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<blockquote data-quote="pollyp" data-source="post: 724666" data-attributes="member: 4527"><p><strong>2015-06-28 Blyton Park Eastern Circuit</strong></p><p></p><p>05:40 Refuelled & set off at</p><p>07:27 near blyton I brimmed the tank at the last BP services, she did 39mpg cruising at 70mph on these 595RSR inflated to 2.0/2.7bar F/R (the T1R inflated to 3bars usually reach 45-47mpg after a cruise)</p><p></p><p>08:00 arrived at an overcast Blyton Park, unloaded the car, rechecked the warm tyre pressures to 2/2.7bar f/r, brimmed the oil thats dropped to 40% on the way down, set dampers 15/30 f/r</p><p></p><p>[ATTACH=full]43256[/ATTACH]</p><p></p><p>checked the catchcan and boy it caught abit <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> looks like 60ml after the 130mile trip down</p><p></p><p>[ATTACH=full]43249[/ATTACH]</p><p></p><p>then just before briefing, the rain came down, k this'll be a wet session on semislicks.</p><p>was looking for Alex and AndyH701 to turn up, guess not tday :/</p><p>appears from the briefing that there's gonna be a mostly novices on track, so morning is gonna be full of traffic.</p><p></p><p>Changes since last time in April we fitted wider rear track, smooth front discs, new front pads, new seats, corner balanced & realigned wheels.</p><p></p><p><strong>09.25 sighting lap --------------------------------------------------------------------------------------------------------------------------------------------------------</strong></p><p></p><p><u>Before:</u></p><p>Setup:</p><p style="margin-left: 20px">Dampers: 15/30 F/R</p> <p style="margin-left: 20px">Tyres: 595RSR 2.0/2.7bar F/R</p> <p style="margin-left: 20px">Weight: 100% fuel, driver only</p><p></p><p>Misc changes:</p><ul> <li data-xf-list-type="ul">seat too high cos helmet hitting sunroof so had to recline back, too close to pedals so had to slide back, must remove sunroof frame eventually.</li> </ul><p></p><p><u> During:</u></p><p>Track Condition: wet</p><p>Brake Bias: 60/40% F/R</p><p></p><p>[MEDIA=youtube]8K3WIfae-nA[/MEDIA]</p><p></p><p>Track Feedback:</p><ul> <li data-xf-list-type="ul">limited low traction</li> <li data-xf-list-type="ul">wheelspin on exit when I hit peak torque at 5k WOT</li> <li data-xf-list-type="ul">front brakes locking up under hard braking</li> <li data-xf-list-type="ul">brake pedal with smooth discs staying firm and 10mm above throttle</li> </ul><p>after heating up the tyres, adjusted their hot pressures from 2.1/2.8 back to 2.0/2.7bars</p><p></p><p><strong>09.45 Run 1 --------------------------------------------------------------------------------------------------------------------------------------------------------</strong></p><p></p><p><u>Before:</u></p><p>Setup:</p><p style="margin-left: 20px">Dampers: 15/30 F/R</p> <p style="margin-left: 20px">Tyres: 595RSR 2.0/2.7bar F/R</p> <p style="margin-left: 20px">Weight: 100% fuel, driver only</p><p></p><p><u> During:</u></p><p>Track Condition: damp drizzle</p><p>Brake Bias: 60/40% F/R</p><p></p><p>Cabin footage was corrupted from the usb power cut.</p><p></p><p>Track Feedback:</p><ul> <li data-xf-list-type="ul">couldn't push the car much cos mostly following slower traffic in the damp</li> <li data-xf-list-type="ul">gear changes at high speed is alot faster now with the JUN flywheel</li> </ul><p></p><p>Track times:</p><p><span style="color: #ff0000">1:47 traffic</span></p><p><span style="color: #ff0000">1:49 traffic</span></p><p><span style="color: #ff0000">1:50 traffic</span></p><p><span style="color: #ff0000">1:43 traffic</span></p><p><span style="color: #ff0000">1:43 traffic</span></p><p><span style="color: #ff0000">1:50 traffic</span></p><p><span style="color: #ff0000">1:43 traffic</span></p><p><span style="color: #ff0000">1:41 traffic</span></p><p></p><p>misc note bout the catch cans. now that the cars mostly under +ve boost on track, the RH can which captures vapour out the crankcase breather when under inlet vacuum is condensing less whereas the LH can that captures vapour out the engine cover breather under boost is condensing more, so it's working <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p><strong></strong></p><p><strong>10:17 Run 2 --------------------------------------------------------------------------------------------------------------------------------------------------------</strong></p><p></p><p>Went out for run #2 but then during the warmup lap on boost I heard a "poof", lost all boost and reduced power, but AFR still reading normal so it ain't leaking boost after the MAF.</p><p>Think ah-ohh what's popped off this time?