Upper Plenum showdown....

91LX2Bfast · 03-05-2004, 02:30 PM

Keep your eye on this one. It'll probably answer a lot of questions you guys have about the performance #'s with the bigger upper/TB combo:
Introducing the Contestants!!!!!!!!

91LX2Bfast · 03-17-2004, 02:12 PM

The results: Showdown Part II

xxxBlakexxx · 03-17-2004, 09:37 PM

Those results are really dissapointing if you ask me. Lots of $ for a few horses. Am I missing something here? Can anyone make me feel good about my investment? Do those horses really translate into better times?

JBeryleC · 03-18-2004, 01:38 AM

Anyone know what numbers we'd get with the accufab plenum and STOCK throttle body???

I saw in one of the other posts that the stock throttle body is 80mm... and that dyno sheet says the accufab tb is only 75mm
Why use a smaller than stock tb? Whats up with that?

It would make sence that if we use the accufab plenum with the stock tb we'll get more airflow, and with that... higher numbers that the 272hp & 310tq

opinions everyone???

And will the stock tb fit the accufab plenum?

xxxBlakexxx · 03-18-2004, 07:36 AM

The stock TB on my 2000 is 63 mm, I think. I don't know for your year, but it is probably the same.

surfbeast · 03-18-2004, 08:17 AM

Stock T/B's are 65mm for all 94-04 GT's. The problem that I have with the data is that everyone is geting excited about the Accufab unit because it gives an extra 1 Hp gain. It costs 100 bucks more! It is real nice looking but for a hundred bucks I'll pass. I got the Dragon plenum and 70mm T/B for under a hundred bucks off e-bay. Polished them both and they look and work great. If I had a newer model I would get the 75mm T/B and the cheaper of the bunch of upper plenums. Port the upper a bit and be within 1-3 Hp max of the overpriced Accufab unit. 1-5 HP is not going to win or loose a race, or improve your track time.

jaxter1 · 03-18-2004, 09:59 AM

Remember, that's REAR WHEEL HP....on a dyno....so, it's not too bad considering it's just an intake flow improvement.......anything that nets a half-dozen HP reliably sure helps even stock. When combined w/exhaust, timing, etc it's a no-brainer, you'd need it anyway. I'd like to see that same test w/a stock exhaust, prob would make even less gain.....it's old news but most mod's wind up improving other mod's....where to stop is the trick....

blue00gt · 03-18-2004, 08:45 PM

They tested the Accufab with the stock TB in round one and it made more power and torque (by 1 or 2) than with the 75mm in the more recent test.

explicitone · 03-19-2004, 02:26 AM

but lost as much as 15 hp at 3000-4500

JBeryleC · 03-19-2004, 02:39 AM

Well my question was based on the fact that someone said it has a 80mm tb stock... which now I know is not true! It is 65mm stock...

so it makes sense that a 70 or 75mm tb will yeild better numbers.

Any word on a 80mm tb coming out??

and.. BIG question.. when is Ford Racing gonna start making stuff for our new stangs???

their website and catalog is still aimed primarily at the 5.0's!!

explicitone · 03-19-2004, 02:44 AM

Quote:

Originally posted by JBeryleC
Well my question was based on the fact that someone said it has a 80mm tb stock... which now I know is not true! It is 65mm stock...

so it makes sense that a 70 or 75mm tb will yeild better numbers.

Any word on a 80mm tb coming out??

and.. BIG question.. when is Ford Racing gonna start making stuff for our new stangs???

their website and catalog is still aimed primarily at the 5.0's!!

like the my last post t/b without changing the plenum some a 1-2 hp increase at peak but lose up to 15hp from 3000-4500
so in turn a t/b will slow you down

and there is no need for a 80mm t/b unless you have a built stroked motor running a blower or turbo pushing 20+ lbs of boost

JBeryleC · 03-19-2004, 02:58 AM

I want to see a Ford Racing 75mm tb and plenum released!!!!

Thats what I'd go with. I am partial to sticking to Ford parts, I guess its the heritage in my blood or something. haha

explicitone · 03-19-2004, 03:05 AM

Quote:

Originally posted by JBeryleC
I want to see a Ford Racing 75mm tb and plenum released!!!!

