Throttle Body and MAF

Rosco · 03-20-2002, 10:17 AM

Well, i was wondering, would getting a larger throttle body and MAF be of any use on a stock motor? Also...are the ones on 5.0's 53mm stock?

Mr 5 0 · 03-20-2002, 10:55 AM

Originally posted by Rosco

Well, i was wondering, would getting a larger throttle body and MAF be of any use on a stock motor?

No. Many Mustang magazine dyno tests have shown that a 65mm TB actually can reduce power on a stock 5.0.

Also...are the ones on 5.0's 53mm stock?

No, they're 60mm.

302 LX Eric · 03-20-2002, 01:16 PM

Matching the TB size to any motor is always a good idea. In one dyno test performed by 5.0 Magazine, they had a mildly modified 302 (heads, intake, cam) test mule. I believe the 65 mm was the best. However, it should be noted that in some cases, a larger TB provided higher peak HP, but with loses across the lower to middle power band.

On a near stock motor, stick with the factory TB.

E

drudis · 03-20-2002, 03:57 PM

Ditto.
Except someone even tested a bigger TB on high hp motor, and said that the dyno showed no improvement, and lost drivability.

I'm sticking with my 65mm on the 500hp combo I'm building.

Stang_Crazy · 03-20-2002, 05:21 PM

When I changed my MAF from the stock unit to the C&L 76mm, I noticed a nice improvement. The car seems to pull harder after 3000 rpm and doesn't stop until redline. I still have the stock TB.

03-20-2002, 10:17 AM	#1
Rosco Registered Member Join Date: Mar 2002 Location: Vestal, NY Posts: 307	Throttle Body and MAF Well, i was wondering, would getting a larger throttle body and MAF be of any use on a stock motor? Also...are the ones on 5.0's 53mm stock? __________________ 1989 Mustang 5.0 Conversion, Full Saleen ground effects and spoiler, '94 saleen decal set, '93 Saleen Seats, Black interior from a '93, Steeda quadrant, smog pump delete, a/c delete, Steeda Tri-Ax shifter, '97 rear differential, aluminum driveshaft, 5 lug conversion, '97 rear disc brakes, southside upper and lower control arms, '99 GT Anniversary wheels, flowtech longtubes, flowtech offroad H-pipe, saleen lowering springs, kyb shocks, caster/camber plates

03-20-2002, 10:55 AM	#2
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	Re: Throttle Body and MAF Originally posted by Rosco Well, i was wondering, would getting a larger throttle body and MAF be of any use on a stock motor? No. Many Mustang magazine dyno tests have shown that a 65mm TB actually can reduce power on a stock 5.0. Also...are the ones on 5.0's 53mm stock? No, they're 60mm.

03-20-2002, 01:16 PM	#3
302 LX Eric or '331 LX Eric' Join Date: Jan 1999 Location: Columbus, Ohio Posts: 2,142	Matching the TB size to any motor is always a good idea. In one dyno test performed by 5.0 Magazine, they had a mildly modified 302 (heads, intake, cam) test mule. I believe the 65 mm was the best. However, it should be noted that in some cases, a larger TB provided higher peak HP, but with loses across the lower to middle power band. On a near stock motor, stick with the factory TB. E __________________ 1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60'

03-20-2002, 03:57 PM	#4
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	Ditto. Except someone even tested a bigger TB on high hp motor, and said that the dyno showed no improvement, and lost drivability. I'm sticking with my 65mm on the 500hp combo I'm building. __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

03-20-2002, 05:21 PM	#5
Stang_Crazy It's never clean enough! Join Date: Jan 1999 Location: Shaler, PA Posts: 1,542	MAF When I changed my MAF from the stock unit to the C&L 76mm, I noticed a nice improvement. The car seems to pull harder after 3000 rpm and doesn't stop until redline. I still have the stock TB. __________________ ~Dan 2001 SVT Lightning 89' GT : Taking up garage space and waiting for a buyer... Rice Hater's Club - Member #11