EF7 hybrid ZC/D16a6 Turbo. Indexed

[Coupe-R]

good shit, it does look like rocket science with the off centre cooler

nah jokes

hey about your head hitting the roof, I have the same looking bucket seat brackets.
IF they are like mine then they are different each side, try swapping them around and it may let the seat lean on back a little further so ur head won't hit the roof.

[doo0T!doo0T!]

Originally Posted by Coupe-R

about your head hitting the roof, I have the same looking bucket seat brackets.
IF they are like mine then they are different each side, try swapping them around and it may let the seat lean on back a little further so ur head won't hit the roof.

Yeah I've looked at that but they are already as low as they will go if I keep the sliders. The seat is hard down against the bolts and cant drop any further front or back.
If I want it lower I'll have to ditch the sliding rails.

[monsterbishi]

mean bro.

so whens our race?

you did say slips aye

[doo0T!doo0T!]

Originally Posted by monsterbishi

mean bro.

so whens our race?

you did say slips aye

Ha ha hell no.
I'll let you know when I go into Beyond, you still wanna come along? Be good if you could I'll need moral support while my baby is getting it's tits thrashed off.

[s0cks]

Originally Posted by doo0T!doo0T!

Cheers man.
I see you're from the 'Ku , I grew up out there, went to Waiuku College, Have the girls gotten any better looking yet?
Uku hard.

I reckon so. Some hott young ass down here now! Supportin the Waiuku masseeve.

/me makes westside hand gesture

[monsterbishi]

yeh ill come down bro.

[Spanky69r]

Originally Posted by doo0T!doo0T!

Cheers man.
I see you're from the 'Ku , I grew up out there, went to Waiuku College, Have the girls gotten any better looking yet?
Uku hard.

waiuku chicks getten hot? haha come on thats a bit hard haha jokes
actually i just met a chick on sat night that went to waiuku collage

[doo0T!doo0T!]

Originally Posted by Spanky69r

waiuku chicks getten hot? haha come on thats a bit hard haha jokes
actually i just met a chick on sat night that went to waiuku collage

What was her name we could dig up some dirt on her.

[Coupe-R]

does ur bucket seat fit inbetween the sliders and brackets?
I have my seat mounted lower than the sliders towards the back,

e.g. I have the two brackets bolted to the sliders, then the bucket bolted to brackets. The seat sits inbetween the sliders on and incline so the actual bottom of the fibre glass seat at the back is lower than the slider level it self.

the factory seat level where ur ass goes is also below the slider level if u look.
This is to seat ur self away from the roof and so u are looking out the middle of the windscreen

[doo0T!doo0T!]

Originally Posted by Coupe-R

does ur bucket seat fit inbetween the sliders and brackets?
I have my seat mounted lower than the sliders towards the back,

e.g. I have the two brackets bolted to the sliders, then the bucket bolted to brackets. The seat sits inbetween the sliders on and incline so the actual bottom of the fibre glass seat at the back is lower than the slider level it self.

the factory seat level where ur ass goes is also below the slider level if u look.
This is to seat ur self away from the roof and so u are looking out the middle of the windscreen

Nah the rails in the JDM EF7's are only 400mm apart. The seat will never fit between them, the seat is actually wider than the rails over all and to get it all to go together I had to put the inside seat bracket on the other way so it folds around under the seat rather than out from it. If you get what i mean.
It also brings the two seats nice and close into the middle of the car so the steering wheel is straight ahead rather than slightly off to one side.

[doo0T!doo0T!]

Well the initial Dyno tune ended up happening today.
She got picked up at 8am thismorning and flat-bed trucked out to Beyond2.

Fairly early on we discovered that the turbolink was fried and would not boot up, which explains why i had trouble getting an igniter signal through it. Gay.

With a quick decision needing to be made i decided to go for a Gizzmo CamFC and Evo 8 injectors instead of my elaborate turbolink system.
I'm a bit gutted about all the time and effort (not to mention purchase) that went into getting the turbolink an assosiated shit and sorted out, but hey at least it's up and running now. Properly.

I swapped in the new injectors (560cc 8) ) while Mark worked on another car and then I had to go to work for a few hours and while I was away they wired in the CAMFC

I got back at 3pm just when it was rolling onto the dyno.


Very early on it was evident that there were two problems,

a) the hall effect sensor in the dizzy is getting intermittent interference from the magnetic field around the Mallory and leads. It'll run up fine but the rev limiter will kick in at random intervals for a split second because the interference has sent a zone into 7000rpm plus.
This got worse as the car heated up and the resistance in circuits rose.
it wasn't a major problem but enough to be a pain in the ass and frustration becaus ethere was nothing we could do about it except disable the Mallory.

b) the second problem is my T25 is too small. It just cant produce the boost needed for higher power output and boost at high rpm, I was reaching full boost at 4200rpm, like it was spooling up real fast and then from 4200 up the boost just dropped right back down to 6psi at the imposed rev-limit.

