Search found 11 matches

by crice
Tue Nov 17, 2020 4:53 pm
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

MReilly, I think I had wrongly assumed that the closed loop element of this strategy only targeted capsule pressure but I'm not experienced enough with Syvecs to easily interrogate how the normal closed loop turbo speed or MAP & PRP strategies tie in to capsule pressure in the provided example. ...
by crice
Tue Nov 17, 2020 12:54 pm
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

Yeah, totally get what you're saying but it's a hard one to get your head around as with both NO ports blocked, the only way it can vent is through the empty solenoid and obviously a solenoid cannot regulate pressure without flow.
by crice
Tue Nov 17, 2020 12:31 pm
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

Yeah, understand you wouldn't use phase antiphase with CO2. I'd never use CO2 anyway, I'd use a compressor and/or accumulator. As I understand the fill empty valves still have to have a linear phase and antiphase? For me, if I was using it with normal boosted air, normal "Phase" would be t...
by crice
Tue Nov 17, 2020 11:39 am
Forum: Technical Deposit
Topic: Syvecs Boost Solenoid Plumbing Info
Replies: 23
Views: 104519

Re: Syvecs Boost Solenoid Plumbing Info

Did you run the MAC valve at the same frequency?
Cheers.
by crice
Tue Nov 17, 2020 11:34 am
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

How it helps is the antiphase with increasing MAP can have a run away boost effect for the same level of duty so the control is not as accurate, especially on cars where TIP or more correctly MAP/TIP is not increasing in linear fashion with RPM after MAP peaks (stays flat for example). So the idea ...
by crice
Mon Nov 16, 2020 11:04 pm
Forum: Technical Deposit
Topic: Syvecs Boost Solenoid Plumbing Info
Replies: 23
Views: 104519

Re: Syvecs Boost Solenoid Plumbing Info

Hi, when operating a Pierburg at the recommended 35Hz what's the max/min usable duty (i.e. what's the dead zone top and bottom)?
Thanks.
by crice
Mon Nov 16, 2020 12:12 pm
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

Hi Stevie, it's not only drag racing, rallying too. It could be useful anywhere you need a big range of boost pressures, very accurate control and to overcome high EMAP. Only targeting dome pressure to me is a waste of time, it's essentially a glorified open loop strategy at that point. If the base ...
by crice
Mon Nov 16, 2020 10:07 am
Forum: General Syvecs Chat
Topic: Co2 Boost control
Replies: 15
Views: 18837

Re: Co2 Boost control

Ryan, is this just closed loop control of a capsule pressure target or does the PI control of capsule pressure work in addition to the primary (or primary and secondary in the case of dual MAP & PRP) closed loop boost control targeting MAP, turbo speed or PRP? I have a rough idea how it works on...
by crice
Mon Sep 23, 2019 4:55 pm
Forum: S6 GP/PnP Technical
Topic: I/C Water Spray
Replies: 2
Views: 14229

I/C Water Spray

On an S6GP fitted to a Subaru, I can't see any maps/tables for automatic intercooler water spray. Should I control this using the water injection options (if so, what if you have both)? There is an auto switch in the car, I guess this needs wiring as an input and the pump as the output but what inpu...
by crice
Thu Jul 26, 2018 9:49 am
Forum: Dyno Talk
Topic: Dyno question
Replies: 0
Views: 60769

Dyno question

If you're using a 'snapshot' type feature on the dyno to correlate engine speed with roller speed (i.e. hold the engine at say 4000rpm in your chosen gear and press a button to tell the dyno software you're at 4000rpm) rather than use and inductive clamp, injector signal, OBD or whatever to feed an ...