Thats what I'd go with. I am partial to sticking to Ford parts, I guess its the heritage in my blood or something. haha

what ever you dont get the ford racing 70mm t/b it sucks all it is ,is a 65mm t/b bored out to 70 with a new butterfly
and it is not 70mm all the way it starts at 70 and gets smaller

JBeryleC · 03-19-2004, 03:09 AM

ok, good to know

thanks!

chiaronate · 09-20-2004, 04:45 PM

Quote:

Originally posted by explicitone
like the my last post t/b without changing the plenum some a 1-2 hp increase at peak but lose up to 15hp from 3000-4500
so in turn a t/b will slow you down

and there is no need for a 80mm t/b unless you have a built stroked motor running a blower or turbo pushing 20+ lbs of boost

ok, but what about changing to a c&l plenum and 75mm throttle body together. would there still be a horsepower loss from 3000-4500 rpm? or a gain throughout the entire rpm band?

chiaronate · 09-20-2004, 04:57 PM

i've just looked at your post again, and saw that you said the 75mm throttle body made more power between 3000-4500 rpm. my bad. average power across the entire powerband is what really counts anyhow.

xxxBlakexxx · 09-20-2004, 04:57 PM

Talk about reviving a dead post...............

As long as you go with a plenum AND TB, you will be in good shape.

xxxBlakexxx · 09-20-2004, 05:00 PM

Always keep in mind your goals when modding the car. Some mods are better at higher rpms than others. Take for example an X Pipe vs an H Pipe. H Pipes are generally better for adding hp and trq down low, while X pipes can actually cause you to loose both down low but add it up top.

If you drag race, an X-pipe is a better selection than an H Pipe for example. There is ALWAYS a trade-off with any mod even if it is nothing more than cost.

explicitone · 09-24-2004, 10:41 PM

Quote:

Originally posted by xxxBlakexxx
Always keep in mind your goals when modding the car. Some mods are better at higher rpms than others. Take for example an X Pipe vs an H Pipe. H Pipes are generally better for adding hp and trq down low, while X pipes can actually cause you to loose both down low but add it up top.

If you drag race, an X-pipe is a better selection than an H Pipe for example. There is ALWAYS a trade-off with any mod even if it is nothing more than cost.

well said

its all on what the use of the car will be for

like mine I only drive it maybe 200 miles a month now the rest it spends its time at the drag strip

03-05-2004, 02:30 PM	#1
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	Upper Plenum showdown.... Keep your eye on this one. It'll probably answer a lot of questions you guys have about the performance #'s with the bigger upper/TB combo: Introducing the Contestants!!!!!!!! __________________ '97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet

03-17-2004, 09:37 PM	#3
xxxBlakexxx Registered Member Join Date: Sep 2003 Location: Mountaintop, PA Posts: 634	Those results are really dissapointing if you ask me. Lots of $ for a few horses. Am I missing something here? Can anyone make me feel good about my investment? Do those horses really translate into better times? __________________ "Children should not get cancer, but they do!" Help a child with cancer at www.homeoftheirown.org My Stang: 2000 Mustang GT Vert - Steeda Tri-Ax Shifter; C&L Plenum; BBK 75 mm TB; Steeda Strut Tower Supports; Black "Deep Dish" Bullet Wheels; FRPP 4.10's; Steeda Subframes; SLP Catback & SLP Catted X-Pipe; SCT 4 Position Chip with 3 custom tunes; Steeda CAI; Venom-1000 Nitrous; Roush Stage 3 Body Kit; Bullet Suspension Package (on the way)