I dont quite understand why either, seen as the set up is virtually identical to what Nigel ran in Lowfreq and he saw 170wkw and 12.5psi, even at redline



I'm a bit gutted about the lack of a legendary peak power number I can skite about but before the boost drops off the power curve is excellent and the torque is excellent, peaking at 250NM

Mark reckons I'll have to upgrade to a 200sx T28 or TD05 if i want to see higher boost
This was with the ECV shut and the rear exhaust system used as they needed to for the Air/Fuel equipment. I'd expect a resonable gain with it open as like it is right now there is no such thing as gas flow, it's restrictive as hell.

Gay Photobucket wont let me upload the vid (in any format), it's a shit vid anyway.

So all in all a day of mixed success, I never got to see how well my Turbolink set up would work but I now have some serious injection capablility to play with in the future.
I ended up with 122.3wkw (166whp) on the best run but on an earlier run the power peaked at 127wkw but the rest of the power curve was rough.

I dont think the fact that i missed my power goal of 170wkw by a long-shot matters as I'll have 250nm to play with at 4200rpm, hello passing lanes 8)

A bigger turbo will make a huge difference but i think I'll get used to driving it like this first.

Next time i go in for phase 2 with my bigger turbo there'll be a different motor in the hole:

Race prepped, ported and cc'd head
H beam rods.
Knife-edged lightened and shot peened crank.
CSL cams (Mugen rally copy)
155lb valve springs
Skunkworks camgears
Endyn roller wave 9.5:1 compression forged pistons 30 thou over
SS exhaust valves.

i have most of this stuff waiting in the wings, I just gotta buy the pistons and valves but wont be doing that for a while.

[doo0T!doo0T!]

O.k so I've done some more thinking and despite what Mark has said to me about my T25 not being able to produce boost at high RPM, I am having a hard time believing this is the problem causing the low boost and consequent low power output.
I agree that the T25 is operating on the edge on it’s intended envelope but I cant be convinced that it’s performance would be as lame as today suggested.

Either using the rear exhaust system is so restrictive that it is causing problems or it's loosing inlet manifold pressure somewhere or by-passing exhaust gas somwhere. (it’s not a smooth transition from the collector to the rear exhaust system and will be creating some major turbulence and high pressure, the system is designed to use the dump and is designed to flow towards the dump) Unfortunately due to the air/fuel ration equipment constraints we couldn't use the dump.

When you compare today’s dyno sheet and a previous sheet from Nigel's car with the same engine which used my same system. (not a similar system but this exact one, the car being tested on the Gizzmo print-out is the car I bought to rob all the bits off including the turbolink even the fuel pump and FPR etc)

I can not see any logical reason why the turbo will only produce 6psi at 6000rpm on my current engine, but used to produce 13psi or 12psi at 6000rpm on the old engine and peaking at 14.5
There must be something wrong.

Also the power outputs are so different that it can not simply come down to the differences between Gizzmo’s hub dyno and Beyond's in-floor roller dyno. We are talking a 50Kw difference!

Obviously that 50kw is being produced with the additional boost which the other motor was making, so that leads me back to the beginning in asking where the hell did that boost go? and why can’t we make it on this current engine? Why is it that the two engines produce such drastically different boost pressures?? It equates to roughly double at 6000rpm.

At some stage I'm going to try one more run with the dump pipe open to see if it makes any major difference, if it does make a positive difference then I'll know it's not losing manifold pressure or exhaust pressure through a leak or bypass, if it makes no difference then I'll know the exhaust is not the problem.

[d16a7]

your ignition could be creating issues..

but yeah lofreq hauled... and damn surely somethin is up? same exhaust manifold? uhm the exhaust system wouldnt matter too much (well not 50wkw )

i dunno maybe your losing pressure though something somewhere?

*EDIT* just re read that your ex. design is to mostly flow out the exhaust dump.. now that could be creating the issues.... you can only rule that out by opening it up... and yes as you say turbulence... (NO pun intended) could be an issue

and t25 should be ample for a 1600 its not like you are wanting to run 20PSi and have 300wkw or are you? :twisted:

[turbozxi]

Standard exhaust system definately be a huge restriction why didn't they open your dump pipe? Other then that your clutch could be slipping as the TQ increases with the extra boost or the tune is garbage. Did you get an A/F readout?

That sucks about the turbo link!

I'll shoot ya a PM

[turbozxi]

Upon further reading you sure there were no boost leaks? How did they plug up where the extra injectors were?

