wstar's Journal

ssqpolo · 04-22-2009, 11:35 PM

nah, i wont complain...maybe about the price! anyway, ur car seems to be coming along great. congrats

Bibimbap · 04-23-2009, 12:39 AM

Sorry if this has been asked before (tried to search), but have you gotten a baseline dyno? Keep up the awesome analysis on your car!

wstar · 04-23-2009, 12:40 AM

Quote:

Originally Posted by Bibimbap

Sorry if this has been asked before (tried to search), but have you gotten a baseline dyno? Keep up the awesome analysis on your car!

I never did a baseline on this car stock, the only dyno info I have is from after the full exhaust and gen3 intakes were in place.

semtex · 04-23-2009, 10:27 AM

Hey wstar, you and I have identical setups right now, don't we? All except for 6MT vs. 7AT? It's interesting to see the difference in our whp, given that we both dyno'd on Dyno Dynamics.

travisjb · 04-23-2009, 10:39 AM

Sounds like a little friendly competition !

Wstar, also I recall you hit about 250 oil temp a while back... have you seen anything higher since ? ... I'm still trying to validate my theory that the guys driving AT cars aren't overheating nearly as often as the rest of us

wstar · 04-23-2009, 10:53 AM

Quote:

Originally Posted by travisjb

Sounds like a little friendly competition !

Wstar, also I recall you hit about 250 oil temp a while back... have you seen anything higher since ? ... I'm still trying to validate my theory that the guys driving AT cars aren't overheating nearly as often as the rest of us

I've been up to 260 peak. I wouldn't think the transmission would make the difference though. It's probably just that nobody in a 7AT has really tracked the car.

travisjb · 04-23-2009, 11:33 AM

Quote:

Originally Posted by wstar

I've been up to 260 peak. I wouldn't think the transmission would make the difference though. It's probably just that nobody in a 7AT has really tracked the car.

There's prob some truth to your point that fewer AT folks are inclined to track their cars... and I agree the transmission itself isn't likely... and I also think this car runs hot regardless of transmission... but I think with the manual folks are spending more time at higher RPMs, which is a contributing factor... oil heats up with friction and I suspect friction increases non-linearly with RPMs... automatic transmissions should reduce time at higher RPMs vs manual b/c when it upshifts it does so with 99% precision... and I think realistically, most of us guys with manual transmissions are keeping on the gas at least a little between upshifts... and so for example even if we shift at 7,400 rpm, the car is running up to 7,800 rpm when the clutch is pressed... I suspect a lot of heat is building up between 7,500 and 8,000 rpm for the 6mts... Drivers can help by lifting the gas sooner, but I don't blame it all on us drivers, I think the engagement points in the clutch are too high in the pedal stroke... Based on my own experience and from watching videos of guys driving this car, I'm convinced it is happening a lot... until I find some AT guys overheating, I'm going to keep asking the question... sorry for the long-winded explanation!

miguez · 04-23-2009, 12:35 PM

Quote:

Originally Posted by travisjb

There's prob some truth to your point that fewer AT folks are inclined to track their cars... and I agree the transmission itself isn't likely... and I also think this car runs hot regardless of transmission... but I think with the manual folks are spending more time at higher RPMs, which is a contributing factor... oil heats up with friction and I suspect friction increases non-linearly with RPMs... automatic transmissions should reduce time at higher RPMs vs manual b/c when it upshifts it does so with 99% precision... and I think realistically, most of us guys with manual transmissions are keeping on the gas at least a little between upshifts... and so for example even if we shift at 7,400 rpm, the car is running up to 7,800 rpm when the clutch is pressed... I suspect a lot of heat is building up between 7,500 and 8,000 rpm for the 6mts... Drivers can help by lifting the gas sooner, but I don't blame it all on us drivers, I think the engagement points in the clutch are too high in the pedal stroke... Based on my own experience and from watching videos of guys driving this car, I'm convinced it is happening a lot... until I find some AT guys overheating, I'm going to keep asking the question... sorry for the long-winded explanation!

That's a very good point Travis, probably some truth to that. Also, let's keep in mind the ambient temperature of the locations and days people are reporting engine oil temps, as during this time of the year there can be great temp variations between locations in the US.

wstar · 04-23-2009, 12:41 PM

Quote:

Originally Posted by travisjb

and so for example even if we shift at 7,400 rpm, the car is running up to 7,800 rpm when the clutch is pressed... I suspect a lot of heat is building up between 7,500 and 8,000 rpm for the 6mts...

Even if the driver lets the revs go up when hitting the clutch, shouldn't the rev limiter still stop you around 7.5? With a drive-by-wire throttle, it's not like the rev limiter could ever fail or be confused. Ultimately it's always in control.

miguez · 04-23-2009, 12:50 PM

Quote:

Originally Posted by wstar

Even if the driver lets the revs go up when hitting the clutch, shouldn't the rev limiter still stop you around 7.5? With a drive-by-wire throttle, it's not like the rev limiter could ever fail or be confused. Ultimately it's always in control.

