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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424248
12/27/17 02:38 AM
12/27/17 02:38 AM
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Joined: Feb 2003
Posts: 1,942
Metro Detroit
OUTLAWD
top fuel
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top fuel
Joined: Feb 2003
Posts: 1,942
Metro Detroit
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I have the 1200 FITech, but all the throttle bodies only flow ~830cfm, so take that into consideration. The ET was very close to my 950hp Holley, fuel mileage took a lot of work to get to where I was with a 750 vac sec carb. A lot of tuning decel fuel cut, leaning out part throttle cruise, etc
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424270
12/27/17 04:20 AM
12/27/17 04:20 AM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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So the ET is achieveable, but with more tuning and a laptop? would you do it again with the FItech? fuel injection is neat and i like the functions but Im getting decent at tuning my carb...but gasoline all over my intake is not exactly ideal when changing jets Get some quick jet change fuel bowls. They make it much easier.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424402
12/27/17 03:04 PM
12/27/17 03:04 PM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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So the ET is achieveable, but with more tuning and a laptop? would you do it again with the FItech? fuel injection is neat and i like the functions but Im getting decent at tuning my carb...but gasoline all over my intake is not exactly ideal when changing jets Get/make a little catch can or buy a fuel catch from Summit...........here's the deal, once you establish the jets(restrictors) needed for your combo then you MAY only need to make changes if you make major altitude changes otherwise the bleeds help bunches in shaping the curve to your needs............. 
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424528
12/27/17 06:34 PM
12/27/17 06:34 PM
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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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One advantage to EFI: it's closer to what you want in changing the fuel curve to match your torque curve.
An FI manifold can includes shapes and volumes that will not suspend fuel droplets and would cause fuel distribution issues with a carburetor. Example: Ford 5.0, where the air from the TB reverses direction in the plenum. Sometimes this is worth some power, but it depends on the manifold design.
As long as the runner velocity is good, the plenum can be significantly larger without penalty, slowing down air motion, which allows air to better follow the vacuum signal from the cylinder on intake.
Boffin Emeritus
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Re: FI Tech VS Tuned Carb
[Re: Cab_Burge]
#2424708
12/28/17 12:25 AM
12/28/17 12:25 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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When it comes to fuel systems on cars didn't NHRA require Pro Stock to switch to EFI systems several years back with no hood scoop sticking up into the wind  If I'm remembering correctly no one has gone faster with the new EFI systems than they did with carbs. on tunnel rams, correct My message is nothing good comes easily   I have a friend who has built several Chevy Pro Street cars for his customers and he likes the Fi Tech throttle body systems a bunch, so much that he is going to remove the two Carter 600 CFM Competition carbs from his 6.71 blown pro street car and replace them with two Fi Tech throttle bodies and change it over to Fi tech EFI Maybe if it was level playing field EFI might be quicker but no scoop and rpm limits can have a edge 
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Re: FI Tech VS Tuned Carb
[Re: MR_P_BODY]
#2424725
12/28/17 12:57 AM
12/28/17 12:57 AM
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Joined: Aug 2003
Posts: 43,127
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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Didn't NHRA institute the 10,500 RPM rule years ago? As far as the current scoop size and location that should have helped those cars, especially in high gear
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: FI Tech VS Tuned Carb
[Re: Cab_Burge]
#2424804
12/28/17 10:55 AM
12/28/17 10:55 AM
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Joined: Jan 2003
Posts: 8,163
Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,163
Plymouth, MI
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Didn't NHRA institute the 10,500 RPM rule years ago? As far as the current scoop size and location that should have helped those cars, especially in high gear The reduced RPM limit came at the same time as the switch to EFI, along with a mandated wheelie bar height if I remember correctly. The scoop also didn't help as it's picking up warmer air from the track surface vs. the original pro stock scoop location.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424813
12/28/17 12:00 PM
12/28/17 12:00 PM
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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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Wow, anyone else remember "fastest car wins"?
Boffin Emeritus
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2424845
12/28/17 01:10 PM
12/28/17 01:10 PM
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Joined: Mar 2007
Posts: 69
Palm City, FL
Dadodgekid
OP
member
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OP
member
Joined: Mar 2007
Posts: 69
Palm City, FL
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Alrighty, ill stay with my holley. Maybe on the street car ill try the fitech next year.
Last edited by Dadodgekid; 12/28/17 01:11 PM.
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Re: FI Tech VS Tuned Carb
[Re: Dadodgekid]
#2425108
12/28/17 10:53 PM
12/28/17 10:53 PM
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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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Yet another "rinse, repeat" of IROC: everyone has the same car, remember?
Boffin Emeritus
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Re: FI Tech VS Tuned Carb
[Re: Dragula]
#2425190
12/29/17 12:53 AM
12/29/17 12:53 AM
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Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
ccdave
The Ultimate
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The Ultimate
Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
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I did back to back quick fuel vs. FAST TBI self learning years ago...It actually took me a while to get the FAST system to the same ET as the carb. Got to pick the right WOT AFR and get the squirter shot right.
When I was done, they were within .03 of each other. .03 does not seem like a lot when you consider the extra dollars and parts required for EFI.
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