65mm or 70mm throttle body for my setup?

Z

Zorro

Founding Member

Jan 21, 1999

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LOS ANGELES

Oct 24, 2007

#1

• Oct 24, 2007

• #1

Hey everyone! I am gathering parts for my setup. Going to install AFR 165s. b303 cam, and an edelbrock performer intake=what size throttle body from ford racing do I go with 65 or 70? edelbrocks website says to go with the 70mm "for optimum performance. I always thought a 65 was plenty for a mild street combo. Thanks for any help!

 

bloopbloob

Member

Sep 27, 2006

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Alberta

Oct 24, 2007

#2

• Oct 24, 2007

• #2

just match your tb to your intake if you don't plan on more mods in the future. a larger tb will hurt throttle response slightly if the rest doesn't match. i'm running a 70mm tb on a stock intake, but i plan on doing a lot more engine mods in the future, so i'm not worried about it. it is port matched to the stock intake though(a LOT of grinding BTW), but it's not the best for what i am running now.

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Oct 24, 2007

#3

• Oct 24, 2007

• #3

70mm is the ticket

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

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Arkansas

Oct 24, 2007

#4

• Oct 24, 2007

• #4

65 is plenty, but the 70mm throttle body is the same size opening as the Performer intake opening. To bad it necks down to less than 65mm in the intake tract anyways

It is just a 'general rule.'

 

ShortThrow50

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Oct 22, 2006

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Pa

Oct 24, 2007

#5

• Oct 24, 2007

• #5

70mm is the ticket. Its a happy medium

 

ninety15.0

New Member

Mar 10, 2004

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Oct 24, 2007

#6

• Oct 24, 2007

• #6

I think the 65 will be more than enough for your combo...however the intake is matched for a 70mm TB so i would go with that.

You will likely notice a change in off idle throttle response with the larger TB...but nothing too negative. should be a strong running combo...

However if i were you i would save the money for the TB and use it towards a custom cam. The stock TB wont hurt you as much as a custom cam would gain you. Or you can try to find a used 65mm explorer TB for cheap AND get the custom cam!

If i would have known better when i put my combo together i most definitely would have gotten a custom cam! good luck man

 

fastford91

New Member

Aug 15, 2006

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Niagara ,Ontario, Canada

Oct 24, 2007

#7

• Oct 24, 2007

• #7

go with 70 i have 75mm on mine itll be good!

 

B

BYRDPE

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Nov 4, 1998

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Memphis,Tn.

Oct 24, 2007

#8

• Oct 24, 2007

• #8

fastford91 said:

go with 70 i have 75mm on mine itll be good!

Click to expand...

:OT:
Reading your sig I didn't see a blower but you are running 42 lb injectors?
Doesn't your car run too rich?

 

samickguy15

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Sep 1, 2005

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Delavan, IL

Oct 24, 2007

#9

• Oct 24, 2007

• #9

BYRDPE said:

:OT:
Reading your sig I didn't see a blower but you are running 42 lb injectors?
Doesn't your car run too rich?

Click to expand...

Probably has a tuner or a MAF calibrated for them. Either that or he's running super low fuel pressure.

 

fastford91

New Member

Aug 15, 2006

254

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Niagara ,Ontario, Canada

Oct 24, 2007

#10

• Oct 24, 2007

• #10

samickguy15 said:

Probably has a tuner or a MAF calibrated for them. Either that or he's running super low fuel pressure.

Click to expand...

have both! and im going to be getting the vortech!

 

B

BYRDPE

Founding Member

Nov 4, 1998

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Memphis,Tn.

Oct 24, 2007

#11

• Oct 24, 2007

• #11

fastford91 said:

have both! and im going to be getting the vortech!

Click to expand...

Congrats...
I want to get blown.

 

ninety15.0

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Mar 10, 2004

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Oct 25, 2007

#12

• Oct 25, 2007

• #12

who doesnt

 

Merrickd

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Nov 14, 2000

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Madison/Janesville,WI

Oct 25, 2007

#13

• Oct 25, 2007

• #13

I have a 70 on my FTI,AFR 165, RPM combo and throttle response is great! I have run consistant 12.60's without much tuning.