MustangWorks.com : Ford Forums - View Single Post - MAC 70 mm- Does it really hurt torque?

Chevyguy · 02-13-2002, 11:23 AM

I had posted a similar question a while back and EVERYONE said go for a 65 mm. Sounds like he still has a stock TB and is wondering if he should get a 65 or 70MM unit.

Mac only sells a 70mm unit, they claim it makes somewhat more power than a 65 mm with no real torque loss therefore they felt the 65 mm was not necessary. Of course that is their opinion, many other mfr's make 65 mm units.

I was pretty sold on a 65 for my car till now, this is interesting.

I have a set of cobra 24# injectors, and need new headers and h pipe. Still have original fuel pump, TB, MAF etc So..

I was figuring on going long tube 1 5/8 headers with cat H pipe, 155 LPH pump Adjustable FPR, the 24# injectors, a 76 MM C&L MAF calib for 24# with the alum connector pipe, and a new TB. Now I am thinking a 70MM unit again ARRGH

Also have a pulley set and a 130 amp alt to install too, too dam cold for now!

02-13-2002, 11:23 AM	#9
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	I had posted a similar question a while back and EVERYONE said go for a 65 mm. Sounds like he still has a stock TB and is wondering if he should get a 65 or 70MM unit. Mac only sells a 70mm unit, they claim it makes somewhat more power than a 65 mm with no real torque loss therefore they felt the 65 mm was not necessary. Of course that is their opinion, many other mfr's make 65 mm units. I was pretty sold on a 65 for my car till now, this is interesting. I have a set of cobra 24# injectors, and need new headers and h pipe. Still have original fuel pump, TB, MAF etc So.. I was figuring on going long tube 1 5/8 headers with cat H pipe, 155 LPH pump Adjustable FPR, the 24# injectors, a 76 MM C&L MAF calib for 24# with the alum connector pipe, and a new TB. Now I am thinking a 70MM unit again ARRGH Also have a pulley set and a 130 amp alt to install too, too dam cold for now! __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.