Best Turbo upgrades?

[s13-rb26dett]

If you were going to upgrade your r32 skyline's turbo's.... Would you do a single or dual. I am going to stick to stock block but will do engine managment, injectors/fuel pumps, clutch..... Let me know what you would do for the best value for the money. I have a nitrous system to use to spool up turbo or use with system. I want to have upgrade room when I can afford internals... Any recomendations on turbos....
The engine is out of car now.

[SkylineUSA]

Its a direct shot N2O system, it better be or number 6 will be fried. I am not into the singles, meaning I do not know much about them. If I had the funds, I heard very good things about the New HKS GT-RS turbos. If money is an issue, 2530 are a good all around turbo. 2540, have a little more lag, but should be better for the 1/4.

Have at least 600cc with the 2530. Sean mention, get your injector flow checked, put the best flowing in number 6.

What is the purpose of the car?

[Supra650RSP]

If your going to keep the stock internals use the 2530's like mentioned above. You can put some pretty serious numbers to the ground and still have a very driveable automobile...Check out Sport Compact Cars Ultimate Street Car Challange...he ran 2530's from my understanding and put 509whp. I've got a Skyline on order as well as an HKS T51 SPO Single Turbo kit. I've got a Single in my Supra and love it. THe only problem with this kit is that it is almost a necissity to use stronger internals. HKS makes a T51 KAI that will put about 800 whp but it is pushing the limits of the internals in the car...and it's about 7 grand

[s13-rb26dett]

car is gonna be for driving, and some drag and some road coars. Its not a full out race car but want to take to track to put down some good numbers.... Its a demo car for a shop. The Nitrous kit I have from old car is a nitrous express wet system for a corvette. nozzels from 35-150..... My turbo numbers I would like to be upgradble when next season we pull engine and replace internals then. Could a single turbo be still effecient driving around town, and even at low numbers of around 550-650. I know mario put down about 700hp at wheels with no internal upgrades, He just did all fuel nesecarry.

[RazorGTR]

HKS 2530's are great street turbos, but you are not going to see much more than 580 hp total out of them, even with internals done running huge boost. The just won't flow it.

A lot depends on how much lag you can live with, how hard you want the power to come on, and what rev range you wish to live in. Slapping a T51R Kia to the T51 SPL you are not going to see tractable boost until around the 5,500 rpm mark, and that is providing you have a radical set of cams, ported head, extractor (header style) exhaust mainfold, and very solid internals inlcuding ARP rod bolts, conrod, and forged pistons to handle that sort of boost and power levels.

For drivability on the street 2835's is the largest I would go, but honestly 2540 Rspec would be a better choice. They should flow up to about 650 hp total and boost threshold will be around the 4,600 rpm mark. Once you break into that 750hp range you will need to upgrade to a steel forged crank also. Just for a bit more info once you exceed that 550hp mark the factory gearbox will shat it self pretty quickly. An OS Giken gear kit will fix that but again they are bloody expensive and if you have an R32 more so as you need to change over some of the other internal bits as OS Giken only make them for the R33 style box.

Contrary to popular belief the factory block even the R34 block is not that strong. They have a nasty tendency to crack between the #3 and #4 cylinders once you start pushing over 850hp. This is a common fault with the design of the block.
There are two race teams here in New Zealand who run GTR's for drags. Both cars are extremely well engineered, tuned and built. Together they have went through 5 blocks in 2 years. They have even went to the N1 block and still are cracking them. Both are pushing between 1,000 and 1,200 hp using single turbos. One is using an HKS T51R SPL and the other a Trust T8834D. One is into the 8's and the other has run a flat 9 on street tyres.

There are so many variables that trying to put the lot in this single post is something that I am not going to do. I don't want to put you off but if your looking for serious poke out of RB26 engine you are opening a very expensive can of worms. If you can live with around the 550 hp mark as a daily driver you can keep the expense down as long as your not intending to race the car.

[SkylineUSA]

nitrous express wet system for a corvette. nozzels from 35-150

That will not work. I mean it will, but your engine will not last very long

I know of a couple of GTRs in the states that are over 600hp with the 2530s, which should be plent of power for what you want.

2530 will be able to push the engine to a safe limit, and still be able to get a lot of driving time. If you start pushing a lot more than that, that is when you start digging into your pockets a lot more. They are direct bolt on, which is why I will probaly go that route.

[Assasin11-17]

My tech skills may not be the best, but isn't adding N2O like mixing Red Bull and Tequila. Gets you going strong all night long but at the end of the night it drops you off the edge like Wile E. Coyote. Plus you get a nasty hang-over in the morning.

[SkylineUSA]

The RB26DETT intake design is crap, thats why a single nozzle will not work. Only a direct N2O system will work.

N2O is a fine power adder, just have to make sure you know what you are doing. I know of a lot Stangs, and Camaros with over 100,000miles on the engines that run 100shot or greater.

[sami]

Originally posted by SkylineUSA
N2O is a fine power adder

IF you are a drag racer...

[SkylineUSA]

Sami,

Yes, and no. It all depends on how you use it, or I should say how much you use it and at what RPM range. It can be very beneficial, if thought out and used right.

[sami]

Originally posted by SkylineUSA
Yes, and no. It all depends on how you use it, or I should say how much you use it and at what RPM range. It can be very beneficial, if thought out and used right.

Lets say you're going to spend the day road racing at track, how long is the N2O bottles going to last you? I know it depends on the bottles and how much power you're looking to add with them but could you expect them to last you all day of heavy use? (yes, my knowledge of N2O is limited to theory)

Speaking of the bottle size, how much weight would the equipment add? When you're talking about usable power, you need to make sure it is available to you all the time.

[Assasin11-17]

What about street racing. Summer time is gonna be coming up quick. Would it be worth the time to even think about adding a N2O system. Personally I would rather add HP through kit upgrades. What I am asking is it feasible.

[sami]

Originally posted by Assasin11-17
What about street racing. Summer time is gonna be coming up quick. Would it be worth the time to even think about adding a N2O system. Personally I would rather add HP through kit upgrades. What I am asking is it feasible.

Street racing is pretty much like drag racing so adding N2O wouldn't hurt unless you're building a road race car. Bigger turbos that provide more flow, add N2O to spool them up. Now that would of course create lag when you're out of N2O...

For a streetable R32 GT-R you're going to best off with something like the HKS GT-RS turbos (similar to 2530's, provide the same power but spool up quicker) if you can find them. There really isn't any need for N2O, IMHO.

[s13-rb26dett]

Ok Im pretty set on doing a dual turbos in the car, Im tryign to keep stock internals and to be able to upgrade tiny bit more down the road as far as internals go and gearbox, what would be better 2530? or 2835r's?
Next is there any other compnaies other than hks? so the gearbox would only be able to hold 550hp? Any recomendations on clutches and then internals would be good till about what hp level or boost level?

Kyle

[Assasin11-17]

ORC makes a good twin plate. Thats what I have in mine right now. There was a good thread about it not to long ago on this site. If I remember correctly Singles are good up to about 400 hp plus or minus. Thats where I blew my last one. Twin are good up to about 700 ish. Triple plates are for anything higher. Twin plates take awhile to get used to and then some. Mine still pisses me off once in awhile. I was told that Triple plates take about a month and then some to get used to. It all depends on how much hp you are wanting to go. I am still undecided but I will definatly get a ecu, metal head gasket next, and some increased boost. I was told that would put me up to about 475.