Turbo planning

[KoolBRZ]

Originally Posted by AVOturboworld

What? We've turbocharged a lot of 6AT's, and never had that issue.

Do you own one? I do. Do you know of anyone who can recode the transmission controller? I don't. I'm not saying the AT doesn't shift at all. It just won't shift manually, under boost, in my car, tuned with an OFT OTS turbo tune. Techstream only has a few basic options, and I haven't heard of ecutek or OFT having any AT options either. What were these turbo AT's tuned with? Maybe you should only go turbo if you tune with ecutek. I don't use ecutek or anything other than RomRaider and OFT, so I don't know the capabilities of other tuning solutions. I did experience the unresponsive shift paddles numerous times during the month I had my turbo.

[AVOturboworld]

Then it is an issue with OFT, not with turbochargers. We only tune with Ecutek.

I own a manual, but we've sold over 300 kits worldwide, 28 of them local to the PNW. Several of the local customers have the 6AT, and one has had his 6AT turbocharged for over two years now, I believe. Not a one has come back to us with that issue. I drove one of the 300whp 6AT setups, and it was an absolute blast to drive. And I did use the paddle shifters.

[cdrazic93]

and the plot thickens.....to be honest, the whole loosing boost from the turbo to shift vs supercharger is...well ill just let someone else handle that.

[JS + BRZ]

Originally Posted by KoolBRZ

Do you own one? I do. Do you know of anyone who can recode the transmission controller? I don't. I'm not saying the AT doesn't shift at all. It just won't shift manually, under boost, in my car, tuned with an OFT OTS turbo tune. Techstream only has a few basic options, and I haven't heard of ecutek or OFT having any AT options either. What were these turbo AT's tuned with? Maybe you should only go turbo if you tune with ecutek. I don't use ecutek or anything other than RomRaider and OFT, so I don't know the capabilities of other tuning solutions. I did experience the unresponsive shift paddles numerous times during the month I had my turbo.

[cdrazic93]

He still wont get it.

[KoolBRZ]

Originally Posted by cdrazic93

He still wont get it.

That's right. I won't get it. So long as I use an OFT. I like being able to change my own tunes and get help from others on the forum. I wouldn't get free software, or help changing tunes with ecutek. I'd have to pay for the tunes, the license, and pay to retune it for any hardware modifications I make. the software learning curve is steep, and full access software is very expensive. Open source software is free and people are able to share what they know. Ecutek is costly software, patented, and people could be sued if they share what they know. So, if you know anyone who is boosted, drives an AT, and tunes with an OFT, let me know.

[Toyarzee]

I hear that you can only manually shift AT if you remove both your sway bars, seat belts, and get a smaller steering wheel. Then you're totally safe.

What makes you say a AT is somehow stronger than the MT?

[AVOturboworld]

Originally Posted by KoolBRZ

That's right. I won't get it. So long as I use an OFT. I like being able to change my own tunes and get help from others on the forum. I wouldn't get free software, or help changing tunes with ecutek. I'd have to pay for the tunes, the license, and pay to retune it for any hardware modifications I make. the software learning curve is steep, and full access software is very expensive. Open source software is free and people are able to share what they know. Ecutek is costly software, patented, and people could be sued if they share what they know. So, if you know anyone who is boosted, drives an AT, and tunes with an OFT, let me know.

Whatever tuning solution you want to run, that's up to you. I'm not going to argue about which is better or which is worse. But you did state that the 6AT manual shift mode doesn't work with turbochargers without mentioning that it may possibly have to do with OFT.

This is going to be the problem with any guide per se, in that it will be put together by a bunch of people that don't necessarily have the same experiences as others. There is a multitude of different turbocharger kits, and each different kit design will have different needs for best performance.

For instance, a turbocharger kit based around a large turbo (as in 50+ lb/min of flow) is almost certainly designed around the idea of going e85 or race gas, whereas the "smaller" turbo kits will work better on a pump gas setup. Some kits ship with a fuel pump and injectors, some don't. A turbo kit that doesn't see full boost till much later in the rpm range may not need a clutch at 300whp in comparison to a kit that sees the same 300whp but is generating it's torque peak much, much earlier in the power band.

All these variables does make it difficult to post a one size fits all guide. Somebody that lives up in or near Canada is much less likely to need an oil cooler in comparison to somebody living in Nevada. That's why I shy away from the "must get oil cooler" statement. Not to mention that some kits have less cooling needs than others...

[snowdog]

Thanks for all of the comments.


Still didn't hear any recommendations on internal thresholds or differential. Any thoughts

[AVOturboworld]

To a degree, finding the thresholds on the internals is like finding the thresholds on bridges. You keep putting more and more into it until they break. But engines are expensive to keep rebuilding, so...

If you don't want to worry about internals, my opinion is to stick around 300whp on pump gas and 350-380whp. That's not the limit of the engine, that's staying well within the limits of the engine.

[IBill4You]

Don't forget cam block off plate, clamping the PCV solenoid hoses, and upgrading the PCV valve. You should probably plan on learning how to create and interpret data logs too. These are things to consider with any FI on these cars.

[erbaker67]

Do you think we can get the goals/hp list going?

For example:

250 or less

250-300

300-350

350-400

400+

Obviously is going to vary depending on kits, and I am sure other mods as well. I think this along with the 5,000 +/- thread will help a lot of people out.

[raytrix]

Originally Posted by D_Thissen

I realize that. 7psi on a 2871 vs 5858 are totally different because of the amount of air going through the motor. My goal for power is around 250 to the wheels with quick response. I haven't seen a lot of people with similar goals. Yes there are kits that will make 250, but a lot of people upgrade to make more power. I find it also difficult to sort through all the material because A) there's a million pages B) a lot of side tracked comments and C) just differences in opinions. I could always call vendors, and report back.

You sir are probably looking at a Greddy T518z turbo kit. It'll give you very quick response (starts spool at 2500rpm and full spool at 3500rpm). 250whp is the target on that kit from 7psi stand point.

[D_Thissen]

Lol figures I pick the expensive brand haha