I purchased a few bolt on mods for my 350Z over the course of the last month... you can see the list in my sig. I wasn't expecting a huge gain, but nothing at all?

My friend/roommate owns an '03 350Z Track model and we have raced numerous times. His car is bone stock other than Injen intake. Before and after my mods... there is NO difference when we race.

I ran a 9.1 @ 77 MPH in the 1/8 last night with a 2.1 60'... I don't know what that means since that is the first time I have ever ran the 1/8. The car ran a 14.4 @ 95 in the 1/4 at 4,600ft above sea level bone stock.

I don't know what to do now... should I flash the ECU? I have put $2000 into mods and installs, and have gained nothing.

Any ideas would be appreciated...

Thanks,
Paul

 

at 4600 ft your kinda screwed. the HP/TQ loss at that level is extreme, and gaining HP with mods is even more extreme. We see little to no gains at sea level let alone being up that high. Sorry bro, getting a turbo or SC will be your only solution to solid HP gains at high altitudes.

 

very well put. +1 on that

 

get rid of the injen intake and get a Kn N drop in filter, the cold airs lose power all day on my dyno...

plus when i had one on my car a long time ago at the track, i took it off and put the stock air box and picked up 1.5 mph and over a 1/10th in the 1/4

 

POPCHARGER!

 

Thanks for the replies... I should clarify just a bit.

The only time I ran the car at high elevation was for the 1/4 mile runs. The 1/8 mile was pretty close to sea level, and when I race my friend we are on the coast.

I would think with the UO Crank Pulley and the Intake Manifold alone I should at least walk a bit on my buddies stock '03.

I guess you have to drop close to $8k on forced induction to gain that valuable second or two.

 

If you have to purchase a stock airbox try to find an 06.

 

You can turn the injen CAI into a short ram can't you?

 

Yes. Would it really make much of a difference?

 

sucking air through a short straw is easier than sucking air through a long straw.

 

:sighs:

I can't say how many times I've recommended other members not using a cold air yet they swear that I'm wrong

 

Do a reflash to tune what you have and raise the rev limiter, then forget about the bolt-ons and get a 3.9 FD. You won't regret it.

 

By the way:

I don't believe Tony @ motordyne ever advertized that the MREV2+spacer will make better 1/4 mile times at the track. Only that it increases torque a lot without sacrificing too much peak HP.

I've heard a few accounts of people running stock rev-up plenum at the track, and consistently trapping higher MPH than any non-revups with mrev2+spacer.

The revup definitely has more power in the top end (in stock form). My impression is that adding the MREV2+spacer to a revup will add a lot of midrange torque but will not really help the top end.

Mrev2+spacer is more about improving the driving feel. If you don't like what they have done to your top end, then I will remind you that Tony has a money back guarantee.

 

+1 ... I guess people don't realize the stock intake is CAI already, only it has a shorter tube, and less heat soak than most other intakes.

 

If you ran 9.1 seconds, then 9.0 seconds, then 9.2 seconds, what would that tell you? I’m afraid the one days testing at the dragstrip is a poor tool.

 

wrong again my friend LOL

 

 

Seems $ to bolt on = not really worth it>xcept self satisfy... Save cash and go big............fi

 

Really? Directly off www.motordyneengineering.com:

"This stealth modification adds 11HP-13HP and reduces the effect of power robbing heat soak. The 5/16" plenum spacer is fully compatible with all stock and aftermarket strut bars."

"Multiple independent test show when used with a 5/16" spacer on the REVUP engine, the combination will add a "minimum" of 15+ HP and 18+ TQ in the upper midrange. Many independent MREV 2 Manifold REVUP tests have dynod in excess of 20HP and 30 TQ in the upper midrange and with high RPM peak power increased by 3-5 HP."

The car does feel more responsive and better, but the actually HP is not there. I am taking it to the SoCal Dyno Day in May... so I will see the actually RWHP.

 

K&N and stock air box..............works as good as 200plus intakes. (if not better) Smart man