Project 12s Turbo VT V6

[private9]

Good progress mate! Definitely a call in the market place for something at this level - best of luck with at all!

[SnipeZ]

They're like t10-15 I'm pretty sure.
They're not cheap though. Around 200 or so.
In the grand scale they're not too bad.

Easy job though


Cheers

[SnipeZ]

There's 2 different modules. So get the right one and you'll be fine.


Cheers

[turbo_will]

Seems to be a common fault with them, at first I thought maybe a wiring problem but after some quick googling abs module seemed to be the problem. Disconnected it and all lights go off except abs/traction and airbag. Temp gauge then works again. Seeing radiators cracked im going to do a vz conversion with the cap on the radiator which will get rid of the factory header tank setup, will need the room for a decent dump pipe.

For the vt im thinking I might try the supercharged memcal and 36lb injectors as a start, not looking to run big power or too much boost.

[justa6]

Keen to see what you do with the ls1.

[turbo_will]

Got this all finished and been driving it around a bit. Got all my logging gear hooked up and after replacing the dead alternator it was time to see how badly this would lean out on the stock tune. Not surprisingly even 5psi off the gate spring had afrs out past 15:1 at 4500rpm. Thought this would happen but without trying it myself you never know for sure. Factory tune is prity lean every were, never under 13.5:1. Im surprised there was no pinging even with 6month old 91 in it still.

Boost comes on strong and fast with the spool plate fitted, the commos seem to have a loose-ish factory convertor which no doubt helps. Without boost it would stall to 2500rpm and a few pounds boost sees 2700rpm prity easily. I have a stock supercharged memcal and 42s for it to try next. Radiator sprung a leak so that needs replacing before much else.

[turbo_will]

Put 3 tanks of fuel through this sorting things out. The supercharged chip/injector combo didn't run to great had a big rich spot down low at wot and was still too lean on boost. Standard fuel pump cant keep up to much more than standard as with an extra 1600cc injector it still leaned off big time as revs increased, as my fuel system gear hasn't arrived yet we hooked up a water/meth kit for now with 2000cc jetting and 20/80 mix. Added some extra boost and at 10psi it seems happy on the stock n/a tune and afrs are ok. Without any additional fueling afrs were past 18 and it was so slow lol but still no knock. Only time its knocked was after being on the limiter in 2nd and then changed into 3rd few little pings then as it loaded up hard.

Times have tumbled, best 0-100 5.74, 90-140 4.78, 140-150 1.27 and 14.1@105mph

New issue is trans smashing limiter 3 or 4 times before slipping into 3rd. The 2-3 shift takes 1.5secs at the moment haha. The 1-2 shift is sweet as. Rear main leak has got worse, box will need to come out anyway.

Couple of vids

https://www.youtube.com/watch?v=SNbX-CtBzg0

https://www.youtube.com/watch?v=T1-7KWiGsDw

[Sloxr6]

Thats pretty impressive bit of work. You should see how the cars go stock before the turbo's are put on would be interesting to see how much time they actually pick up after the turbo.

[Bob Lablaw]

You make it sound easy, keep it up

[turbo_will]

Threw the GTECH on my ls1 A4 VX to compare times to the boosted VT. The VX is stock other than the usual exhaust and k@n panel filter. Managed a best 0-100 of 6.35, 90-140 5.085secs and 1/4 14.9@100mph prity decent for a basically standard car. Comparing the two cars 0-100s the ls1 is much faster to 30kms then the turbo is in front from anything over that. A launch on some boost with traction would fix that.

I've entered the vt in the next street meet, have a .500 boost valve for the trans to fit while replacing rear main seal and need to sort out locker for the diff. Not expecting much first time out 13s would be nice as a start.

Cheers guys, would go better if they weren't such heavy cars. Yep I tested its times stock 0-100 8.39sec, 1/4 15.79@89mph, 90-140kph 7.78sec and 140-150 took 2.89. It was quick for a stocker, most are in the 9s 0-100. The 140-150 time is more than halved they are just so slow stock over 100kms

[turbo_will]

Went to the drags last night did a best of 12.9@107mph which im amazed with for first time out in this car. First few runs were all gay 96-100mph missing in 3rd and slow as a bus off the mark. Something was wrong but I wasn't sure what. Tried an ecu reset, next run I was stalling it up to around 2500rpm power seemed ok again and suddenly the revs dropped to 1500rpm and it lost power, ecu reset and was all good again. The sump had been hitting kframe setting off knock sensors. To get around this I plugged spare sensors in and cable tied them out the way not mounted to the motor. Way better and next pass was 13.5@106 on a crap launch. Next pass stalled it harder and hooked a 1.96 60ft and went 12.9@107mph. Run after that cooler pipe blew off and dragged along the track, scared the shit outa me, called it a day after that.

Prity surprised with how easily it ran a 12 so might have another crack in june when the next street meet is on. Definitely needs a minispool and some et streets. Open wheeler skids are gay. Maybe some bigger jets for the water/meth and some more boost. Its still on 10psi at the moment I reckon it would take a few more psi without trouble.

I also fitted a .500 boost valve to the trans and its bang on at the moment for this power level, a little slip into 2nd and 3rd but not jerky trans smashing changes. Apart from that still std ecu with 2000cc water/meth spraying in from 4psi.