[xsiv]

sorry to here ur having problems, it took me two trips to the dino to get my car tuned peroperly and still it was down on power as the motor wasent up to is.

you will sort ur problem out,
i would have liked to see ur car power output with ur dump pipe,
i ask the same question why dident they open it.

how much did it cost to change out ur turbo link and extra injectors (if u dont mind me asking)

[BTLF3D]

Originally Posted by turbozxi

Standard exhaust system definately be a huge restriction why didn't they open your dump pipe? Other then that your clutch could be slipping as the TQ increases with the extra boost or the tune is garbage. Did you get an A/F readout?

That sucks about the turbo link!

I'll shoot ya a PM

i think they have one of the o2 meters that just clam onto the exhaust tip, thats probly why.
Weld a bung onto the dump pipe and do it properly :wink:

[doo0T!doo0T!]

I just think they couldn't be fucked, they didn't really listen to anything I had to say, despite the fact that I have built nearly everything on the car.
They didn't check any of the signal voltages like TPS or MAP despite me wiring in a voltage clamp (which was never calibrated properly) etc.

I tried telling them about the dump but apparently i didn't know shit.
It was Mark's last day before he goes to Fiji and then he's leaving as soon as he gets back so i just dont think it got the tune it deserved.
120wkw my ass. Somthing is up and I'm going to find out what.

[doo0T!doo0T!]

Here's two dyno sheets to show how much my system is underperforming.
Lofreq's one....Gizzmo hub dyno, turbolink system, dump open.

My system, beyond roller dyno, CAMFC system, dump closed (boost levels not shown) peaked at 12 dropped back to 6

[nzcivicracer]

Bummer dude!! Somethings definitely up though. Just look at the difference in torque curves. You should take it to another tuner, Turbo Vehicles maybe? & run it with the dump pipe open. Your stock pipe could be choking the turbo as it shoots straight at the dump valve.
Also, what compression were you running compared to LOFREQ? Have you lowered yours from stock?
I'm sure you'll get to the bottom of it

[Bananaman]

I am not convienced it is exhaust related. Maybe has some small part to play but what are you using for boost control? Internal wastegate or external. Maybe it is opening to early and bleeding off the extra boost.

A GTR skyline will only see 2-3 psi difference when going from stock exhaust to a full 3" system. I couldn't see it losing 6+ because of the exhaust.

[turbozxi]

Originally Posted by Bananaman

I am not convienced it is exhaust related. Maybe has some small part to play but what are you using for boost control? Internal wastegate or external. Maybe it is opening to early and bleeding off the extra boost.

A GTR skyline will only see 2-3 psi difference when going from stock exhaust to a full 3" system. I couldn't see it losing 6+ because of the exhaust.

I have an r34gtr exhaust here there bloody nice factory exhausts be twice the size of a stock zc if not more.

Opening the dump pipe without having it on the dyno I think it will make a drastic difference to the A/F ratio so may not be wise to do it unless tuned for it.

[xsiv]

a few things came to mind that might help

try checking to see if ur wast gate is seating peroperly
u might have got a hot weld spark on ur wast gate flange,
i did and had to reseat my wast gete valve into the flange.
it might be holding it open a tad.

also was ur turbo internal gated oringanly. if it is did u weld the internal wast gete shut as it will blow open and make it alot harder to spool boost??
this could be a big problem like ur having

if ur internal wastgate is set a 6psi it will open a 6psi stopping ur external wastgate from oppening at 10psi because their is not enough flow going through ur turbo etc
or if it was welded it might have broken

[doo0T!doo0T!]

Originally Posted by Bananaman

I am not convienced it is exhaust related. Maybe has some small part to play but what are you using for boost control? Internal wastegate or external. Maybe it is opening to early and bleeding off the extra boost.

They've just slapped a GFB bleed valve on it. Rangipoos if you ask me but there you have it that's what they recommended.
The waste gate is external but is shit quality and could be opening or not sealing properly I'll look into it.

Originally Posted by turbozxi

I have an r34gtr exhaust here there bloody nice factory exhausts be twice the size of a stock zc if not more.

Yeah the stock GTR exhaust actualy flows, the design I have to get the gas out the back is only intended to passing a warrent (with the dump blocked off :wink: ) and has no direct flow into it.
My exhaust is not a factory ZC one, it's a 2 1/2 inch tig welded mandrel bent (probably HKS originally) with one resonator and a forza-flow at the back. The system it'self is fine but it's how it mates to the collector which is the problem.
i dont think they understand fluid dynamics as well as they should.

Originally Posted by turbozxi

Opening the dump pipe without having it on the dyno I think it will make a drastic difference to the A/F ratio so may not be wise to do it unless tuned for it.

Exactly my thoughts, I asked them if it's safe to run with it open on the current tune and they said it'll be fine. Logical? No.
Even revving it with no load with the pipe open makes hesitations.


Here's some pics to make it clear the difference between the two exhausts. Lofreq ran a dump like this too and had 133kw with it closed and 170 with it open, it will make a massive difference.