Long time lurker, first time poster. I've been going through almost all of the 1.8T specific threads on this forum, and firstly wanted to thank all of the people who've documented their builds, their experiences with different tunes, and generally provided information; it's made everything for me a lot easier.
I own a MK7.5 Golf 1.8T with the Tiptronic/Slushbox/09G transmission, and am looking on some more information on how this transmission pairs up with different setup/tunes:
1. IS20 or IS38? From my understanding, the IS20 is generally the most common turbo upgrade for the 1.8T, but with it being a smaller turbo, the torque is more instantaneous and that is what can cause issues with the 09G's torque converter and send it into limp mode, so some people suggest running with the IS38, as the cost difference is minimal, has a better top end, and pairs better with the 09G because the power is more linear (?). Again, this is just my understanding from reading through various FB groups and forum posts on here; if I am incorrect, please let me know, but I'd like your thoughts on which turbo pairs better with the slushbox tranny I have (NON-DSG, just regular auto).
2. What tune? I'm currently running the Stage 1 APR IS12 91 Octane tune on an otherwise stock Golf, apart from wheels/tires. What's my best tune option if I were to go with a IS20/IS38? I'd rather stick with APR, since I've already spent the $600 on a stage 1, and upgrading to their Stage 3 IS38 tune would be relatively cheap, but if jumping ship to something different is better, I'm open to it. If anyone with a 09G transmission and a bigger turbo could comment on their experiences with reliability, power, etc on the following tunes:
Options:
APR Stage 3 IS38 91 Oct
APR Stage 1 IS12 91 Oct (current) w/ JB4 stack (will have to buy the JB4 new for support from George)
Reflect Tuning (cost? experience with them as far as power, reliability, etc)
A different OTS/canned tune?
I'm sure I'm missing something, so are there any better options?
Since I live in California, 91 octane is as good as it gets, but I do have E85 readily available all around me. This isn't a necessity, but which of the above options would best be able to accommodate E85/ some sort of ethanol mix?
I know these are very specific questions for a very niche part of the GolfMK7 community, but hopefully someone could guide me in the right direction considering my situation and the fact that this is a daily driver that needs to be as reliable as can be (lol) but can pull hard when it needs to.
I own a MK7.5 Golf 1.8T with the Tiptronic/Slushbox/09G transmission, and am looking on some more information on how this transmission pairs up with different setup/tunes:
1. IS20 or IS38? From my understanding, the IS20 is generally the most common turbo upgrade for the 1.8T, but with it being a smaller turbo, the torque is more instantaneous and that is what can cause issues with the 09G's torque converter and send it into limp mode, so some people suggest running with the IS38, as the cost difference is minimal, has a better top end, and pairs better with the 09G because the power is more linear (?). Again, this is just my understanding from reading through various FB groups and forum posts on here; if I am incorrect, please let me know, but I'd like your thoughts on which turbo pairs better with the slushbox tranny I have (NON-DSG, just regular auto).
2. What tune? I'm currently running the Stage 1 APR IS12 91 Octane tune on an otherwise stock Golf, apart from wheels/tires. What's my best tune option if I were to go with a IS20/IS38? I'd rather stick with APR, since I've already spent the $600 on a stage 1, and upgrading to their Stage 3 IS38 tune would be relatively cheap, but if jumping ship to something different is better, I'm open to it. If anyone with a 09G transmission and a bigger turbo could comment on their experiences with reliability, power, etc on the following tunes:
Options:
APR Stage 3 IS38 91 Oct
APR Stage 1 IS12 91 Oct (current) w/ JB4 stack (will have to buy the JB4 new for support from George)
Reflect Tuning (cost? experience with them as far as power, reliability, etc)
A different OTS/canned tune?
I'm sure I'm missing something, so are there any better options?
Since I live in California, 91 octane is as good as it gets, but I do have E85 readily available all around me. This isn't a necessity, but which of the above options would best be able to accommodate E85/ some sort of ethanol mix?
I know these are very specific questions for a very niche part of the GolfMK7 community, but hopefully someone could guide me in the right direction considering my situation and the fact that this is a daily driver that needs to be as reliable as can be (lol) but can pull hard when it needs to.