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Gasser Manifold(s) Upgrade - Pictures
by
79rabbit4dr
on 21 Apr, 2009 13:40
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I've got a set of intake and exhaust manifolds from an MKI gasser that I want to retrofit onto my 1.6l NA diesel at the same time i'm doing my head gasket replacement - might as well. The trouble i'm running into is mostly just how to set up an intake system off the gasser intake manifold since there used to be a throttle body there. I've got pictures of the head (removed) with the stock diesel exhaust set up and then the gasser set up bolted in place. Who has done this and can post pictures of the end result, or better yet the entire process? Here is what i'm working with.
the manifolds, gas on the left, diesel on the right;
the head;
w/ the diesel mani's;
the gasser mani's;
where the throttle body bolts up;
will I have to plug these, remove them, what to do?;
HELP! :oops:
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#1
by
79rabbit4dr
on 21 Apr, 2009 13:47
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oh, and I DO have the gasser throttle body, but even if I gutted it I think all the restrictions would just about cancel out any gains the manifold would produce, correct?
TB;
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#2
by
truckinwagen
on 21 Apr, 2009 13:52
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for an NA use the diesel manifold, the gasser one is only an upgrade over the turbo diesel one.
I would use the diesel intake and the gasser exhaust, as it kicks the butt of the diesel one.
if you do use the gasser manifold the extra ports will have to be plugged, I tapped and plugged mine with pipe plugs, but for NA, you could probably just get some rubber caps for them.
as for the throttle body, I got a hole cut in a rectangular piece of steel and welded a piece of exhaust tubing into it to attach the intake plumbing to
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#3
by
Baxter
on 21 Apr, 2009 14:25
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#4
by
79rabbit4dr
on 21 Apr, 2009 14:31
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any info on that adaptor?
EDIT:
saw you other thread, "Custom inlet manifold adapter in 2 1/4" to suit charge cooler piping"
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#5
by
Baxter
on 21 Apr, 2009 14:37
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I had it made, seals with an O-ring, just like the plastic one I took off.
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#6
by
truckinwagen
on 21 Apr, 2009 14:42
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I would still say that the gasser intake is only an upgrade on a turbo diesel, very few manifolds can beat the NA one for intake restriction.
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#7
by
79rabbit4dr
on 21 Apr, 2009 14:48
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so I should just hang on to it until the day I TD it?
I just hate the plastic front part with those dumb clips. Would replacing the square filter inside for a cold air intake style one at the tip mess with air distribution to each cylinder?
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#8
by
idgtd
on 21 Apr, 2009 14:51
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I would still say that the gasser intake is only an upgrade on a turbo diesel, very few manifolds can beat the NA one for intake restriction.
I agree. The A1 gasser intake is one of the bottlenecks on the gas engines. The NA diesel intake manifold has larger runners that all open into a huge plenum volume. But who knows? Maybe the subject of a dyno comparison?
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#9
by
truckinwagen
on 21 Apr, 2009 14:51
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no, using the gasser manifold wont mess anything up, and if you intend to turbo it someday then putting the manifold on now is no problem.
I was just saying that you probably wont see any performance increase on an NA motor by throwing the gasser manifold on there.
as for the filter, you are right, being able to use a cone filter and get rid of the panel would definitely be a bonus, even if it doesn't get you any HP
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#10
by
burn_your_money
on 21 Apr, 2009 15:44
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I would use the diesel intake and the gasser exhaust, as it kicks the butt of the diesel one.
That's what I would (and will) do
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#11
by
RabbitJockey
on 21 Apr, 2009 16:04
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yea but i'd definitely add a bigger snorkel. from what i have read too the diesel toilet bowl manifold actually has a bigger outlet on it than the gas toilet bowl and there isn't much of a gain from the swap. good luck either way, i remember when my na had an exhaust, it was terribly loud and very unique sounding. na's are loud cars tho, my rabbit with stock exhaust is much louder than my td with a techtonics exhaust
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#12
by
truckinwagen
on 21 Apr, 2009 16:13
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the gasser dual outlet ex manifold is definitely an upgrade over the stock diesel (and gasser) single outlet manifolds.
the gasser intake will not flow as well as the NA diesel one, but will allow the use of a cone filter(which is nice in itself)
the NA cars are louder because they don't have the turbo acting as a muffler for the exhaust and the intake.
if you take the front off the NA airbox it gets LOUD!
do whatever, if you plan on going turbo at some point putting on the gasser intake now would probably be a good idea as it would make one less thing to have to do later.
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#13
by
79rabbit4dr
on 21 Apr, 2009 18:28
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I was under the impression that both mani's would be upgrades from the stock diesel manis. When I do turbo it, i'll be pulling the whole motor so it won't be a big issue to put the gasser intake on then... and I may just get an aftermarket intake anyway... who knows.
Diesel intake and gasser exhaust it is... my wife will be happy about that since it means getting back to having the extra car sooner - since I don't have to fab up an adapter plate for the gasser intake.
Thanks guys!!! I'll post more pix of the final setup later tonight/tomorrow.
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#14
by
maxfax
on 21 Apr, 2009 18:53
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Is this what you were thinking about when you mentioned eliminating the paper filter and using a cone filter?
I gotta get a better filter that fits properly but it seems to work okay as is, and no having to fight the plastic air box to change the air filter!!! I glued rubber vac line to the plastic to act as a gasket for the air box, easier than trying to cut the foam seal off an old filter... Pulled the little snorkel thing out of the box and jammed the rubber line on there and clamped it.. The rubber was the intake pipes from an older F-150, has the spring inside to keep it from collapsing...