03-18-2004, 01:38 AM	#4
JBeryleC Registered Member Join Date: Jul 2003 Location: Sebastopol CA Posts: 169	Anyone know what numbers we'd get with the accufab plenum and STOCK throttle body??? I saw in one of the other posts that the stock throttle body is 80mm... and that dyno sheet says the accufab tb is only 75mm Why use a smaller than stock tb? Whats up with that? It would make sence that if we use the accufab plenum with the stock tb we'll get more airflow, and with that... higher numbers that the 272hp & 310tq opinions everyone??? And will the stock tb fit the accufab plenum? __________________ Torch Red '02 GT Convertible 5 spd BBK long tubes, BBK h-pipe, MAC mufflers, K&N w/ silencer trimmed, FRPP 70mm throttle body, C&L plenum, Mobil1 synthetic fluids, FRPP aluminum drive shaft, Steeda Tri-Ax shifter, FRPP 4.10's, 18x9 & 18x10 Saleens with Dunlop SP Super Sport Race rubber, Mach1 grill (GT delete), & Mach1 bumper chin! Click here for pictures & more info! If you are in Northern California, check out North Bay Mustang Club for local meets and cruises!

03-18-2004, 07:36 AM	#5
xxxBlakexxx Registered Member Join Date: Sep 2003 Location: Mountaintop, PA Posts: 634	The stock TB on my 2000 is 63 mm, I think. I don't know for your year, but it is probably the same. __________________ "Children should not get cancer, but they do!" Help a child with cancer at www.homeoftheirown.org My Stang: 2000 Mustang GT Vert - Steeda Tri-Ax Shifter; C&L Plenum; BBK 75 mm TB; Steeda Strut Tower Supports; Black "Deep Dish" Bullet Wheels; FRPP 4.10's; Steeda Subframes; SLP Catback & SLP Catted X-Pipe; SCT 4 Position Chip with 3 custom tunes; Steeda CAI; Venom-1000 Nitrous; Roush Stage 3 Body Kit; Bullet Suspension Package (on the way)

03-18-2004, 08:17 AM	#6
surfbeast Registered Member Join Date: Feb 2002 Location: Maryville,TN Posts: 415	Stock T/B's are 65mm for all 94-04 GT's. The problem that I have with the data is that everyone is geting excited about the Accufab unit because it gives an extra 1 Hp gain. It costs 100 bucks more! It is real nice looking but for a hundred bucks I'll pass. I got the Dragon plenum and 70mm T/B for under a hundred bucks off e-bay. Polished them both and they look and work great. If I had a newer model I would get the 75mm T/B and the cheaper of the bunch of upper plenums. Port the upper a bit and be within 1-3 Hp max of the overpriced Accufab unit. 1-5 HP is not going to win or loose a race, or improve your track time. __________________ 98 GT / convertable -98 Saleen engine, Saleen appearance pkg. SHM cams,P&P NPI heads, and so much more!

03-17-2004, 02:12 PM	#2
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	The results: Showdown Part II

03-18-2004, 09:59 AM	#7
jaxter1 Registered Member Join Date: Sep 2000 Location: il Posts: 10	Remember, that's REAR WHEEL HP....on a dyno....so, it's not too bad considering it's just an intake flow improvement.......anything that nets a half-dozen HP reliably sure helps even stock. When combined w/exhaust, timing, etc it's a no-brainer, you'd need it anyway. I'd like to see that same test w/a stock exhaust, prob would make even less gain.....it's old news but most mod's wind up improving other mod's....where to stop is the trick....

03-18-2004, 08:45 PM	#8
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	They tested the Accufab with the stock TB in round one and it made more power and torque (by 1 or 2) than with the 75mm in the more recent test. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

03-19-2004, 02:26 AM	#9
explicitone Registered Member Join Date: Apr 2002 Location: racine ,wi Posts: 691	but lost as much as 15 hp at 3000-4500 __________________ RUN IT STAIGHT AND RUN IT HARD ________ Novi 2000 60' 1.46 1/4 10.67 mph 126.5 _________

