suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 Do you think this is down to inaccuracy of dyno's?? Was this run at the same AFR etc etc?? Quote Link to comment Share on other sites More sharing options...
Gamer Posted July 25, 2007 Share Posted July 25, 2007 Thanks Joe, a question i have.. how do we know what is accurate and what isnt?? in dyno readings...??? It is usually not good to compare runs from different RR's, you should really stick to one and continue your tuning using the same one as you should get more consistent results that way. At the end of the day it is just a figure that the specific RR that you are using has calculated taking quite a few variables into consideration. The only way to find out the engines true power is to have it taken out and put on an engine dyno. You should be happy with what you have now mate, I would trust that figure that you got. Quote Link to comment Share on other sites More sharing options...
Gamer Posted July 25, 2007 Share Posted July 25, 2007 Do you think this is down to inaccuracy of dyno's?? Was this run at the same AFR etc etc?? Two completely different machines, using different software and operators. Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 It is usually not good to compare runs from different RR's, you should really stick to one and continue your tuning using the same one as you should get more consistent results that way. At the end of the day it is just a figure that the specific RR that you are using has calculated taking quite a few variables into consideration. The only way to find out the engines true power is to have it taken out and put on an engine dyno. You should be happy with what you have now mate, I would trust that figue that you got. Im very happy Joe, and im not really wanting to go any further... feeling 712hp on the road is amazing and crazy really.. hence ill be running on around at 1 bar mostly.... going just over 200mph in a supra is allso amazing. Quote Link to comment Share on other sites More sharing options...
Pig Posted July 25, 2007 Share Posted July 25, 2007 I like to go on rwhp figures as it stops the inaccuracy of losses Nice figures BTW Quote Link to comment Share on other sites More sharing options...
Gamer Posted July 25, 2007 Share Posted July 25, 2007 Enjoy it mate Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 I like to go on rwhp figures as it stops the inaccuracy of losses Nice figures BTW How's yours coming allong John? Quote Link to comment Share on other sites More sharing options...
Pig Posted July 25, 2007 Share Posted July 25, 2007 How's yours coming allong John? Still in my garage, back off the road again Saving up for the work again, HKS T04Z for me i think.... hope to get it sorted within a month. Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 Still in my garage, back off the road again Saving up for the work again, HKS T04Z for me i think.... hope to get it sorted within a month. Fingers crossed youll be on the road soon John, Be interested to see your results compared to mine.... the to4z is a damn good turbo... Quote Link to comment Share on other sites More sharing options...
Jake Posted July 25, 2007 Share Posted July 25, 2007 Jake those losses are the same as yours and mine mate, it was the same RR. Yeah I know it's the same dyno but mine was only 18% drivetrain losses. I do know howwever Dangerous Brain on here (apparantly) Took it to another DynoPack then took it to maplins and the figure differences were somewhat interesting in there differences.... i.e at the hubs figure for the 1st dyno was the same as the fwhp fig at maplin motorsports. Yeah, that sounds about right. The figures from hub dynos (eg the famous Thor one) are considered by many folks to be flywheel figures rather than hub or wheel BHP. Quote Link to comment Share on other sites More sharing options...
Alex Posted July 25, 2007 Share Posted July 25, 2007 Hub dyno's are not as reliable for power runs as standard ones...but what they do give is repeatability for mapping. The most accurate wheel dyno I knew of was the G-Force one...not sure if that's still that case. I think it's best to get 3 results from 3 different dyno's if you really want to know where it's at.... ...but how it goes on the black stuff next time you have a roll on with a ferrari is all that counts Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 Whats even more amazing i've just done some mpg calculations.. at a constant 75mph doing 95 miles i used 2.5 gallons... thats spending allot of time on my off boost map... im well amazed. Ive done a km to miles converstion as my speedo reads in km/h, worked it out at 38 to the gallon!!!! Quote Link to comment Share on other sites More sharing options...
Alex Posted July 25, 2007 Share Posted July 25, 2007 Whats even more amazing i've just done some mpg calculations.. at a constant 75mph doing 95 miles i used 2.5 gallons... thats spending allot of time on my off boost map... im well amazed. Ive done a km to miles converstion as my speedo reads in km/h, worked it out at 38 to the gallon!!!! I'd expect 28mpg....you sure you used british gallons?? Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 I'd expect 28mpg....you sure you used british gallons?? Oh yes.... 4.54 litres to a gallon... £11.45 in optimax Quote Link to comment Share on other sites More sharing options...
Jake Posted July 25, 2007 Share Posted July 25, 2007 How do you know that you used 2.5 gallons? You filled it up before and after the 95 miles? Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 How do you know that you used 2.5 gallons? by calculating the amount of litres used! and yes i did fill up before and after Quote Link to comment Share on other sites More sharing options...
Jake Posted July 25, 2007 Share Posted July 25, 2007 You filled it up, drove 95 miles then filled it again? And it only took 2.5 gallons to fill it? Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 You filled it up before and after the 95 miles and it only took 2.5 gallons to fill it? oh yes... but we spent an hour or so leaning out the cruise and part throttle map today... Quote Link to comment Share on other sites More sharing options...
Jake Posted July 25, 2007 Share Posted July 25, 2007 Blimey. Quote Link to comment Share on other sites More sharing options...
suprafan72 Posted July 25, 2007 Author Share Posted July 25, 2007 Blimey. my thoughts exactly.. i had to look at the pump twice and check it was full.. but true....my cruise is 14.7 at part throttle stays that way too until it comes on boost..... Quote Link to comment Share on other sites More sharing options...
Nic Posted July 26, 2007 Share Posted July 26, 2007 With no offence Jurgen, from Japan and delivered £1500 Similar price from here too if anyone needs one. Quote Link to comment Share on other sites More sharing options...
Guest SKILLZ101 Posted July 26, 2007 Share Posted July 26, 2007 Ok here it is... 1.4 Bar run... the graph says 1.5 but the run was at 1.4 type o..... Think i will leave it at that for a while.. Did manage a 140 km/h to 325 km/h run in 30 secs (timed) on a private road on the way home of course DAMN!!! that dyno graph is smooth! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.