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TPI vs. Carb

Old Jul 23, 2002 | 12:10 PM
  #1  
pauldaniel26's Avatar
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From: Allentown, PA
Car: 1986 IROC-Z28
Engine: 355 in the works...
Transmission: T5
TPI vs. Carb

Now if someone were to build up a 305, what would be a better choice? And please don't start this go 350 stuff. I just want to get an idea of what will be a better start for building up. It seems the TPI's have alot of low end grunt but can't breath up high? Thanks for all your help.
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Old Jul 23, 2002 | 01:53 PM
  #2  
Odyssey's Avatar
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From: under the hood
I'd stick with the TPI. The little 305 can use ALL the torque it can make. The carb will make you lose a lot of torque and sometimes driveability which is very important on a daily driven car. I would know....
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Old Jul 23, 2002 | 02:40 PM
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From: Indianapolis IN
The aftermarket poweradder support for TPI is much higher than for carbed applications. TPI also allows you to keep the stock hood when you start making good power. Plus the part throttle response is much better on TPI. Carbs only like to run well in two places, idle and WOT.
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Old Jul 23, 2002 | 03:08 PM
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Odyssey's Avatar
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From: under the hood
"The aftermarket poweradder support for TPI is much higher than for carbed applications" Do you realize what you just said ??? LMAO

Lets see... NOS makes how many types and models of kits for carbed applications ? Several. How many for TPI ? One! Not to count the dozens of carburator supercharger applications.

"Carbs only like to run well in two places, idle and WOT" This is very true !
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Old Jul 23, 2002 | 03:21 PM
  #5  
MikeZ28's Avatar
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From: Charlotte NC
Car: 92 Z28 Z03
Engine: 350
Transmission: 700-R4
Axle/Gears: 2.73 G80
I can see where this is going.:D
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Old Jul 24, 2002 | 12:56 AM
  #6  
Jer82Z28's Avatar
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From: Alberta, Canada
Car: 1987 IROC
Engine: Vortec 350 TPI
Transmission: 7004r
Do you realize what you've done!?

*throws some popcorn in the microwave*


My opinion.. if your on a budget, go carb.
If you have a carb right now, keep it.
If you have TPI right now, keep it unless money will be an issue.
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Old Jul 24, 2002 | 01:05 AM
  #7  
evil t/a's Avatar
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From: mission hills ,ca
Originally posted by ATOMonkey
. Carbs only like to run well in two places, idle and WOT.
Mine runs perfectly all the time , part throttle is great.
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Old Jul 24, 2002 | 09:28 AM
  #8  
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From: Indianapolis IN
NOS plate systems are plentiful. True

You can find lots of roots blowers for carbs. True

You can fit either of those under a stock hood with any kind of decent intake manifold. False

You can buy a Centrifugal blower for a carb cheaper than TPI if you can even find one. False

Trust me on this. I'll give you the fact that the initial investment on a carb is cheaper. It's easier to install if wires scare the $hit out of you. After you buy a jet kit, accelerator pumps, diaphragms, spacers, fuel logs, hoses, pumps, regulators, etc. It starts to get a little pricey. You'd better have a good idea on how to tune a carb as well. The advantage of Fuel injection is out of the box performance, drivability in cold weather, driveability in hot weather, power adder adaptability. Ever try to set up a carb for blow through, or even draw through? That starts getting expensive too. Not to mention having to rejet the carb to every different driving condition if you want it to run the same way. After having the chance to tune the two different systems, give me late model fuel injection any day.
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Old Jul 24, 2002 | 12:02 PM
  #9  
LottaBallsCamaro's Avatar
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From: Hampton Roads. VA
<------puts on flame retardent suit and yells Carbs suck!!!
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Old Jul 24, 2002 | 01:17 PM
  #10  
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From: CC, TX
Car: 1999 Yamaha Banshee
Engine: 379cc twin cyl 2-stroke stroker
Transmission: 6 spd manual
Axle/Gears: 14/41 tooth
statements like that show ignorance. they both have their places, i like mine a whole lot! im out of this thread
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Old Jul 24, 2002 | 02:15 PM
  #11  
RB83L69's Avatar
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Depends on the ground rules...

What's already in the car? Cost? Emissions? Goals in ET or HP?

Are we trying to simply go as fast as possible, or what? Are we comfortable with the tuning for each?

There's no one right answer. There's certainly more potential in the carb setup for pure power output, but that doesn't mean it's better in all cases; it certainly wouldn't make sense for most people who have a TPI car to yank it and stick a carb on their motor. If you already have TPI and your goals are within its range, then it makes more sense. But I would certainly not take a perfectly good carb car and put TPI in it either.

If you want EFI and not limit yourself to TPI specifically, then the playing field gets alot more even. There are a whole lot of better ways to make EFI power than TPI. But cost becomes an issue.

etc....
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Old Jul 24, 2002 | 05:28 PM
  #12  
spartyon's Avatar
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From: winthrop harbor, il & plymouth, il
Car: 1986 camaro
Engine: 383 sbc
Transmission: th-400
Axle/Gears: 4th Gen 10 bolt/Detroit TrueTrac 4.
if u dont mind tuning to high hell a carb will produce more power if tuned properly. although the fuel injection crap on todays cars have a quicker pickup but loose it at wot where as with the cars i have delt with the carb maintains more power at wot. plus its cheaper
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