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Old 10-05-2009, 08:03 PM   #11 (permalink)
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FYI: the the spacer has to do with Pulse tuning.
Essentially alows you the adjust (slightly) the peak efficiency area of the intake.

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Old 10-05-2009, 08:29 PM   #12 (permalink)
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Spacers and this honeycomb thing are two different things.
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Old 10-05-2009, 08:46 PM   #13 (permalink)
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Those tires/lift are probably why your mileage is so poor. The original was rated at 22 30 25 (city highway combined), and adjusted to 20 23 21 for the window sticker so 20+ should be possible. The best bang for your buck is installing a rear end from a carbed M4 2WD of the same year/s. It was rated for 30 40 34 unadjusted and 27 31 29 adjusted.
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Old 10-15-2009, 06:02 PM   #14 (permalink)
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honeycomb

I think that once the mixture is through the venturi,past the throttle plate,and into the plenum of the intake manifold,it's got plenty of turbulence to help entrain any droplets that might be present,and the whole charge will be blasted to smitherines, once past the intake valve and into the combustion chamber.
I suspect that the honeycomb would only serve as a restriction and might actually interfere with some of the charge' ability to turn down the runners.
A normal spacer ( which is wide open ) adds length to the plenum,which aids in "turning" the charge along a larger radius and can help prevent "wet out" on the floor of the plenum,something the matrix of the honeycomb might aggravate.
I'd shy away from the device.
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Old 03-04-2010, 07:17 PM   #15 (permalink)
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go to www.mpgresearch.com and search for screen under carb. Or,http://www.gofastnews.com/board/engi...b-booster.html

Last edited by sc2dave; 03-04-2010 at 10:41 PM..
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Old 03-05-2010, 01:26 AM   #16 (permalink)
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Don_Kendons_Intake_Scrolls : Don_Kendon's_Intake_Scrolls
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Old 03-08-2010, 07:10 AM   #17 (permalink)
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Here is something from mpgresearch.com....

85 22R Toyota carbed ...96 HP....85 EFI....116 HP

I've been making the same effort with my '88 Toyota
4wd 5speed with 222K miles and I manage between 27.5
and 29.7mpg. This includes some city driving, perhaps
25%, and some hauling, perhaps 15% of the time and up
to ~ 3/4 ton in the back: truck weighs ~3,800
unwashed, rust bucket and lots of tools behind the
seat. Those are also pretty good numbers but, now,
with the Saturn, I hope to use the Toyota only for
what it does best: hauling/mud and snow work.

Best I can do with an '86 Nissan EFI 4x4 is 25 mpg highway...in summer.

If the truck has not been maintained...such as lubed and tuned up...you can gain some there. I'd put a pint of water into the carb (slowly) to decarbon it...flush the oil with a pint of kerosene for 15 mins...advance the ignition some....lube the driveshafts...check the gear oil levels and / or replace....up the tire pressures.

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