</p><p>open window to listen for any exhaust blow, nope still normal so the exhaust hasn't blown or the manifold welds hasn't cracked off.</p><p>return to pit and check over where it's losing boost.</p><p></p><p>all the pipes at the top are intact, when I rev it high the BOV usually creates some hiss but this time it doesn't hiss at all so there's zero boost?</p><p>removed BOV and can see the valve is working.</p><p>intercooler is intact and most of the induction pipes still on tight.</p><p>if it's not creating any boost, could the turbine/comp be seized? removed the inlet pipe and spin the wheel, yup it's still lubed and spinning freely so the turbo is fine.</p><p></p><p>but then spotted down below in the shadows that the boost pipe on the turbo compressor outlet has popped off, that's why it ain't creating any boost and run a normal mixture.</p><p></p><p>[ATTACH=full]43257[/ATTACH]</p><p></p><p>removed the pipe and urm yeh this boost pipe is the next weak spot to strengthen. there's no bead lip on the ends and that rubber coupler that attaches the small 90deg very tight elbow to the turbo outlet is having a hard time holding on. reattached it</p><p></p><p><strong>11:24 Run 3 --------------------------------------------------------------------------------------------------------------------------------------------------------</strong></p><p></p><p><u>Before:</u></p><p>Setup:</p><p style="margin-left: 20px">Dampers: 15/30 F/R</p> <p style="margin-left: 20px">Tyres: 595RSR 2.0/2.7bar F/R</p> <p style="margin-left: 20px">Weight: 50% fuel, driver only</p><p></p><p><u> During:</u></p><p>Track Condition: intermediate</p><p>Brake Bias: 50/50% F/R</p><p></p><p>[MEDIA=youtube]IlyEwokvd8k[/MEDIA]</p><p></p><p>Track Feedback:</p><ul> <li data-xf-list-type="ul">tyres & brakes had cooled down during the fix so initially during outlap the cold brakes not as effective and the cold 595RSR were squeeling under medium corner loads so gradually warmed em up slowly.</li> <li data-xf-list-type="ul">once brakes n tyres are back upto hot temps they grip hard.</li> <li data-xf-list-type="ul">brakes no longer lock so moved bias all the way back 50/50 for max braking force</li> <li data-xf-list-type="ul">brakes are now very effective, limited by how hard I can press and can slow down very quickly</li> <li data-xf-list-type="ul">hot brake pedal now stops 5mm above the throttle, so it doesn't sink as much with these smooth discs but seems the fluids still boiling very slightly</li> <li data-xf-list-type="ul">red new seats very lacking in support. had to wedge legs against doorcards. seat base too firm, flat & high, needs more foam cutting out cos I'm submarining/slouching forwards</li> <li data-xf-list-type="ul">slight highspeed understeer exiting Bunga bunga</li> </ul><p></p><p>Track Times:</p><p><span style="color: #ff0000">1.30 traffic</span></p><p><span style="color: #ff0000">1.30 traffic</span></p><p><span style="color: #ff0000">1.32 traffic</span></p><p><span style="color: #ff0000">1.28 traffic</span></p><p><span style="color: #ff0000">1.32 traffic</span></p><p><span style="color: #ff0000">1.27 traffic</span></p><p><span style="color: #ff0000">1.39 traffic</span></p><p><span style="color: #ff0000">1.31 traffic</span></p><p>1.24s</p><p><span style="color: #ff0000">1.34 traffic</span></p><p><span style="color: #ff0000">1.30 traffic</span></p><p></p><p><strong>12.15 Run 4 --------------------------------------------------------------------------------------------------------------------------------------------------------</strong></p><p></p><p>Tried reducing front pressure down to 1.9bar and front dampers soften to 10clicks to see if it resolves the highspeed understeer</p><p></p><p><u>Before:</u></p><p>Setup:</p><p style="margin-left: 20px">Dampers: 10/30 F/R</p> <p style="margin-left: 20px">Tyres: 595RSR 1.9/2.7bar F/R</p> <p style="margin-left: 20px">Weight: 25% fuel, driver only</p><p></p><p><u> During:</u></p><p>Track Condition: drying</p><p>Brake Bias: 50/50% F/R</p><p></p><p>The cabin camera now kept corrupting from any power cut (the remote didn't stop the cabin camera before I turned ign off) but still had footage of the suspension & pedals.</p><p></p><p>[MEDIA=youtube]fe9Ds1ItwLI[/MEDIA]</p><p></p><p>Track feedback:</p><ul> <li data-xf-list-type="ul">slightly worse understeer</li> <li data-xf-list-type="ul">look at the unbalanced soft CV boot flapping at high speed! I need to stop that happening before it splits itself apart<br /> </li> <li data-xf-list-type="ul">on lap 4 @6:20 whilst going flat out round the bumpy Curva Grande I lost my footing and braked too late, badly understeered and spun off to the gravel. had the slomo moment of looking at that blue traffic cone that I'm skidding towards and thinking oh sheet I'm gonna go off track & hit that with no control #squint# thank gawd it's not an armco barrier</li> </ul><p></p><p>Track Times:</p><p>1.26</p><p><span style="color: #ff0000">1.29 traffic</span></p><p>1.24</p><p>spun</p><p></p><p>nursed back home with loadsa gravel dropping out of her.