skyline confused

[groove32]

Hi all... i have a r32 gtst and its pretty stock.. just has 3inch exhaust and pod... i want more power..

the question is should i work the engine (would it be woth it) or upgrade the car??

thanks

[Sydneykid]

How much power do you want? What are you doing do with the car, road, drag, circuit, drift?

[bretto]

it all depends on what ur budget is, and like sydney kid said what u want it for.

[groove32]

i guess i want it for road... i want at least 200rwkw....

[Sumo]

from what i've read 200rwkw is not at all out of reach for the RB20

[Elithrar]

There's nothing wrong with working the RB20; sure, it may not have as much off-boost torque as the RB25 in the R33, but it can still go hard.

If you want to get some power, the first things to concentrate on are the intake and exhaust. Get yourself a decent cat-back system, a high-flow cat, a better front pipe and a split dump. For the intake side of things, get either a good panel replacement, or a pod and a heat-shield.

Support systems need upgrading too; a cheap upgrade is injectors from a Series 5 RX-7 (?), as well as things like an oil-catch can and an upgraded fuel pump. These things will prepare you for the next 'stage'.

After this, especially with the RB20, a new turbo is in order. The stock one can't be boosted much, nor does it flow much high in the rev range. Think R33 T3 or R34 T3. Both can be gotten cheaply, and, if needed, high-flowed. After this, a bleeder or (much preferably) an EBC (electronic-boost controller) (at around 12psi). Either a piggyback ECU (Greddy emanage) or a full ECU (PowerFC) would best go on at this stage, especially to stop the engine from running supremely rich (as it does when boosted above stock). Also, a FMIC (front-mount intercooler) should net you a few more rwkW's, and an aftermarket blow-off valve (atmo or plumback, your choice, but I'd go plumback) to stop the boost from leaking.

Now, you should be happily getting around 200rwkW's, should everything be set-up properly and nothing is wrong with the engine. Don't neglect to get better brake pads, and think about upgrading the suspension (Whiteline Handling Kit, plus some springs & pineapples).

Finally, larger wheels (17x7 will fit comfortably), decent rubber and anything visual (bodykit, wing, etc.).

If I've got anything wrong, or missed anything, feel free to correct me.

[bretto]

what elithrar said....

[red17]

If its for street use, i wouldnt bother with Emanage, PowerFC or anything involving removing the stock computer. Just get a remap, its cheap, effective and involves very little messing around.

I thought injectors on an rb20 were good for that sort of hp (264), why upgrade?

[Sydneykid]

Hi red17, in a 6 cylinder 270 cc injectors = 270 bhp (200 kw) less say 50 kw for losses = 150 rwkw. Some people get a litte more. We use Series V RX7 Turbo injectors (550 cc's).

[93RPS13]

Hi red17, in a 6 cylinder 270 cc injectors = 270 bhp (200 kw) less say 50 kw for losses = 150 rwkw.  Some people get a litte more.  We use Series V RX7 Turbo injectors (550 cc's).

i heard that you need to modify the plug to fit the S5 RX7 injector how did you mod yours to fit? if you have pics that would be great. thanks

[red17]

Sydneykid, ok, if i understand correctly you are saying the limit of the factory injectors is around the 150rwkw mark.I know youve said before dynos are different all over the country it seems and its hard to compare figures. But for the sake of the discussion, lets.

My car dynoed 190rwhp on a dynapack (hub dyno) in pretty much stock trim, all its got is a full exhaust, turbo to tip. This equates to 143rwkw. So the stock injectors have only got lets say 10-15kw in them? Im sure theres RB20's around which would put this claim to the test.

I also recorded 218hp on the same day with higher boost, however fuelling issues were very much present, im not sure if this was down to ECU, Injectors, pump or whatever. If your statements are correct, its highly likley injectors might be responsible.

Red17

[C_DawG]

i heard that you need to modify the plug to fit the S5 RX7 injector how did you mod yours to fit? if you have pics that would be great. thanks

Just cut the Nissan plugs off the loom, and use RX7 ones to fit the injectors. Its the same ammount of pins etc, just a different style clip.

[Sydneykid]

Hi red17, you have to have injectors that are sized to allow for acceleration enrichment, cold start and run etc. So most people allow 20% for that, leaving an injector duty around 80%. You can dip into the 20% reserve if you like but most people would not suggest it for long periods. Your 218 rwhp is 162 rwkw, which equates to 88%, OK for short periods, temporarily, but I wouldn't recommend it stay that way. Try a cold night with prolonged acceleration and you could be in trouble.

Hi RPS13, as C_Dawg said, we use the RX7 plugs.

Hope that helps some more

[93RPS13]

can you buy those clips at the autostore? also what are they called injector harness or what?