$1000 Performance Upgrade

[r34_25GT]

Hey guys, ive gone through the stickied threads and read about mods to improve power in NA Skylines.

Basicly, ive got a R34 25GT, stock aside from 2.5" catback and a highflow panel filter.

With a budget of $1000 ( give or take 100 ), what would you guys think would be the best mods for power gains??

[G0DZLR]

100000k service. will cost that much from a dealer but worth it

[N-DAWG]

Extractors and cat, maybe change your sparks to some irridiums if they're due.

[r34_25GT]

  G0DZLR said:

100000k service. will cost that much from a dealer but worth it

ahh ive still got another 25,000 for that

  N-DAWG said:

Extractors and cat, maybe change your sparks to some irridiums if they're due.

power and time wise what would be the improvement in your opinion ??

[N-DAWG]

Well...the key to unlocking power in an N/A motor is to relieve as much restriction as possible.

You've helped air flow in better with the hi-flow panel filter, which is in a box so it won't be soaking up as much heat as an unshielded pod.

You've done the catback.

Upgrading extractors will help scavenge the exhaust gas out of the engine quicker, and will generally help increase the power band in the mid-range.

Cars have the cats ripped out and replaced with compliance cats when they're imported. Chances are you've still got a compliance cat. Changing this will help improve flow between the extractors and catback exhaust.

Good healthy spark plugs will help with ignition, and of course air+fuel+spark = power. Good fuel also. If you're not already using 98RON fuel I would suggest it.

After that, disconnect neg terminal on battery, foot on the brake for about 10 seconds, reconnect, let the ECU relearn.

After all that's done, then you could look at a SAFC to clean up the Air/Fuel ratios to get that little bit of extra power out and improve fuel mileage...though the dollars spent on a SAFC + tuning could be put elsewhere.

Other than that, adjustable exhaust cam gear to get bit more power out. I would do that as part of the 100,000km service though since they're coming out anyways.

You mentioned the car is stock besides the catback? How's your suspension? Some lowered springs and sway bars will help make use of power already there.

If it were me I'd be deciding between extractors and cat, or suspension, if i had $1000 to spend.

The way I done it, I done suspension first, wheels/tyres, brakes, then went for big power. With power you want control. I know that the N/A R34's aren't the most powerful of cars out there, but upgrade your suspension and a good set of tyres, and learn to make use of the power that's there with the handling capabilities unless of course if you're only after straightline power, in which case the N/A R34 Skyline isn't the best choice.

[KezR33]

Put it into a savings account.

Wait three years.

Sell your NA and buy a turbo.

OR

Brake/suspension upgrade.

[SKiT_R31]

Sorry, havnt read the other suggestions, but...

extractors and piggyback computer, help economy and get a smidge more power, if you got an emanage ultimate, might be able to get a bit more power (with more ign where needed - usually in the higher rpm for n/a)

Alternatively (or as an extra) ;

Cams and/or Headwork, i.e. more compression from bit of a shave and a thinner say copper gasket.

even one of the second options (all your going to get for 1k) will give a good increase in power but is harder/more of a pain, first option will make an only just noticable difference, with a bit better drivability and economy.

How big is the TB/AFM on the 34's?

[r34_25GT]

  KezR33 said:

Put it into a savings account.

Wait three years.

Sell your NA and buy a turbo.

OR

Brake/suspension upgrade.

lol im actualy doing this atm, only 22,000 to go for a vspec 34 ahahha im just abit bored of the NA 34 and want abit more straight line power so ive decided that i can sacrifice a maximum of around 1k..

Thanks for the extensive writeup NDAWG, suspension wise i have done the coilovers and have swaybars in so its not too bad. Realisticly, would i be gaining anything out of a set of cam gears ?? To be honest that was the first thing which came to mind. Does anyone know of a reputable workshop around the sydney area that i can contact in regards to working on the neo 25de ??

cheers guys

[dori34]

^ sell up, put the $1k towards vtec = win

[r34_25GT]

  dori34 said:

^ sell up, put the $1k towards vtec = win

lol i think not buddy.. pretty fail imo

[N-DAWG]

  dori34 said:

^ sell up, put the $1k towards vtec = win