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

[Dyldo]

Its done! It runs, its smooth, its only running 10psi at the moment till i get a boost controller... but for 10psi its pretty damnn quick

The thoughts of what it'll be like at 20psi are scary!

I'll post a full update tomorrow, now its boosting time

Man, I am stoked for you. Having chatted to you by PM and email, and swapped ideas, i know what you went through to land this sucker and am very happy for you.

[gecko2k]

Well done! Followed ur Thread for a while....nice!


oh yeah:

Video or fake !!!!

[blue32bingo]

Awesome job!!

If I could tell the difference between a flat head and a phillips head screwdriver I'd love to do this (plus have the cash).

Have you spent a lot of time working on cars - making your own dump pipe you must have a fairly good level of mechanical aptitude?

[McDub]

liking the sound of this, but i want that video you promised!

[WhO]

Sorry for not having uploaded a vid yet, its 100mb and i havent had the time to re-size it. Same with photos, i had intended on having them done yesterday but running around trying to find fuel line fittings ate up the whole day.

Fitted the fuel pump today, ended up putting it in a corner of the engine bay, it worked out to be the neatest and easiest place to put it. I've run a trigger wire from the standard fuel pump so it only runs when the stock pump is running.

I'm now starting to wonder if ordering the Superpro "race" dogbone bushing was a good idea... Looking at the exhaust i've put one section of it way too close to the chassis so really i should just fix that and the thumping will stop. I'm still keen to get a better bushing for the dogbone because the motor moves a crapload but maybe the Street / Sport one would've been a better choice. Ahh well we'll see, if it causes too much vibration i'll either swiss cheese it or sell it. Anyone potentially interested in a Poly Dog-bone Bushing?

Blue32bingo: I've been tinkering and pulling things apart since i can remember. I've never worked as a mechanic or fabricator and my dad has two left hands when it comes to anything mechanical but i've worked with cars ever since i've been driving and before that it was pushbikes so i guess you could say i'm pretty mechanically able. I've amassed a decent array of tools in the past years because i've looked at many jobs with the mindsed of if it costs x to pay someone to do it and costs y to buy the tools, if Y isn't unreasonable and its something i can do then why not buy the tools, do it myself and get the job done but get to keep the tools and experience to boot!

This project entailed me buying a tig welder and teaching myself to weld alloy and stainless. The total cost of the welding equipment was probably around 1.5k but its already paid for itself from the savings in labour as well as the capability it has given me to do other jobs. Also Argon is great for preserving open bottles of wine being an inert, heavier than air gas (same gas the pro's use)

Anyway Dyno is booked in for 9am tomorrow, i still dont have my Electronic Boost Controller so i'll have to make do with a bleed valve, hopefully it works! Wish me luck, i'm hoping for somewhere in the region of 350-400whp but time will tell!

[WhO]

Thanks mate! If your ever in Adelaide let me know and i'll take you for a spin and run you through the details of the build in more depth

[WhO]

So it was on the dyno today. All ran pretty well fuel mixtures were nicely in check, bit rich with a few wavey bits in the curve but for the most part good. We were off to a slow start, at first the car would only run 10psi of boost. After much screwing around and one accidentally eaten vacuum hose we figured out the sticker on the manual boost controller which pointed to the wastegate was actually around the wrong way thus after swapping it around more boost could be had.

First run was at 10.5psi and the car made around 196fwkw. Boost was dialed up to 12psi and power jumped up to around 220fwkw However any further increases in boost made no power with the power curve flat lining so to speak at the same point each time.

Following this i was pretty sure that there was a flow restriction somewhere either intake or exhaust. Since i was pretty confident with the intake i was pretty sure that my 2.5" rear section from the cat back of the exhaust was causing the hangup. Unfortunately this was the case and no matter what boost the rear section of the exhaust ended up not letting the car make more than around 220fwkw

As i wanted to make sure this was the case i took the exhaust off and gave it a few more runs. It went well. Immediately wastegate boost pressure lifted to 12.5 psi and made 226.4 kw and with the boost wound up it made 264.8kw at 17psi Unfortunately as we couldn't put a lambada probe into the dump pipe we couldn't check fuel mixtures thus my mechanic wasn't keen to run it any higher just incase mixtures weren't ok.

Anyway so far so good. I'm getting my mechanic to make a new rear section of the exhaust for me next week as i simply cant be bothered to make any more exhaust work myself.

All in all i'm pretty happy, disappointed that i couldnt make more power with the exhaust but happy that it quite easily cracks the 200 mark at just over 10psi and should hopefully crack 300fwkw around 20psi.

Stay tuned for more! I'll attach dyno sheets shortly

Cheers,
Rob

[WhO]

Graphs of power vs boost

12.5 psi run - cant remember if exhaust was on or not here, i dont think it was


17 psi run - no exhaust

[WhO]

Just installed the Super pro stage 2 dogbone main bushing. So much better ,much much less engine flex and to be honest there's hardly any extra vibration, probably helped lots being a vr6 as they're smoother than the 4 cyl's.

[McDub]

First run was at 10.5psi and the car made around 196fwkw. Boost was dialed up to 12psi and power jumped up to 226.4fwkw However any further increases in boost made no power with the power curve flat lining so to speak at the same point each time around 226kw.

Following this i was pretty sure that there was a flow restriction somewhere either intake or exhaust. Since i was pretty confident with the intake i was pretty sure that my 2.5" rear section from the cat back of the exhaust was causing the hangup. Unfortunately this was the case and no matter what boost the rear section of the exhaust ended up not letting the car make more than 226kw

As i wanted to make sure this was the case i took the exhaust off and gave it a few more runs. It went well, made 264.8kw at 17psi Unfortunately as we couldn't put a lambada probe into the dump pipe we couldn't check fuel mixtures thus my mechanic wasn't keen to run it any higher just incase mixtures weren't ok.

damn that's a lot of power, insane
congrats

what motor has your bora got again? 2.8 vr6 is it?