 Exciting AccessPORT news: RPM based boost control working |
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| Exciting AccessPORT news: RPM based boost control working |
 Sep 11 2009, 07:07 AM
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#1
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 R33 Member  Group: Euro Vendor Posts: 797 Joined: 24-January 08 Member No.: 12,792  |
Very exciting to let you guys know, this morning the first trial on a R35 using just an accessPORT successfully saw real controlled boost via the ecu, RPM based boost control. No boost controller in sight.
For the last month or so, to help take the work load away from the Cobb GT-R team (Trey, JoeGR, Turtle), GTC main tech man Thistle had been busy with the raw GT-R rom files. The wastegate duty table axis now uses RPM instead of airlow, which was the reason behind the boost spikes. This now allows proper independent control of overboost situations by rpm. Now wastegate duty follows the map by RPM. More testing to be done, but an otherwise standard car with significant traction problems in the dry, although this was on the initial map which gave 20 PSI midrange and 17 PSI at 6000 RPM and will be detuned in the midrange as the car is otherwise stock. The important point is that now we can detune the midrange and keep the high RPM boost up Next up Knock in datalogs  If you thought the AP was good, its about to go to next level thanks to the tireless efforts of the team who never stop striving to improve. All being well GTC will shortly be offering custom tunes with the new features included. I have told a number of people to hold off buying custom tunes from us until this was implented and we were happy, and also to save boost controller $$$ -------------------- GTC
team@gtc-r.com Nissan R35 GT-R SUPER STORE PERFORMANCE EXHAUST UPGRADES * ECU REMAPS - AccessTUNER GT-R Protuner * DIAGNOSTICS * BRAKE TECHNOLOGY * SUSPENSION TECHNOLOGY * OEM GEAR BOX / ECU SOFTWARE UPDATES * AERO DYNAMIC PARTS * JDM ALLOY WHEELS & TIRES * IMPORT & TECHNICAL ADVISE + MORE….. Tel: +44 1438 833367 Fax: +44 1438833590 Mob: +447970646620  |
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Sep 11 2009, 07:35 AM
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#2
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 Caretaker of GODZIRA! Group: Members Posts: 1,740 Joined: 14-April 08 From: NE Indiana/SE Florida Member No.: 13,282 |
That's fantastic news Ben! That's a real breakthrough!
Jack @Boost Logic had to retune, and (imo), significantly detune mine, to combat those damn dreaded boost spikes. Is this something all Cobb Pro tuners will have available to them (ie, us Yanks)? -------------------- 09 GT-R~Ti/Blk
HP Logic dyno tuned~555whp Willall Tranny/Diff Fluids Forge Actuators Greddy Intercoolers, Deatschworks 800cc Injectors SSP Catless Downpipes HKS Resonated Midpipe 5Zigen "SP Tune" Catback AP Racing J-Hook Rotors Hawk DTC-70/60 Pads Stillen SS Brake Lines Cobb Swaybars Toyo R888s 06 M5~Indy Red/Blk 33k mi, Dinan 3:91 Diff, Supersprint Catback (FOR SALE, PM me) |
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Sep 11 2009, 07:37 AM
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#3
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 Thread Derailer Group: Members Posts: 1,848 Joined: 6-April 09 From: Abu Dhabi, UAE Member No.: 17,874 |
Congrats and keep up the good work.......plz no gtr tax!!!
