70mm vs. 75mm Accufab?
11-23-2005, 03:59 AM
#1
2nd Gear Member
Thread Starter
Join Date: Apr 2005
Location:
Posts: 191
70mm vs. 75mm Accufab?
I am ready to order a C&L intake kit with the 85mm MAF, TrueFlow intake pipe and a matching Accufab throttle body and plenum. My question is about the throttle body size.
I had someone at Mustang Tuning tell me that for a non-turbo or supercharged engine that I should NOT go larger than 70mm. He said that there is actually a minor loss of performance by going from a 70mm to the 75mm UNLESS you are forcing air into the engine with a turbo or supercharger.
I'm looking for an experienced reply to that.
There is only about a $10 difference, so that's no big deal. I would just like to know which size will perform better and resell better.
Thanks.
I had someone at Mustang Tuning tell me that for a non-turbo or supercharged engine that I should NOT go larger than 70mm. He said that there is actually a minor loss of performance by going from a 70mm to the 75mm UNLESS you are forcing air into the engine with a turbo or supercharger.
I'm looking for an experienced reply to that.
There is only about a $10 difference, so that's no big deal. I would just like to know which size will perform better and resell better.
Thanks.
11-23-2005, 04:36 AM
#2
3rd Gear Member
Join Date: Jun 2005
Location: Illinois (Tinley Park)
Posts: 760
RE: 70mm vs. 75mm Accufab?
I have seen the flow charts for the throttle body size and the info you got from Mustang Tuning sounds accurate. Do a search for throttle body flow and you should find it.
11-23-2005, 10:34 AM
#3
5th Gear Member
Join Date: Feb 2004
Location:
Posts: 2,028
RE: 70mm vs. 75mm Accufab?
MM&FF did a test using both sizes and the 75mm won out by a couple of horses.I have a 75mm set-up and it makes me happy.The 70mm is probably adequate with a stock engine but if you plan on upgrading heads,cams,or exhaust later on you might want to go with a bigger set-up.Since there's no penalty to go bigger right now,why not?
11-23-2005, 01:34 PM
#4
3rd Gear Member
Join Date: Aug 2005
Location:
Posts: 984
RE: 70mm vs. 75mm Accufab?
ORIGINAL: Chopper
MM&FF did a test using both sizes and the 75mm won out by a couple of horses.I have a 75mm set-up and it makes me happy.The 70mm is probably adequate with a stock engine but if you plan on upgrading heads,cams,or exhaust later on you might want to go with a bigger set-up.Since there's no penalty to go bigger right now,why not?
MM&FF did a test using both sizes and the 75mm won out by a couple of horses.I have a 75mm set-up and it makes me happy.The 70mm is probably adequate with a stock engine but if you plan on upgrading heads,cams,or exhaust later on you might want to go with a bigger set-up.Since there's no penalty to go bigger right now,why not?
That is his question. Someone informed him that there IS a penalty.
11-23-2005, 01:49 PM
#5
2nd Gear Member
Join Date: Jun 2005
Location:
Posts: 433
RE: 70mm vs. 75mm Accufab?
ORIGINAL: Chopper
MM&FF did a test using both sizes and the 75mm won out by a couple of horses.I have a 75mm set-up and it makes me happy.The 70mm is probably adequate with a stock engine but if you plan on upgrading heads,cams,or exhaust later on you might want to go with a bigger set-up.Since there's no penalty to go bigger right now,why not?
MM&FF did a test using both sizes and the 75mm won out by a couple of horses.I have a 75mm set-up and it makes me happy.The 70mm is probably adequate with a stock engine but if you plan on upgrading heads,cams,or exhaust later on you might want to go with a bigger set-up.Since there's no penalty to go bigger right now,why not?
11-23-2005, 02:55 PM
#7
3rd Gear Member
Join Date: Jul 2004
Location:
Posts: 823
RE: 70mm vs. 75mm Accufab?
All I have heard and read previously is if you use an Accufab plenum, you only need to use a 70mm throttle body. If you use another aftermarket plenum such as C&L and a few others out there, it is recommended to go with the 75mm. That seems to be the overall opinion in the Mustang world.
11-24-2005, 02:04 AM
#8
2nd Gear Member
Thread Starter
Join Date: Apr 2005
Location:
Posts: 191
RE: 70mm vs. 75mm Accufab?
Some people have been suggesting I wait with the intake system until later. Would I get more bang from a new intake system or switching the stock H-pipe to a catted X-pipe?
