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 Milennia motor 
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Joined: April 09 2007, 8:11 AM
Posts: 912
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Post Re: Milennia motor
In my experience the difference between curve neck and straight neck ZE manifolds were minimal.

Also, I'd like to point out and question anyone who says they felt differences:

Did you change chips/flash your ecu to get the correct VRIS points? The KL31 VRIS and Curve neck VRIS are not wildly different, but they are a fair ways off.

4000 - 4800 - 6800
vs
3750 - 4250 - 6250

Whatever you end up doing - make sure VRIS points are set up otherwise you'll definitely feel that in your powerband :P

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March 24 2014, 7:07 AM
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Joined: August 11 2010, 11:34 AM
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Post Re: Milennia motor
Don't know how much you could consider this proof but:

140 - 200 (km/h) KL47 manifold 21 sec

140 - 200 (km/h) KLG4 manifold 20 sec

Only the manifold changed between runs, i'm running an mx-6 gearbox.


When doing the KLG4 run, it was warmer, i installed leather seats which where heavier, there was more gas in the tank (about 10 liter) + I had two gearboxes in the trunk. So i would say the KLG4 performs better.


March 24 2014, 1:55 PM
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Joined: October 08 2009, 5:35 PM
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Location: Eugene, OR
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Post Re: Milennia motor
In my own testing, I was using a chipped ECU with the curveneck VRIS points for both tests.

It was mostly intended to proof that fitment of a straightneck wasn't impossible, or nearly so, as many have claimed...

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'92 GS 5 spd - Straightneck KL, 67mm TB, MegaSquirt, Coilpacks, 5 lugs, Speed6 brakes, FD wheels, wiretuck, progressive coilovers, shorty headers w/ custom collector, AEM WB, 2.5" straight, Borla XS
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March 25 2014, 11:43 PM
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