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Rip the N/A RB20 out and use it as ship ankor. Replace it with an RB20DET/RB25DET and mod that or sell the car and buy a turbo skyline. be realistic.

Dont mean to be too negative but N/A performance is 2 costly for what you could get out of forced induction for half the cost. Probably less.

out of an RB20DE!? There may be some ppl out there that can get that sort of power out of N/A but u'd have to really know what your doing...just seems like a huge amount of work compared to the forced induction route, that's all.

The point i was trying to make is- to me it seemed like we wanted to go fast (200 rwkw) thats why i suggested forced induction if he's on a budget. I wasn't rubishing N/A.

But if this guy really wants N/A than go 4 it i suppose...

Haha, mine comes out of a 4.5ltr engine. Not arguing yes its easier to just turbo an engine, but there is nothing like the feeling or driveability of an NA engine, and quite simple some people just prefer them. I have a personally prefer NA, and some forms of supercharged engines, with low to mid range response, im not a huge fan of turbos.

I've seen 140rwkw VL RB30 with a medioka cam and it made 198rwkw with a 75hp shot of nos. I've always wondered about the rb30 26 head conversion two cams higher compression say 10.5ish maybe higher, tuned length individual throttle bodies topped off with trumpets. I would say 200rwkw wouldn't be all that far off maybe more on the right fuel. I say go for it. I would luv to thrash those turbo punks out there with an NA skyline.

cheapest option: sell it and atleast get a rb25DE :(

cheap option: buy half cut do a conversion

chepish option: turbo current car (but you still wont get that kinda power outta it)

expensive option: V8 conversion

Speaking of which, me and my brother are in the process of putting a VH45 into my R32... with a manual box ;)

Good luck with getting 180rwkw out of an NA rb20... a 150 shot of the nozzle would get ya there :(

Wobbz - What manual gearbox have you found to mate up to the vh45.  I take it your going aftermarket ecu?

None will mount directly to the engine. We'll get a custom adapter plate machined up to suit whatever box we finally chose (thinking a rb25 or z32 box (same internals)... but still have to work out shifter locations)..

As for aftermarket ecu, yes! I'm keen on running an autronic... they're (in my opinion) one of the best ECU's around, despite what some people say about wastespark (who usually don't have a ****ing clue). My brother has had great results despite others telling "no no, wastespark is bad... you need CDI if you want good power" etc.... yet his supra is making over 500rwhp with this so called shithouse wastespark using factory coils etc.

:/

Although i havnt finished with my rb20det 280zx im already thinking about the next project.

Im seriously thinking about putting a built N/A rb30/25 into a 240z.

I was reading a zoom article a while back about building an n/a rb30/25. according to them they achieved a 32% power increase from just the head swap. that would equate to roughly 150kw at the fly from a stock 114kw rb30. Thats in the same region as a standard rb30et without any work just standrad 25 head on 30 block. not too shabby. Then think about upping compression, full engine balance, porting, cams, management etc.... I dont think 180rwkw is out of the question.

id love a balanced NA six pot capable of 12 or 13 second passes.

Take a look at this 240z vid. 3.1L stroker with triple carbs making 320hp.

http://www.bbgraphics1.com/73z/strokervideo.mpeg

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