My Dyno day with Motordyne Bolt-ons..
Former G35driver Vendor
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On the revup or non revup, the 5/16" spacer makes a higher average power and the 1/2" spacer makes a higher peak power. Which is best depends on what trade works best for your application.
In any case, the exhaust addition makes the redline power higher (as shown in the plots above).
In any case, the exhaust addition makes the redline power higher (as shown in the plots above).
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The z model is a 2006 Grand Touring, Pikes Peak White, 6mt.
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On the revup or non revup, the 5/16" spacer makes a higher average power and the 1/2" spacer makes a higher peak power. Which is best depends on what trade works best for your application.
In any case, the exhaust addition makes the redline power higher (as shown in the plots above).
In any case, the exhaust addition makes the redline power higher (as shown in the plots above).
I am loving the y-pipe bro!
That is to be expected. The XYZ pipe has larger diameter primaries than the stock Y pipe. Its a trade, but overall its a trade well worth doing.
In development, I also tested a 2.25" version of the XYZ pipe. It had a little more TQ in the 1500-3000 RPM range but then it lost about 2-3 HP over the rest of the curve above ~3500 RPM. 2.25" wasn't a good trade.
2.5" primaries provided the best overall results.
In development, I also tested a 2.25" version of the XYZ pipe. It had a little more TQ in the 1500-3000 RPM range but then it lost about 2-3 HP over the rest of the curve above ~3500 RPM. 2.25" wasn't a good trade.
2.5" primaries provided the best overall results.
Former G35driver Vendor
iTrader: (23)
Joined: Jul 2004
Posts: 3,054
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From: Los Angeles California
The first 2 feet of the primaries is the reactive part of the exhaust system. It is what determines the power curve slope angle.
Beyond 2 feet, the only thing that matters is the flow resistance. IE how free flowing it is. And flow resistance should be minimized to any practical extent possible.
Former G35driver Vendor
iTrader: (23)
Joined: Jul 2004
Posts: 3,054
Likes: 85
From: Los Angeles California
The resonated XYZ.
No. They can't be used together.
No. They can't be used together.
Sorry Tony...what i meant was if i take out the Y pipe off the HKS exhaust system, will the XYZ Y pipe work with the remainding HKS exhaust ie...the mid pipe to the exhaust ports.
