BGTV8 VQ40HRGA Race engine build

ZontheRocks

Looks a bit naughty. Can’t wait to hear and see more.

__________________
'16 Pearl White Sport | Stillen Gen. 3 | Motordyne ART | Motordyne Shockwave | ZSpeed | Powertrix | EVO-R | Aeroworkz | Nismo | Z1 | EcuTek | Tuned by Seb @ SpecialtyZ

BGTV8

So we now have overcome pretty much all of our teething issues.

1. Getting the M150 to understand the VQ37 engine has been a massive challenge. Not a lot of knowledge in this part of the world. Has taken months (my engineer is a personal friend and he has worked on my car for "mates-rates" which means he puts time into the car when he doesn't have other cars to work on
2. We are running 6 x Jenvey ITB set up with a single Bosch Motosport DBW motor and getting this set up to advance the throttle blades on each bank sync'd has been a challenge - you have no idea how much overall torque can be affected by one bank leading the other by as little as 2%
3. The engine in the car (original still until we can test the car and sort out a chassis setup we are happy with) has not run for 3 years and we had some CAS and cam control issues to resolve

So, at least you can now hear the 6 x ITB induction noise at WOT and full load. Best described as orgasmic.

We are off the Winton Raceway (Victoria, Australia) next Tuesday for a systems check (chassis setup/handling, ECU/Dash config, cockpit ergonomics etc). We are only running R-Spec tyres for the moment and won't put slicks on the car until the dry-sumped engine goes in when sorting is complete. Provided Tuesday test goes OK, we are running in Production Sports Cars at The Bend Motorsport Park in Sth Australia and the program has the 4-litre engine installed for Island Magic at Phillip Island in November.

A couple of video's of WOT throttle tuning are here:

https://youtu.be/6TKbKmfg7rs

https://youtu.be/PRZUC9AhkOg

Spooler

I feel your pain, I am using an Emtron. Firing it up next week I hope. I couldn't get an M150 so I had to go another route.

BGTV8

Yeah, anyone making electronic kit is having trouble getting supply.

The Motec is a complicated beast .... very function rich and lots of interconnected settings.

Good luck with the Emtron - they are neat poece of kit

Rusty

Good to see the Z is up and running. I know it's been a long road for you.

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Spooler

The Emtron is really good. Right up there with the Motec. Just about done. Need to setup the safeties and fun features. It's close.

BGTV8

So we have tested the last 2 Fridays.

On the 21st, things did not go so well. We lost an hours and a half finding and fixing an oil leak at the rear of one cam cover. At some stage, it had taken a knock and there was a hairline crack that was rectified with sealant but the biggest problem was blowing a high-pressure fuel pump fuse twice in the afternoon - clearly something was not right and we did not have the time to pull the tank out and inspect to find the issue.

Last week was spend re-doing the fuel system (found a partially blocked pre-filter in the internal fuel pot which was the root cause). We used the standard tank with CJ Motorsport road race system which works a treat by the way, BUT with the cage in place, serviceability is not great - takes an hour to get to the pumps and ~30 minutes to stitch everything back together, so we've gone for a tank above the floor with external lift and high-pressure pumps that are instantly accessible so its is much better for serviceability.

Some lucky Aussie is going to get the CJ Motorsport system in the near future for 50% off.

Last Friday we tested again (3h20m tow to the circuit). The car ran flawlessly - still running the wet-sump engine and R-Spec tyres (6 years old so not very quick) but I did 6 x 25 minute session and it did not miss a beat. The CIRCO pads are brilliant and the 4.08 ratio and Quaife 1:1 top 6-speed sequential works like an old school bolt-action rifle - slight tug on the lever, the Motec cuts fuel for ~100ms (it is programmed for a 300ms BUT as soon as it senses that the box is in the next gear, it lights the fire again). We log over 200 channels in the ECU and up-shifts take between 90 and 120ms - and the power seems absolutely seamless.

We did have a bit of rich misfire but tweaked the tune and eventually enabled close-loop lambda and picked up a couple of 10ths.

I found the limits of braking fairly quickly with a tour thru the kitty litter at T10 and the limits of grip on the sweeper with an off into wet grass but stayed away from the concrete.

Lap times are nothing special as we are 150hp down on the "fat" engine which will be in the car for a Nov race event but I am learning the car as braking and handling are staggeringly good.

The chassis is that stiff that if you jack the car from the front sill behind the front wheel, the rear rises at the same rate as the front - we reckon we have torsional stiffness of 25,000 kg per degree of torsional twist in the chassis which is why the handling is so good. We made a few suspension setup changes and you could feel the changes on the outlap.

There are still 16 items on the do-list (mirrors, oil/filter change, measure pad wear, minor maintenance items like that). Am really happy with where we are - has only been 7 years since this started but that's life when you are self employed and unsponsored

First event will be on 20-Aug with a 1-day club race event (quali and 3 x 20 minute races).

A few club track-days after that and then the fat engine goes in.

BGTV8

Well, the car has had its maiden race event (with standard engine)

FB post is here - hopefully you can see it

https://www.facebook.com/groups/zclu...eric&ref=notif

BGTV8

Well, the car has had its maiden race event (with standard engine)

FB post is here - hopefully you can see it

https://www.facebook.com/groups/zclu...eric&ref=notif

Averying

Can’t see it if we aren’t a member of that Facebook group!


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Spooler

Most of us don't do the Facebook stuff.

sx moneypit

BGTV8

Apologies for FB SNAFU



So Victorian Sports Car championship Round 4 has been run and the maiden event for the #50 ProdSports Z34 went to plan with an untroubled day.

Times were not anything special (Keith Flanagan you lap times are not threatened yet).

The mega wing is too draggy for a standard engine - I picked up 15kph on entry to T1 by taking 1-click of wing out and will try removing one more the next time at PI.

The chassis is brilliant - T1 mid-corner improved to best of 187kph and it feels like it could take more and this is on 6 yo R-Specs. 1-click wing less made no difference to mid-corner grip and it felt like T1 could be close to flat - that's the level of confidence the chassis inspires.

Brakes are similarly outstanding (AP six pots on the front on 14.25" rotors and 4-pots on the rear on 13" rotors with CIRCO pads. In the end, I was diving inside 75m into Honda and still it was stopping. T1 I was braking after turn in which is inside 50m and there was not a hint of slide mid-corner. Note that speed on entry is down though as it is draggy.

No slicks until I have a dry-sump engine installed - planning on that for Island Magic event at the end of Nov this year so still significant grip to come
.
I am having to unlearn nearly 35 years of experience based on my "other" car as the Z handling and grip is just so superior.

A bit more grunt and optimised drag and slicks will see the times drop.

Off to the final round of our state championship on 15-17 Sept

Attached Images

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Spooler

Good deal. Having fun with it now. I will be back at soon myself.

ZontheRocks

Great photo!!!!!

Cat looks and sounds mean! Glad to have been following along with this build.

__________________
'16 Pearl White Sport | Stillen Gen. 3 | Motordyne ART | Motordyne Shockwave | ZSpeed | Powertrix | EVO-R | Aeroworkz | Nismo | Z1 | EcuTek | Tuned by Seb @ SpecialtyZ