Noz

Haha, such a 'fun' day! It was Brands Hatch wasn't it? How's the Zed hunting going? You don't fancy a sweet black Auto TT with 75k on the clock and a manual box in the boot do you?

Depends solely on the mapping programmed onto the chip as to what boost you can run safely.

540bhp if I remember correctly young sir? One of the most complete all round cars I've ever seen. You should have done Time Attack!!

Hello buddy, good to see you on here finally :cool3: You should post a pic of your S14a (if only for me, I loved that car). The one that dominated all but the cheating Westies & Caterhams on the handling course at TOTB all those years ago. All thanks to my amazing suspension set up skills of course... :whistling:

Thought this thread was going to be a depressing tale of car meets curb, glad it's not :D

Wouldn't doubt it for a second :thumbup1:

Hahaha, sound off!! :lol:

I'm pretty sure every Skyline apart from special editions ran turbos with ceramic turbine wheels, including all R32-R34 GTRs & GTSts, RB20, RB25 & RB26. R34 GTRs had ball bearing ceramic-wheeled turbos. I can't remember if all UK R33 GTRs were just V-Specs or others made it over as well. I know they were imported by Middlehurst and modified in various ways. More like a UK-Spec R33 than true UK car IMO. 100% that S-body turbos were all steel. S13 T25 comp was .48, turbine .64 (I've got one here in front of me, piddly little thing). IIRC, S13 T25Gs had a .80 comp housing. S14-S15 T28s had .60 comp & .64 turbine housings.

All S-bodies had steel-wheeled turbos. S13 CA18DET: T25 S13 SR20DET: T25G S14 & S14a: T28 S15: T28 BB The only Nissans that rocked ceramics were Skylines (that I can think of right now). The wheels make a bid for freedom at anything approaching 1 bar, typically.

As far as I'm aware, the 300ZX was only ever fitted with two types of turbos: steel-wheeled TB02/TB22 turbine housing A/R .63 on the manuals and steel-wheeled TB02/TB22 turbine housing A/R .54 on the Autos. Here is the compressor map for the stock 300ZX Garrett turbochargers: According to Garrett themselves: maximum boost occurs at a pressure ratio, P2C/P1C = 2.75. (2.75-1) x 14.7 = 25.725 psi or 1.75 bar With the number-crunching already done, (I'll assume it's correct): This backs up everything posted in this thread with regards to running 21 psi. At 7k RPM, the turbos will be flowing around 1 bar as was observed Airflow = BHP*AFR*BSFC/60. For 400bhp you need approximately 44lb/min airflow, with an assumed BSFC of 0.55 at all engine RPM & AFR of 12:1. I hit near enough that (394.4bhp) at 5800 RPM. Looking at the graph, this corresponds roughly to 1.2 bar and 23lb/min (46lb/min in twin turbo configuration). So there you have it. Empirical data & theoretical data working in unison. There should not be any doubts left as to whether or not you can run 21 psi on stock turbos if you wish to. No reason why it can't be perfectly relaible as long as the mapping is spot on, bearing in mind the increased wear on the turbochargers themselves. Stating that above xx psi the turbos "just blow hot air" isn't very accurate either. If I hadn't observed the above for myself, I probably would have searched out the compressor map first.... Running maximum boost pressure of 1.7 bar for the mid range would probably see you with 450lbft around 4400 RPM. Assuming max BHP is attained

Already got the badge mate!

I'll be at every round bar possibly Lydden Hill round 1. Walking around looking all important with a laptop :xxx: I am actually supposed to be spannering, too. I'm calling myself a Technical Director :lol:

I test drove the 2.0 4WS 150bhp model years ago, had about 120k on the clock but was absolutely immaculate. Drove like it was brand new, lovely car.

Glad to see it made it up your drive in one piece :clap:

Hello! Just up the road from me :biggrin:

SE Nissan!! Now there's a blast from the past. Think Mr Rosenberg was working at GBH Motorsport last time I read about SE.

Prices will be staying the same as last year: https://www.facebook.com/groups/tenofthebest/10151439926648833/?ref=notif&notif_t=group_activity Dave Naxton is offering a special group purchase price, and has this to say: I believe Bobgenie is looking to compete again. I doubt very much my Zed will be as quick over the 1/4 as my MR2, but it's a highly-strung beast so it may pop at an inopportune moment. I didn't enter last year as part of a club (I was running the only Pulsar there!), and I haven't heard anything about an IMOC presence there this year, so I'll be more than glad to help with any organising if required :) For those that haven't been before, it's a great day out! Even better if you come for the weekend.... Plus, those without a £100k to plough into their motors need all hands on deck when the inevitable happens :laugh:

I'm game! Still got my bronze medal form an SXOC karting/dyno meet up in the North West somewhere! There is often a Groupon offer for the track in Loughborough.

Save The Whale!! Great news :clap:

'Overdrive' is simply any gear with a ratio less than 1:1, i.e. where the driveshafts rotate at a higher speed than the engine. Edit: Beaten to it :D

It does sound similar to the SXOC Weekender, just without the hillclimbing!

It has a tendency to go into overdrive around town when it's not always required. It's a good thing though, just another element of control. Who needs a manual?! :lol:

This sounds brilliant. I can't attend unfortunately as it's Japshow that weekend and I'll be hooning up the strip at Pod.

REO: vacant: Events and meetings in the Devon & Cornwall!! Step up wow300 :biggrin:

I'm really busy for the rest of this week, but if you want to email me the file I will try and have a look at some point, assuming this is OK with John Dixon, not sure how much time he's got at the mo. You can post whatever screen shots you like, you own the car so nothing is confidential in that respect. With regards to the fuel/timing maps, it's a slightly more grey area as it's the work of the tuner. Although you own the fuel & timing maps, from a mapper's point of view, it would be nice to be asked first. If it was a stock system, then they could be copied, but as it's an aftermarket EMS, it shouldn't really be an issue. Is there nowhere you can take it near you?