Originally Posted by lasater

I think I do.

Originally Posted by 2005HHRauto

The Jerico Air-Shifted 5-speed is clutch-less, so it really is kind of automatic...

Ethanol , is Gods racing gas... LOL


But really, the OP needs info on keeping his 4t45e, living a long life...

For long 4t45e longevity:
1. Reduce shift time in half , via HPTuner.
2. Increase the torque reduction in 1st gear, 0-3,500rpm
3. Use 100% synthetic fluid , & change it, every 2 years.
4. NO super sticky street tires, as you don't want to 'dead-hook', on the street.
5. Experience ?? I just turned 62 , so I kind of know, how to drive wisely, & not beat up, the equipment ??

And really, our little buggy, is so easy to mod:
1. Just a 'tune', any 'tune' , will wake it up, & make it a true muscle-car, & oh so fun to drive...
2. 'Tunes' can be mild-to-well thought out, our buggy is so easy to 'tune', really no wild 'tunes' needed, as a wild 'tune',
is really a bad 'tune', a 'tune' that isn't well-thought-out.
3. A simple, well thought out, gasoline 'tune', WILL be so streetable, & also be, a mid 13 second beast, at the track.
4. An Ethanol 'tune', + some really simple mods, WILL still be 100% streetable, = run 12s, at the track.


These simple mods = 12s , at the track.
1. E47 Ethanol 'tune'.
2. K&N air intake system.
3. Coring the 2nd cat.
4. TTech engine mount.
5. Slicks, or really good drag radials.
That's it, it really is that easy...
A 'tune' , 2 aftermarket parts, modding the 2nd cat, & good tires.

For me to go 12.3s , I had to add a 3" cat-back, + light-weight rotors, & wheels/tires, saving 100 pounds, BUT sill, 100% streetable.
It is still 100% streetable, gets 30mpg on highway trips, if I'm really trying, LOL , & I drive it year round, in Pittsburgh winters too…
I just reprogram to trans, for 2nd gear starts, using the "I", shifting position, in the winter, for reduced torque, when starting out on ice, or heavy snow... LOL

FUN FACTS
Run E20 , if you have Ethanol in your area.
5/1 ratio = 5 parts E10 91/93 gasoline , + 1 part E85 = E20.
Your engine will love it, run better, last longer, more power, try it, NO tuning needed, ...
If you 'core' the 2nd cat, NO tuning is needed.
If you add the K&N air intake system to your buggy, NO tuning is needed, & this system, will cause your stock 'tune', to be better...
If you add the K&N intake system, 'core' the 2nd cat, + run E20 , NO tuning needed still, & your buggy will run so sweet...

My Buggy is 100% stock, expect for the following mods:
1. E47 'tune'
2. K&N air intake system.
3. TTech engine mount.
4. 'Coring' , of the 2nd cat.
5. 3" cat-back exhaust, ( needed to go 12.3s , instead of 12.4s), LOL. A cat-back, is really not worth doing...
6. Lightweight rotors/wheels/tires, & 4 lug wheel bearing hubs, for my 4 bolt Enkei 9.5lb wheels. Rotors are now, stock cheap 1996 Honda Accord, on the front, & cheap Honda Civic STI, on the back. Saved 100 pounds doing this, feels great on the street, & knocked one tenth, off of my 1/4 mile times.
Definitely NOT worth it, & I would never do this again. I really expected more than a tenth, at the track, doing this...
So, if I had too do it again, I would skip steps 5 & 6 , & be happy running 12.5s at the track, instead of 12.3s.

Originally Posted by 2005HHRauto

I overboost, for the awesome torque spike, that Ethanol provides.
That is what makes it easy, to get into the 12s.
Not my dyno chart, but another automatic HHR SS on E85:


Shifter in 'D' , with just traction control off.
Boosted brake launch of approx: 2,700 RPM works best for me...
Will your Trifecta 'tune', let you 'boost-launch', if not, your screwed.
Only slicks, for 'wrong-wheel-drive', it's a waste of effort, with drag radials...

I don't think that they make an LSD, for the 4t45e, if so, I really don't see it helping much. Cost & effort, most likely great, with unknow return ? With good slicks, you can't go wrong.

I thought about going with an ZFR, to get into the 11s, put I truly believe that the 4t45e, would die, & spilt it's guts, all over the track...

This is my Max-Air-Load curve, for the street.
For the track, I have found that I can boost-launch' best, with, Max-Air-Load , set to 100%, everywhere, no ramp up curve, as shown, just a straight line, no curve:

Originally Posted by 2005HHRauto

I'm turning, 1.7s 60', foot times, & this is really pushing it, with the stock 4t45e.
I think that this is close to the limit, for this automatic.




Since the LNF ECM is torque based, every LNF, is boost-ramped, or torque limited, in one way, or another, by the 'tune', factory, or aftermarket...

Boost-ramped is just a polite way that the 'tuner', is telling you, yea, I 'tuned' you, to provide your car, with more power/torque, but since you have wrong-wheel-drive, I'm going to take most of your awesome power/torque, gains, back, in 1st, & 2nd gears. Yea, that's what the factory GM 'tune' does too…

Here's what our stock factory boost-ramped curve, looks like:



Here's what my, NO boost-ramped curve, thru the gears, looks like:

So, the 1st, & easiest 'tune', is for your 'tuner' to spend 15 seconds, to change just this table, to give you full power, in ALL gears. You'll think that he is a ''god', but all he did, was to give you the power/torque, that you allready had…

Screw that, I want ALL of that gain, ALL of the time, I even want to OVERBOOST, thru the gears, to make even more, of that sweet,sweet, power/torque.
I'll deal with the power/torque gains myself, thru self-control, slicks, or hay, watch how I can toast the tires, on this little 4-banger ...

Since Trifecta has , 'select-a-tune', have them give you ALL of that power/torque, back, with a switchable 'tune'.

Originally Posted by Nazgul 9

Did this over the weekend.. auto with trifecta tune.

im 515