Just recently I've been considering options to increase power. The car doesn't really need it but as men, who make calculations using a method deemed "Racers Math", we always want more.
My torque falls off a bit near the end of my power ban and it's just no fun. I've considered the Honda manifold solution but it's just a bit too messy and quite frankly, I'd like something that has been specifically tuned and developed for a forced induction BP motor..
From what I've picked up, BEGi might be the only company that has done their homework on an intake manifold for the BP motors. So I'll be installing one of these:
On top of the performance gains, it's quite a bit lighter than the stocker. Should have this guy in the next couple of weeks.
Interested in results.
I thought I saw a post by corky some time ago praising the miata engineers and claiming that they couldn't improve on the oem design too much and that their mani only gained a bit up top at the expense of lowend. Something to that effect. I hope they refined it since then........
Please try to do back to back logs and/or dyno's if possible.
I know that's asking a lot, but there are only a handful (maybe less) proven mani comparos on here and 80% of the people dunno wtf they're talking about with respect to intake manifolds.
I've seen the same post. The dilemma was, I believe Corky wanted to improve low mid and high end power. The problem is, with a power plant that makes all of it's power with a turbocharger you just can't do this without something adding velocity to the equation in the lower parts of the power ban. Maybe something could be done with cam's to help with this but he praised the engineers for a reason:
They did a good job on the low end without killing the high end... on a naturally aspirated engine!
I asked myself, when I'm trying to go fast what area of the power ban am I using? 5k and above. 5k and above is where their manifold is proven to show increases. From what I've seen the loss down low with their manifold is a bit less than most results I've seen.
Ran this last night as a bench mark, I'll run it again before and just after the intake manifold installation but you can see my torque curve is a bit soft. My current manifold is also probably creating a lot of heat with it's restriction.
This was the Dyno without meth just after the build - This also paints a pretty clear picture. Restriction.
My daily driver is an awesome example of how velocity makes power down low. The VR6 motor has a chamber through all of the runners that directs air under different load conditions. It feels strong down low and up top. I'm actually surprised that we have not seen an aftermarket manifold with butterfly flaps like the VICS because it truly is an impressive design, just doesn't have the capacity to maintain up top.
Either way, I'm expecting good results with this manifold, the factory one is a weak point in all high horsepower BP builds, plain and simple. BEGi also spent a really good amount of time developing it, I believe the post you referenced from Corky was also prior to this manifold being a finished design.
Awww....I was doing burnouts on a back road yesterday, that makes us twins....except for the color, the trim, nice wheels and tires, proper suspension, ecu, turbo, clutch, transmission, built motor...... ----. I give up.
So after running Virtual Dyno on my Adaptronic, I noticed that my boost levels were all over the place. I think I've got some vacuum issues because it now takes 100% on my waste gate map to create 19 PSI.
Also - In preparation for my new BEGi intake manifold, I've picked up some hard line and fittings. Also grabbed an oil pressure sensor from AEM. Digital baby A new breather was added to the order, because I blew the other one off!
Some of my order came in from BEGi.. Yum. Stephanie ships with the quickness.
Curise Relocation Bracket
Oil Drain Line - Stainless
Random hardware for the Intake Manifold
Still waiting on a couple of pieces that are likely being produced right now (Intake Manifold).
Excited, and most of all impressed with the quality of these parts. Just the way it's packaged with literature and hardware says a lot. The individual bags give off a very "Motherly" vibe. But my Mom never made beautiful-forced-induction-Miata parts for lunch