Padre's SS: Let the Modding Begin! (pics&vids)

[Pro Stock John]

Do you have a recent race weight?

[Padre]

Originally Posted by Pro Stock John

Do you have a recent race weight?

No, but I guessed 3950 pounds with me in it. That's based on 3913 stock weight -50lbs exhaust -50lbs wheels/tires -25lbs battery -25lbs misc +160lbs me. +1/4 tank of gas, +30lbs of tools in the car.

Mas o menos.

Padre

[Padre]

I just notice this. I picked up Dynolicious from the App Store for my IPhone. Tried it out on this run:



Couple of things:
1. I used an input weight of 4000lbs.
2. Dayum that thing is accurate!
3. The shift points show me where I can hopefully tweak some more HP.
4. 4.6 0-60 (if I read it right) isn't shabby!
5. How do you like my name for the car? Hehe.

Padre

[Camarowguy]

Ummmm, I was gonna tell you mine ran 13.59 @110.1 on that app because its supposed to be super accurate....but I figured id get the bs flag. Btw, that was with just a tune a vararam. My 60 foot was a dismal 2.5 seconds and I let off right before the run was over. I honestly feel like I have one of those "freak" cars. Out if all the l99 cars I've test drove, the one I bought felt a hell of alot faster. Who knows?

[Camarowguy]

I'll run it again on some better concrete and I won't let out this time and I'll see what it does. I added a ported throttle body after that run.

[Pro Stock John]

What are you thinking of about the shift points? Not that I'm always a maven for mph, but I was thinking that you'd be seeing 112-113... Does the pcm lock up your converter in 3rd?

[Camarowguy]

Btw, I'm loving this thread. Padre, it looks like you gained almost the same from the Shorties and midpipes the same as full lengths, no?

[Padre]

Originally Posted by Pro Stock John

What are you thinking of about the shift points? Not that I'm always a maven for mph, but I was thinking that you'd be seeing 112-113... Does the pcm lock up your converter in 3rd?

I have not changed any TCC or lockup features. The only thing I have changed is to increase the shift pressure (by about 50%) and decrease the desired shift time (by about 0.25) on the 1-2, 2-3, and 3-4 shifts.

The 3200 torque converter adds something to the equation that I'm not enough of an expert at. It works fine now. In the past (in my WRX and my GTO), I have tried commanding lock-up in 3rd and did gain MPH, but on the above graph, it would look like another shift.

Just looking at that chart, I noticed the dip in HP on the shift, and as importantly, the length of the dip. So on one run, I tried subtracting more time on the desired shift time, but I didn't notice a change. You can only "desire" so much shift time, I suppose. Maybe I can add more pressure.

Last month, with the torque converter first installed, I had to add time on the 1-2 shift, because it "gulped" on the shift (commanded throttle position even dropped). So adding time cleared that up.

Basically, from my experience, I do suspect that commanding lock-up in 3rd would gain me less than 1 mph. But I haven't tried it formally on this setup yet.

Timing adjustments have helped me fine tune the car more than the initial transmission tune.

Padre

[Camarowguy]

I suspect the gulp you experienced may be the same thing I get when running the traction control on. If I launch with it on and then tap it off real quick it doesn't do it. My barks the tires pretty hard and I'm thinking that's the issue

[Padre]

Originally Posted by Camarowguy

Btw, I'm loving this thread. Padre, it looks like you gained almost the same from the Shorties and midpipes the same as full lengths, no?

My rough guess right now:

My track results show a combined
+0.365 ET
4.58 MPH
4000lbs
= gain of about 45 HP.
- minus better weather, -5-10hp
No tune (mine was, in the end, just KR reduction timing changes)

So, 35-40rwhp? (Absolute low end = +30rwhp.)

What do LT's, bolt-on only, high-flow cats, with no tune claim for RWHP?

Where's that duck smiley?

Hehehe.

Padre

[Camarowguy]

That's Awsome. Why does everyone frown on Shorties then? Is your gulp possibly what I mentioned above?

[Padre]

Originally Posted by Camarowguy

That's Awsome. Why does everyone frown on Shorties then? Is your gulp possibly what I mentioned above?

I think that's exactly it. More later.

[10spokess]

Dang Lets see those 11 second time slips lol

[Pro Stock John]

Again, thanks for posting all the detail mod by mod. With respect to trap speed, I might not be taking into account the raceweight and the overall gearing of the car. Do you finish the quarter in 3rd or 4th? What's next a small gear change?

[Camarowguy]

If I put mine in sport mode it doesn't do the "gulp" but it doesn't shift as hard as in drive. I wonder if I can swap this around in the ECM?

[AC]

Awesome thread Padre, been following each up grade and trying to keep up on the upgrades. Can’t decide if I want to go high flows next or gears, any thoughts? I don’t have any tune and trying not to use one until later down the road. Thanks a bunch for sharing.

[Padre]

Originally Posted by Camarowguy

Is your gulp possibly what I mentioned above?

They are related somehow, because I did not lift on the throttle, but the reported TPS dropped from 84% (what the computer sees as wide open), to the 40%'s or somesuch. So something in the computer backed you off the throttle like traction control does. But I had traction control off, so the exact cause of the "gulp" is unknown to me. But the fix, for me, was to add more time (back in) to the desired shift time. Just a gut feeling, and it worked.

Originally Posted by Pro Stock John

Again, thanks for posting all the detail mod by mod. With respect to trap speed, I might not be taking into account the raceweight and the overall gearing of the car. Do you finish the quarter in 3rd or 4th? What's next a small gear change?

