1999 454 carb swap. best street carb, 600? 650? 750? CFM

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

1lejohn

Full Access Member
Joined
May 14, 2012
Posts
325
Reaction score
750
Location
texas
First Name
john
Truck Year
1985 , 2004
Truck Model
k-1500, 2500 HD
Engine Size
350, 6.7
On some newer engines they have gone one step further and used Gasoline Direct Injection (GDI) to inject the gas directly into the cylinder - which means only the air stream is moving past the valves.

However, one downside of GDI is that the gas/air mixture is no longer passing around/through the valves, so you don't get any natural cleansing action from the gasoline and its additives.
Ford had to add port injectors to its Eco boost DI engines. Why? Carbon builds up. Most of the race shops are adding a second fuel system and port injectors on the newer DI engines like the LT's. It much simpler than trying to get more fuel out of the engine driven pumps. I think we have reached the point of diminishing returns for the cost and complexity of the new engines in the terms of horsepower and mileage. They are awesome but at quite a cost.
 

Vbb199

B-rate Hillbilly Customs
Joined
Jan 12, 2018
Posts
9,108
Reaction score
15,456
Location
Salisbury NC
First Name
Vince
Truck Year
89, 79
Truck Model
89 Suburban R1500, 79 C10
Engine Size
350, 502
I forgot how hilarious the bantering gets on this forum every time someone asks for carb reccomendations for their motor

Theres always one guy running some dinky **** choking his motor down, then the other guy running a carb thats suited for 2x the HP his head swapped motor makes, then theres just the classic guys who swear by this or that because its all they know

Dont even get me started on the fuel injection arguements :happy175:
 

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
5,596
Reaction score
9,112
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
Dont even get me started on the fuel injection arguements :happy175:
Or what happens when you tie butter toast to a cats back.
 
Last edited:

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,618
Reaction score
28,861
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Lol, induction choice discussions can be as bad as politics.
 

59840Surfer

Full Access Member
Joined
Oct 8, 2020
Posts
212
Reaction score
336
Location
Montana
First Name
Joe
Truck Year
1986
Truck Model
K5
Engine Size
350 Stroker to 383 with a 400 crank, Crane Cam, Q-Jet, single 3.5" exhaust..
Lol, induction choice discussions can be as bad as politics.
I have to add that to my list.

1. Never tell a guy he can't stack firewood correctly.
2. Never insult a guy's wife, no matter how fat or ugly she is.
3. Never discuss politics or religion
4. Never discuss fuel and air induction or injection.
 

Forum statistics

Threads
44,414
Posts
957,058
Members
36,748
Latest member
mrevil
Top