238 replies to this topic

[bazeng]

Nice!

Your boost control also seems better too with the .63

What controller are you using?

[steve]

Boost is controlled by the haltech using their solenoid controlling a turbosmart 45mm gate. The drop in boost at the end of the run was actually intentional by Mick for a bit of safety, I'm really not sure how much safer dropping 1psi is though

I'm interested to see how much fatter we can make the curve if we can get the boost into it a bit lower. The dyno sheet below is from a mate's 180sx - 2L SR20, same basic specs (turbo, cams, static compression ratio) as my car .. check out where it's making 25psi:

http://www.silviansw...08/IMG_6242.jpg

It's a VERY impressive car to drive, and an absolute monster on the street.

[steve]

Nothing spectacular today, ran a bunch of 11.60s @ 124-125ish mph. The car was down about 5mph to half track, but was putting on 30mph in the top end (it used to only put on about 25-26).

The clutch was ratshit by the end of the day (had 12 runs or so), and might be why the car was slower to half track earlier in the day before slip was really noticable.

[iluszn]

Congrats on the car dude.. Nice power curve and good runs. So what clutch are you looking at changing to?

[steve]

I'll keep the OS twin that's in the car and just get a new set of plates for it. I might try and get some tilton ones or something - I think Baz had tilton plates in his OS? Anyway, the clutch lasted 30 k of abuse, so I'm pretty happy with it.

Here's a couple of vids of me getting chopped up by some 8s today:

[JC evo1]

pretty impressive for a 3076, especially with the 0.6 housing. Did you end up making a custom inlet manifold, i looked thru this thread but didnt see any engine bay pics?

[steve]

Nah mate, still using the standard (Aussie VR4) inlet plenum. There's one waiting at Mick's to go on the car, but we never get around to putting it on.

[steve]

Bump from the dead.

A few updates, but nothing very exciting. I (finally) received the rebuild kit for my OS giken clutch. It's been an awesome clutch, but I'd be hard pressed to recommend it to anyone considering it's took almost two months to get a new set of plates for it.

I picked up the ohlins that Dan had for sale and installed them a few months ago. They've been great; the spring rates (7.5/5) are pretty good, and the dampening is superb.



I bought a rear clutch pack LSD and had it rebuilt with GSR ratios, but that's sitting on the garage floor waiting for motivation to install it.

Over the last week I've been cleaning out the nightmare (!) that is the wiring in the engine bay. It's a total joke, and is looking like there's a good few weeks of work there for me. I'll be relocating the battery to the boot at the same time (picking up the parts to do most of that today) and making a new loom for the E8 from scratch.

Can anyone tell me just how modular the standard looms through out the engine bay are? Or better yet, is there a diagram some where that will tell me what circuits are in each loom? I'm getting to the point where I want to rip the current one out (it's completely butchered) and start from scratch, only keeping the circuits I need.

Because the battery is going to the boot, I'm going to relocate the surge tank outside under the car on the drivers side. Two reasons; I don't like the idea of the having the battery and surge tank in the same compartment, and I'm getting sick of constantly smelling petrol inside the car.

I'll just slog away at it slowly for now, I've 'misplaced' my license for a few months, so I've got plenty of time to do it.

Edited by steve, 17 November 2008 - 01:23 AM.

[OFFON-4]

Awesome stuff Steve.....Thought we had lost you but good to see its slowly coming back together

Look ut 10z hehehe

[Dean]

I've 'misplaced' my license for a few months, so I've got plenty of time to do it.

i know that feeling champ.
great excuse to keep the mods rolling on it.
ohlins look great
keep us updated.

[JAP63]

Mate full wraps on your car, look awesome, one of the best examples ive seen yet, the ohlins should be good, theyre one of the better if not the best suspension options available, should near throw you out of your seat when cornering if set up properly...

Love your last run at wsid against the silver VY SS, can hear the compressor spool from the crowd! awesome..

Is the 0.82 just to large for the engine, or does it need to breath better on the inlet side to get the most from it? was suprised to see it didnt make more top end power. Next time you go to the strip, get someone to snap a pic of your car from behind as your launching!

Good work mate.

Edited by JAP63, 25 November 2008 - 12:38 PM.

[steve]

Let's try again lol

There was definitely more top end with the 0.82. It made another 10hp atw on 3 psi less than the 0.63 when we dug up a 4th gear run, and the tune with the 0.82 was a fair bit less aggressive than what is in it now. Had we put 25 psi into the 0.82 with the same sort of tune, it probably would've gone upwards of 450hp atw.