[turbo_will]

Spent the last few weeks chasing issues with false knock setting off knock sensors, retarding timing big time making it slow and misfire. Would stall up to 2500rpm easy with full timing but once in the low timing map it wouldn't budge past 1500rpm. Probably due to this poor old high km motor being clapped out and suffering some light rod knock and lifter noise etc. Seems I somehow got lucky at the drags as ever since then it would retard timing and generally act up. Ecu reset would fix it for a minute if your lucky. Tried all kinds of things, new sensors etc. Ended up mounting both knock sensors on a 10mm flat bar drilled and tapped and hanging off the bolt were the alternator bracket went to the intake manifold. Seems to have fixed the problem thank god. Obviously I don't care if this motor pops, disabling the knock sensors isnt the safest idea haha. Ecu must also freak out if it does not receive noise as leaving them cable tied out the way didn't work even when I earthed the knock sensors back to battery.

Seems to be going ok again now, might need a corvette servo as 1-2 change is still a bit slippy. Not limiter bashing but definitely struggling. Cracked a 5.8 0-100 just off the footbrake no stalling up which aint bad for a open diff. Got a mini spool ready to fit next.

[turbo_will]

Got bored with 10psi after a while as you do so fitted a boost tee and started winding it in. Added an extra 7th injector with a 1600cc indy coming on at 10psi. Up to 16psi boost now with a 40/60 water/meth mix on the stock ecu/tune lol. Goes prity hard but got to be careful to keep it off the limiter and it pings if you boost it before the motor is fully warmed up. Prity much on the limit with factory timing and 98. Trans hates the extra power though bounces off the limiter 2-3times on both 1-2 and 2-3 changes. Got a corvette servo for the 1-2 just need to fit it. Roll ons in 2nd at 60kms gets plenty of wheelspin but it still grips heaps well and pulls hard. Times have improved a bit, hitting limiter on 2-3 is killing it though. Racing again end of this month if its not broken.

70-120 in 2nd gear 2.896
80-120 in 2nd gear 2.317
90-140 2nd+3rd gear inc shift 3.807

[turbo_will]

60-190 km run

https://www.youtube.com/watch?v=Shaq...ature=youtu.be

This thing goes twice as fast when its cold/not warmed up haha. Dunno if it runs more timing cold or just cold motor but 2nd goes straight to limiter in 60km roll ons. Used to ping cold but added more water now never pings. Not the best idea thrashing it cold but hey this will be scrapped in a couple of months moving on to boosting my vx ls1.

[Bob Lablaw]

that's mean as, i'm not clued up on the water meth, do you run it through the 7th injector? how are you controlling the injector, just through a Extra Injector Controller?

[turbo_will]

The water/meth has its own nozzles and is a separate system to the main fuel setup. The 7th fuel injector is just activated by a pressure switch and is either on or off haha. Works great at WOT but at partial throttle it just floods it with fuel.

[turbo_will]

Threw this on the dyno today to check afrs. Had to drop the boost a tad to 14psi and is still border line too lean. Only made 236rwkw at around 4000rpm, power comes on strong but at full boost was misfiring badly shaking the whole motor. Probably needs new leads/plugs haha. Tried a run without any water injection which only made 210rwkw and was pinging massively.

[galapogos01]

Seems to take a hell of a lot of punishment man!

[turbo_will]

Haha yep, as do all my cars, test the shit out of them. I would love some more dyno time its just soooo expensive down this way. This was about 5 pulls in 20mins for $150

[turbo_will]

Pulled the diff centre out today in preparation for fitting minispool when/if it arrives (long story lol), got the ring gear off no worries and went to knock the 3 roll pins out but they wouldn't budge. Finally split the centre to find the roll pins had all snapped allowing the pins to spin and what a mess that made. 20tonne press wouldn't budge the pins, the socket I was using started to deform haha. So plan B lots of nuts and bolts jammed in spider gears then welded together. Test drove it today few launches etc all good. Dosnt really hook up any better on the street I think the spiders were basically locking under power anyway being as bad as they were.

Also think I found the culprit for the misfiring, annoyingly number 5 lead had come unclipped rubber boot was still on but the metal clip wasn't on the plug properly. Went ok today no issues. Next up fitting corvette servo to the auto.

[turbo_will]

So its been a while, ended up fitting the corvette servo in car which was not an easy job haha. To be honest I didn't notice much difference doing this. Its heaps better driving with the mini spool though way more predictable now. Also remounted and went back to single m14 jet 50/50 mix, no ping and pulls clean with this jetting. Remade turbo manifold for more lead clearance as kept nuking lead one and don't want to heatwrap manifold. Changed to a 1750cc injector for the 7th injector and upped boost to 15-16psi goes hard for what it is, keen to see how it will do at the track.

Racings been postponed 3 times already from wet weather so havnt been out again yet. Then rego ran out and i decided to fit up my old nitrous kit for the drags aswell seeing as im only planning to race once more before stripping the car for parts an moving on to the next project. Ill lean on it hard boost only and if its still together by the end of the day spray the bitch for the last few runs for a laugh haha. Got some well used 2nd hand 255ets mounted up, they have a few passes in them still.

[vegabass]

Get some footage of the final harar

[the sam]

Can't wait for the choo choo fucken bang at the end of the strip after it's eaten some N2O.

Although, going off this thread, seems like you couldn't kill the fucken thing if you tried.

[DJV8T5]

this is awesome, seeing the r&d side of things. I agree, I want some vids of the final runs, see if you can kill it lol

[turbo_will]

Hopefully someone can film it, at this stage weather is looking bad again for Saturday but hopefully that changes. I have 125hp jets I could fit that should well and truly overdo it, although the way this things hanging together I wouldn't be surprised if it takes it lol my moneys on trans slip spoiling the fun.

[turbo_will]

Pic of relocated knock sensors


Engine bay, yes it is messy remember its just an RnD hack.


All checked over and ready for racing feels strong as just stalling it up. Gave it a quick spray of nitrous in the carpark bakes them instantly haha.