Good start to the new year.

I got my electrical license the other day, it was a long 5 years (cert 4 in engineering) but got there in the end!

Should be able to afford to finish off my motor build that's been sitting in pieces for quite a while now.

Engine spec's

Acl forged pistons
Stock rods with arp's bolts fitted and resized (might get some eagles)
Heads rebuilt with 1mm oversize exhaust valves + some port work
Cometic Head Gaskets
Blocked prepped and bored 40thou over
Engine assembly balanced
tech@epr modified oil pump and windage thingy
port matched upper/lower plenum
ported out stock manifolds (might ditch these for some big ones)
ams dumps
ams balancer (not sure if I want to use it though)
750cc Jecs injectors.
think that's most of it.

Things I need

timing belt kit
ARP head studs
a few little bits and pieces and I think that's it.

All engine work was organized or done by Niall. I was going to assemble the motor myself but after adding up how much its costing I might give the pieces back for assembly just in case I F**K it up.

I have some hypergear highflow turbo's on my current motor but I'm thinking I might ditch them for some 28r's or even 28rs's if i get the forged rods.

Anyway just thought I might share where I'm at with my Zed obsession.

 

Congratulations on getting the quals. Many start, but only a few stay the distance.

The Zed will sure appreciate the extra attention from your newly acquired free time.

 

Sounds great Chris, its a nice mod list. I think you should change turbo's you've never really been happy with them have you

 

I think it was faster with stock turbo's to be honest.

 

Thanks, I should probably clarify I wasn't at uni that's just what my certificate was called I did an electrical/electronics apprenticeship, so yeah probably have less free time now.

 

a big congrats on the certificate, the commitment to study .. and, of course, ZED love .. !!!

 

sevenangrypenguins: any chance of having look at your dynosheet with boost and afr to see whats happening? What sort of mods are you running? There could be a million things wrong with the Z thats affecting its power out put then the turbos. Also check to make sure actuators are both pre-loaded to about 4mms or they becomes very laggy.

Current high flows are running 350Hp RS equivalent CHRAs. We might be making ceramic BB with machined billet wheels (available for Tx and RBxx engines) for high flowing later this year depending how much time and moneyis available on the Z turbos project.

 

Its road tuned at the moment but I'll put it on the dyno before the motor comes out. Tuned to 11.5 WOT.

Not sure by what you mean when you say 4mm? Actuators were set by you at 1 bar and that's when they start to open.

Mods are basic - injectors, nistune, exhaust, front mount, blitz bov's, motor compression all pots above 160

The only thing that I can think is holding it back is the npower dumps, its not hitting full boost (20psi) until close to 5k rpm. I'll fitup the ams dumps first as well just in case its them.

 

the n power dumps held mine back but not so much in lag, more in total power and boost.

would be good to see it on a dyno

 

With stock injector and factory remaped ecu to suit stock turbos I've managed 272rwkws. Nistune and customized tune map with injectors should get 300rwkws+.
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Turbo wise it is laggier then factory turbos. I think .49 rear housings off GTR turbine housing with GTRS turbine wheel is more suitable for the 3L 300rwkws applications but debatable.

N power dumps are not really suitable for high flowed or aftermarket turbos. need to get proper 3inch full through exhaust, factory cat needs to go, and need to make sure all flange sizes for the exhaust are 3inches.

It is perferred to have 3inch intake pipes for per turbo, intake restrictions slows shaft speed causing lag, boost issues and high EGT.

If the actuator was not altered then the sittings on them are fine.

When I had the Z I also had o2 sensor issues, knock sensor issues and bunch of electrical problems that made the power out put inconsistant. Nistune are pretty good in finding those problems, make sure they all working.

 

did you have higher fuel pressure on the stock injector car?

 

I have no boost leaks or electrical problems car drives smooth and holds boost to the redline (1.27bar)

I think the turbos are just blowing a lot of hot air, I can't have anymore than 14deg timing after about 4500rpm as it just starts pinging (with boosted stock turbos was running between 17-20deg no troubles).

I'll try a re-tune with colder plugs and the ams dumps, before I write them off.

 

teh n power dumps caused similar problems for me, i was running 16 deg after 4500 which i thought was still quite low

 

About what are you running at the moment with your high flows Nial?

 

at the moment ive got it at 17psi, that made 396rwhp though

The "phillips performance" exhaust and the extra matching work i did really paid off. i think ive got between 16 adn 17 deg ignition after 4500

I boosted it on teh dyno and stopped increasing boost when teh hp jumps didnt tie in too well with the boost increases if you know what i mean.

I think im getting pretty much max efficiency out of these turbo's. On a tune that needs improvement 400rwhp is awesome on 17psi

 

Yeah I would be stoked with those sort of numbers as well.

 

My car had I think its a stock fuel reg. It had a remapped ecu at Zshop to suit stock turbos and factory setup. I had it dynoed after getting it back and it made 273rwkws.:
http://www.digi-hardware.com/images/dynosheets/atr25/vg30dett273rwkw.jpg

Also another member's car with similar mods and factory injector made 271rwkws:
http://www.digi-hardware.com/images/dynosheets/atr25/vg30dett271rwkw.JPG

Benny's made 320rwkws with injectors.

If its "blowing hot air" I would suggesting checking any intake and exhaust related restrictions. It means the turbo has issues sucking in or dispatching air. And here is a an example:

Below is from intake pipe restrictions based on a RB25det:
http://www.digi-hardware.com/images/dynosheets/atr43/puvsrick.jpg

I would be looking to see the sort of curve it would be outputting on a dyno.

 

Look how laggy both those graphs are, not making full boost or decent power till 5000rpm. I think my peak power will be close to the 270kw your getting. But that lag makes it feel slow and no fun to drive.

Going by the second graph that car is making about 100kw at 3500rpm, with stock turbo's I was making over 200kw at that rpm.

 

just checked my dyno graph, mine doesnt make 200kw till 3500 and its in the full power zone from 4100. and thats with just about every mod to help spool up

 

This is benny's as you probably already seen:
http://www.digi-hardware.com/images/dynosheets/atr25/vg30dett429HPDyno.jpg
I think same mid range more top end with injectors and custom map.

Its pretty obvious you will get more lag by using larger wheels, which shifts the power band towards the higher RPM range.

They are only 3cyc 1.5L engines per turbo, I think the .49 GTR rear housings high flowed with RS turbines are probably better choice for the VG30detts. I'm not sure about the smaller Auto turbos which also might be the go.