</p><p>back at pits the front left tyres abit worse for wear with gravel stones wedged right into the rims.</p><p></p><p>[ATTACH=full]43246[/ATTACH] [ATTACH=full]43247[/ATTACH] [ATTACH=full]43255[/ATTACH]</p><p></p><p>this sidewall mis-shaping from the gravel stones doesn't look safe so since its almost lunch break I head out to try look for any open tyre shops to help deflate & clean the stones out the rims...on a sunday<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite24" alt="o_O" title="Er... what? o_O" loading="lazy" data-shortname="o_O" /> get food & refuel.</p><p></p><p>she did just 17-19mpg on track <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite17" alt=":confused:" title="Confused :confused:" loading="lazy" data-shortname=":confused:" /></p><p></p><p>was abit tricky, kwikfit was very busy but i found some hidden corner tyre place and the top blokes fixed & balanced the front left tyre for free <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite20" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="pollyp, post: 724666, member: 4527"] [B]2015-06-28 Blyton Park Eastern Circuit[/B] 05:40 Refuelled & set off at 07:27 near blyton I brimmed the tank at the last BP services, she did 39mpg cruising at 70mph on these 595RSR inflated to 2.0/2.7bar F/R (the T1R inflated to 3bars usually reach 45-47mpg after a cruise) 08:00 arrived at an overcast Blyton Park, unloaded the car, rechecked the warm tyre pressures to 2/2.7bar f/r, brimmed the oil thats dropped to 40% on the way down, set dampers 15/30 f/r [ATTACH=full]43256[/ATTACH] checked the catchcan and boy it caught abit :) looks like 60ml after the 130mile trip down [ATTACH=full]43249[/ATTACH] then just before briefing, the rain came down, k this'll be a wet session on semislicks. was looking for Alex and AndyH701 to turn up, guess not tday :/ appears from the briefing that there's gonna be a mostly novices on track, so morning is gonna be full of traffic. Changes since last time in April we fitted wider rear track, smooth front discs, new front pads, new seats, corner balanced & realigned wheels. [B]09.25 sighting lap --------------------------------------------------------------------------------------------------------------------------------------------------------[/B] [U]Before:[/U] Setup: [INDENT]Dampers: 15/30 F/R Tyres: 595RSR 2.0/2.7bar F/R Weight: 100% fuel, driver only[/INDENT] Misc changes: [LIST] [*]seat too high cos helmet hitting sunroof so had to recline back, too close to pedals so had to slide back, must remove sunroof frame eventually. [/LIST] [U] During:[/U] Track Condition: wet Brake Bias: 60/40% F/R [MEDIA=youtube]8K3WIfae-nA[/MEDIA] Track Feedback: [LIST] [*]limited low traction [*]wheelspin on exit when I hit peak torque at 5k WOT [*]front brakes locking up under hard braking [*]brake pedal with smooth discs staying firm and 10mm above throttle [/LIST] after heating up the tyres, adjusted their hot pressures from 2.1/2.8 back to 2.0/2.7bars [B]09.45 Run 1 --------------------------------------------------------------------------------------------------------------------------------------------------------[/B] [U]Before:[/U] Setup: [INDENT]Dampers: 15/30 F/R Tyres: 595RSR 2.0/2.7bar F/R Weight: 100% fuel, driver only[/INDENT] [U] During:[/U] Track Condition: damp drizzle Brake Bias: 60/40% F/R Cabin footage was corrupted from the usb power cut. Track Feedback: [LIST] [*]couldn't push the car much cos mostly following slower traffic in the damp [*]gear changes at high speed is alot faster now with the JUN flywheel [/LIST] Track times: [COLOR=#ff0000]1:47 traffic 1:49 traffic 1:50 traffic 1:43 traffic 1:43 traffic 1:50 traffic 1:43 traffic 1:41 traffic[/COLOR] misc note bout the catch cans. now that the cars mostly under +ve boost on track, the RH can which captures vapour out the crankcase breather when under inlet vacuum is condensing less whereas the LH can that captures vapour out the engine cover breather under boost is condensing more, so it's working :) [B] 10:17 Run 2 --------------------------------------------------------------------------------------------------------------------------------------------------------[/B] Went out for run #2 but then during the warmup lap on boost I heard a "poof", lost all boost