-------------------- Nissan GT-R 09 -- sold
Toyota Prado Lexus IS 350 Mercedes S 500 Hayabusa 09  |
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Sep 11 2009, 07:44 AM
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#4
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R33 Member Group: Euro Vendor Posts: 797 Joined: 24-January 08 Member No.: 12,792 |
QUOTE (Goodwood @ Sep 11 2009, 08:35 AM)  That's fantastic news Ben! That's a real breakthrough! Jack @Boost Logic had to retune, and (imo), significantly detune mine, to combat those damn dreaded boost spikes. Is this something all Cobb Pro tuners will have available to them (ie, us Yanks)? ye big breakthrough which was started and finished pretty quickly we all hate those dam spikes in Nissans system. So lucky no one did an engine in the early days.Yup will be available though all protuners, who will soon have access to accesstuner pro 2.0 after tests. -------------------- GTC
team@gtc-r.com Nissan R35 GT-R SUPER STORE PERFORMANCE EXHAUST UPGRADES * ECU REMAPS - AccessTUNER GT-R Protuner * DIAGNOSTICS * BRAKE TECHNOLOGY * SUSPENSION TECHNOLOGY * OEM GEAR BOX / ECU SOFTWARE UPDATES * AERO DYNAMIC PARTS * JDM ALLOY WHEELS & TIRES * IMPORT & TECHNICAL ADVISE + MORE….. Tel: +44 1438 833367 Fax: +44 1438833590 Mob: +447970646620 |
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Sep 11 2009, 07:49 AM
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#5
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Caretaker of GODZIRA! Group: Members Posts: 1,740 Joined: 14-April 08 From: NE Indiana/SE Florida Member No.: 13,282 |
Effing awesome Ben, thanks! Looks like a retune will be in order!
-------------------- 09 GT-R~Ti/Blk
HP Logic dyno tuned~555whp Willall Tranny/Diff Fluids Forge Actuators Greddy Intercoolers, Deatschworks 800cc Injectors SSP Catless Downpipes HKS Resonated Midpipe 5Zigen "SP Tune" Catback AP Racing J-Hook Rotors Hawk DTC-70/60 Pads Stillen SS Brake Lines Cobb Swaybars Toyo R888s 06 M5~Indy Red/Blk 33k mi, Dinan 3:91 Diff, Supersprint Catback (FOR SALE, PM me) |
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Sep 11 2009, 08:15 AM
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#6
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 R33 Member Group: Members Posts: 821 Joined: 11-October 08 From: Czech Rep. Member No.: 14,474 |
Maps from last week has this new feature? Yes I mean mine map :-)
-------------------- 2009 GT-R USDM
Cobb AP with GTC custom map GTC Titan exhaust, Y-pipe and catback AP rotors + Stillen brake lines Carbotech X12 pads BMC air filters JRZ RS Pro Silent edition suspension Stillen sway bars Aeromotions R2.Two Wing Toyo R888 |
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Sep 11 2009, 08:32 AM
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#7
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 R32 Member Group: Members Posts: 112 Joined: 28-August 09 Member No.: 26,072 |
So does this mean no boost controllers needed...... :-)
This post has been edited by TheBOSS: Sep 11 2009, 08:32 AM |
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Sep 11 2009, 08:58 AM
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#8
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 R32 Member Group: Vendors Posts: 400 Joined: 27-August 08 From: Wellington, FL Member No.: 13,998 |
VERY NICE!!!.....and its Jack@HorsepowerLogic ....not Boost Logic...LOL....but yes....this will help a TON!....
-Jack -------------------- |
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Sep 11 2009, 10:36 AM
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#9
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 R34 Member Group: Members Posts: 1,513 Joined: 27-November 08 From: oregon Member No.: 14,947 |
Sweet, now I can go to Surgeline tuning and we can re-dyno tune my car. Tim from Surgeline (Cobb affiliate), told me an engineer in Europe was working on it for Cobb. Didn't know it was thistle for sure but I was wondering. Great job thistle!!!!
-------------------- '09 GT-R titanium: Cobb AP custom tuned by Tim Bailey @ Cobb/Surgelne, AMS non-catted DP's, Cobb catted midpipe, T1R catback, AMS FMIC, Injector Dynamics 1000cc injectors, GoFastBits BOV's, Walbro 255 fuel pumps, Custom intake system built by gotboost, T1R spring kit, Stillen sway bars, H&R Hubcentric wheel spacers, OZ Racing Botticelli III's w/ Dunlop SP 600's, R888's on OEM for track, Willall WR35TM, Synergy Autoworks rear carbon fiber spoiler and front cf grill, Titek cf antenna cover, Southern Car Parts cf mirror covers......562WHP/560WTQ Mustang @ 17psi peak on 92 octane.........E85 Dyno results to come soon...
