which throttle body/mass air?

J114 · 03-18-2005, 08:37 PM

Hi guys,
I need some advice on what size throttle body and mass air meter to go with. My car has BBK equal length shorties,BBk crossover pipe with high flow cats,flowmaster cat back system,mac cold air intake, and 3.55 gears.I am looking at the Pro M 75mm mass air, but not sure which throttle body. Will a 65mm be too small with aftermarket cam,intake and heads? I plan on installing these eventually. Will a 70mm be too big with out these mods? Any info would be greatly appreciated.

Dark_5.0 · 03-18-2005, 09:23 PM

Back when I had stock heads and intake I bought a 65mm TB. Now that I have some good heads/cam/intake I wish I had a 70mm TB.

If I had it to do over again I would start out with a 70mm TB.

tireburner163 · 03-19-2005, 01:25 AM

a 65mm TB is good to 450 hp.

I'd got with a 65mm TB and the 75MM Pro-M

tmoss · 03-19-2005, 12:19 PM

There won't be any significant power difference between a 65 or 70mm TB - buy the best one you find the cheapest.

fiveohpatrol · 03-19-2005, 06:10 PM

get a 75, despite what you will read in the magazines and hear from other mis-informed people, you really can't go too big with the throttle body. Its not a carburetor

tmoss · 03-19-2005, 10:50 PM

I doubt your intake will take a 75mm without porting and a 65-70mm will likely be more than you need and cheaper to buy.

J114 · 03-21-2005, 09:06 PM

Thanks for the input guys!

03-18-2005, 08:37 PM	#1
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	which throttle body/mass air? Hi guys, I need some advice on what size throttle body and mass air meter to go with. My car has BBK equal length shorties,BBk crossover pipe with high flow cats,flowmaster cat back system,mac cold air intake, and 3.55 gears.I am looking at the Pro M 75mm mass air, but not sure which throttle body. Will a 65mm be too small with aftermarket cam,intake and heads? I plan on installing these eventually. Will a 70mm be too big with out these mods? Any info would be greatly appreciated.

03-18-2005, 09:23 PM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Re: which throttle body/mass air? Back when I had stock heads and intake I bought a 65mm TB. Now that I have some good heads/cam/intake I wish I had a 70mm TB. If I had it to do over again I would start out with a 70mm TB. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

03-19-2005, 01:25 AM	#3
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Re: which throttle body/mass air? a 65mm TB is good to 450 hp. I'd got with a 65mm TB and the 75MM Pro-M __________________ 1987 Buick T-type 1998 HD Electra Elide

03-19-2005, 12:19 PM	#4
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: which throttle body/mass air? There won't be any significant power difference between a 65 or 70mm TB - buy the best one you find the cheapest. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

03-19-2005, 06:10 PM	#5
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Re: which throttle body/mass air? get a 75, despite what you will read in the magazines and hear from other mis-informed people, you really can't go too big with the throttle body. Its not a carburetor __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

03-19-2005, 10:50 PM	#6
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: which throttle body/mass air? I doubt your intake will take a 75mm without porting and a 65-70mm will likely be more than you need and cheaper to buy. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

03-21-2005, 09:06 PM	#7
J114 Registered Member Join Date: Aug 2003 Location: Airdrie, Alberta - Canada Posts: 28	Re: which throttle body/mass air? Thanks for the input guys!

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