ChrisB

You are doing fine

Epic struggle Your Zed is looking rather decimated now though

Gid'day mate

Or this.. ..I feel mean now

Eh? PMs and posts in parallel - slow down - I'm on an iPad Just to clarify - Adrian's second hand S2 is for a 370 if anyone wants to buy it (thats what he was joking about with "it won't work" )

Eh? PMs and posts in parallel - slow down - I'm on an iPad

Good old Charles Stage 2 from your car.. vulture mode on.. ..really?

After a fair bit of reading, I'm pretty sure that this stock rail limitation is, well, normal My logging is showing both a kind of fluid hammer (high frequency spikes in the fuel curve.. [curve - ha! call that a curve?]) as well as showing the drop in pressure trend over a longer load period. In other tests, if I back off a touch or change gear before getting back on it, I have seen the pressure restoring and AFR sustaining 11's as the fuel system catches up. There is only 1 remaining damper in my system too - lack of damping would lead to the fluid hammer or jolts in pressure as injector duty cycle goes up.. CJ V3 rails return the damping by placing dampers in the middle of the rails. Flow issues are fixed by increasing volumetric capacities everywhere, and changing the rail supply configuration.. No brainer really - to smooth all this out, fuel system 2.0 is required. Only loss I suppose was the partial cost of an AAM basic - so that's eaten into the group buy savings of the S/C back then.. but still winning as some bits left over are reused by deselecting options on the CJ.. Normally people don't fit logging pressure gauges, so are none the wiser - their cars do what they do. Here, also, I can measure and chart the effect of upgrades Better, more consistent, fuel supply should mean less potential danger to the engine when it's in it's over stretched FI boosted (all be it occasional) operation. Soo... no brainer then, buy a new upgrade kit.. except.. will it be CJ stage 1 with V3 rails, or CJ stage 2 (with V3). The difference between S1 and S2 is only about $170 and includes a new wider bore tank to bay fuel hard pipe. That sounds like it could be a right PITA to fit on axle stands Hmmm.. ...shopping.... ....ADRIAN!!!.... I need some Torquen/CJ love!!!

Luckily she's not noticed that there are blank lines between the jobs on that page

Stay away from Audis driven by prats too (IIRC)

that is a lot of no-go pros

As in NO FRS Technically they are semi-correct - car works fine with stock rails and basic FRS - but it's starting to look a bit ugly. Worth spending a few more quid I think Is there a fuel return on this AAM basic

As in NO FRS Technically they are semi-correct - car works fine with stock rails and basic FRS - but it's starting to look a bit ugly. Worth spending a few more quid I think

DIY FI - got to attempt a bit of science occasionally I found a pdf which said JWT suggest you can bore the stock fuel rails out to remove the restriction at the inlet. I think new rails would be better though. More dosh

Nerd-tastic update (not sure if I'm really boring people now ) I think a fuel system 2.0 upgrade might be in order, as I've made an observation. It's probably not surprising that there are staged fuel system packages on the market. Sales blurb can be OTT at times, but I'm starting to think that there is something in it regarding fuel rails etc. My car runs fine - and if I hadn't designed and built all this logging - I'd probably be none the wiser.. however.. here's a couple of graphs of todays 40min commute in. In it there is a WOT.. Black is fuel pressure (psi), green is manifold air pressure (psi), magenta is average AFR. Note the black spike towards the end at ~2200 secs (scale is in ms). That corresponds with a WOT blast.. AFR over the whole trip between both banks (twin AFR sensors) shows reasonable balance - slightly richer in bank 2 (but I think that is deliberate tuning). Ignore upper right - thats AFR maxing out slightly out of sequence when coasting (fuel shut-off). I've coded my logger to go into high rate sampling if an interesting event occurs - in this case MAP > atmospheric, so I can get better resolution on exciting WOTs (about 40Hz) This detail zoomed in gives slightly worrying show of pressure drop. Of course, as the ID725 injectors open their taps, that will drain the fuel rails of petrol and lower its pressure - but, is this a case of the fuel system maxing out as pressure doesn't seem to be adequately replenished? It's down to 30psi at the end of the fuel rail chain by the end of the blast AFR is acceptable - but you can see it creeping up towards the end of the run - it hits about 12 - engine was over 5k RPM by then (I haven't got RPM sensing yet BTW). MAP is a good proxy for load though. Looking at this in another way, there is quite a fuel pressure avalanche in boost - like the system has been sucked dry Assuming the GSS342 Walbro pump is creating fuel delivery sufficiently down the stock fuel line (there is that funky carbon filter thing in the way in the OEM fuel bucket), and that the Aeromotive is pinching off return properly in boost, maybe parallel fed, fat fuel rails are the way forward like it says in the sales blurb after all

Mishi Hoses - Dibs! Edit: Flap flap ...swoooooppp like a ninja-vulture..

^^ drool...

Snap..

I was lurking on this. Doesn't surprise me that you found that you'd split it, as I had knackered one or two exactly the same in the past when attempting to reuse. O rings - best changed for fresh ones if you need to refit something (and those multiboxes are great value for money) Oiling them with fresh engine oil makes installation easier and reduces the risk of damage from scuffing. It also moisturises the seal for protection too (allegedly).

I wouldn't worry too much about gearbox/SMF chatter - it's a bit uncouth and rough in slow traffic or parking but in normal or fun driving, there is no extra noise from the transmission. Solution, drive fast always

This one? http://www.350z-uk.c...dmf-comparison/

We love it Loads of different graphs* automatically plotted now.. nerd-tactic - just need to add the extra IAT and coolant port hardware. I've reviewed, extended and tweaked some sensor coefficients too. Splendid. * ie.. afr bank 1 ~ afr bank 2 oil ~ coolant (including 64 pt rolling average) fuel ~ MAP iat ~ MAP MAP ~ av.afr everything ~ time

^^ What he said with bells on !