wat can i do for more naturally aspirated performance?

[G33]

i want to spend money but dont kno wat on!
can ppl give me some advise on wat to do?
btw, id like to keep it naturally aspirated...
thankz

[bourbon]

fully rebuild the engine...lumpier cams...aftermarket ecu...adjustable cam gears...lightened crank...larger and higher compression pistons...larger throttle body or quad throttle bodies... the list goes on...

[elementofglen]

free up the air intake and exhaust that will make more power for a start but make sure u do it proply especially with air intake as u could end up losing power.but bourbon is onto it

[bourbon]

im doin this myself of course..

[elementofglen]

sweet man.let us know how it goes

[twilightprotege]

best bang for buck NA is an engine management system, bar none! naturally b3motorsports can help you out with a microtech

[dave0r]

yes ECU for sure
a good 10% extra HP just from that alone before you even touch the internals

so after spending heaps $$ on a "correct exhaust system" ie smaller! than 2.5", cams, pistons, crank, pullies, valves, ITB's, head work, more head work etc

you'll be looking at a good 180-190hp at the engine

[RedLineResident]

^^ really?

that much?

[Putonyourshoes]

from which engine can you get that much from?:O would the v6 be better than that?

[RedLineResident]

^^hmmm don't know.

i don't know how the v6's would respond to us fiddling with the internals. the 4's are usually a lot more mod friendly in that regard but having said that im sure the v6s would certainly benefit from all of those mods mentioned.

air intake, extractors and ECU is where i think you;d make the most head way with the 6's tho

[bourbon]

i reckon the V6 could do a bit more...but the standard ecu is a big big restriction...doesnt let you pump in much fuel and air to try and make it as fuel economical aspossible...

bud you can make any engine have more power! you gotta do it right...all cylinder engines run on the same design (basically) do the same to a 3 cylinder car as you would a 4 and a 6 and also V6 and youll see power gains!!!

[Rupewrecht]

Increase the bore, increase the stroke, raise the compression and you'll get more power out of anything. But it all costs money!

[rodhog]

actually on the V6's

it's noted by a few tuners that ECU does not add much to it.

see I had this Unichip doing nothing. so I figure I'll chuck it on the Astina. - was told - don't waste the time. the ECU is already advance enough on it.
Yes there were gains but nothing GREAT. It was proven to me with a dyno print out of a 626 GT-P race car, most of the gain was with exhuast. Car ran A unichip untill they wired in a motec- to run the whole intake etc - oh and unichip to motec - motec only gained 1kw overall. Note also they could only do minor mods to the engine - like cat back and filter in factory box.
every was standard. Well standard to the eyes of the officals


where as I have had all my other 4cylinders run with aftermarket ecu's and piggybacks. all improvements

but majority of engines do love ECU changes. especially Pre euro 4 compliant ones.

the Euro 4 compliance has meant full electronic spark advance control by ECU and with hi comp and low octane fuel - knock sensors are found even on low cheap 14,990 model cars now. along with VVT

it makes it hard to get a cheap ecu to do the whole lot.
I like microtech and have inside deal but Even I'm going away and dropping my unit in the mx-6 for either another Adaptronic or Haltech.


But something People for get interms of performance is - less weight.

the gains can be excellent.

if oyu can shave 100to 200kg's - you would be surprised how much quicker your car goes.

[RedLineResident]

^ hell yeah.

lose the rear seats, boot trim and contents and most of the fuel in the tank and bingo.

[twilightprotege]

engine management doesnt usually add massive jumps in power, especially peak power, however their biggest advantage, as dave0r indicated, they give you power gains everywhere. 10% across the board is certainly far from abnormal. lordworm has a stock sp20 and put on a microtech. he dropped his 1/4 mile times by 0.7 seconds just from a microtech.

with mods, i dropped about the same time down to 14.5 with jsut the addition of a microtech!

so in other words, power everywhere is the advantage

[G33]

thanx fellas, well ye, i got half cut extractors upto the cat (2inch) which is stock tip whichi is realli sneaky yet gives it a nice explosive sound once it hits twin cam... i got air intake plus cold air n thats bout it... my cars a nice lil one. how do u upload pics onto this site ?

[dru]

try uploading onto www.imageshack.us and posting the link.

[LordWorm]

+1 for EMS.

You may not get as big gains on the V6 as you do on a 4cyl, but you will still get substantial gains (differences may be as minimal as the difference in mechanical effeciency, more cylinders invariably means increased rotating mass and most importantly FRICTION in the rotating assembly), but i'd be expecting somewhere from 4 to 10% at any given point on the curve.

Stock ecu's are very safe. Generally, they err on the safe side of lean at low RPM to improve cruise fuel economy, and go exceedingly rich under load as a defense against detonation. Both are very good ideas in theory, but you will find stock management overdoes both of these, which impacts power. Further to that, improving the timing curve (again, normally set to be stupidly safe) and taking advantage of higher octane fuels can lead to great gains. I remember reading about a test one of the guys in the states did on a boosted engine, agressive timing at 16psi boost vs very tame timing at higher boost....made more power with more timing than he did with more boost. Of course there could be more to this story but the point is that control over timing, and the full use of better fuels is going to net you some pretty good gains.

Add to that the ability to dial all your mods in to get the most out of everything (instead of being limited to how far the stock management can push things around), and you can actually go crazier than you could with stock ems (stock ecu's might brick wall you when you start throwing in huge cams, custom manifolds and so forth). You can lift the rev limit, and so on and so forth.


Thats my take on it at least :P

[Sleepy Gonzalez]

In addition to what's been said, an increase in rev limit can be very beneficial depending on what you need. eg. If you can get to 60 in first and 100 in second(assuming you couldn't before), this saves at least half a second from 0 to that speed. This can be useful in traffic.

[dave0r]

increasing the rev limit doesnt really help a stock BP...as most BP n/a's dont make anymore power after 6500rpm, so reving to 7500rpm still means gears well in to the torque band falling off. ..its ya torque band you want to be in and its ya torque you want to make more of

i change early at the track and i get faster times.. this isnt the case for the Vtec/4age-20v people