what kind of power..

[Billy_Jack]

i'm wondering what the reliable limit i can produce is with the following engine setup:

hks gt2530's (rebalanced)
cp 86.5 pistons
stock rods (magnafluxed)
arp head studs
arp rod bolts
cometic .051'' headgasket
acl rod and crank bearings
hks hard piping
denso 660cc injectors
kakimoto exhaust
oem oil pump
not sure on the fuel pump yet
hks fcon vpro
hks evc

i'm not interested in any sort of racing, perhaps some spirited driving but nothing with extended high rpms and i'm not going to have any battles with the rev limiter either

opinions?

[LittleDevilCRX]

With the HKS 2530's you should expect just over 500whp around the 1.4bar give or take and very responsive at that mark. I wouldn't go too far over that without doing some tranny work tho. I have basicly the same setup and stock tranny lasted a week. lol. hope that helps

[Billy_Jack]

that does help, what did you do to your tranny to upgrade it? the tranny has been apart on this car before (sealed with high temp silicone) and it was a track car when it was in japan, but i'm not interested in taking the tranny apart to see what is inside though.

[LittleDevilCRX]

You should be fine if it has been rebuilt. My tranny was the original stocker with 120XXXkm's on it so it made sense it was the first thing to go. Ended up losing 3rd gear. lol. I am going to try another stock low km tranny next. Hopefully it holds up. If not I may look towards the os giken 1-5 gear set and inputshaft. Issue is I like the stock gearing with the power my car makes.

[hozer]

OEM oil pump should be replaced. I wouldnt push for any sort of power without replacing that

Injectors are gonna be run pretty hard at around 500WHP.

Reliable limit for that exact setup I'd say 350-400WHP. OEM oil pump is not to be trusted beyond OEM power

[Billy_Jack]

You should be fine if it has been rebuilt. My tranny was the original stocker with 120XXXkm's on it so it made sense it was the first thing to go. Ended up losing 3rd gear. lol. I am going to try another stock low km tranny next. Hopefully it holds up. If not I may look towards the os giken 1-5 gear set and inputshaft. Issue is I like the stock gearing with the power my car makes.

do you know if there is any difference between the r33 tranny and the r32? as well this one has only 68000km, so i'm suspecting some aftermarket parts

[LittleDevilCRX]

r33 trannys are suppost to have better syncros but I haven't had one to rip apart yet. Newer is generally better.

To Hozers point, make sure you at the very least put a crank collar on the crank to fix the drive issue and also upgrade the oil pump to at least an n1. As the oem ones basicly gernade. Its like $200 to get a collar and fix the crankshalf and like 250ish to get a n1 oil pump. I kinda assumed everyone does that on a rebuild as its the weakest part of the rb's sorry about that oversight.

[gezed]

Aren't N1 oil pumps by design optimized for a higher operating RPM? and that being the only difference between OEM and N1

11 tooth vs 12 and stiffer relieve spring to increase pressure while flow rate remained the same.

So the pump you choose is based on what the purpose of your car would be, for example if you're doing mostly street driving with that setup then the OEM pump is optimized for that style of driving and the rev ranges that it'll see, and if you're gona rev the piss out of it all the time and track it everyday then go for a N1 or a Reimax hardened gear

I guess it all comes down to application since in terms of durability of gears, OEM and N1 are the same, but definately get a new pump when rebuilding

[Marus92]

Aren't N1 oil pumps by design optimized for a higher operating RPM? and that being the only difference between OEM and N1

11 tooth vs 12 and stiffer relieve spring to increase pressure while flow rate remained the same.

You're thinking of the N1 waterpump that has less impellers for high RPM and yes you're right N1 oil pump yields higher head at the same flow rate.

[gezed]

N1 oil pumps from Nismoparts.com is only $205 compared to $180 of the OEM might as well go for a N1 pump