TSP ported TB
All 3 mods will help your 1/4 mile times. Some wont show as much on the dyno as they will on the track . There must be a reason all the high hp cars have these done. I have personally gained over a tenth from the crank pulley at the track. I got it 2 years ago and never had any problems. I just ported my own tb but not sure what I gained since I havent been to the track since or been on the dyno.
TECH Enthusiast
Joined: Apr 2004
Posts: 749
Likes: 0
From: Chandler, Arizona
I would think the TB would lean you out some. Remember, at WOT the car is in OPEN LOOP. It uses the PE tables to set the fuel, not the O2 sensors. So if you flow more air, it would make sense that you would lean out the car at WOT. That's why you need to compare a before and after with a tune after installing the ported TB.
If one of our sponsors will send me a Ported TB I will get a before and after Dyno run. All they need to pay for is the dyno pull and tune ($150) and then if it makes more than 5 hp I'll pay for the Ported TB, if not, then I'll send back the Ported TB. ANY TAKERS???? I'll also post all the numbers on the board if it makes good power, otherwise, I'll keep it quiet. ;-)
If one of our sponsors will send me a Ported TB I will get a before and after Dyno run. All they need to pay for is the dyno pull and tune ($150) and then if it makes more than 5 hp I'll pay for the Ported TB, if not, then I'll send back the Ported TB. ANY TAKERS???? I'll also post all the numbers on the board if it makes good power, otherwise, I'll keep it quiet. ;-)
Originally Posted by glennhl
I would think the TB would lean you out some. Remember, at WOT the car is in OPEN LOOP. It uses the PE tables to set the fuel, not the O2 sensors. So if you flow more air, it would make sense that you would lean out the car at WOT. That's why you need to compare a before and after with a tune after installing the ported TB.
FRA gains can't be seen on the dyno. You need the airflow from moving that fast to see it. That is why you only can see the gains at the track. Put a dyno in a wind tunnel and make the are speed the same as the wheel speed. There would be your gain.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
Originally Posted by glennhl
Bads,
I'm a PROFESSIONALLY REGISTERED Engineer. I'm good with numbers AND letters.
Have a nice day!
I'm a PROFESSIONALLY REGISTERED Engineer. I'm good with numbers AND letters.
Have a nice day!
Drew when your a/f changed, what was different about the dyno pulls? Different dyno?, etc.
Drew, How much time between pulls? Were they back to back or did you dyno, drive for a few weeks, then dyno again? If they were back to back, the computer did not have time to adjust to the increase in air. In this case, the car would run lean.
Launching!
Joined: Nov 2002
Posts: 257
Likes: 0
From: Fort Carson, CO
Originally Posted by Bads02Z28
Drew, How much time between pulls? Were they back to back or did you dyno, drive for a few weeks, then dyno again? If they were back to back, the computer did not have time to adjust to the increase in air. In this case, the car would run lean.
2/20/04 dyno - 344.3rwhp 353.6rwtq (pre TB) 12.6-12.8 a/f
(tb installed somewhere in this space of time)
5/5/04 dyno - 1st pull - 347.4rwhp 362.5 rwtq a/f 13.4 (pinging out at 5400rpm instantly dropping 20rwhp to 6k)
We messed with the fuel in ls1edit... adding in some places and yada yada and finally found something that worked perfectly.
6th pull- 349.3rwhp 362.8rwtq a/f 12.8.
All Dyno pulls done on the same dyno (Dynotex, San Antonio Texas)
Well sometimes you reach a point in modifying a car that the factory tune is not enough. Looks like your TB gave you some power and torque though. However, that difference could be noticed from one day to the next without any mods. Anyhow, if you plan on going H/C one day, you will be ready in the TB department.
Staging Lane
Joined: Feb 2004
Posts: 85
Likes: 0
From: San Antonio, TX
Originally Posted by SidewayzOZ
How can it flow more air if you arent changing what is taken in? All you are changing is how much more air gets from the MAF to the intake. This cant be read at all by the pcm, so fuel trims wont be changed (which affect open loop). Im not seeing the logic behind your thinking. It makes no sense for a tbody to lean out the car.
You said it yourself, fuel trims wont be changed, but you will be getting more air in the motor (if you didn't the TB wouldn't be worth power). So it makes logical sense that a better flowing TB will lean out the car some.
On The Tree
Joined: Feb 2004
Posts: 152
Likes: 0
From: San Rafael, CA
Originally Posted by JustAnotherSS
your pcm is giving the motor the same amount of fuel at WOT; so if you add a TB which allows more air to reach the motor (in theory) the will be more air to the same amount of fuel, effectively making the car run more lean.
You said it yourself, fuel trims wont be changed, but you will be getting more air in the motor (if you didn't the TB wouldn't be worth power). So it makes logical sense that a better flowing TB will lean out the car some.
You said it yourself, fuel trims wont be changed, but you will be getting more air in the motor (if you didn't the TB wouldn't be worth power). So it makes logical sense that a better flowing TB will lean out the car some.
Staging Lane
Joined: Feb 2004
Posts: 85
Likes: 0
From: San Antonio, TX
Originally Posted by ricekillman
This doesn't make sense, then everyone who switches from an ls1 intake to an ls6 would run very lean and everyone who ports their stock heads would run real lean, anyone with even the smallest of cams over stock would run lean.
thats why you tune...