Performance work,
______________________________DYNAMIC PERFORMANCE______________________________
Over the last 2 years, I have researched and taugh myself the basics of port matching, polishing, and how to reshape Throtle bodies. Each time after learning more and finding new ideas, I would rework my own TB and see the results. I have reworked my 3.4L DOHC Throtle body three different times. After enjoying the benifit of my work, I saw the demand for this kind of work and desided to make one for resale. The two TB's i have sold are below. I have pictures of my TB as well. If you are interested in this kind of modification message me here or over at www.mymonte.com my Screen name is Digitallyphoenix.
GM 3100 SOHV V6 TB
Stats for performance improvement:
Not only does the smoothing of the TB increase flow at low RPM, the reduction/elimination of the Throtle bar increase cross sectional area for greater flow at WOT.
ex. The Stock 3100 TB is 52mm in dia. the normal swap is to the 3400 TB which is 57mm in dia. For all of the GM TB's the bar dia is 10mm high. From this we can calc the effective area for the tb. (A=Pi r^2)
Ae(area effective)=Ab (area of bore) -AB (area of bar)
Stock 3100
Ae=(Pi(52/2)^2)-(52 x 10mm)=676Pi-520= 1603 mm^2
Stock 3400
Ae=(Pi(56/2)^2)-(56 x 10mm)=784Pi-560= 1903 mm^2
After market 62mm TB for 3x00 apps
Ae=(Pi(62/2)^2)-(62 x 10mm)=961Pi-620= 2399 mm^2
My Mod'd 3100 TB with bar shaved to less then 2 mm thick.
Ae=(Pi(52/2)^2)-(52 x 2mm)=676Pi-104= 2019 mm^2
From this simple math, you can see that this mod will out flow the 3400 TB due to its larger Cross sectional area. Yes there are other factors that go into flow rate for the TB, but in general the larger the area the better the flow. Additionally flow velocities are normally highest toward the center of the TB. With the bar intact, more drag is produced due to the higher velocity of the incoming air.
Similar improvements are seen when performing this to the 3.4L DOHC below are the calculations.
Stock TB Dia 64mm
Ae=(Pi(64/2)^2)-(64 x 10mm)=1024Pi-640= 2577 mm^2
Normally Upgrade to 70mm
Ae=(Pi(70/2)^2)-(70 x 10mm)=1225Pi-700= 3148 mm^2
Mod's Stock TB
Ae=(Pi(64/2)^2)-(64 x 2mm)=1024Pi-128= 3089 mm^2
GM 3.4L DOHC V6 TB
Mitsubishi 2.5L SOHC V6 TB
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Custom Intake for a 95 dodge avenger
This intake will draw air from the cowl area thru a few holes in the fire wall. This area not only is a clean source of Cold air, it acts like a Ram air or Cowl inducted hood like used in the 60's. At speed the windshield develops a high pressure air build up and wants to go somewhere. This intake is the perfict place for this air.
