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tri power for dummies

June 24 2007 at 9:20 PM
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  (Login bestrada11)
from IP address 198.68.30.6

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Is there a munual out that has alot of info on building tripower? I see haynes has a rochestor 1 2 and 4 barrel manual but im thinking this a more for stock type applications. And ive seen the chevy and pontiac disks for sale on ebay. but im doing an edelbrock tripower on a lincoln 430 and i just want to make sure i am doing all the little tricks and modifiying the carbs where they need to be?? Just basically a tripower for dummies is all im looking for??

 
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AuthorReply

(Login acc7484)
208.215.238.2

Lincoln Tri-Power

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June 25 2007, 6:01 AM 

I do have a factory Manual somewhere ...??
However, the one critical adjustment is the throttle plate clearance on the front and rear carbs. ....This is critical because the clearance allows enough air flow to tip open the plates at the correct RPM. If the plates are closed completely They could open too late .......

1959 Lincoln Tri-Power Coupe
1959 Lincoln Rag-Top
1959 Lincoln 4-Door (Parts)

 
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(Login bestrada11)
198.68.30.6

Re: Lincoln Tri-Power

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June 25 2007, 9:27 PM 

The only thing is that might be true for a stock tri power but mine is an aftermarket edelbrock and the progressive linkage is supposed to open the end carbs only after half way open.. im more concerned about modifing the end carbs to work this way.. basically no idle circuit just dumpers when mashed down....

 
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(Login KULTULZ)
MEL Forum Moderator
69.140.42.35

What Carb Are You Using?

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June 30 2007, 12:46 AM 

The easiest description is to close the throttle plates on the end carbs completely (also unhook end linkages)and adjust the center carb to allow proper idle/acceleration. The idle circuits should be defeated (on end carbs) but not the accelerator pumps. Then hook the end linkages and adjust for desired cut-in (opening) at whatever RPM/ road speed desired.

If using Rochester carbs, follow any GM TRI-POWER instructions as the engine does not know what type of carb it has.

The other poster by describing end carb throttle plate adjustment is to allow for proper transition from idle to power circuit.
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One misconception of the FE tri-power is it is over carbureted for 390 and smaller displacement FE's. One must realize 2v and 4v carbs are flowed differently. 2v carbs are flow tested at a pressure of 3" and 4v carbs are flow tested at 1.5". To make an accurate comparison of a 2v VS 4v carb take the total cfm of the 2v and divide by 1.414. Example: Total cfm rating of most FE tri-power carbs (List #2436/2437) is 1030 cfm. 330 cfm primary + 350 cfm each outboard = 1030 cfm divided by 1.414 = 728 cfm.

1030/1.414 = 728

As one can see if comparing the tri-power system to a single 4v intake system the tri-power is equal to a single 4v intake with approximately a CJ carb that is 730 cfm. Ford did the homework, and rather well at that!

From HP TRENDS- http://www.hptrends.com/carbtech.htm

Source of 2GC Information- http://cgi.ebay.com/ebaymotors/Rochester-TRI-POWER-Carburetor-Service-Repair-Manual_W0QQitemZ260132277676QQihZ016QQcategoryZ34198QQcmdZViewItem




    
This message has been edited by KULTULZ from IP address 69.140.42.35 on Jun 30, 2007 12:58 AM


 
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