SStrokerAce

iTrader: (2)

O.k. I'm not one to boast about anything. In fact I almost never mention numbers with the TB's other than the cfm increase. Which is about 200cfm.

Tonight, went to the track and took a TB with me. A guy in a 2002 SS with a lid, bellows and a cutout droped it on his car. Previous best was a 12.87 @ 110, tonight he ran 2 12.45's @ 112. I was pretty shocked by that because the traction seemed to go down as the night went on.

One more little story. I had a customer in CA, who is also a sponsor, drop a TB on. On his G-Tech (which I know is not the most accurate thing) droped .5 and gained 5mph. That's REALLY high in my eyes, so I'm not sure that's going to happen on the strip, but it's good to hear.

These are just some results that I have gotten lately. Sometimes the car doesn't like the TB and there is little gain, some times it seems to help a ton.

Anways just wanted to share what a saw today.

Bret

redz_02

iTrader: (4)

hehe, thats why i sent mine to you.

Ragtop 99

iTrader: (7)

Certainly some sweet looking work done on those.

Jay 95WS6

no numbers on mine but let me tell you that my butt o meter feels better and the look is awesome thanks

Jay

andy98Z

iTrader: (4)

Couple tech questions on the TB.

Why is it ok to fill in the section of the TB that is cut for the AIC and Air hose?

I know you have holes for the 2 but do they both work the same?

Does the AIC have to work harder(open up more) due to the smaller hole?

Also, I would think the purpose of the opening for the air hose is mostly to help the air flow from the tube into the intake. But that is a large idleing hole?
Do the TBs require testing and re-modifying to make sure the car idles the same?

ratio411

Could you set up a TB with the porting and all, except change it just enough that it lowers the idle?
My car idles higher than I would like and I don't have access to PC tuning.
Thanks
Dave

SStrokerAce

iTrader: (2)

Filling in the void is worth a good amount of cfm.

The two holes are for the PCV (positive crankcase vent) and the IAC (Idle Air Control). You could delete the PCV if you had a crankcase evaq system hooked up to the headers from the valve covers.

The PCV benfits from the lower pressure in the TB and helps releive the pressure in the engine, which will help oil ring seal.

The IAC basically kicks in when the throttle blade closes. The motor works about the same or less after tha porting due to the plate not sealing as well as it did when there was the rideg in the TB bore.

I have them about 99% right now, so they just bolt on and work. There are the occasional problems but I think I've got them all worked out now. I set the plate angle for idle at a certain spot which I have found works the best so most times now on a stock car it just plugs right in.


Hope that helps.

SStrokerAce

iTrader: (2)

Where is the idle now? What have you changed? There are a few things you can do to mechanically change the idle, but in the end the ECU has alot to do with that because it only allows you to go so low.

ratio411

Just over a grand. This is stock tach, it has been pointed out to me that it could be wrong. I have been toying with cars for a long time, it sounds high.

Just some small stuff.
Ported MAF
Fernco
TB Bypass
Lid
FRA
Revised PCV
Dynomouth mod
After the bulk of the mods I developed a badly wandering idle. I reset the computer and did the idle relearn with the TPS.
I tried to use the adjustment on the throtte blade, but it caused the blade to bind in the throttle bore. I suppose it was already closed as much as it was intended before I played with it. So I put it back to where it wouldn't bind and thoroughly adjusted all the throttle cables to get the slack out.
What else might I try? Is there a way to restrict the idle compensator?
Or something you could do internally to the TB?
TIA
Dave

SStrokerAce

iTrader: (2)

Hmmm...

The Ported MAF could be the culprit.

Did you by the car stock or modified?

Knowing what the idle speed is fromt the computer would be nice, via autotap, but I suspect that it's not that.

The revised PCV? What exactly did you do here?

If the computer has a idle speed set at the stock setting, depending on A4 or M6 it's different, then it's mechanical and most likely a larger than normal idle hole in the blade. That or a faulty IAC motor.

Bret

FAST LS1

iTrader: (2)

I see you don't shave the front shaft off on your TB's. Did you ever flow any TB's with cut front shafts and countersunk screws vs the stock full shaft TB's? I think I asked you this about a year ago and you said you were experimenting with it. Seems like there would be a few more CFM with a shaved shaft.

SStrokerAce

iTrader: (2)

Yeah, I have been doing that for about 6 months now. There were pics of it up here on the forum but since we switch over looks like they can't be found with the search function. That's a standard item that I do now. I haven't updated the pics on the site yet.

Bret

02 'Hawk

Go back to your OEM MAF...

Bret, I'm interested in our TB, do you require a core? I'd like to keep my OEM piece (I'm just weird like that, have my OEM crank pulley still too).

Chris
chris.cottrell@jaber.af.mil

BillWS6Formula

Bret, here's those pics I took of mine (that you ported a couple months back) - feel free to grab 'em for your site if ya want!

FAST LS1

iTrader: (2)

Looks awesome now that you do everything to the TB!
It will be the next mod on my checklist even before a pulley now.

BillWS6Formula

I just uploaded 'em again *L*...get the TB, you won't be disappointed!

FAST LS1

iTrader: (2)

I edited my post BillWS6Formla, thanks

There are also some more pics towards the bottom of this thread.
More TB pics

ratio411

Bret,
I got the car stock.
The first time I noticed a problem was after I cut my EGR pipe that goes back behind the TB. I didn't get it seated good and had a vacuum leak. I fixed this and got the idle stable, also no more leak.
I don't remember what it idled around that time, but that was around the time it started wandering really bad, high then very low.
I was instructed to reset the TPS and do an idle relearn. Which I did... I lost the wandering idle, but it has always seemed to high since.
It is an M6
It has the GM revised PCV, it's not really a valve, but has a tiny straight through hole instead. If you ask your dealer for a valve for your LS1, this is what you get now.
There are no vac leaks.
The cables are tight.
The ported MAF works great.
Thanks for your help.
I will remember you when I am in a position to get my ported TB.
Dave

SStrokerAce

iTrader: (2)

The deal is normally I'll install it, no core charge and no shipping. Then you get to see the gain right there at the track.

Bret

SStrokerAce

iTrader: (2)

Dave,

It seems that your hole in the TB is too big, or I have to do some work to get it to close far enough.

BillWS6Formula,

Thanks for the pics again. I added a different plate screw since that just to get the plate adjustment perfect. I'll have to say it helped a ton and didn't lose any measureable CFM. You got one of the lucky ones with the countersunk screws. Those were very hard to get to work right, so for quality reasons I went to a hex head screw.

Bret