Quick Turbo Question

UncleBenRep · #1 02-16-2005, 02:13 PM

Well i asked this question in the skyline forum yesterday and have no response to it yet, so i thought to give it shot in here because this is a very popular forum and you all know lots about skylines or the engines at least...what are the stock turbos on rb26dett? hks, garrett, something else....about what size? ....also if you were to do a turbo upgrade on the rb26 would you want to keep equal sized turbos, or do a smaller turbo and bigger turbo sequential setup??? i would say the sequential setup because the smaller turbo has little lag but lacks the high end and the bigger is just the opposite. or am i wrong?

SHIFT_KA24DE · #2 02-16-2005, 03:34 PM

which model skyline are you talking about? Nissan have used many different turbines depending on whether if it's a bcnr32, bnr34, etc...

The R32's at one point came with T28's and the R34's came with T25's i think? But this also depends on whether if it's a GT-R, V-spec, V-spec II, Nur, M-spec....

I think most of them were Garretts... some are called N1 specs, etc.. i'm not sure. ( they, as in japan, have a lot more variety when it comes to parts so we probably won't know much of them).

If your wondering about lag time... the reason why they have two turbos in the first place is to decrease the lag time. I wouldn't worry too much about it if you happen to have a rb.

The turbines may seem small but they are bigger than the stock Z turbines... ah well... do a search.. you'll get more info.

sf_carfreak · #3 02-16-2005, 04:27 PM

I think all of them were Garretts and depending on the spec of the car the impellers were ceramic or some other metal. The specs for R32 are A/R42・M24 (not familiar w/the terminology so you'll have to find out what that exactly means...). How you want to setup the turbo's depends on what stage you're going to drive your car. Generally speaking the trend I see is that twin sequential turbo's are good for track b/c of less lag (like in Gr.A and JTCC racing) and single big turbo's are used for 1/4 miles where your going for max power knowing the revs will be high. Of course I've seen plenty exceptions, but hopefully it'll help in your decision making

UncleBenRep · #4 02-16-2005, 05:02 PM

i figured they were garretts....so then my next question is what would be a reasonable turbo upgrade?? twin T3's??? twin T3/T4's??? or maybe t28 and T4??? because i can see both turbo setups.... one can use the same size turbos because each turbo is powering 3 cylinders....or the sequential setup makes since too since the bigger turbo is building its power off of the smaller turbo. Im just wondering if one turbo setup is better than the other or if they both have perks.

logik23 · #5 02-16-2005, 05:05 PM

Go check out turbo upgrade kits from big companies and see what they use.

driftking777 · #6 02-16-2005, 05:47 PM

depending on the flange type...if its a T2# series flange and not a T03/04 flange...a good alternative for good hp and good boost reponse is a t2871r...it can give you around 380whp-420crhp. thats with the .84 a/r...the .64 ar gives around 320whp...basically its an upgraded newer disco patato (if you know turbos you'll know what im talking about)...anywho...the T03/04 turbo is a good one to (if your looking in that flange type)

nissanfanatic · #7 02-16-2005, 06:32 PM

If I upgraded the turbo setup, I would go to one large single turbo. Plenty of snails out there today that can support big numbers with little lag.

nissanfanatic · #8 02-16-2005, 06:34 PM

If you are going to make big numbers, go with a T3 flange. Using a T2 to make big numbers is like trying to shit out of a straw after eating the pizza buffet and eating ex-lax chocolate for dessert .

logik23 · #9 02-16-2005, 06:50 PM

There's a guy making 750whp with a twin setup, power is not a problem with a TT setup.

driftking777 · #10 02-16-2005, 07:04 PM

he never said power was a problem with a TT setup...on a reliablity issue and saving weight, engine space and $$$...doing a large single is just as effiecint as a medium size TT setup...i personally would do a large single myself...there is absolutly no perks to having twin turbo besides bling...IMO

driftking777 · #11 02-16-2005, 07:08 PM

and btw nissanfanatic i didnt say T2...i meant the T25-T28 ect series flange...there are huge T28 flanges out there to capable of HUGE #'s just like the T3 flanges...(EX) http://store.yahoo.com/cheapturbo/gagt86ar.html i guess 475whp isnt much (j/k) but i mean...who the hell needs more than that in a small car...or skyling...a 500hp skyline is just as insane as a 500hp 240...

Hit_N_Run-player · #12 02-16-2005, 08:14 PM

why is everything internal wastegated? i want external!!

nissanfanatic · #13 02-16-2005, 09:23 PM

http://sound-performance.com/

Check out the project cars and the turbos. Theres plenty of potential in single turbos.

475whp is a lot, but I would guess that after you drove it for a while, it would become not enough just like anything else. Its an addiction. Just like drugs, adrenaline, euphoria, ect you always want more.

UncleBenRep · #14 02-17-2005, 02:38 PM

you all make good points, but i was also asking if a sequential turbo setup or same sized turbos are a better setup???

Hit_N_Run-player · #15 02-17-2005, 08:48 PM

sequential is hard to set up in the engine bay, but has said to be pretty street effective. I wouldnt know though if running seq on a 4 cyl is very effecient.

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