New Miata Junk 2 Intake
#109
I'll take long runners thank you. I thought I read a post somewhere that the runners are 10" on the Skunk2 (have not confirmed this myself). That's exactly the right length for this type of manifold. Gordon (trackdayhookey) did a bunch of testing with runner lengths and ended up within 1/4" of OEM with his 450whp Rotrex car.
It's a function of the displacement, RPM and cams. Peak power wins drag races. Area under the curve wins road races.
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#112
That being said, I agree that the one piece cast design should be far less prone to cracking than the welded design, though not impervious. A poorly designed or poor quality casting can be prone to cracking too, especially in a high vibration situation.
#113
Shorter for less torque with a Rotrex?
I'll take long runners thank you. I thought I read a post somewhere that the runners are 10" on the Skunk2 (have not confirmed this myself). That's exactly the right length for this type of manifold. Gordon (trackdayhookey) did a bunch of testing with runner lengths and ended up within 1/4" of OEM with his 450whp Rotrex car.
It's a function of the displacement, RPM and cams. Peak power wins drag races. Area under the curve wins road races.
I'll take long runners thank you. I thought I read a post somewhere that the runners are 10" on the Skunk2 (have not confirmed this myself). That's exactly the right length for this type of manifold. Gordon (trackdayhookey) did a bunch of testing with runner lengths and ended up within 1/4" of OEM with his 450whp Rotrex car.
It's a function of the displacement, RPM and cams. Peak power wins drag races. Area under the curve wins road races.
I followed Gordon's intake manifold work. He did go really short with one of em and made a peaky HP monster. I have no desire for that. If my current Honda skunk 2 is really 10" I'd be thrilled with this new Miata setup. Looking at the posted dyno it looks like HP was really starting to take off at 7k.
Last edited by k24madness; 09-22-2017 at 11:19 AM.
#115
I have a square top that I picked up, was ready to port it for my skunk 2 TB but I will wait for results on these. Like some others said, it would have to perform a good bit better than a square top on a 300whp car for me to buy it. Prefer the look of the OEM one more than the bling and branded Skunk 2. I haven't had any issues with their Throttle Body, but apparently others have, so it kind of turns me off from the brand a bit. Not even sure what these issues are