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Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: V8Demon on October 12, 2005, 07:58:19 AM

Poll
Question: What size TB should I go with?
Title: What size TB should I go with?
Post by: V8Demon on October 12, 2005, 07:58:19 AM
As some of you may have read,  I'm installing the Trick Flow top end kit on the 5.0.  I got the street heat intake rated for 0-5500 RPM's as an optimum runnning range.  I'm going 24#'s on the injectors and was just trying to get a feel of what size TB I should go with.  I'm 90% set on a 70mm.  Just wanted some opinions on it.....
Title: What size TB should I go with?
Post by: Haystack on October 13, 2005, 02:35:43 AM
I am leaning twoard 65,.... But after seeing that you have hit 13's you might be able to handle a 70 possibly a 75 fine. I would shoot for 70 even though I already voted for 65.
Title: What size TB should I go with?
Post by: The Hawk on October 13, 2005, 05:40:49 PM
65mm....plenty big and will support lots of power....plus it will have better throttle response. Don't bother with a 70mm unless you run a blower.
Title: What size TB should I go with?
Post by: Blown306Cougar on October 13, 2005, 06:38:19 PM
Quote from: The Hawk
65mm....plenty big and will support lots of power....plus it will have better throttle response. Don't bother with a 70mm unless you run a blower.


amen.... at least someone else said it besides me ;)
Title: What size TB should I go with?
Post by: The Hawk on October 16, 2005, 10:52:47 PM
Yep....The "bigger is better" rule does not apply here because contrary to what some think, you can "over-TB" a fuelie engine to hurt low end performance... a 65mm will easily support block splitting power levels.
Title: What size TB should I go with?
Post by: vinnietbird on October 17, 2005, 12:50:38 PM
I was running a 65,and for my modest mods,I had to go back to a 60.Much better.Perhaps after I get the GT40 heads,the 65 will go back on.
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