I guess I don't think one is better than the other really - it depends on your final goal. My goal was never outright power; I only ever wanted 125mph with as much mid-range as I could muster in street trim. At the time I bought the turbo, it was hard to find other people's results (besides out of the states, which I don't believe are comparable to what we do over here). I was pretty confident that the compressor would reach my goals, but unsure on the smaller rear housing, so went for the 0.82 as a safety buffer, not believing that the 0.63 would be able to handle 25psi which is what I calculated it'd need to go 500 engine hp. Had I known what I do now, I'd have gone the 0.63 from the start.

Here's a pic of it launching the same day the vids were taken. Excuse the smoke, that's from bouncing off the limiter. You've gotta love the shitty IRS design in these winding that much neg on under squat .. almost as bad as a 1600 lol.

Edited by steve, 25 November 2008 - 11:02 PM.

[JAP63]

Hahah, thats what i was after, the datsun 1600 squat..ha, looks tough, I like the fact that every thing youve done so far has been in street trim.
So them runs are with the .63 and 426 Hp then?
Do you think the .82 would bump your trap speed up? if so, i wonder if the ET would be any lower?

interseting when you play around with setups...I agree, the car is likely more driveable and more fun with the 0.63, you start getting to that outright 'drag' type setup eventually and its no fun, especially if you go around hills on the weekend.

I was pretty confident that the compressor would reach my goals, but unsure on the smaller rear housing, so went for the 0.82 as a safety buffer, not believing that the 0.63 would be able to handle 25psi

Youre saying you thought the .63 would 'choke' with the delivery from the compressor? interesting that it didnt,Did you dig up compressor flow charts when looking at all this?

Had we put 25 psi into the 0.82 with the same sort of tune, it probably would've gone upwards of 450hp atw.

Does that mean theres still plenty left in the compressor wheel then?, perhaps try more boost with the .63 or would you then have to swap to the bigger turbine housing?

Edited by JAP63, 26 November 2008 - 01:35 AM.

[steve]

Yeah mate, it's only ever had pump fuel in it. It trapped 128 mph with the 0.82, and 125 mph with the 0.63 (though both times, best ET of 11.5 lol) .. the top end is the least of my worries getting it down the track; it's the 0-330 that's slow. With 300hp atw, I could run consistent 1.6s to the 60' .. with 400+, they're all in the 1.8s haha

It wasn't the compressor I though would be choked by the smaller housing, more the engine itself. I thought the extra restriction would end up sending EGT up and causing more exhaust reversion, so less timing and boost. I've had bad experiences with poorly matched turbine housings in the past, so wanted to try and avoid that again.

I honestly couldn't tell you how much compressor is left. Garrett rate them at ~525hp, and so I always figured I was getting close to it's limit, but recently we've seen one supply enough air to go ~470hp atw on a 2.3L GSR. On the other hand, a mate's 180sx made pretty much the same power (~430hp atw) on 25 psi as it did on 22psi, suggesting it might be out of flow.

I'm not really game to run much more than 25psi on pump, so I don't think I'll go winding any more boost into her

[JAP63]

It wasn't the compressor I though would be choked by the smaller housing, more the engine itself. I thought the extra restriction would end up sending EGT up and causing more exhaust reversion, so less timing and boost.

I didnt realise you were on pump fuel, thats pretty friggin impressive figures then....I remeber reading cases in the states of pinging and all sorts off dramas on 63's when the egt's went thru the roof on their TD05's, i think they were talking around 950-1000 deg farenheit and they were running into issues.

supply enough air to go ~470hp atw on a 2.3L GSR. On the other hand, a mate's 180sx made pretty much the same power (~430hp atw) on 25 psi as it did on 22psi, suggesting it might be out of flow.

Interesting, sounds a bit like a guessing game and whatever works for each individual engine is probably the go, even cylinder head design and chamber size would effect how much gas it would 'let through' so to speak i guess. Did yous happen to log inlet temps on you mates 180 when it made the same power between the 25 and 22 psi runs? I guess if you could see it getting radically hotter thatd indicate its limits

Edited by JAP63, 26 November 2008 - 03:10 AM.

[steve]

So I was screwing around with google sketchup (Great tool for quick 3d modelling btw), and came up with this new surge tank design:



It's to go under the car on the driver's side of the spare wheel well. Now I've just gotta find someone local to make it up for me.

[Evo-00x]

I request an update Steve!!! Had a guy I know get his silver GSR tuned at Micks today and claimed he was making 450hp @ 26psi with the GT3076R.

Edited by EVO-00X, 02 July 2009 - 11:29 AM.

[DOUGMO]

i dont think steve loves us anymore rob

[Evo-00x]

He loves us, he just likes playing hard to get

[OFFON-4]

I like that...You little hard to get bitch hahaha

EARTH TO STEVE!!