A long time coming, Rob's 4motion turbo build!

[Back Door Shenanigans.]

yup, i was hoping to be the first BoraT in Oz but alas, my work ethic and wallet stopped me

congrats Who, i hope you nail it first time too. You and I have chatted heaps about it and the good thing is our builds will be different.

You and me two haha, at least i can still be the first in WA i hope. I should talk to you two on how you planned and came up with what parts you needed. How much you guys looking to spend well whats the budget. Thats all thats stopping me at the moment is the dosh. Other than that looking good Wh0

[Dyldo]

You and me two haha, at least i can still be the first in WA i hope. I should talk to you two on how you planned and came up with what parts you needed. How much you guys looking to spend well whats the budget. Thats all thats stopping me at the moment is the dosh. Other than that looking good Wh0

I've dropped you a PM. send me your email and i'll send you back my build spreadsheet with costs, parts, etc and a build plan. Mine's different to a few guys i've spoken to, which is awesome cause we should have a whack fleet of BoraTs.

[WhO]

Would recommend going for a different set of brakes than the R32's unless you pick them up really cheap 2nd hand.

Already got a set at a pretty reasonable price so i'll see how they go!

WOW! That's what I'm talkin about! Did you source locally or OS? I'm wanting to do the same but hard to find others who had or are doing a turbo build. I take it the house is on hold?

A large component of the items i'm getting are being sourced from OS, both because of price and availability considerations. House is not on hold but progress is slower lol

You and me two haha, at least i can still be the first in WA i hope. I should talk to you two on how you planned and came up with what parts you needed. How much you guys looking to spend well whats the budget. Thats all thats stopping me at the moment is the dosh. Other than that looking good Wh0

Let me know if you want a breakdown of my costing too, just be warned whatever you think it'll cost, take that figure and add lots to it.

[WhO]

Got bored at work tonight so decided i'd do the maths and figure out how well a GT3076R will actually work with a VR6.




The three lines show the turbo's operation through 3200rpm-7000rpm at different levels of boost calculated according to desired crank hp.

Note figures are approximate however all looks pretty good to me, You can see that at 500hp at ~ 22-23psi @ 7000rpm the turbo will be slightly past the choke line not ideal but only just. At the bottom end around 3200rpm (peak torque on a n/a 24v vr6) the turbo is just past the surge line, not really a problem in this instance though as there's no way the compressor is too big! Although its probably a bit out of the ideal range for efficiency its not too bad and still acceptable.

@ 450hp ~ 19.5psi the turbo's sitting pretty with the line nearly smack bang in the peak efficiency range and @ 400hp ~ 16psi the turbo is pretty much at peak efficiency. Good considering my base line boost will be 15-16psi with me running up to 22 for when i feel the need for speed!

All the hp numbers are crank figures so can be expected to be less at the wheels and as with all things they are really only estimates thus i wouldn't be surprised if real world figures varied greatly, who knows, maybe even up to 20%. Only time will tell! At least by punching out these rough numbers i've been able to satisfy myself that my turbo choice for what i'm after is pretty much ideal

[thestu]

Subscribed. So many good projects in aus that are only coming out NOW! keep up the good work champ!

[Mr. JLT]

Good to see another turbo project. Did you get the Sai and Cat deleted out of the software? I would say closer to 30% drive train loss due to 4-motion plus the weight 1500kg depending on interior of the bora. You could also run a 3.5" exhaust or a 3.5" Dp into a 3" exhaust. Let me know you have any questions. Keep up the good work

Cheers J

[WhO]

No tbh i'm not sure if they have deleted them out of the software, didnt actually occur to me to get them removed. Is there much of a gain to be made? I'll still be running a cat for emissions reasons but i cant see any reason why i couldnt get rid of the Sai.

Finally finished the lower half of the intercooler. I've welded all the lower pipes and will have a couple silicone hump joints connecting them to the upper half on each side to give some flex and movement. No more progress will be made on the cooler side of things till i get the head spacer on and turbo and manifold mounted up! Now its the waiting game for parts from the US, untill then i'll prolly work on getting the head and gearbox off

[AusScare]

Good luck with the build buddy.

What have you got in mind of handling mods? Coils, porsche brakes, bigger sway bars...?

[mk3pete]

you should get your head ported.....
and lower intake runners to match

[WhO]

No more progress as such to note but the i finally got onto 034 motorsports and my ARP rod and Head bolts are in the mail as is my fueling kit and other goodies from C2

Yesterday my clutch arrived from Ultrarev in the US too, ahhh so many bits arriving!!! Gotta get back onto getting everything happening!

[WhO]

Ah dammit, got my ecu's back from C2 and appears they've programmed my spare with the turbo file but done the immo defeat to my original ecu instead of my spare ecu :/

Dammit... waiting to hear back from c2 now to see what they say.

[DNA Tuning]

Have they done a file for the same setup before?

[WhO]

I believe so. The reason i believe they've put the immo defeat on my original ecu is because they've written on the ECU's what they've done to them.

My standard one has written on it "12-01-10 stock ecu" and "12-01-10 C2 Immo Defeat"

My spare one to be used for the turbo software has "12-01-10 C2 stg3 24v 630cc 4"maf"

Thus i am thinking they thought the ecu i wanted re-flashed with the tune was my original ecu thus they didnt need to immo defeat it and that what is actually my original ecu was just a spare that i bought and thus needed the immo defeat done on that instead.

If thats whats happened i'm a bit disappointed because i clearly marked on my standard ecu "Original ecu please dont modify / re-code" and clearly marked my spare ecu as "ecu for re-flash"

[Mr. JLT]

have you tried the ECU yet. Chris is pretty straight fwd!

[WhO]

I havent been able to since the cars in many pieces! Oh well on the up side if the ECU does need to go back to C2 i guess i can take the opportunity to get the SAI and Cat deleted from the software!

Edit:

Chilled out a bit now, Called C2 today and although i couldnt speak to chris as he's out of the office till next week the guy i spoke to thought that both ecu's had the immo defeat performed on them. I'm still confused as to why they would've immo defeated my standard ecu but oh well as long as the second one has been done that all that matters. Still, i'm looking forward to chris's reply to my e-mail to confirm this but things are looking up again.

Hopefully the SRI intake and head spacer arent too far off so i can get things cracking on

If it wasn't 41 degrees today i'd pull the gearbox off and get that done... oh well, more procrastinating!