no problems...I checked the inside after a month, and there was no change on the interior (besides some oil coating the inside). the paint help up fine.

-Peter

 

Sweet. I got the plenum from triple8sol and im bout to start modifing it this weekend.

 

Im glad to see people are still taking interest in modifing our plenums. Cant wait to see the rest of the results from you guys. Keep up the good work.

Later
Todd

 

im gonna buy me an upper plenum and play with it as well =D..anything that can be done with the lower part?

 

Thats what this thread is all about. Its about modifying the lower plenum and i got mine and started almost finished now i will get some pics up soon.

 

Got my upper plenum back from the welder yesterday and have it all sanded and smoothed out. Should have pics up tonight.

 

where the pics at?

 

Here are some pics of the upper






Not completely done sanding it yet because I am so busy between 928 motorsports, Pivot Point and school not to mention my own 350z SC project. The outside will be flattened this weekend and powder coated.

The lower plenum has some minor work done to it including cleaning up the casting.

 

my projects on hold right now. my syncro gears are goin out and i gotta have a new tranny put in.

 

Too bad thats such a common problem.

I had it too.

 

Me too on my 2004 G35 Sedan. I've had 3 replacements so I'm on my 4th transmission.

 

Is there anything i can do to keep this from happening again.

 

I've learned quite a lot from this thread so far... Great work all!

Bump! :-)

 

No.

It has nothing to do with the driver. Its random.

 

Does Nissan replace them for you or do you have to pay for labor/parts?

My car is less than a year old and I swear 5th grinds if I shift into it any higher than 2500rpm....WTF!!!

Greath thread, more dyno time! lol

 

After reading all these pages I've definitely gained quite a bit of knowledge.

Now, did I miss the dynos by bilinghm ? The last post I read mentioned that their local dyno would be open in december but nothing since then.

Could someone point me the right direction if I just missed it?

Thanks!

 

If all your intake runners (or exhaust runners, for that matter) are exactly the same length, you get one specific RPM peak where the ram effect and power is maximum. Vary the lengths slightly and you spread the power over a wider RPM range. I dunno what the notch is for...
Decades ago, racing Chevy 427s and Ford 289s with fuel injection used to have 8 trumpets on the intakes which were usually staggered in height for the same reason.

 

Well after a long day of running around looking for non-ferrous burrs...

Before...



After...









My Buddy Travis helped me, well i observed and handed him sh*&, smooth out my lower collector portion of my intake plenum/manifold. Looks great, he radiused out the runners and took out the sharp lip from the casting. We also installed the Motordyne 5/16" Iso Thermal Spacer. It sounds a little throatier and pulls harder especially after ~4000 rpm. It no longer feels like it is struggling for air towards the top end of each gear. All of this saved me about $450 on the Motordyne Mrev-2.

 

you're time is a lot less valuable than mine then.

 

I think it's more about the fun of the DIY and the project than time value.