bikinilust

iTrader: (9)

what exectly did you do to the lower? I see that you smoothed everything out and removed castings and text. But did you lower the front runners?

Cide

iTrader: (1)

i lowered the all of them in the same slope pattern that the top plenum has.

Cide

iTrader: (1)

U cant really tell from the pics but i took off a good amount from the front runner but i also lowered the others. i thought i'd try something diff so i lowered them in a downward slope like the top plenum does to get a better even flow all round..... Finaly got it on the other day took me prety much the whole day cuz i decided since i was in there i might as well get creative.. so i painted my throttle body to match the manifold and also replaced my valve cover gaskets and painted the covers red... right after i finished i cleaned up, made sure everything ran good, and took it on a 1 hour drive at about 80-85 mph and everything held up awesome... gains via dyno butt r noticable but it could just be in my head.. my g.f did notice it sounds a tad meaner.. and im getting about 1 mpg more than b4 so thats always good.

Cide

iTrader: (1)

hey anyone ever tried porting the rev up lower plenum?

Jeff92se

iTrader: (4)

........

SexyRob

iTrader: (11)

I'll try to keep this alive, would be great if some of the people who inspired me could come back and give us all a check up...

Casting Surface

Big casting flaw

Grinded off the top of the front runners

Before I started grinding

After around 30 mins

more than an hour of grinding at 80 grit

another 30 minutes at 120 grit

attempting to grind around the curve

eltness350

iTrader: (58)

lookin good!

Cide

iTrader: (1)

good job man i can tell u have better tools for the job than i did. should come out good.

LSX-PWR

I gasket matched the runners and ported the rest or the intake. I'm thinking of selling it though, reason being im putting a LSX in my Z.

SexyRob

iTrader: (11)

Finished Lower Runners

bikinilust

iTrader: (9)

what kind of tools did you use?
Air grinder w/sanding pads n sanding drums?

SexyRob

iTrader: (11)

combination of: a sanding porting/polishing kit from summit racing, a surface prep kit for air tools, sandpaper of various grits, a dremel with flex line and a rotozip, and a couple ingenious ways of putting them all together.

bikinilust

iTrader: (9)

whats the surface prep kit.
I pretty much have all of those items minus the summit kit, which ive seen for a very reasonable price.

Any tips?

And how does the butt-dyno feel after all these mods are said n done?

thanks

SexyRob

iTrader: (11)

got the surface prep kits at lowes/homedepot near the air compressor equip

this is still a work in progress. I have a dyno day scheduled on the 13th of December where I hope to have a before and after reading. I will compare the stock Throttle body>Upper Plenum>Lower Plenum>Runners to my modified versions.

bikinilust

iTrader: (9)

what was your method for bringing down the tops of the front 2 runners consistantly?
Which tools did you use?

SexyRob

iTrader: (11)

put the surface prep kit on the rotozip and used the roughest pad for like 30 minutes

bikinilust

iTrader: (9)

you used a measuring caliper before and after, right?
How much did you bring down the tops of the 2 front runners?
I have yet to do that portion of the project due to not knowing how much to bring it down.

bikinilust

iTrader: (9)

which kit did you go with?
http://www.summitracing.com/search/?...porting&page=1

Also, what was the final grit that you used? Im thinking to leave the whole thing a little rough, like maybe 120 grit....

SexyRob

iTrader: (11)

think its this one, http://www.summitracing.com/parts/SAI-260006/

didn't really check to see how much to bring it down, I just did what looked right. I was conservative in my decision since I figured a little was better than nothing but too much could be very bad.

I'm not done yet but I think I will finish off with 150 or 220 by hand.

bikinilust

iTrader: (9)

how did you do on the runners of the lower plenum?
I think i tried it like a year ago, n from what i remember the turn made it difficult.
I believe flapper style sanding bits worked best on those turns.