it’s probably as good as you’d want, but because I’m a little weird I think ‘As a GTR’ where do I want it? shouldnt a GTR have lag, isn’t that part of the driving experience, lol If I do this, it won’t be one engine out and one in, it will be engine bay respray, blast and coat subframe, replace bonnet, re wire engine bay. I will bring the bay up to a standard I want it. It presents well now, but It’s no where near finished to a level I’m happy with. But thanks for the the input, I appreciate peoples opinions on this, helps to give perspective and give me an idea what to expect if I move forward with this.

Another thing, guys who have gone from a standard crank to a billet crank, how much difference does it make? I’ve read that the billet Rev much smoother/quicker and feel very sharp on the throttle?

This is me, if I was building a motor, then I would build a 2.7/8. The 30 was in it when I bought the car, but it’s proven to be a very good motor. So now a part of me says stuck with what you got, you know it’s good, it’s set up and it works, and the other part says, build it how you want. Now it seems from the responses here that most, if building from scratch, would go with a 2.7-2.8 over a 3.0/2

That’s where I’m stuck, the 30 is in and is a great motor. Was built well, but a part of me really wants a 26. then on top of that, I’m nervous I’m going to be disappointed. AND at some point, I will be going back to a 26 block, just this opportunity has come up now and I was hoping to enjoy the current set up for a few years first.

Car make 440kw on 98 @ 20psi and 580kw on E85 @ 32 psi Obviously the powerband will move up the rpm range in the 2.7, but the 2.7 will happily Rev to 9500rpm and the 3.0 is restricted to lower rpm.

Cheers for the responses, looks like a 26 based bottom end wins the popular vote. To ‘let the cat out the bag’ I’ve been considering building a bottom end and was undecided which way to go. My car is currently fitted with a 30 bottom end. anyway, the opportunity has come up to purchase a JHH built 2.7 motor, built in an N1 block with their Raceport head package. My reservations are, my current setup is so good, torque everywhere, good response and fast enough for me, but this set up isn’t where I’m going with the build. I want a 26 block, but I’m nervous I won’t like it compared to what I currently have. the struggle is real! Lol

Not sure, on their website says the 68/75 is a more modern design turbine

I’ve done a search but haven’t been able to find anything. Is there anyone on here who understands turbos who would be able to explain the difference in how these turbos would behave / respond compared to one another. obviously housings can affect this so let’s compare 1. 6870 gen 2, 1.0ar T4 divided rear 2. 6875 gen 2, .96ar T4 rear now I know the 6875 is rated a little higher, will it actually make more power and how much will you sacrifice in lag?

Spacing the subframe and cutting some of the bonnet webbing

Just putting it out there, interested in hearing peoples thoughts on this. For a GTR with where they are going and with ‘purity’ possibly becoming more important nowadays. would you prefer a 26 based bottom end or a 30 based bottom end? and why? purely for discussion, let’s not go to war over this! Lol

64/66 is perfect, with the V cam would be quite responsive as well, perfect set up, just fix the head and turn it up! what power did you last make? I can get you a drive in a GTR with a 64/66 turned all the way up and backed by a PPG sequential if you want an idea of what it’s capable of. Just shoot me a pm if you’re interested.

Yeah, tough decision, but if you got it, probably best to stick with the V cam? If you want more flow, strap a bigger turbo to it 😁👍🏼

What cams are you using?

I’m running R34 GTR 18’ wheels on mine, they offered to test fit my wheels to their shop car (which has this set up) to ensure adequate clearance. I’m currently running the V spec Brembos which I’ve invested quite a bit of money into getting the setup right. but this is tempting

This looks killer, I called them as soon as I saw this, had a good chat with them, now I’ve also read the whole add. Looks to be a very well sorted kit. Might add new brakes to my Christmas list 😆

How much water is it pushing? When I had the cometic head gasket, it started pressurising the cooling system around 27-28psi through the 68/70, which was just shy of 500kw. It wasn’t that bad though, would basically fill the overflow bottle if I gave it a hard time, but would suck the water back into the radiator when it cooled down. When the head came off you could see where the combustion gases were making their way to the water channels, cylinder 3 was the worst and I think cylinder 5 from memory. It did hold together for over a year, and I took it on a couple of 500km in one day drives.

What head gasket are you using?

Well I’m at 580kw on ARP2000’s, nil issues. With a Tomei head gasket. @500kw using ARP2000’s and a Cometic head gasket, the head gasket failed. when the head was removed the torque of the head studs was checked and I was told they were torqued to spec. a mate of mine bought a JHH built motor. Motor was built for 1000hp, they used a Nitto head gasket and ARP 2000 head studs. when making the decision on what to use for mine I contacted numerous shops and engine builders. With my target being 600kw. Most recommend ARP2000’s. One engine builder stated he won’t use 625’s. Many different opinions, but BK hit the nail on the head, I’d go even further, for 95% of builds, ARP2000’s would be more then capable. Remember, CA625’s are a fairly new product, it wasn’t that long ago 2000’s were the best available and were being used, successfully on 1000+hp builds.

Some added touches, not the best colour match ? so I’ll have to get that sorted.

PranK, can you upload it to instagram, I’m hopeless on that platform, don’t really use it. ?? Cheers

Yes, it’s really nice. Was good to drive the car again, forgot how bloody fast this thing is. Even on gate pressure running 98 the thing is an animal on the street. But you can feel the reduced power in the top end, but it’s really strong through the mid range. I found out the motec uses the wheel speed and rpm. The gear ratios have been entered in so it can determine what gear it’s in. Actually works really well.

Hope this works, and yes, somehow, the gear position indicator works, with the standard gearbox still fitted.

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