Yah that's what I thought!

 

Well.. The testing for the space was done on my car... I dont post much on here, but i read through the forums almost every day. My Car is completely stock except for a JWT popcharger and a few led's from Ares. I havent gotten my car back since ive been out of the country while the testing has been going on but from the look of things, I will definately be interested in keeping the spacer once i get back.

 

I might be confused here but all that hp came just from the spacer or the plenum also?

 

Just the spacer. The plenum being used is stock.

 

<subscribes to this thread>

 

When is this thing going to be available????? Cost???? Thanks.

 

Did you guys do any testing with a flat spacer, as in the same height all the way around? There is another spacer project which is using a flat piece, and I'm wondering what the differences are and why you decided on the wedge design...

 

+1

 

My best guess would be that the reason for the wedge design is the same as for an aftermarket plenum. Aftermarket plenums allow more air to flow to the front cylinders than previously allowed by the stock plenum. The front section is raised more as there is more room for improvement in the front section.

--- Hope this helps

 

Yea i think the same as 350zluver. Having a flat spacer would not get rid of the slope in the stock plenum, but just make it higher, and it seems the front cyclinders would still be limited to less than the rear cylinder's. I really like what Altered Atmosphere has done with this, and can't wait to see more results and pricing info.

 

did the question of whether the stock engine cover will fit get answered?

this would be so awesome except i bought a new JIC strut bar, i would rather not part with that.

 

Well i want to see a consumer do a test on his own car. And hopefull the product isn't alot of $ like the fuel system you guys came up with. Not to say you're one, but many manufacturers exagerate the product. Especially such high HP claims on our VQ.

With all the 15hp header claims, 10hp exhaust claims, 10hp plenum clains, 10hp test pipe claims, and 15hp plenum spacer claims from different manufacturers, 300whp bolt ons would be no problem, but in real world i don't see it happening.

No diss intended. I have complete respect for manufacturers, but lack trust for them. Get it out on the market now so we can see what is possible w/ it!

 

1+1=2 math doesn't work with bolt ons

You'll still gain power and sound meaner though

 

one small correction...you can't have plenum gains and plenum spacer gains, it is one or the other. The plenum spacer was made to make the same results as a new plenum would by getting rid of the angle in the stock plenum.

 

I'm not sure the slope has been clearly proven to be a poor design. Obviously firms like Crawford, Kinetix, and APS have gone with a flat or non-sloped design, but some of the work being done by the "spacer" suppliers suggests the front intake runners simply need more room, not that the plenum needs to be semetrical. Flow bench testing has shown that the forward cylinders are incapable of receiving the same volume of air as the rear cylinders by 5-10%. However, we aren't driving flowbenchs. It is possbile, actually likely, that the flow bench does not adequately represent actual engine running conditions. A 5% airflow increase on a flow bench does not equal a 5% increase in power. If it did the intake runners would be enormous as well as the primary header tubing.

I have a Superflow 600 and have done a lot of induction/exhaust work for drag racing. Gains on the flow bench don't always equal horsepower gains..in fact, sometimes it can be just the opposite. If in fact the front cylinders are restricted under running conditions, it is possible that the problem could be cured by either the spacer (sloped or flat) and/or a plenum (sloped or flat). The trick is to eliminate as much pressure drop as possible under atmospheric conditions. There is a point of diminishing returns however. The rules change a little for FI guys.

I look forward to trying the spacer (both designs).

 

Actually I left out the other half of the equation.... minimizing pressure drop while maximizing runner velocity. Sacrificing velocity for high flow numbers will definitely generate LESS power in the 350Z/G35.

 

OK Everyone, we have a TENTATIVE pricing structure. We are stilling doing some testing to make sure everything is 100%, but we believe the design is good to go.

So, retail is going to be $249. We'll be starting a group buy later in the week to get preorders started at $199!


(TENTATVE, but almost assured)
Keeps the factory Strut Bar!
Keeps the Factory Engine Cover!

New data from the dyno. After doing more runs both with the stock plenum and our different spacer designs we were able to narrow power gains from 10HP to 15HP! This is done by taking the highest stock and lowest stock then the highest with spacer and lowest with spacer. Obviously this is a practically stock car (JWT Popcharger) and we would like to do some testing on more modified cars as well as on cars that we can flash to see a broader range of numbers and effects. Let us know if you're in the area and would like to help out.

 

you guys are insane... 250 and preorders at 199... honestly believe most people would rather spend the extra money and just get a crawford or kinetix plenum... i mean how m uch could that small thin peice of metal cost... sorry but Id rather take my chances with the spacers that crawford was just talkin about putting under the plenum than spend 250 dollars for a peice of aluminum.

 

did this dyno include an ecu reflash from AAM? or was it simply just the part and resetting the ecu?

 

10-15whp or hp??