So I have a 05 enthusiast Z; and I'm about to get Stillen Headers, Injen Intake and a tune... But the shop I've been going to, to fix up my Z recommended I get the Plenum Upgrade first.... I haven't got it yet because from what I've read online only it shows it decreases hp and torque... Is that true because the shop told me I would be increasing hp and torque??? So I"m confused and dont want to waste money on something that decreases power.... Need help... Thanks

 

Why not new gears first?

 

are you talking about a spacer or a new plenum? im not an expert or anything but from what i have read the stock plenum tapers off so your front 2 cylinders dont get the same amount of air. adding a spacer lets everything get more air.

http://www.*********.com/zwiki/Part:Plenum_Spacer

 

2003 JDM Car
Mods:
AEM long arm Intake
Scorpion Y pipe back exhaust
Shell Vpower Fuel
Approx 20 Degrees temp
34psi tyres

Before:



2003 JDM Car
Mods:
AEM long arm Intake
Scorpion Y pipe back exhaust
Motordyne Plenum Spacer
Shell Vpower Fuel
Approx 18 Degrees temp
34 PSI in tyres

After:



Make your own opinion up

 

Dude there are countless dyno charts on this site in regards to spacers SEARCH

 

Yes...search is your friend...it will educate you. But if you're too lazy, then I will give you a shortened version.

So we all know that engines use air and fuel and a spark to combust and make hp for the engine...so what would happen if you increased the air flow into the engine?

More HP..and yes, TQ

The Stock Plenum on our VQ engines is angled downward, which restricts air flow to the front two cylinders...if you give them more air by adding a spacer, then you've done a good thing.

I would buy the plenum upgrades first...save the gear for last.

 

MotorDyne 5/16 iso-thermal spacer and you will be all set buddy.

Gains are proven across the band. I saw the greatest gains in mid-range torque.

Adding new plenum (ie: Kenetix, APS) is a waste of money unless FI, as is MREV2 for an 05' or less with DE.

Also:

1. Ditch the headers (waste of money)
2. Ditch the Injen intake (get either JWT Popcharger or stock 06' airbox w/K&N dropin)

 

Hmmm, my long tube headers did me some good when I got tuned

 

Like ??

How much Hp/TQ ??

Did you dyno before/after headers?

Were gains worth $400-$500 for headers plus time intensive install fee?

 

Well I didn't pay an arm and a leg for my headers. OBX long tube headers. Do a search for my post with my dyno results and you'll see my torque gains. I dynoed after I got my headers.

Yeah I feel it was worth it for my headers and the money I spent on installation. My Z sounds a lot more burly than most other Z's and I feel a lot more pull when I floor it. So no, they were not a waste of money. To you maybe, to me, no.

 

get the motordyne spacer dude, its cheaper than an injen intake and supposedly gives around as much power.

"Gains are proven across the band. I saw the greatest gains in mid-range torque."

^ like they said i felt most of mine between 2300 and about 4500 rpms

 

yeh I ment the spacer... This is the one I was recommended...

http://www.thezstore.com/page/TZS/PROD/350z09c/11-3096

 

haha alright

 

Alright. yeh the gears was the last thing that was on my mind to do... Thanks for your help

 

O ok... My cousin got the jwt popcharger in his Z and he was telling me the same thing too but I wasn't to sure if it was gonna be worth it, but I guess it is at the end. haha

 

Dammm. haha I guess everyone has their own taste in doing different mods... It would be boring if all us Z oweners had it fixed up the same way...

 

Dammm. haha Yeh I'm gnna just get the motordyne spacer and see how it goes for me... n then later on I can decide from there what to get next.. Thanks

 

wth! 283whp on a DD, from an '03 with just I/E!!

4th gear pull? Sorry.. but the flag is necessary

 

from all i have read on az350 swapin up to 3.9 or 4.08 gears is one of the best mods you can do short of FI best bang for the buck and as for intakes isnt the stock z tube with a k&n and the intake hole(sorry cant think of the name of it) almost the same as any cai just WAY cheaper?

 

That's what I thought too, but then I noticed up top he said "JDM car" so not necessarily, 350z.