Someone on the Crawford Dyno thread mentioned a plenum spacer plate from Japan. Where do you get this? I thought about doing something like this a few months back, but couldnt find anybody offering it. Did this mod in my high school days on my 383 mopar with a phenolic insulator between the carb and manifold. Good thermal insulation for a cooler fuel air charge and with the VQ, would be even better with the increased plenum volume. I'm sold if someone could tell we where to send my $$$.

 

It's not worth it. Esprit makes it. Check out www.bulletproofautomotive.com or PM MATIX on this board. You would either need to lose your stock strut bar or cut your engine mounts I think.

It is also quite expensive.

Dan

 

It required trimming your engine mounts so that the entire motor would sit lower...

Unless you were ready to give up your strutbar. Then you can slide the space right in.

 

Very cool. Thanks for the link.

http://www.bulletproofautomotive.com...il.php?ID=1172

Since I have a G35 sedan, no strut bar and no engine mount cutting. As long as the throttlebody doesnt hit the hood, should fit nicely. This looks like a good solid mod and would drop the air charge temp by quite a bit from insulating the upper plenum from the motor. I'm ordering it and will post dynos when its installed.

 

You're still going to have all the same heat transfer properties... every screw that holds the upper and lower plenum together is going to act like a conductor.

 

I've tried a custom 8mm spacer with nothing to show but i few hp lost.

It's a waste of time imho!

 

if you used aluminum screws, it wouldnt conduct particularly well. wouldnt hold particularly well either

 

I lost ponies with the crawford too, took it off and went stock again. Maybe all this intake stuff is bullocks. I'll save my money and go with the blower.

 

Mind posting the dyno where you lost power?

You'd be the first in history.

 

Did you give the ECU time to 'learn' about the change or reset it before giving up?

 

Stainless steel is a very poor conductor of heat.

 

Wish I could, but the disk they burned was corrupt and havent been back to get a new one yet. Doug said that others have lost power when combining plenum and CAI and the plenum was designed to work with a stock Z intake. I have a G, so maybe that was it. Anyway, didnt like the sound it made as well and the loose spacer inside the plenum was a concern if the bolt ever backed out. Add it all up, and 9 HP was not worth all that even if it did make it, so off it came and money refunded. No harm, no foul.

 

i certainly would not call the Esprit "not worth it"....fact is noone one knows anything about it here. However, talk to some knowledgeable tuners in Japan and they will tell you the overall Esprit package is VERY comprehensive, and the power it makes speaks for itself. Now, whether those results could transalte to a US Spec car remains to be seen.

 

People have lost power using a CAI at all. Not just plenum equipped cars.

As for a "intake" from a Z causing it to work... one of the EARLIEST plenums that was done went on a G35s. Directly replacement, INSTANT gratification.

As for the bolt "backing out" - ever heard of loc-tite? Your bolts aren't going to back out... I'm driven a plenum equipped car since day one. VERY hard... two road events and countless autocross. 20k miles later EVERYTHING is still as tight as day one.

As for sound... that's all good "Different strokes for different folks"... A LOT of people don't like the trick flow heads people put on Mustangs, etc... because they TOO make a lot of noise. If you're more one for a silent luxury car with a tad bit extra power, version 5 might be for you. I walked in when they were testing it, and I didn't believe there was a plenum on in the car. It's THAT quiet.

Bottom line... here is what I'm going to tell you - baseline your car, and then slap ONLY the plenum on... and you have my word you'll make good power.

Nice talking to you.

 

karlhungus

If Doug was as nice to as you say he was, and I truly believe he was. Great people to do business with, BTW.

The real reason you removed it was:

1. You didn't like the sound.

2. You were afraid the spacer might come loose.

3. Didn't work great with your CIA.

And - if No harm, No foul, - Why say the thing doesn't make power? Why not just say it didn't work for you and be done with it?

BTW, the new version has the spacers welded in, and the sound problem (which I never experienced) is fixed on the v5. My replacement v5 is in transit, and should be here monday. I have already cut my engine cover (to match my old plenum). I'll be posting pictures and my observations next weekend.

Lou

 

back from the dead.....any new thoughts on the espirt plenum or any other plenum??

 

As I posted before dyno runs will be posted this weekend on the new spacers along with the crawford and kinetix plenum. For now here is a dyno showing the different sizes of spacers as a comparo..
screaminz

 

I'm tried attaching a pic but once again it won't me allow me to because of the size. Here is the link:

http://350zmotoring.com/forums/showt...threadid=20122

screaminz

 

Can someone clear this up.. The plenum wont work good with a CAI??

I have a Injen CAI and really want the plenum.. hmmm.

 

Do a search for my old post with my dyno results for more detail on this but anyways....my car with bolt-ons and an AEM combined with a Crawford original ugly plenum, netted my 242 whp, I dynoed 239 stock-I was like I ordered a pop-charger and 1 week later redynoed, and I put down 253 whp. So with only changing from a CAI to a short ram I gained 11whp. The shop owner told me from day one-"your intake pipe (AEM) is way to long, put a short ram on"-- so I did and I saw gains, and I dont ever have to worry about any water issues....again this is just from my own experience, take it for what its worth.