Exactly. On the chart above, you can see the 3-4 shift at about 10.0s. So I'm in 4th for just 2.1s.

So I have a 3.45 differential from an M6 and it goes in this week (hoping). A6 differential is 3.27. That ought to stretch out the time in 4th, moving earlier the 3-4 upshift. I haven't done the math yet, but I know I'll be happy with an earlier shift.

Anybody want a slightly used A6 3.27 diff? It actually would be great for a 3.73 gear swap from a vendor like Jannetty, and then you could sell your old diff...

Padre

[Padre]

Originally Posted by AC

Awesome thread Padre, been following each up grade and trying to keep up on the upgrades. Can’t decide if I want to go high flows next or gears, any thoughts? I don’t have any tune and trying not to use one until later down the road. Thanks a bunch for sharing.

Thanks. The JBA High-FLow Catted Midpipes fit the JBA Shorties well. But the midpipes are an awkward fit on the stock manifold, works, but not great fitment. Solo makes midpipes too, ask around about their fitment.

I think the JBA Midpipes are a great mod for keeping most of the stock sound and not making the AFM noise worse, as headers do. It's an easy +20hp and easy to install.

Gears are also a great mod for performance and keeping the daily driving good. Torque Converter is great for performance but hurts daily driving (revving higher off the line and therefore noisier).

Padre

[Pro Stock John]

I'm losing my mind, for some reason I though you had gone 12.19@111mph and actually you went 112.89mph... Practically 113mph with bolt-ons is fantastic and just about 4000 raceweight to boot.

How much trial and error has it taken you to figure out the trans tuning with HPT?

[Camarowguy]

Originally Posted by Padre

Thanks. The JBA High-FLow Catted Midpipes fit the JBA Shorties well. But the midpipes are an awkward fit on the stock manifold, works, but not great fitment. Solo makes midpipes too, ask around about their fitment.

I think the JBA Midpipes are a great mod for keeping most of the stock sound and not making the AFM noise worse, as headers do. It's an easy +20hp and easy to install.

Gears are also a great mod for performance and keeping the daily driving good. Torque Converter is great for performance but hurts daily driving (revving higher off the line and therefore noisier).

Padre

I was thinking about a 2800 stall convertor like a yank convertor. I don't want to do anything that I will regret. As I said before I think I got one of the faster cars and my goal is to run in the 11's. I'm planning on doing everything you have (except wheels) plus a ported tb, underdrive pulley, cam and dyno tune. I think you'll be in the 11's with gears once you get your tune lined out perfectly.

[10spokess]

Originally Posted by Padre

Thanks. The JBA High-FLow Catted Midpipes fit the JBA Shorties well. But the midpipes are an awkward fit on the stock manifold, works, but not great fitment. Solo makes midpipes too, ask around about their fitment.

I think the JBA Midpipes are a great mod for keeping most of the stock sound and not making the AFM noise worse, as headers do. It's an easy +20hp and easy to install.

Gears are also a great mod for performance and keeping the daily driving good. Torque Converter is great for performance but hurts daily driving (revving higher off the line and therefore noisier).

Padre

What Gears did you go with again?

[Padre]

Originally Posted by 10spokess

What Gears did you go with again?

Originally Posted by Padre

So I have a 3.45 differential from an M6 and it goes in this week (hoping). A6 differential is 3.27. That ought to stretch out the time in 4th, moving earlier the 3-4 upshift. I haven't done the math yet, but I know I'll be happy with an earlier shift.

Anybody want a slightly used A6 3.27 diff? It actually would be great for a 3.73 gear swap from a vendor like Jannetty, and then you could sell your old diff...

.

[Padre]

Originally Posted by Pro Stock John

I'm losing my mind, for some reason I though you had gone 12.19@111mph and actually you went 112.89mph... Practically 113mph with bolt-ons is fantastic and just about 4000 raceweight to boot.

How much trial and error has it taken you to figure out the trans tuning with HPT?

I did get 112.95 with run one.

The tranny tune with HP Tuners was done after a lot of research on their forums and elsewhere. But it boiled down to simple changes in the pressure and desired shift times. I changed it only in shifts 1-2, 2-3, and 3-4 since that's all I need at the track, and around town I put the stock tranny tune back in. Actual adjustment at the track took just a few runs and one tweak (when I had the gulp).

Padre

[Padre]

Originally Posted by Camarowguy

I was thinking about a 2800 stall convertor like a yank convertor. I don't want to do anything that I will regret. As I said before I think I got one of the faster cars and my goal is to run in the 11's. I'm planning on doing everything you have (except wheels) plus a ported tb, underdrive pulley, cam and dyno tune. I think you'll be in the 11's with gears once you get your tune lined out perfectly.

As I indicate earlier in the thread, I have the 3200 FTI from RX. Big advantages are that it's billet, lighter, and new.

I personally do not recommend going with a reworked stock converter (as many are). No reason not to get a new one that is lighter and stronger, cheaper and with no core charge or anything. You may get more daily driveability out of a 2800 stall, but I don't know if it would do as well as mine did - four-tenths.

Oh, and I still have my Meziere Electric Water Pump and my SLP Underdrive Pulley waiting to go in. They'll go in after I get my 11-second slip with the gears.

Padre

[Camarowguy]

Are you gonna do the water pump and pulley separate? I'd like to see the gain of each. I didn't think yank was a reworked stock convertor? I was either going with one of those or a vigilante. I picked up almost a second on my third gen with a vigilante.