8 lbs of boost in the plenum is nothing compared to the pressure being exerted at idle - the problem with the Kinetix is purely because of the plastic they use (did use) and the way the bolt holes were designed... both problems have been solved with the V4 and I believe that this is going to be the plenum to have in the future (whenever all the kinks are worked out - worth the $350 risk to me) - IMO it is a superior design to the Crawford and the plastic used will also sustain lower underhood temps.... but as with everything else, only time will tell...

 

BTW, by 10psi of vaccum....I meant -10psi....I think everyone understoof that..since i said vaccum...

So how exactly is -10psi of vaccum more stressful than 10psi of boost??

Although the force of the pressure is the same (-10psi is sucking the plennum downward, and 10psi is pushing it upwards)...the VOLUME of air is certainly not the same.

 

Yeah, but GQ, the plenum doesn't SEE volume, it only feels the pressure. Time will tell, though. I ran it pretty good today, and I'll be checking for cracks pretty often. So we'll see how well it holds up.

 

Ok im trying to put aside preconcieved notions and focus on pure reason.....I havent done much research on the kenitex plenum as it is made from plastic.

Ok the material of the plenum matters not if the structual rigidity of the material is designed to withstand a positive intake pressure (boost) at a pre determined psi. For example if it is designed to not fail up to 15 psi positive intake pressure.

If this is the case then it would be only be an issue of which plenum offers the most even airflow across the cylinder banks and which is capable of flowing more air.

Is the kenetix actually designed to withstand the internal boost pressure of current fi methods (10-11 psi roughly would be the max)???

Has anyone taken a digital temp reading of the kenetix vs crawford?

Is there flow bench testing that proves the kenetix has a more even airflow to the cylinders ??

In regards to cracking it does suprise me that there are problems here ... there are tons of O.E.M. plastic plenums on production cars ..why does it seem to be so difficult to produce a plastic compound that would not crack??

Why do some people think the kenitex is superior to crawford? Is there rock hard proof of this??

To anyone thet knows please explain... I personally cant get past the idea of plastic but regardless of that i would like to know exactly why those that chose kenetix over crawford did so and if anyone has F/I with the kenetix plenum.

 

as far as the kinetix being able to handle boost, I believe kinetix has said no, they are developing a different one for fi.

as far as stb, here is an alternative that will work. it comes in unfinished stainless though, and has to be painted or chromed. I painted mine satin black. its the stillen one, and there is no reason it wont work with the crawford.

 

another view. its black, so hard to see.

 

LOL your silly.

Have you had a chance to run at a drag strip? Im interested in the times the Stillen SC will make.

Does the Kenetix V4 also require a new strut bar?

 

whats that belt attached to the plenum.......

 

Atlanta? You need to get an intercooler on that thing

-D

 

That's looking at the issue somewhat backwards. The actual problem is that the front two cylinders are starving for air, running rich, because of the way the plenum slopes down in the front. The Crawford plenum solves the problem the correct way by balancing the air flow to all 6 cylinders.

The only downside of the Crawford solution is that you have to relocate the strut brace forward to clear the larger plenum. But Crawford offers a kit to do that, so problem solved.

 

The Stillen Strut bar looks cool IMO. Why not a Crawford Plenum with the Stillen Strut bar?

Thats what I most likely will be doing.

 

Yeah, the Stillen bar does look better than the Crawford one, don't think anyone has done the crawford plenum with the stillen bar though.

 

the crawford bar wouldn't fit with the stillen s/c, so the stillen bar should fit with the crawford plenum with no problems.

12.8 is my best et, with crawford, pullies, technos. ecu, borla dual my best was 14.3

I have the intercooler.

 

I love what Crawford is doing with the plenum, but I wish they could make their replacement strut bar a bit beefier...is is really flimsly looking, and when you push on it, its definately not as stiff as the stock bar.

 

I don;t know. When the crawford car was rolled 3 times, the strut bar was the only thing not bent on the entire car.

 

Why not plum an extra injector into the plenum so that it sprays in the area of 5 & 6? I know there are several companies that make injector control units, Power Enterprises and HKS to name a few. As far as I know they are fairly easy to tune for various parameters. Come to think of it this could also be a solution for the TT guys having problems getting enough fuel with higher boost.

 

does anyone know just how much leaner 5 & 6 are? just becasue they get more air flow does not mean they are significantly leaner. it could just be .1 of an a/f ratio which is not that bad.

 

That's a workaround hack, not a solution. Most people are looking for a real solution, which also has the nice benefit of making more power as well.