If I recall correctly, I have seen some dyno graphs showing up to 7,800 rpms being reached. I'm not exactly sure if that's accurate or not...?

SoCal 370Z · 04-23-2009, 11:00 AM

This poses an interesting quandary as Nissan will void a warranty on a 370Z where there is "overheating of the powertrain." Does anyone here know what is recorded by the engine's ECU that can be read by Nissan techs? And at what temperature, and above, does Nissan consider the 370Z's engine overheated?

travisjb · 04-23-2009, 10:27 PM

Wstar, I seem to remember getting over 7500 with the clutch in... my car's in the shop otherwise I'd go test my theory - I'm going off memory... even if the rev limiter were keeping the engine in check, there's no question in my mind that a mis-timed clutch is going to result in more time at the upper end of the rev range...

I'm going to stop harping on this point, because I know ppl will get tired of it... but someday I'm sure I'll be vindicated !

wstar · 04-24-2009, 12:29 AM

Throttle body coolant lines deleted this evening. DIY info and pics here: DIY: TB Coolant Delete

RCZ · 04-24-2009, 12:28 PM

You cant rev the car past 5XXXrpm in neutral. You guys ever notice this? Might be a built in limiter to protect the engine.

I went with the factory ester oil for my oil change. I wanted to see if the oil cooler does its job without worrying about whether the oil had something to do with it.

From what my tech said, nothing will happen if you switch to syn, the only problem is that the valvetrain will be a lot louder. You are going to get clicking...

travisjb · 04-24-2009, 12:32 PM

Quote:

Originally Posted by RCZ

You cant rev the car past 5XXXrpm in neutral. You guys ever notice this? Might be a built in limiter to protect the engine.

Did you verify that in your car or are you echoing the comment from the other thread ? If you verified, have you tried it when shifting from 1st to 2nd ?... ie I'd understand if you were just sitting there standstill with clutch pushed in it might limit to 5K... I'd guess that nissan did this to avoid having folks pop the clutch at 7k in 1st gear - would take a toll on the drivetrain and drive warranty costs... but something tells me that between upshifts the revs aren't limited in this way... still depending on someone else to verify - car in shop

04-23-2009, 10:27 AM	#4 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	Hey wstar, you and I have identical setups right now, don't we? All except for 6MT vs. 7AT? It's interesting to see the difference in our whp, given that we both dyno'd on Dyno Dynamics. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

04-23-2009, 11:00 AM	#11 (permalink)
SoCal 370Z A True Z Fanatic Join Date: Feb 2009 Location: US of A Posts: 2,842 Drives: Answers Rep Power: 34	This poses an interesting quandary as Nissan will void a warranty on a 370Z where there is "overheating of the powertrain." Does anyone here know what is recorded by the engine's ECU that can be read by Nissan techs? And at what temperature, and above, does Nissan consider the 370Z's engine overheated? __________________ ( Click to show/hide ) Why I NEVER say NO to the Panda Lou Fusz!!!

04-24-2009, 12:29 AM	#13 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	Throttle body coolant lines deleted this evening. DIY info and pics here: DIY: TB Coolant Delete __________________ 7AT Track Car! Journal thread / Car setup details

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04-22-2009, 11:35 PM	#1 (permalink)
ssqpolo Track Member Join Date: Jan 2009 Location: Florida Posts: 882 Drives: '12 Black Nismo Rep Power: 268	nah, i wont complain...maybe about the price! anyway, ur car seems to be coming along great. congrats

04-23-2009, 12:39 AM	#2 (permalink)
Bibimbap Base Member Join Date: Dec 2008 Location: Dania, FL Posts: 148 Drives: 04 S2000 Rep Power: 17	Sorry if this has been asked before (tried to search), but have you gotten a baseline dyno? Keep up the awesome analysis on your car!

04-23-2009, 10:39 AM	#5 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	Sounds like a little friendly competition ! Wstar, also I recall you hit about 250 oil temp a while back... have you seen anything higher since ? ... I'm still trying to validate my theory that the guys driving AT cars aren't overheating nearly as often as the rest of us

04-23-2009, 10:27 PM	#12 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	Wstar, I seem to remember getting over 7500 with the clutch in... my car's in the shop otherwise I'd go test my theory - I'm going off memory... even if the rev limiter were keeping the engine in check, there's no question in my mind that a mis-timed clutch is going to result in more time at the upper end of the rev range... I'm going to stop harping on this point, because I know ppl will get tired of it... but someday I'm sure I'll be vindicated !

04-24-2009, 12:28 PM	#14 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	You cant rev the car past 5XXXrpm in neutral. You guys ever notice this? Might be a built in limiter to protect the engine. I went with the factory ester oil for my oil change. I wanted to see if the oil cooler does its job without worrying about whether the oil had something to do with it. From what my tech said, nothing will happen if you switch to syn, the only problem is that the valvetrain will be a lot louder. You are going to get clicking...