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kevin · Post by **kevin** » Sat Apr 16, 2005 10:58 pm

The taper will help increase the velocity(i think) but there is still not enough vertical height. This was a big problem in especially in the GTV3.0l carb airboxes . Strainge you mention stubs inside as we have never seen thje 75 and some of my plennums have stubs and others dont as for example the two I used which both came of GTV2.5's.
Elaborate on your last comment as your plennums on your 3.8 also taper for increased airflow from the furthest point away from the inlet(opening).

Post by **Zamani** » Sat Apr 16, 2005 11:07 pm

Why would cyl 1 & 4 run lean? If there are flow problems (less flow) for the further cylinders, wouldn't they run rich then? Less air but same amount of fuel. No?

Giulietta24vTT · Post by **Giulietta24vTT** » Sun Apr 17, 2005 10:56 am

Zamani wrote:Why would cyl 1 & 4 run lean? If there are flow problems (less flow) for the further cylinders, wouldn't they run rich then? Less air but same amount of fuel. No?

Just like Z said , same fuel less air , there would probably be a tendency for richer mixture at those two....?

junglejustice · Post by **junglejustice** » Sun Apr 17, 2005 8:50 pm

No, it's my understanding that 1 and 4 run lean... Something to do wih the increased air-speed/same volume of air flowing through a smaller area....

Using these plenums with the turbo cars is great, because the boost equalizes the pressure inside of the plenum and the forced induction feeds the cylinders equally...

What I meant by the comparison to the 3.7 plenums is that there is a larger area where the air is forced in... Dawie actually changed the size of the plenums from the first run to make up for this issue.

pancho · Post by **pancho** » Thu Dec 21, 2006 4:48 am

Going through old posts - Kev - what ever happened with this anyway ? more power ?

kevin · Post by **kevin** » Sun Dec 24, 2006 10:21 am

I Did not go to a dyno before and after to compare on the plennum but it feels better(throttle response) and makes sense. Maybe its an illusion and Im trying to believe its better. Hey it looks better!

kevin · Post by **kevin** » Sun Dec 24, 2006 10:21 am

I Did not go to a dyno before and after to compare on the plennum but it feels better(throttle response) and makes sense. Maybe its an illusion and Im trying to believe its better. Hey it looks better!

kevin · Post by **kevin** » Fri Jun 08, 2007 1:10 pm

Just finished a plenum for the 3.7L. Barry made some "ram" tubes which I have incorporated this time. Instead of hole sawing into the plenum a new plate with the tubes was welded directly into it. Not sure if it was easier this way as they are both difficult. Hey Baz post some pics of those intake runners you have just done. Probably the coolest things you will see on this forum. Pic to follow.

kevin · Post by **kevin** » Fri Jun 08, 2007 1:13 pm

Check inside. No comments of vertical room - been there before !

Barry · Post by **Barry** » Fri Jun 08, 2007 10:46 pm

Hey ,came out nice Kev..
The bellmouths are not ideal,but they are better than no bell mouths at all..
The intakes are in for chroming,so Ive only got work in progress pics for now.

bteoh · Post by **bteoh** » Sat Jun 09, 2007 6:17 am

Nice work Barry

rz · Post by rz » Sat Jun 09, 2007 7:57 am

hi barry,
looks like my engine?
drooooool.....
i think i am going to kiss you when the engine is here.

pancho · Post by **pancho** » Sun Jun 10, 2007 1:33 am

top work B, more pics and info pls !

Barry · Post by **Barry** » Tue Jun 12, 2007 8:30 am

Typical of companies here..Yes sir,collect on Monday!.Ok,so its only tuesday and I collected the runners from my plating guys..

Wow!!!!!!They did an exceptional job!!I mentioned it was for export and they shined!The runners and the company!!

Barry · Post by **Barry** » Tue Jun 12, 2007 8:31 am

Mike,Been having problems uploading multiple pics lately...help..