Sportsguy's LS2 Swapped BRZ

[Sportsguy83]

Originally Posted by lbroskee

only ppl i trust behind my wheel 1. work more then me, 2. are outta town

thats y i've been tryna find a DIY option since July is still far off, but still it's plan B

I'll let you know what I do, but its very probably my solution will not work for you because it will involve either moving the turbo discharge pipe, or getting a new one made.

[lbroskee]

Originally Posted by Sportsguy83

I'll let you know what I do, but its very probably my solution will not work for you because it will involve either moving the turbo discharge pipe, or getting a new one made.

true, but if not im all ears

[King Tut]

Originally Posted by Sportsguy83

BIG Win today!! Swapped actuators for the 5 psi one and FINALLY have a working Wastegate!! Turned up the boost in the MBC, so now boosting around 8 psi. Sent some logs, now waiting for refined tune.

Can you make me a boost curve graph now?

[King Tut]

Originally Posted by Sportsguy83

#2, My overpipe is hitting the frame. (See below pics). Next step is to disconnect the turbo discharge pipe and try and move it higher which will result in the overpipe connecting higher to it and probably clearing the frame completely. It is not hitting it all the time, but in high vibration situations, it hits. As a last resort, I may go and get that Turbo discharge pipe made from 3" pipe and routed to avoid the overpipe issue.

Loosen all the exhaust connections. Stick a pry bar in there where you need more clearance and then tighten everything back down. I had to work with my JDL overpipe and uppipe to get the clearance I wanted as well:

[Sportsguy83]

Originally Posted by King Tut

Can you make me a boost curve graph now?

I haven't forgotten about you!! Next tune John sends me, I'll do the pull.

[King Tut]

Originally Posted by Sportsguy83

I haven't forgotten about you!! Next tune John sends me, I'll do the pull.

Awesome. I am still working on my EBC settings to get the best curve I can. I am almost there.

[Sportsguy83]

Originally Posted by King Tut

Awesome. I am still working on my EBC settings to get the best curve I can. I am almost there.

My MBC is kind of weird. More PSI every gear?? Its like doing boost by gear on its own.. LOLLL

7 and change psi in second, 8 + in third almost 9 in fourth and haven't checked more than that.

[King Tut]

That seems very strange.

[Sportsguy83]

Originally Posted by King Tut

That seems very strange.

The state in their instructions that you should check PSI at 3rd or 4th, because if you check in 1st or 2nd, PSI will be higher at higher gears, but I don't understand why.... Probably they designed it like that, but what have they done different than any other MBC and why did they do it like that.

I put the universally recommended half hole preload in the WG.

[PrimeMotoring]

If after you adjust the downpipe and overpipe and it still rattles try upgrading your motor mounts. The motor rocking around on the stock mounts will cause it to move. With the mounts all nice and solid it could fix it.

[Sportsguy83]

Originally Posted by PrimeMotoring

If after you adjust the downpipe and overpipe and it still rattles try upgrading your motor mounts. The motor rocking around on the stock mounts will cause it to move. With the mounts all nice and solid it could fix it.

I installed Perrin mounts last weekend mostly because I wanted to see if it cured this. It didn't, but I'm pretty certain the pry bar below and loosening the midpipe and turbo discharge pipe should work!

Thanks for the suggestion! On another note, I get compliments on the gauge cluster EVERYWHERE I go (well, except for user ft sjo LOL)

Hope everything is going good Mike!!

[BRZranger]

Regarding the overpipe hitting the frame, running a 2.5" pipe through there was already a pretty tight fit (vs the 3" ). We ended up using the AVO 2.5" over pipe and have not had any issue with contact. But I have the auto which trends to have less engine movement during shifts.

[Sportsguy83]

Originally Posted by BRZranger

Regarding the overpipe hitting the frame, running a 2.5" pipe through there was already a pretty tight fit (vs the 3" ). We ended up using the AVO 2.5" over pipe and have not had any issue with contact. But I have the auto which trends to have less engine movement during shifts.

It IS a very tight fit!!

Ihave the solution pictured in my mind, but the pain in the ass is going out and doing it LOL. Worst case scenario, a new 3" turbo discharge pipe an inch shorter will for sure do the trick.

[AVOturboworld]

Originally Posted by Sportsguy83

The state in their instructions that you should check PSI at 3rd or 4th, because if you check in 1st or 2nd, PSI will be higher at higher gears, but I don't understand why.... Probably they designed it like that, but what have they done different than any other MBC and why did they do it like that.

It's not the MBC's fault, it has to do with engine load and turbochargers. Turbochargers respond better as the engine load goes up. The higher the gear, the higher the engine load due to gearing. Same reason a clutch won't hold in 6th gear, for instance, but would in 4th.

So generally, you'd see the turbo reaching peak boost in 1st and 2nd gear around 3000-3500 (assuming you even have time to pay attention), then dropping to 3000 in 3rd, then 2500-2800 in 4th, then even quicker in 5th/6th.