Throttle body size on a 351

blk88lx · 01-13-2003, 12:37 PM

I have a 351W going into a 93 GT. It has a cobra upper and lower, but other than that, it's mostly stock. I have 24 pnd injectors and I was planning on a 70 MM Mass air Meter and a bigger fuel pump. Do I need a regulator and would a 65MM Throttle Body be enough?

WADS56 · 01-13-2003, 01:53 PM

If you are using a stock cobra intake a 65 will be fine. A 70 will be ok to, but if you allready have a 65 why waste money. I would get a adj regulater because you may need to do some fine tuning. And yes a new pump would be a good idea to supply the new 351.

Wade

blk88lx · 01-13-2003, 02:25 PM

I don't have a 65 yet, all I have is the stock unit on the 93. I just don't want to go 2 big. I'm a carb guy, haven't messed with an EFI swap. I know using a carb that is to big for a motor is bad, wasn't sure about a T/B. Guess I'll look for a 65. I assume the stock T/B is smaller, right?

WADS56 · 01-13-2003, 02:36 PM

If you have not bought one yet get the 70mm, it will not harm your performance on a 351. It will give you some to grow if you do some mods like a head and intake swap. I THINK that stock is 60mm.

01-13-2003, 12:37 PM	#1
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	Throttle body size on a 351 I have a 351W going into a 93 GT. It has a cobra upper and lower, but other than that, it's mostly stock. I have 24 pnd injectors and I was planning on a 70 MM Mass air Meter and a bigger fuel pump. Do I need a regulator and would a 65MM Throttle Body be enough? __________________ 93 GT, 5.8 EFI usual bolt ons, 3.55's, subs, hurst, K+N 78 F100 Short bed, 5.8, dual pipes 4 bbl 03 Sable

01-13-2003, 01:53 PM	#2
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	If you are using a stock cobra intake a 65 will be fine. A 70 will be ok to, but if you allready have a 65 why waste money. I would get a adj regulater because you may need to do some fine tuning. And yes a new pump would be a good idea to supply the new 351. Wade __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

01-13-2003, 02:25 PM	#3
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	I don't have a 65 yet, all I have is the stock unit on the 93. I just don't want to go 2 big. I'm a carb guy, haven't messed with an EFI swap. I know using a carb that is to big for a motor is bad, wasn't sure about a T/B. Guess I'll look for a 65. I assume the stock T/B is smaller, right? __________________ 93 GT, 5.8 EFI usual bolt ons, 3.55's, subs, hurst, K+N 78 F100 Short bed, 5.8, dual pipes 4 bbl 03 Sable

01-13-2003, 02:36 PM	#4
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	If you have not bought one yet get the 70mm, it will not harm your performance on a 351. It will give you some to grow if you do some mods like a head and intake swap. I THINK that stock is 60mm. __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

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