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N1's are laggy as, we have them on our Targa car. My car has HKS GT2530's (same as 2860 -5 i think), and i'm on 1.1 bar @ 4400rpm, the N1's are on 1.1 bar at over 5000rpm.

I'd go the Garrett's if you can afford it.

Depends on how much HP you want to run and what sort of response you want. I've got the 2860-5 and they come on at around 4K and make 430RWHP without cams. You sacrifice a little response but I think they're worth it. PNBlight makes about 520RWHP on his 33R, but I would'nt expect to get alot more. From memory Garrett advertise them as a "replacement upgrade "for the 34 GT-R turbos (-7). N1 and 2860R-5 really are quite different turbos and therefore not really comparable. You'd be better off comparing HKS2530, 2860R-5 and Trust T517. There was a good thread that contained a side by side comparison just recently... the HKS 2530 and the Trust T517 have more legs and produce more HP at higher rpm respectively. That would make the 2860r-5 a good comprimise for price and reposnse.

I dont want to run more than 1.2 bar as its on stock internals ( last engine died on .85 bar bloody stock turbos ) and big horse power is not the objective just want a good solid performance.

N1's are laggy as, we have them on our Targa car. My car has HKS GT2530's (same as 2860 -5 i think), and i'm on 1.1 bar @ 4400rpm, the N1's are on 1.1 bar at over 5000rpm.

I'd go the Garrett's if you can afford it.

depends on the N1s though. there are heaps of different types. even in R34 N1s there are two different types. one has 0.48 comp and 0.64 turbine the other has 0.60 comp and 0.64 turbine, both ball bearing, but the 0.48 is very responsive. much more than GT2530s. the 0.60 would be less responsive, but should make a little more up top. If you are talking R32 N1s (aka Group A's) they are laggier still but have pretty decent power potential.

depends on the N1s though. there are heaps of different types. even in R34 N1s there are two different types. one has 0.48 comp and 0.64 turbine the other has 0.60 comp and 0.64 turbine, both ball bearing, but the 0.48 is very responsive. much more than GT2530s. the 0.60 would be less responsive, but should make a little more up top. If you are talking R32 N1s (aka Group A's) they are laggier still but have pretty decent power potential.

Since he said Nismo N1's I was guessing R32/R33 N1's.

As i dont want to run a big top end the smaller N1 would be more suitable. they are from a R34 and have a A/R of .48

Still the cost of rebuilding N1 turbos is almost the same a new Garrets

i went down this path 2 weeks ago.

brand new from garret they are around 1200, a new cartridge + rebuild was about 700 and i ended up going for 5mm oversize as new cartridge for 34n1's was about 1-2 weeks wait

Edited by Angus Smart

Yer not that easy over here, i guess i could find some one to rebuild them but no part available so would have to order them and wait. Think the new garrets maybe the more effective solution in this case

Cheers all

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