what is tpi?
08-20-2002, 08:49 PM
#1
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Car: 86 firebird
Engine: v6
Transmission: 7004r
what is tpi?
I am new to the car world and trying to figure out terms. How do i know if my car has TPI? or TBI? and what does it mean. I see what the TPI and TBI stands for but unsure of the defination in plain english.....
Last edited by cfirebird86; 08-20-2002 at 08:53 PM.
08-20-2002, 08:52 PM
#2
If this is a joke or not, here it goes.
TPI = Tune Port Injection
TBI = Throttle Body Injection
HSR = Holley Stealth Ram Intake
MAF = Mas Air Flow Sensor
LT1 = 3 letter designation for an engine/intake (4th Generation & Vettes)
LS1 = 3 letter designation for another engine/intake (4th Generation & Vettes)
MAP = Manifold Absolute Pressure
IAT = Idle Air Control
CAI = Cold Air Induction
T5 = 3rd Generation Manual Transmission
T56 = 4th Generation Manual Transmission
3rd Gen = our cars... 1982-1992
4th Gen =1993-2002
Theres to many to come up with.
TPI = Tune Port Injection
TBI = Throttle Body Injection
HSR = Holley Stealth Ram Intake
MAF = Mas Air Flow Sensor
LT1 = 3 letter designation for an engine/intake (4th Generation & Vettes)
LS1 = 3 letter designation for another engine/intake (4th Generation & Vettes)
MAP = Manifold Absolute Pressure
IAT = Idle Air Control
CAI = Cold Air Induction
T5 = 3rd Generation Manual Transmission
T56 = 4th Generation Manual Transmission
3rd Gen = our cars... 1982-1992
4th Gen =1993-2002
Theres to many to come up with.
Last edited by 86FyrBrd; 08-20-2002 at 08:56 PM.
08-20-2002, 08:53 PM
#4
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Car: 89 Black GTA
Engine: 5.7 TPI
Transmission: 700R4
What???? is this a wierd joke? You are a member with 111 posts and you dont know what tpi is.
Interesting. I dont know if I should actually answer this or not.
Brian
Interesting. I dont know if I should actually answer this or not.
Brian
08-20-2002, 08:56 PM
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tpi stands for tuned port injection and its one fo the first performance fuel injection systems gm made. its really good for low end torque b/c of its long runners but they start ro restict air flow at about 4000 rpm. i think its great and it looks really cool
08-20-2002, 09:01 PM
#6
easy way, Throttle Body injection (TBI) looks like a carb. and has an injector in the throttle body
TPI doesnt looks like a carb, has a big cast plenum then nice tubes (runners) going down into an intake manifold, also has fuel rails and 8 fuel injectors.
TPI doesnt looks like a carb, has a big cast plenum then nice tubes (runners) going down into an intake manifold, also has fuel rails and 8 fuel injectors.
08-20-2002, 09:01 PM
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Car: 86 firebird
Engine: v6
Transmission: 7004r
tpi
I saw what it stands for I just don't understand what tuned port injection is. I know something is inject.
here is what my engine looks like
here is what my engine looks like
Last edited by cfirebird86; 08-20-2002 at 09:18 PM.
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08-20-2002, 09:16 PM
#8
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Car: Death Mobile
Engine: 666 c.i.
Originally posted by cfirebird86
I saw what it stands for I just don't understand what tuned port injection is. I know something is inject.
I saw what it stands for I just don't understand what tuned port injection is. I know something is inject.
j/k
08-20-2002, 10:18 PM
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HSR?
Hehehe. HSR. Oooh I have one of those!
LOL Okay.
OOPS! Read it wrong... I think I would have the HSP....
Holley Stealth Projection.
Oh hell what do I have? Hahahaha....
Ummmm
SIM?
Okay.
LOL Okay.
OOPS! Read it wrong... I think I would have the HSP....
Holley Stealth Projection.
Oh hell what do I have? Hahahaha....
Ummmm
SIM?
Okay.
Last edited by Snowdog 91 Formula; 08-20-2002 at 10:24 PM.
08-21-2002, 08:03 AM
#14
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This is TPI (tuned port injection)
Works similar to any other fuel injection system. In this case:
air goes through the throttle body, into the plenum, down the runners, meets with the fuel and spark. The 8 fuel injectors are in each port. It's better than TBI because TBI only has (usually) two injectors and just dumps air and fuel down the throttbody. It's inefficient.
Works similar to any other fuel injection system. In this case:
air goes through the throttle body, into the plenum, down the runners, meets with the fuel and spark. The 8 fuel injectors are in each port. It's better than TBI because TBI only has (usually) two injectors and just dumps air and fuel down the throttbody. It's inefficient.
08-21-2002, 04:16 PM
#18
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Car: 1991 Trans Am
Engine: 305 TPI
Transmission: 700R4
Also, tuned port injection has superior fuel atomization and more efficient combustion because the fuel is injected into a high speed air flow just a bit upstream from the intake valve. This leaves most of the intake manifold dry and allows for almost perfect cylinder-to-cylinder fuel distribution.
It may not always produce more power than a carb or tbi based engine, but it is always more efficient.
It may not always produce more power than a carb or tbi based engine, but it is always more efficient.
08-21-2002, 04:23 PM
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Originally posted by SHO350
Also, tuned port injection has superior fuel atomization and more efficient combustion because the fuel is injected into a high speed air flow just a bit upstream from the intake valve. This leaves most of the intake manifold dry and allows for almost perfect cylinder-to-cylinder fuel distribution.
It may not always produce more power than a carb or tbi based engine, but it is always more efficient.
Also, tuned port injection has superior fuel atomization and more efficient combustion because the fuel is injected into a high speed air flow just a bit upstream from the intake valve. This leaves most of the intake manifold dry and allows for almost perfect cylinder-to-cylinder fuel distribution.
It may not always produce more power than a carb or tbi based engine, but it is always more efficient.
Hate to say it but ford had the right idea on the A/F distrobution.
08-21-2002, 06:55 PM
#21
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Car: 1987 IROC-Z
Engine: 305 TPI
Transmission: T5
Originally posted by Odyssey
I think "cfirebird86" has a FV6 ! Which I think stands for "Flithy V6" lol
I think "cfirebird86" has a FV6 ! Which I think stands for "Flithy V6" lol
you have a 2.8 liter multi port fuel injected system, A.K.A. MPFI.
MPFI & TPI's concepts are almost the same, the only differences is that one is that TPI is a V8 "duh," TPI is a batch fire system where MPFI shoots cylender at a time, and TPI has tuned runners.
Batch fire means whent he car is running, all of the fuel injectors in the left side shoot at once, then all of the right ones, and the cycle goes on. you could plug the injector plugs on one side completly reverse and the car would run fine because of the batch fire setup.
MPFI on the other hand would wig out lol.
hope I was of some help
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