neit_jnf

iTrader: (17)

I have one of these A-Spec shorty manifolds for the FD. It seems like these shorty divided FD manifolds with twin ewgs are rarely if ever made anymore.

TeamRX8

iTrader: (2)

it’s welded too, heaven forbid …

I’m not too worried about different or disagreeing opinions, others can do as they will.

some people think I’m always digging on Rob, but no. I was beating the drum loudly over the 3R, but when he’s putting a G35-1050 with a 1.21 Vband and calling it the best manifold ever made or a G40-900 on a choked-up, mostly stock T2, I’m going to point it out for what it is.

So congrats and hats off on making the changes that they did with the G40/T2 engine combo and showing the true potential. The response vs peak output difference of the 0.84 A/R housing in lieu of the 1.06 would be interesting to see. There are a number of things yet to be proven over certain differences of opinion. It will all eventually prove itself out one way or the other though.
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rx72c

iTrader: (8)

From the many plug reads I have done while tuning at the shop. Intake manifold is the biggest influencer of variance in fueling between rotors. I have also had many instances where the rotor with the Hotter EGT doesn't end up being the one that fails. Nor does it register as the hot rotor (on EGT) when doing a plug read.

A good back to back for me on this one was changing from an OEM FD intake to Typhoon, EGT's showed Rear rotor being hotter, Plugs showed Front rotor being hotter. I decided not to do any fuel trims and when we pushed that engine hard it was the front rotor that failed, not the rear.

Take from that what you will, but plugs has always been the most accurate form of data to do rotor trimming and intake seems to sway it more than anything else. Can't see I have ever changed an exhaust manifold and seen a change in the plug read as a result. Not saying it is not possible, just saying It's not something I have seen

TeamRX8

iTrader: (2)

pro engine builder with almost 50 years experience told me not to bother reading plugs on a rotary

of course he always recommended 11/11.5 plugs for racing and you can’t go any colder in the usual rotary selection …
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rx72c

iTrader: (8)

I guess we all have opinions. I didn't always read plugs. I could say that since I have started, it's definitely helped in reducing the amount of engine failures I have had for sure. It has also helped me identify tuning/coil issues during a dyno session before the issue becomes a much more catastrophic issue.

TeamRX8

iTrader: (2)

yeah that’s all I intended, everybody skins the cat their own way

but always appreciate your feedback, thanks for sharing.
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