'95 Porsche 993 supercharged & intercooled '08 Acura MDX Sport '05 GMC Sierra crew 4x4 modded Diesel '10 Hotrails sandrail w/Acura 3.5 turbo and intercooled (550 hp, 1800lb. E-Ticket ride) www.hotrailssandcars.com 997 GT-3RS will be the next stable mate  |
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Sep 11 2009, 10:49 AM
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#10
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R32 Member Group: Members Posts: 419 Joined: 20-June 09 From: NJ Member No.: 21,918 |
Wow, that's great to hear. still havent gotten one because i havent broken the car in and have to make sure my mechanic wont be sticking it to me if i have it on the car. Glad I waited so far.
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Sep 11 2009, 11:31 AM
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#11
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Caretaker of GODZIRA! Group: Members Posts: 1,740 Joined: 14-April 08 From: NE Indiana/SE Florida Member No.: 13,282 |
QUOTE (BoostCrzy @ Sep 11 2009, 10:58 AM) VERY NICE!!!.....and its Jack@HorsepowerLogic ....not Boost Logic...LOL....but yes....this will help a TON!.... -Jack OOPS, my bad! At least I got your name right and the LAST part of the biz name. Sorry, I'll correct that in my contacts and sig! This post has been edited by Goodwood: Sep 11 2009, 11:43 AM -------------------- 09 GT-R~Ti/Blk
HP Logic dyno tuned~555whp Willall Tranny/Diff Fluids Forge Actuators Greddy Intercoolers, Deatschworks 800cc Injectors SSP Catless Downpipes HKS Resonated Midpipe 5Zigen "SP Tune" Catback AP Racing J-Hook Rotors Hawk DTC-70/60 Pads Stillen SS Brake Lines Cobb Swaybars Toyo R888s 06 M5~Indy Red/Blk 33k mi, Dinan 3:91 Diff, Supersprint Catback (FOR SALE, PM me) |
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Sep 11 2009, 11:38 AM
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#12
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 R35 Member Group: Members Posts: 2,041 Joined: 10-July 09 From: San Diego, CA Member No.: 22,976 |
Fantastic! I just ordered a boost controller, too. I'll hold off on the install until this becomes more mainstream. Thanks for the dedicated work on this.
-------------------- 2009 Obsidian Black Nissan GT-R Premium: 540 awhp, 560 awtq.
Cal Speedway 1:53.401, Willow Springs (big Willow) 1:34.457, Buttonwillow 13cw 2:02.858. HB large MAF intakes, AMS FMIC, Harmon Motive intercooler piping, iD 1000cc injectors, Walbro fuel pumps, HKS plugs, AAM catted downpipes, Titek resonated Y-pipe, HKS Legamax exhaust, and Cobb AP with HB Speed tune. AP Racing J-hook rotors, Carbotech XP10 pads, Stillen stainless brakelines, Motul RBF600 fluid, Stillen sway bars. Willall Victory Spec tranny fluid. Willall diff fluid. Motul 300v 15w50 engine oil. |
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Sep 11 2009, 11:39 AM
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#13
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SpecV Member Group: Members Posts: 5,838 Joined: 7-November 07 Member No.: 12,312 |
im not a tuner so i dunno this ecu stuff, but wanted to ask some questions, sorry if they look uneducated, i know only a little, and i have only done a greddy emanagement setup on an older car along time ago on a non supported ecu.
did the limitation on air come from the 23psi limit from the maf, hence this being a work around?? if that limitation was removed would it work by airflow and not need RPM based? if thats all not a bother what about that 23psi limit? what will this rpm based ecu gain from removing that limitation? -------------------- Disclaimer : I am an internet mechanic and my posts are opinions unless otherwise backed up by links or what not. I have a passion for automobiles and the r35, and am learning and helping with whatever information I have found in its raw form tho it may be lost in translation so please use common sense and take help with a grain of salt. I don't own an r35 yet also.
