The rubbing has to do with the OP selection, 150/250/350. The Type A vs Type B differences are just the angle of the merges in the 4-2 step down, which results in the Type A being TIG welded and the Type B being MIG welded.

I'm listening lol

@NotSoJDM did Phantasm tune your car with OFT? I'm in NC and I'm looking for a tuner to do my car with the Type A/350 and OFT. This'll be done once I finish putting in my new engine. If so maybe could you PM me some info about them. Thanks! And awesome job!

Hey Jimmy, I did the tune changes for the ACE header on my car. I just used the facilities at Phantasm to Dyno my car. I'll shoot you a message.


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Man...! I'm so looking forward to this setup for my BRZ....

Ed

I thought the difference was that the Type A is all butt joints, while the Type B has slip joints (overlap)? Don't think it really changes the first collector merge angle?

You'll notice on a Type A the merge is fully TIG welded where as on a Type B the merge is MIG welded. This is due to the change in merge angle.

Type B: - 20 Degree Converging Angle.
^ Reference: http://counterspacegarage.com/ace-mu...-frs-gt86.html

Type A: - 15 Degree Converging Angle.
^ Reference: http://counterspacegarage.com/ace-mu...-frs-gt86.html

So you are hearing the valve train noise through these headers but not the OFH? I wonder if this is more of a EL header thing than it is a "thin walled tubing" thing, since this noise can also be heard while I was running a Tomei EL.

It's probably a tune thing, are they using OFT stage 2 el canned tune? You hear a lot of valve noise with those tunes.


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Yeah that's also a possibility since the UEL and EL tunes use different cam timing.

There is more power left on the table in the tune. My type A 350 makes 150-155 ft lbs from 3k rpm to 7k rpm dynojet on my track map. On dyno queen map it makes 160 ft lbs. :)

I would suggest having a really good tuner take a good amount of time to really dial in this header. My tuner said he was able to add a resiculous amount of timing over my uel header. The fact that you only added 1 deg makes me think that you have much more left un tapped.

Unless someone can design a header that will also fit with the factory heat shield. Otherwise it is no go for me.

I never invested much in tuning it because I already had my Edelbrock kit on order and made the switch to ECUtek. I agree there was definitely some room left had I had a chance to really invest in the VVT timing.


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150tq from 3000?!? That's on E85 I'm assuming. And by timing, you mean ignition timing not cam timing, right? Very impressive.