Rolls Posted July 4, 2011 Share Posted July 4, 2011 (edited) Oh also what was your rim and tyre size? If anyone is interested this is how I convert, I'll assume the nismo is 4.4 KM/H x (1000/60) This gives your speed in meters per minute. pi x Diameter (in metres) This will give you the cirucumference of your wheel in metres. Speed / Circumference This gives how many rpm of wheel per minute. Then divide by diff ratio if in 4th. Edited July 4, 2011 by Rolls Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896739 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 Was running 245/40/18 I'm interested to see now lol. Would it be 4.4 if it has shorter gears? Edit. Just read r32 has 4.3?? Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896757 Share on other sites More sharing options...
JonnoHR31 Posted July 4, 2011 Share Posted July 4, 2011 4.375 so closer to 4.4 Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896773 Share on other sites More sharing options...
joeyjoejoejuniorshabadoo Posted July 4, 2011 Share Posted July 4, 2011 just for comparison's sake i looked up an old dyno dynamics sheet from my car and it hit 18psi @ around 93kph (which was around 3400 on most dyno's) Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896781 Share on other sites More sharing options...
Rolls Posted July 4, 2011 Share Posted July 4, 2011 (edited) Assuming 17" rims and 235 tyres looks like 110kph is about ~4000 rpm so peak boost by 35-3700 is believable given those calcs. Edited July 4, 2011 by Rolls Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896791 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 Would 18s make it better or worse? Sorry full noob at this shit Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896799 Share on other sites More sharing options...
Rolls Posted July 4, 2011 Share Posted July 4, 2011 (edited) Would 18s make it better or worse? Sorry full noob at this shit I just re did it with 240x40x18 and it is 3955 vs 4010rpm for 110kph Use these websites http://www.rkm.com.au/calculators/calculator-circle-sphere.html another calc RPM = (diff ratio * (mph * 88)) / (tire circumfrance in inches / 12) * transmission 4th ratio Edited July 4, 2011 by Rolls Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896805 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 You know your shit haha. K my bro is going to send me his gtx30 dyno sheet and he believes it's very laggy. We will see Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896820 Share on other sites More sharing options...
Rolls Posted July 4, 2011 Share Posted July 4, 2011 You know your shit haha. K my bro is going to send me his gtx30 dyno sheet and he believes it's very laggy. We will see It is just advanced google fu. Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896834 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 It is just advanced google fu. I'm lazy lol Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896838 Share on other sites More sharing options...
tridentt150v Posted July 4, 2011 Share Posted July 4, 2011 I just re did it with 240x40x18 and it is 3955 vs 4010rpm for 110kph thats high revving for 110km/h??? Is that where theory and practise are different?? Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896873 Share on other sites More sharing options...
Rolls Posted July 4, 2011 Share Posted July 4, 2011 thats high revving for 110km/h??? Is that where theory and practise are different?? Sounds about right with 4.4 diff gears ? Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5896880 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 Just measured on my boost controller and powerfc rpm. Got 3410rpm and 3439rpm hitting 18psi in 4th. Dunno how accurate that is tho lol Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5897155 Share on other sites More sharing options...
Rolls Posted July 4, 2011 Share Posted July 4, 2011 (edited) Just measured on my boost controller and powerfc rpm. Got 3410rpm and 3439rpm hitting 18psi in 4th. Dunno how accurate that is tho lol Pretty damn accurate I'd say as it is using the CAS and it is low rpm (at high rpm the CAS signal can get inccurate in some cars). Could you try 2nd gear just out of curiosity? as that is what I think most people are interested in. Edited July 4, 2011 by Rolls Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5897231 Share on other sites More sharing options...
krzysiu Posted July 4, 2011 Share Posted July 4, 2011 Pretty damn accurate I'd say as it is using the CAS and it is low rpm (at high rpm the CAS signal can get inccurate in some cars). Could you try 2nd gear just out of curiosity? as that is what I think most people are interested in. Yea I'll give it a squirt tomorrow night haha Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5897300 Share on other sites More sharing options...
Don Dada Posted July 4, 2011 Share Posted July 4, 2011 Geeze....why dont you guys just request rpm on your sheet to make it easier for you and everyone else to understand...... Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5897331 Share on other sites More sharing options...
ido09s Posted July 4, 2011 Share Posted July 4, 2011 If its making that much boost in fourth its not really going to be a whole lot different in second. If anything it wont make full boost as the motor wont have the same ammount of load on it. Its always harder to get full boost in the lower gears. I would be pretty happy with that sort of response. I know the T78 on our car makes full boost (22-23psi) by about 4500rpm and i built an R32 GTR a few years back that made about 5 psi of boost with a T78 at 2500rpm, full boost (again 22-23psi) by no later than 4000rpm. It was a pretty insane GTR to be honest and a bit of a freak engine. Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5897468 Share on other sites More sharing options...
ltcree Posted July 5, 2011 Share Posted July 5, 2011 Hey Simon, What was the rear housing on the GT? .63 as well? Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5898684 Share on other sites More sharing options...
Simon-S14 Posted July 5, 2011 Author Share Posted July 5, 2011 yeah both used the same 0.63 garret 4 bolt T rear housing which i had ceramic coated also. Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5898787 Share on other sites More sharing options...
STATUS Posted July 5, 2011 Share Posted July 5, 2011 double post Link to comment https://www.sau.com.au/forums/topic/369550-gtx3076r-vrs-gt3076r-a-true-comparison/page/5/#findComment-5899023 Share on other sites More sharing options...
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