Maxima SE 300zx TT Honda Si  |
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Sep 11 2009, 11:57 AM
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#14
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 R33 Member Group: Euro Vendor Posts: 787 Joined: 20-June 09 From: UK Member No.: 21,909 |
This is unrelated to boost pressure or airflow limits.
This is a method to accurately control the wastegate to get your desired boost curve without spiking. On a completely standard car I have 17.5 PSI at 5500 RPM tapering to 14.5 PSI at 7000 RPM. This is usually actuators/EBC territory. I have done only two flashes on the new system, will do a third to fine tune and then collect/post some nice logs I hope. -------------------- |
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Sep 11 2009, 11:57 AM
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#15
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R33 Member Group: Euro Vendor Posts: 797 Joined: 24-January 08 Member No.: 12,792 |
Loads graphs and data to follow to prove it does what it says on tin, inc full throttle gear changes
V2 map holding 1 bar at 7,000rpm. totally stock car -------------------- GTC
team@gtc-r.com Nissan R35 GT-R SUPER STORE PERFORMANCE EXHAUST UPGRADES * ECU REMAPS - AccessTUNER GT-R Protuner * DIAGNOSTICS * BRAKE TECHNOLOGY * SUSPENSION TECHNOLOGY * OEM GEAR BOX / ECU SOFTWARE UPDATES * AERO DYNAMIC PARTS * JDM ALLOY WHEELS & TIRES * IMPORT & TECHNICAL ADVISE + MORE….. Tel: +44 1438 833367 Fax: +44 1438833590 Mob: +447970646620 |
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Sep 11 2009, 12:38 PM
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#16
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R32 Member Group: Members Posts: 248 Joined: 30-December 08 From: Tampa, Florida Member No.: 15,187 |
Does this do anything for HP gains? If so I need to have my car retuned by Sharif.
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Sep 11 2009, 12:53 PM
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#17
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 GTR FTW Group: Members Posts: 2,599 Joined: 10-January 08 From: New York Member No.: 12,709 |
QUOTE (Ben Linney GTC @ Sep 11 2009, 01:57 PM) Loads graphs and data to follow to prove it does what it says on tin, inc full throttle gear changes V2 map holding 1 bar at 7,000rpm. totally stock car What did the same car hold before? and how much more power is this on the dyno? |
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Sep 11 2009, 01:25 PM
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#18
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R33 Member Group: Euro Vendor Posts: 787 Joined: 20-June 09 From: UK Member No.: 21,909 |
Not dyno'd, just tested on my commute
Previously about 0.2 bar less at the top end, limited further by spiking on flat foot short shift or 1-2/2-3 redline changes. It is certainly consuming more air and fuel, so it is hopefully likely to add power. This post has been edited by thistle: Sep 11 2009, 01:26 PM -------------------- |
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Sep 11 2009, 01:46 PM
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#19
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R32 Member Group: Members Posts: 360 Joined: 28-April 08 From: Toronto Member No.: 13,335 |
Um, can someone please explain what this all means in layman's terms for the mechanically challenged amongst us?
-------------------- 2009 Black/Black Canadian Spec.
Advan F7's Blizzaks for winter T1R Mid-pipe AAM Competition Downpipes HKS Legamax Exhaust HKS Superfire Spark Plugs AMS Z Store Pulley Custom Cobb Tune from AAM Carbotech Pads Clear Bra iPod Rear View Camera Boomerang |
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Sep 11 2009, 02:10 PM
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#20
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 R35 Member Group: Vendors Posts: 2,016 Joined: 4-October 08 From: Australia Member No.: 14,369 |
QUOTE (en543pm @ Sep 11 2009, 01:46 PM) Um, can someone please explain what this all means in layman's terms for the mechanically challenged amongst us? Easy.... More power at the top end, without the boost spike on full throttle upshifts in the middle. No more $$$ for boost controllers and actuators as now a tune can deliver the same result What Thistle needs to do now is get a version to Australia for testing - as after all Bart Simpson showed us that toilets flush the other way down under - lets hope the boost control isnt inverse. In other words I really need to test it on our car (can also supply boost error/target dyno graphing)
-------------------- Willall Racing
www.willallracing.com.au |
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