why cant you jus cut the piece out that divide runners instead of rounding it then all the resrition is gone the runners would still be seperate ive seen people cut them out for the siemese why cant i do it with my set up? turbulance? mods in sig

------------------
1992 camaro RS
373 10 bolt rearend
ssm sfc's
87 350 TPI
bored 30 over
compucam 2032 with 1.6
482-495 LIFT 214-220 duration full roller rockers
msd6AL
1 5/8 headman headers
2 `1/2 flowmaster exuast
k&n filters gutter air box gutted maf
3 pc under drive pulleys
no emissions no egr etc
custom ED Wright chip
eddelbroc intake base and runners ported plenum
midly ported and polished stock heads
Taylor 8mm wires
B&M mega shifter
gutted maf/airbox
hotchkis lower control arms
3" exhuast cutout
homemade cold air intake
2000 tci stall
700R4 with B&M shift kit
new best ET 13.5 @104.66

 

There would be no advantage of this mod if your runners are not siamesed. As for turbulence,I don't think it would be a big deal either. Turbulence begomes a bigger factor once the air is in the runner and it's all going in one direction. The plenum already has lots of eddies and vortices due to its irregular shape.

Your only disadvantage is that you would have to either trim your gasket or leavea portion of it exposed to the inside of the plenum. About the biggest disadvantage I could see is that your plenum would possibly be more prone to vacuum leaks.

You would be better served to simply do a good gasket match, and thin the casting wall as shown in various tech articles on the web.


------------------
Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.

 

well the problem is all i have is a dremel it look as though it would be quicker jus to cut it out rather than taking the time to roumd it out but i diffenitly dont want to risk a vaccum leak thanks

comming this winter afr 195cc heads

------------------
1992 camaro RS
373 10 bolt rearend
ssm sfc's
87 350 TPI
bored 30 over
compucam 2032 with 1.6
482-495 LIFT 214-220 duration full roller rockers
msd6AL
1 5/8 headman headers
2 `1/2 flowmaster exuast
k&n filters gutter air box gutted maf
3 pc under drive pulleys
no emissions no egr etc
custom ED Wright chip
eddelbroc intake base and runners ported plenum
midly ported and polished stock heads
Taylor 8mm wires
B&M mega shifter
gutted maf/airbox
hotchkis lower control arms
3" exhuast cutout
homemade cold air intake
2000 tci stall
700R4 with B&M shift kit
new best ET 13.5 @104.66

 

just so you know 195 afr's wont fit a tpi manifold without modification.at least thats what afr told me when i ordered mine.
pete

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1990 Trans Am,350 TPI(L98),WS6suspension ,bridgestone RE71's /245/45/zr16
paxton supercharger, alston sfc's,msd 6AL-BTM,
8.5 superconductor wires SLP 1-3/4 headers,duel cats,3"slp exaust, lakewood LCA's,T.B.Bypass
160 degree stat,alum driveshaft,fiberglass wing, secret mods

"if you cant win fair CHEAT"