Dan_NI 0 Posted April 16, 2007 well guys, was at a rr day on saturday with the NI branch of clubgti was a great day. my results were 185bhp@(about)5600rpm and 145bhp at the wheels and 197lb/ft@(about)4250rpm not exactly sure of the the rpm's as don't have the printout in front of me! the car has been superchipped, magnex cat back exhaust and a k&n cone filter but i reckon this is sapping power. just wondering are these results near the mark and could you put the increase in torque down to those mods? any ideas? Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted April 16, 2007 I assume it's a VR? On a RR, the K&N might even help given that the bonnet is open and huge fans will be ensuring that the filter is fed with lots of cool air. The K&N will start to sap power when the bonnet is down and all the warm air is insulated in the engine bay. Quote Share this post Link to post Share on other sites
Dan_NI 0 Posted April 16, 2007 yeah its a vr! the guy kept the bonnets closed and only had a small fan i'll find a pic of it. He seemed to know what he was at though as there was a s2000 engined caterham there to be setup aswell. Quote Share this post Link to post Share on other sites
gradeAfailure 0 Posted April 16, 2007 Does the car feel fast enough on the road for you? If so, don't get too hung up on RR figures - calculating flywheel figures from wheel figures is more of an art than a science... unless the curve is showing major flat spots, under/over-fuelling, or you're not happy with how fast it is, RR figures are just for pub bragging... ;) Just my 2penn'orth... Quote Share this post Link to post Share on other sites
Dan_NI 0 Posted April 16, 2007 here's the fan not exactly a monster :lol: Quote Share this post Link to post Share on other sites
G60SC_Stoney 0 Posted April 16, 2007 i'd say thats good, check out my sig below and you'll see that you put out more torque than mine, and mine is charged and cam'd. Quote Share this post Link to post Share on other sites
Dan_NI 0 Posted April 16, 2007 thats surprising i thought the supercharger would add torque aswell as top end. I'm happy enough with the results was just wondering how accurate the torque was! Would like to do a few mods to get closer to 200bhp Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted April 16, 2007 That is quite a tiny fan. The place I use has two of the fans in this pic: Did they measure your a/f ratio as well? Quote Share this post Link to post Share on other sites
Dan_NI 0 Posted April 16, 2007 Now thats a fan! They did is there anything i should be looking for on it? Quote Share this post Link to post Share on other sites
Taggart 0 Posted April 16, 2007 That's not a fan. This is a fan. Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted April 16, 2007 I'm not an expert on "tuning" on a RR by any means but you should be looking for a nice stable A/F which get's richer as the engine is put under load. I don't know what the optimim A/F ratio should be on a VR but I'd guess at between 12 and 13:1. 14 is stoichiometric i.e all fuel is burnt but this is close to running lean which is bad. 12 and 13 is a good starting point as a little unburnt fuel cools the charge and prevents det. Put up your graphs and I'm sure you'll get lots of VR experts analysing the charts and gving you decent tips. Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted April 16, 2007 Jesus xbones! Is that what makes the earth rotate?! Quote Share this post Link to post Share on other sites
G60SC_Stoney 0 Posted April 16, 2007 yeah, what exactly is that for ?? filling a REALLY big bouncy castle ? Quote Share this post Link to post Share on other sites
Neil VR6 0 Posted April 16, 2007 Inflating Bono's ego? Quote Share this post Link to post Share on other sites
