What size Throttle Body??

PonyXpress · 09-03-2006, 12:42 AM

Hey everyone, hope your having a great Labor Day weekend! I want some opinions on throttle body size for my 89 5.0, I currently have an E-303 cam with GT-40 heads, Cobra intake and 24# injectors with a 65MM Throttle body, I plan on ditching the GT-40's for the AFR 165's (some real badass heads from what I have read), so my question is what size throttle body should I go with?? Should I stick with my 65mm, go with 70 or even 75MM??? Your opinions are appreciated

THANKS!

Dark_5.0 · 09-03-2006, 02:05 AM

Quote:

Originally Posted by PonyXpress

Hey everyone, hope your having a great Labor Day weekend! I want some opinions on throttle body size for my 89 5.0, I currently have an E-303 cam with GT-40 heads, Cobra intake and 24# injectors with a 65MM Throttle body, I plan on ditching the GT-40's for the AFR 165's (some real badass heads from what I have read), so my question is what size throttle body should I go with?? Should I stick with my 65mm, go with 70 or even 75MM??? Your opinions are appreciated

THANKS!

I have about the best flowing heads possible(Ported 192cc Canfields) with a ported cobra intake and a huge Ed Curtis .566 lift custom grind cam and my 65mm TB still isnt a bottle neck.

I borrowed a 70mm TB and it ran exactly the same.

Stick with the 65mm unless getting a bigger one will make you feel better somehow.

The cobra intake will choke your engine way before the 65mm throttle body will.

Coupe50h · 09-03-2006, 01:02 PM

So true dark5.0, I run a 65, all i need till like 450 hp probaly.
I like my ported gt-40 heads, but i rode in a car similair combo to mine with some afr 165's and a f-cam, that combo is really alive! pulled hard up top, and this same particular guy ran a 13.1 108 on worn khumo radials.
So save money on the tb, and put it towards some afr's.

09-03-2006, 12:42 AM	#1
PonyXpress Registered Member Join Date: Jan 1999 Location: Denver, CO Posts: 26	What size Throttle Body?? Hey everyone, hope your having a great Labor Day weekend! I want some opinions on throttle body size for my 89 5.0, I currently have an E-303 cam with GT-40 heads, Cobra intake and 24# injectors with a 65MM Throttle body, I plan on ditching the GT-40's for the AFR 165's (some real badass heads from what I have read), so my question is what size throttle body should I go with?? Should I stick with my 65mm, go with 70 or even 75MM??? Your opinions are appreciated THANKS!

09-03-2006, 01:02 PM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: What size Throttle Body?? So true dark5.0, I run a 65, all i need till like 450 hp probaly. I like my ported gt-40 heads, but i rode in a car similair combo to mine with some afr 165's and a f-cam, that combo is really alive! pulled hard up top, and this same particular guy ran a 13.1 108 on worn khumo radials. So save money on the tb, and put it towards some afr's. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

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