 Hole in Throttle Body Flap, Needed or Not |
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| 914Sixer |
 Oct 4 2022, 08:32 PM
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914 Guru  Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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So I bought a big bore throttle body a while back and just got around to comparing it to the stock one. Stock body has a hole in it. What is the function of the hole? To keep the idle stable? Do I need to put one in big bore? Inquiring minds want to know.
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| DRPHIL914 |
Oct 13 2022, 03:34 PM
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Dr. Phil Group: Members Posts: 5,766 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(914Sixer @ Oct 12 2022, 07:42 AM)  Using D-Jet on with MPS tuned by Jeff B. Engine is 2056 with Elgin cam with slightly more lift and Hoffman heads. QUOTE(ClayPerrine @ Oct 13 2022, 03:40 PM) QUOTE(r_towle @ Oct 12 2022, 07:17 PM) You do not need a larger throttle body all the way up to 2.4 on djet. Tuned on a dyno Fact If it is a 1.7L D-Jet, you need a bigger throttle body. The 1.7L throttle body is a little bitty bugger. If it is a 2.0L D-Jet, you don't necessarily need a bigger throttle body, but it can make it a bit more peppy. i have a similar set up , 2.1 9.5compression, d-jet, and i installed this summer a 49.5mm throttle body, bored out stock '73 2.0 TB from Chris Foley, I can tell you it does make a difference from mid to high end for sure . With the modified cam, conter balanced crank and new heads with larger valves ported and polished, it all makes a difference so with these other changes, more air coming in helps on that top end where it felt before like it was not getting enough. Id like to do a before/after dyno but i dont have that ability. Seat of the pants evaluation says it does. |
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Posts in this topic
914Sixer Hole in Throttle Body Flap Oct 4 2022, 08:32 PM
rjames To an old thread on the topic.
http://www.914wor... Oct 4 2022, 09:30 PM Superhawk996 Comparing apples to oranges. Do not drill a hole.... Oct 5 2022, 06:44 AM
ClayPerrine
Comparing apples to oranges. Do not drill a hole... Oct 5 2022, 08:47 AM Superhawk996
I am not an engineer, but I do understand engin... Oct 5 2022, 09:31 AM ClayPerrine
I am not an engineer, but I do understand engi... Oct 5 2022, 09:53 AM SirAndy The "big bore" looks smaller than the st... Oct 5 2022, 09:42 AM 914Sixer Just the way the picture looks. Oct 5 2022, 01:30 PM Geezer914 What did the larger throttle body come off of? MM... Oct 5 2022, 01:52 PM VaccaRabite
What did the larger throttle body come off of? M... Oct 11 2022, 06:55 AM 914Sixer Using D-Jet on with MPS tuned by Jeff B. Engine i... Oct 12 2022, 05:42 AM r_towle
Using D-Jet on with MPS tuned by Jeff B. Engine ... Oct 12 2022, 06:17 PM ClayPerrine
You do not need a larger throttle body all the w... Oct 13 2022, 01:40 PM Rand "The hole." Answer me this:
Can't th... Oct 12 2022, 08:42 PM |
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