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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Picking the perfect Throttle Body

  • Thread starter Thread starter jopes
  • Start date Start date Apr 28, 2005

jopes

New Member
Apr 28, 2005
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cali
Apr 28, 2005
#1
  • Apr 28, 2005
  • #1
This is not going into a Mustang nor on a 5.0 engine. History time. I have a 78 Bronco with a 400 bored to 408 ci, ~ 375 hp with the current build in it. I am currently getting my intake machined for 5.0 fuel rails. The engine has decent cam, with the rev limiter set to 5400 for now but future upgrades might raise that up higher than it is now.

I will be using a 90-93 Mass air setup from a 5.0 mustang. I just need a little helping hand on a few parts in the mix to ensure my toy a long happy life down the road.

Throttle body size?
Mass Air meter size?
24 lb or 30 lb injectors?

Engine will probably get a over haul in like 3 years and be build with a little more cam, more compression and there is always the idea of spraying the engine with some go juice.
 
S

seijirou

Founding Member
Aug 15, 2002
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48
DFW
Apr 28, 2005
#2
  • Apr 28, 2005
  • #2
75mm TB, bigger than that MAF, 30 pounders.
 

Ranchero5.0

The Voice of Reason
Jan 1, 1999
5,306
0
76
Hagerstown MD
Apr 28, 2005
#3
  • Apr 28, 2005
  • #3
Ditto the above, what about the distributor? Never played with a 400 except to junk out. With a 351w dist fit? That's the only other hang up I can see for you.

Jamie
 

jopes

New Member
Apr 28, 2005
5
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cali
Apr 28, 2005
#4
  • Apr 28, 2005
  • #4
so 75mm Throttle body with a 80mm Mass air. What happens if I do not like the 75mm Throttle body and want to drop to a 70mm. Will I have to decrease the Mass air meter size or will it be ok?
 

jopes

New Member
Apr 28, 2005
5
0
0
cali
Apr 28, 2005
#5
  • Apr 28, 2005
  • #5
Ranchero5.0 said:
Ditto the above, what about the distributor? Never played with a 400 except to junk out. With a 351w dist fit? That's the only other hang up I can see for you.

Jamie
Click to expand...


poohy, I missed that one. 460 dizzy with the TFI on it.
 
S

seijirou

Founding Member
Aug 15, 2002
2,417
4
48
DFW
Apr 28, 2005
#6
  • Apr 28, 2005
  • #6
No just slap the 70 in it and roll.
 

Ranchero5.0

The Voice of Reason
Jan 1, 1999
5,306
0
76
Hagerstown MD
Apr 28, 2005
#7
  • Apr 28, 2005
  • #7
Cool on the dist, dang funky motors... The 75 should feel fine with 408 cubes to feed. Feel like a 750 vs a 650 carb.

Jamie
 

jopes

New Member
Apr 28, 2005
5
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0
cali
Apr 28, 2005
#8
  • Apr 28, 2005
  • #8
My next engine might be poked and stroked to 440 ci. Would the same setup still support the few extra cubes or would I have to make a set up in Mass air and Throttle body?
 
S

seijirou

Founding Member
Aug 15, 2002
2,417
4
48
DFW
Apr 28, 2005
#9
  • Apr 28, 2005
  • #9
the 85maf would still be fine. I think the 75tb would be fine too, but you might consider an 80. The 30 pounders would probably be fine if you're N/A
 

jopes

New Member
Apr 28, 2005
5
0
0
cali
Apr 28, 2005
#10
  • Apr 28, 2005
  • #10
so your recommending I run a 85mm MAF and 75mm TB then if I need to step to the 80mm TB after the next rebuild.


If so where are some good links for the bigger MAF stuff.
 
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