and reduced power, but AFR still reading normal so it ain't leaking boost after the MAF. Think ah-ohh what's popped off this time? open window to listen for any exhaust blow, nope still normal so the exhaust hasn't blown or the manifold welds hasn't cracked off. return to pit and check over where it's losing boost. all the pipes at the top are intact, when I rev it high the BOV usually creates some hiss but this time it doesn't hiss at all so there's zero boost? removed BOV and can see the valve is working. intercooler is intact and most of the induction pipes still on tight. if it's not creating any boost, could the turbine/comp be seized? removed the inlet pipe and spin the wheel, yup it's still lubed and spinning freely so the turbo is fine. but then spotted down below in the shadows that the boost pipe on the turbo compressor outlet has popped off, that's why it ain't creating any boost and run a normal mixture. [ATTACH=full]43257[/ATTACH] removed the pipe and urm yeh this boost pipe is the next weak spot to strengthen. there's no bead lip on the ends and that rubber coupler that attaches the small 90deg very tight elbow to the turbo outlet is having a hard time holding on. reattached it [B]11:24 Run 3 --------------------------------------------------------------------------------------------------------------------------------------------------------[/B] [U]Before:[/U] Setup: [INDENT]Dampers: 15/30 F/R Tyres: 595RSR 2.0/2.7bar F/R Weight: 50% fuel, driver only[/INDENT] [U] During:[/U] Track Condition: intermediate Brake Bias: 50/50% F/R [MEDIA=youtube]IlyEwokvd8k[/MEDIA] Track Feedback: [LIST] [*]tyres & brakes had cooled down during the fix so initially during outlap the cold brakes not as effective and the cold 595RSR were squeeling under medium corner loads so gradually warmed em up slowly. [*]once brakes n tyres are back upto hot temps they grip hard. [*]brakes no longer lock so moved bias all the way back 50/50 for max braking force [*]brakes are now very effective, limited by how hard I can press and can slow down very quickly [*]hot brake pedal now stops 5mm above the throttle, so it doesn't sink as much with these smooth discs but seems the fluids still boiling very slightly [*]red new seats very lacking in support. had to wedge legs against doorcards. seat base too firm, flat & high, needs more foam cutting out cos I'm submarining/slouching forwards [*]slight highspeed understeer exiting Bunga bunga [/LIST] Track Times: [COLOR=#ff0000]1.30 traffic 1.30 traffic 1.32 traffic 1.28 traffic 1.32 traffic 1.27 traffic 1.39 traffic 1.31 traffic[/COLOR] 1.24s [COLOR=#ff0000]1.34 traffic 1.30 traffic[/COLOR] [B]12.15 Run 4 --------------------------------------------------------------------------------------------------------------------------------------------------------[/B] Tried reducing front pressure down to 1.9bar and front dampers soften to 10clicks to see if it resolves the highspeed understeer [U]Before:[/U] Setup: [INDENT]Dampers: 10/30 F/R Tyres: 595RSR 1.9/2.7bar F/R Weight: 25% fuel, driver only[/INDENT] [U] During:[/U] Track Condition: drying Brake Bias: 50/50% F/R The cabin camera now kept corrupting from any power cut (the remote didn't stop the cabin camera before I turned ign off) but still had footage of the suspension & pedals. [MEDIA=youtube]fe9Ds1ItwLI[/MEDIA] Track feedback: [LIST] [*]slightly worse understeer [*]look at the unbalanced soft CV boot flapping at high speed! I need to stop that happening before it splits itself apart [*]on lap 4 @6:20 whilst going flat out round the bumpy Curva Grande I lost my footing and braked too late, badly understeered and spun off to the gravel. had the slomo moment of looking at that blue traffic cone that I'm skidding towards and thinking oh sheet I'm gonna go off track & hit that with no control #squint# thank gawd it's not an armco barrier [/LIST] Track Times: 1.26 [COLOR=#ff0000]1.29 traffic[/COLOR] 1.24 spun nursed back home with loadsa gravel dropping out of her. back at pits the front left tyres abit worse for wear with gravel stones wedged right into the rims. [ATTACH=full]43246[/ATTACH] [ATTACH=full]43247[/ATTACH] [ATTACH=full]43255[/ATTACH] this sidewall mis-shaping from the gravel stones doesn't look safe so since its almost lunch break I head out to try look for any open tyre shops to help deflate & clean the stones out the rims...on a sundayo_O get food & refuel. she did just 17-19mpg on track :confused: was abit tricky, kwikfit was very busy but i found some hidden corner tyre place and the top blokes fixed & balanced the front left tyre for free :D [/QUOTE]
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