03-19-2004, 02:39 AM	#10
JBeryleC Registered Member Join Date: Jul 2003 Location: Sebastopol CA Posts: 169	Well my question was based on the fact that someone said it has a 80mm tb stock... which now I know is not true! It is 65mm stock... so it makes sense that a 70 or 75mm tb will yeild better numbers. Any word on a 80mm tb coming out?? and.. BIG question.. when is Ford Racing gonna start making stuff for our new stangs??? their website and catalog is still aimed primarily at the 5.0's!! __________________ Torch Red '02 GT Convertible 5 spd BBK long tubes, BBK h-pipe, MAC mufflers, K&N w/ silencer trimmed, FRPP 70mm throttle body, C&L plenum, Mobil1 synthetic fluids, FRPP aluminum drive shaft, Steeda Tri-Ax shifter, FRPP 4.10's, 18x9 & 18x10 Saleens with Dunlop SP Super Sport Race rubber, Mach1 grill (GT delete), & Mach1 bumper chin! Click here for pictures & more info! If you are in Northern California, check out North Bay Mustang Club for local meets and cruises!

03-19-2004, 02:58 AM	#12
JBeryleC Registered Member Join Date: Jul 2003 Location: Sebastopol CA Posts: 169	I want to see a Ford Racing 75mm tb and plenum released!!!! Thats what I'd go with. I am partial to sticking to Ford parts, I guess its the heritage in my blood or something. haha __________________ Torch Red '02 GT Convertible 5 spd BBK long tubes, BBK h-pipe, MAC mufflers, K&N w/ silencer trimmed, FRPP 70mm throttle body, C&L plenum, Mobil1 synthetic fluids, FRPP aluminum drive shaft, Steeda Tri-Ax shifter, FRPP 4.10's, 18x9 & 18x10 Saleens with Dunlop SP Super Sport Race rubber, Mach1 grill (GT delete), & Mach1 bumper chin! Click here for pictures & more info! If you are in Northern California, check out North Bay Mustang Club for local meets and cruises!

03-19-2004, 03:09 AM	#14
JBeryleC Registered Member Join Date: Jul 2003 Location: Sebastopol CA Posts: 169	ok, good to know thanks! __________________ Torch Red '02 GT Convertible 5 spd BBK long tubes, BBK h-pipe, MAC mufflers, K&N w/ silencer trimmed, FRPP 70mm throttle body, C&L plenum, Mobil1 synthetic fluids, FRPP aluminum drive shaft, Steeda Tri-Ax shifter, FRPP 4.10's, 18x9 & 18x10 Saleens with Dunlop SP Super Sport Race rubber, Mach1 grill (GT delete), & Mach1 bumper chin! Click here for pictures & more info! If you are in Northern California, check out North Bay Mustang Club for local meets and cruises!

09-20-2004, 04:57 PM	#16
chiaronate Registered Member Join Date: Jul 2002 Location: watervliet, ny Posts: 105	i've just looked at your post again, and saw that you said the 75mm throttle body made more power between 3000-4500 rpm. my bad. average power across the entire powerband is what really counts anyhow. __________________ 2000 mustang gt, silver with black interior and manual transmission current performance mods: 80mm pro-m with filter c&l plenum mac 70mm throttle body mac underdrive pulleys pro 5.0 shifter 3.90 gears dynomax super turbo mufflers diablosport predator programmer future performance mods: x-pipe with converters

09-20-2004, 05:00 PM	#18
xxxBlakexxx Registered Member Join Date: Sep 2003 Location: Mountaintop, PA Posts: 634	Always keep in mind your goals when modding the car. Some mods are better at higher rpms than others. Take for example an X Pipe vs an H Pipe. H Pipes are generally better for adding hp and trq down low, while X pipes can actually cause you to loose both down low but add it up top. If you drag race, an X-pipe is a better selection than an H Pipe for example. There is ALWAYS a trade-off with any mod even if it is nothing more than cost. __________________ "Children should not get cancer, but they do!" Help a child with cancer at www.homeoftheirown.org My Stang: 2000 Mustang GT Vert - Steeda Tri-Ax Shifter; C&L Plenum; BBK 75 mm TB; Steeda Strut Tower Supports; Black "Deep Dish" Bullet Wheels; FRPP 4.10's; Steeda Subframes; SLP Catback & SLP Catted X-Pipe; SCT 4 Position Chip with 3 custom tunes; Steeda CAI; Venom-1000 Nitrous; Roush Stage 3 Body Kit; Bullet Suspension Package (on the way)

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