78mm throttle body?
03-11-2012, 03:52 PM
#41
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
marvelous! thats what i was looking for, so with that being said, i think ill just go with the 78mm tb if it wont hurt it, save some dough, and also i have the option of going the F/I route! thanks alot for that explanation. and also those stripes on your stang look SO BAD ***, where did you find those!? i would love set for mine.
The stripes came from a local vinyl sign shop, just scraps the fellow gave me. I cut into 2" strips and applied them with soapy water and a squeegee like any decal/stripe/window tint...
03-11-2012, 06:56 PM
#42
1st Gear Member
Join Date: Jan 2012
Location: North Carolina
Posts: 62
ahh ok
I thought I had been clear, it will hurt performance just not to any significant extent. Also when running f/i the TB size is of less importance because the entire nature of the intake airflow is so radically changed.
The stripes came from a local vinyl sign shop, just scraps the fellow gave me. I cut into 2" strips and applied them with soapy water and a squeegee like any decal/stripe/window tint...
The stripes came from a local vinyl sign shop, just scraps the fellow gave me. I cut into 2" strips and applied them with soapy water and a squeegee like any decal/stripe/window tint...
03-11-2012, 07:38 PM
#43
TECH SAVANT
Join Date: Dec 2006
Location: Saint Augustine, FL
Posts: 10,938
You can get a Pro Products/Trick Flow (they are the same) TB and plenum for $220 or so if you shop around--that's what I am running:
If you do decide to go f/i down the road you can probably get $125 for them used--or just get a 75 mm TB and keep the plenum, and sell the 70 mm TB for $75. Most people don't know the plenum is the weak link, so they will pay more for the TB alone than for the plenum--make used plenums a real good deal...
If you do decide to go f/i down the road you can probably get $125 for them used--or just get a 75 mm TB and keep the plenum, and sell the 70 mm TB for $75. Most people don't know the plenum is the weak link, so they will pay more for the TB alone than for the plenum--make used plenums a real good deal...
Last edited by cliffyk; 03-11-2012 at 07:40 PM.
03-11-2012, 10:21 PM
#44
1st Gear Member
Join Date: Jun 2011
Location: Arizona
Posts: 57
FWIW, my 2¢ worth...
78mm is too big for any non-intake/cam/heads n/a engine--you will lost charge velocity at WOT up to 5k rpm or so and that will cost you power.
The OEM 65mm was chosen to maintain charge velocity to boost efficiency (think fuel economy) however it is a bit too small for 5k+ rpm. A 70 is 20% higher capacity then the OEM unit and is all that's needed to get things flowing strongly up to red line, without hurting anything.
A 75mm TB is 40% larger than stock, the 78 is 50% larger--great for n/a but less than optimal for a bolt-on n/a engine...
78mm is too big for any non-intake/cam/heads n/a engine--you will lost charge velocity at WOT up to 5k rpm or so and that will cost you power.
The OEM 65mm was chosen to maintain charge velocity to boost efficiency (think fuel economy) however it is a bit too small for 5k+ rpm. A 70 is 20% higher capacity then the OEM unit and is all that's needed to get things flowing strongly up to red line, without hurting anything.
A 75mm TB is 40% larger than stock, the 78 is 50% larger--great for n/a but less than optimal for a bolt-on n/a engine...
Sorry about this being completely off topic, but I just wanted to tell you that I love your steering wheel :P
03-12-2012, 08:45 AM
#45
1st Gear Member
Join Date: Jan 2012
Location: North Carolina
Posts: 62
You can get a Pro Products/Trick Flow (they are the same) TB and plenum for $220 or so if you shop around--that's what I am running:
If you do decide to go f/i down the road you can probably get $125 for them used--or just get a 75 mm TB and keep the plenum, and sell the 70 mm TB for $75. Most people don't know the plenum is the weak link, so they will pay more for the TB alone than for the plenum--make used plenums a real good deal...
If you do decide to go f/i down the road you can probably get $125 for them used--or just get a 75 mm TB and keep the plenum, and sell the 70 mm TB for $75. Most people don't know the plenum is the weak link, so they will pay more for the TB alone than for the plenum--make used plenums a real good deal...
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