singh87 Member 50 Member For: 11y 6m 30d Gender: Male Posted 22/04/15 05:49 AM Share Posted 22/04/15 05:49 AM Hi guys have u came across this?? I own fg mk2 turbo . Standrad tyres and wheels make 285rwkw to 300rwkw, 285 constant all times as f6 cooler get hot drop power. Now problem is I upgrade to 20 inch wheels and tyres rear 275/30/20 with achiles and I upgrade process west stage 1 cooler and put back on dyno and is showing less power, 278rwkw. Loss like 20 kw. Tuner say is coz wide tyrres and they sticky. He say dyno just read low bt u havent loss and power. I was hoping to crack 300wkw. Bt nw dats happen?? Any ideas or similar experience??? Link to comment Share on other sites More sharing options...
Bizkets is Drunk? Too heavy needs boost Member 5,929 Member For: 11y 6m 13d Gender: Male Location: Adelaide Posted 22/04/15 06:03 AM Share Posted 22/04/15 06:03 AM Put ya 19" back on 1 Link to comment Share on other sites More sharing options...
singh87 Member 50 Member For: 11y 6m 30d Gender: Male Posted 22/04/15 06:08 AM Author Share Posted 22/04/15 06:08 AM Hi guys I own fg mk2 turbo.change my standard rims to 20inchs, on standarrd. Tyrs car use to make285kw to 300kw coz f6 cooler heats up loss power bt 285 constant. I upgrade wheels tio 20 inchs, on rear 275/30/20 achiles.and upgrade cooleer process west stage1. Dynoed it today and is showed less power 278kw. I was hoping tio crack 300kw. Tuner say big and wide wheels and tyressticky so dyno read low!!! He say u havent loss any power !!! Is this normal?? Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 4m 26d Gender: Male Location: Perth Posted 22/04/15 06:12 AM Share Posted 22/04/15 06:12 AM One thread be enough thread Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 25d Gender: Male Location: Probably above atmospheric pressure Posted 22/04/15 06:17 AM Share Posted 22/04/15 06:17 AM Even if the tyres gripped the rollers the same, I've read that a diameter change like that will affect the power output reading.Better way would be 1/4 mile trap speeds I think?Or hub dyno, but too late to do a before and after anyway without paying more for the privilege. Link to comment Share on other sites More sharing options...
singh87 Member 50 Member For: 11y 6m 30d Gender: Male Posted 22/04/15 06:24 AM Author Share Posted 22/04/15 06:24 AM I check with befre hub dyno without upgrading wheels and cooler was a minor diff in power, roller dyno show 285kwand hub shows 288kw. May be I try to put on hub dyno again c wats diff?? Wat my ques is did I loss power in real time or gain?? Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 4m 26d Gender: Male Location: Perth Posted 22/04/15 06:33 AM Share Posted 22/04/15 06:33 AM 1 Link to comment Share on other sites More sharing options...
PTR_NITRO_FG Donating Members 3,214 Member For: 11y 8m 24d Gender: Male Location: NOR Perth Posted 22/04/15 06:39 AM Share Posted 22/04/15 06:39 AM moral of that story is stick to 15s? 1 Link to comment Share on other sites More sharing options...
singh87 Member 50 Member For: 11y 6m 30d Gender: Male Posted 22/04/15 06:46 AM Author Share Posted 22/04/15 06:46 AM So mean , big wheels and tyres u loss power?? If I go back on 18inch do I need to retune or is be ok? Link to comment Share on other sites More sharing options...
PTR_NITRO_FG Donating Members 3,214 Member For: 11y 8m 24d Gender: Male Location: NOR Perth Posted 22/04/15 06:53 AM Share Posted 22/04/15 06:53 AM Yes, that picture seems to confirm the lower the rim size, the faster 0-60mph time was achieved (only slightly faster like 0.1 - 0.3 seconds lol)But I have heard dyno figures can be slightly lower, when you use bigger rims. And no re tune necessary for rim change LOL.....but you may have to pay for another dyno run if you want to see another power figure? 18s will have a higher profile tyre and usually a little better grip....that is why I stayed with 18s (but sometimes wish I had 19s cause looks better) Link to comment Share on other sites More sharing options...
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