scorpionp54

ok so im thinking of some ideas on what to do to get my engine to around 200hp. im staying n/a and i want to keep it a daily driver.

now i want to raise the compression to about 9.5/1. i was wondering witch would be a better way to do it, oversize the pistons or to deck the head.

my other question is on my head can you clean out the exhaust ports to get rid of the round tube thats in there.

thanks

NismoPick

Shady is runnin ~200hp on his L28 n/a... he built that thing like a rock.

< gets out intraweb p.a. > SHADY!!! Tune in to this thread....

Basics:
Lots of head work (decking, valves, porting)
Mild cam
Header w/ 2.5" exhaust
60mm throttle body & turbo with n/a guts AFM
Upgraded ignition

scorpionp54

ya that is basicly what i was looking into doin. so if i leave the bottom end alone and just work on top end 200 would not be hard to do, just time and money

280zx2by2

wouldnt he need to port/polish the intake manny and bigger injectors? (unless those were a given)


EDIT: nm he's only going for 200 and the comp increase should about cover that... (up your goals )

NismoPick

You may have missed this:

polishing an intake is overkill. You want the air to flow unrestricted, but a slight agitation of incoming air actually helps the air / fuel mix.

280zx2by2

to get the fuel to further vaporize?

scorpionp54

i would up my goal but i dont feel like putting that much money into the stock n/a set-up. rb25 will be going in once i get a good paying job and have time to build that up.

Bleach

Z31 NA ECU +12 hp

scorpionp54

what exactly does that ecu change?

NismoPick

Yeah Bleachie... dig y0self 0utta dis 0ne!

jverz

He put 12hp stickers on it

hoov100

for the love of god, ditch the early 70's EFI crap and atleast get mid 80's EFI crap!!!!

Bleach

The flapper AFM will change to a MAS. The fuel metering system is much better and the ECU then controls ignition timing by using a distributor from a 280ZX turbo and the crank angle sensor from a Z31 is placed into that 280ZXT distributor.

Plus once that is in place you get basic "codes" from the ECU if there are issues. Its not an amazing fuel management system but much better than the ECU used from 1975-83. (plus its cheap to buy the parts)

1988-89 Z31 even has 2-bank injector firing! High tech! 1984-87 are super common in the wrecking yards too.

This Just in!
I just got a tip from NismoPick that a 240Z ECU also adds 12hp. I'm still trying to find one though. I guess they are super rare...

scorpionp54

i will definetly look into doin that.

so here is what i am planing to do

mild cam swap,
port polish head,
raise compression,
z31 ecu swap,(and everything else that goes with it)
60 mm tb,
5 speed tranny swap,
upgraded fuel rail,
headers, 2.25 exhaust,
remove a/c system

then back to what i asked first to raise the compression is it better to just deck the head or oversized pistons

NismoPick

Better? In what ways do you mean?

I say... Plug it in, plug it in

http://www.ozdat.com/ozdatonline/enginedesign/

http://www.atlanticz.ca/zclub/techti...der/index.html

http://www.zonc.org/TechnicalInforma...binations.html

280zx2by2

your 240 didnt come with one?

scorpionp54

i guess better as in a more reliable setup,

now after loking at those links im thinking more into an oversized piston, i looked at the msa pistons, but they showed they dont show any in stock. where else would i get them?

NismoPick

Nissan... or your local machine shop.

scorpionp54

ok thanks. i'll look around at the machine shops in my area thanks for the help.