Oiling situation (gauge spoof) on the race track (nothing to see here)
08-02-2011, 01:26 PM
#76
Rennlist Member
Mark,
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
08-02-2011, 04:38 PM
#78
Race Director
nice laps! you can hear, you are near the limit of those tires. was that with the big tires or your normal 245s DOT Rs?
pretty funny. makes me smile to hear the automatic again! it would be interesting to see what a stick would buy you . there are quite a few times where you are just bogging along. also i would be even more interesting to see this car with the euro 5 liter power and big tires and rims.
Im still waiting for you do jump into a NASA race and run the GTS2 group!!
I liked the video with the mustang. just shows you need more power. you were mopping him up in the turns, but even his 400hp but porkey weight, was still enough power to just pull away and crush you on the straights. pretty funny! just about 50 more hp plus the bigger tires and rims, and you would be able to hang with a car 25 years newer, and about $50k more in cost!
pretty funny. makes me smile to hear the automatic again! it would be interesting to see what a stick would buy you . there are quite a few times where you are just bogging along. also i would be even more interesting to see this car with the euro 5 liter power and big tires and rims.
Im still waiting for you do jump into a NASA race and run the GTS2 group!!
I liked the video with the mustang. just shows you need more power. you were mopping him up in the turns, but even his 400hp but porkey weight, was still enough power to just pull away and crush you on the straights. pretty funny! just about 50 more hp plus the bigger tires and rims, and you would be able to hang with a car 25 years newer, and about $50k more in cost!
It does feel like I am trying really hard in the corners....vs videos of the same lap time in the widow with big tires that aren't even squealing....
GTS2 IS the plan for next year.....after testing the car this Friday, I will get it dyno'd again and develop a plan to make it class for GTS2 14.5 power-weight.... top GTS2 cars are 2:05-7 over the bypass....but GTS3 cars (next class faster) are flying at 1:57's.....much faster for 11-1 vs 14.5-1
08-02-2011, 06:31 PM
#79
Race Car
Mark,
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
Dan
'91 928GT S/C
475hp/460lb.ft
08-03-2011, 07:31 PM
#82
Rennlist Member
Thread Starter
Sorry, ill have to downgrade that to an almost insignificant point.
why, becuase each track has its OWN range of speeds. Its up to the operator to choose the appropriate gear . for example, if you went to laguna seca, you could NEVER hit the rev limiter out of the major g loading exit of the corkscrew or the exit of turn 11. I can. There are countless of examples of this. However true to your point, there are some track's turns where my gear selected would be running at a lower RPM than you would. Turn 2 for example at thunderhill. however as you change hp and grip, all this changes as well. look no farther than the sucess that Fan has had with the 2.73 at all the tracks I see as well , and has not had any issues. Anderson ran a 2.2 right up to about 2001 and then changed over to the 2.73 GTS box
As a racer, its your job to operate the car at the rpm that will yield the best exit speed and power for acceleration. if you are crusing around a turn 2 at thunderhill in 3rd gear running 6500rpm in a GTS or equiv gear box, when acceleration is not needed, then you might run the risk of some issues.
The real point here is that the gear spacing is the same, so it wont matter with a big enough cross section test of tracks. in otherwords, if you are driving a track with a 73mph sweeper and I run one that has a 80mph sweeeper as its primary , engine-challenging turn, then both our cars will be running the same g loading and RPM ranges. Does that make sense??
anyway, go time your time spent in the HIGHER rpm ranges over a lap. im sure it will be idential or possibly even less than mine.
Also keep in mind, scot runs the 2.75 rear end. I raced that car in 3 full points races at laguna. in actuality, the RPM ranges used were no different than my car, though the times were much slower. why, less HP. another factor of the equation. But, the bottomline, he has been racing the 2.75 for years, running as fast as a 1:42.xx at Laguana seca. no oiling issus for the several engines we have put together for him to race with.
why, becuase each track has its OWN range of speeds. Its up to the operator to choose the appropriate gear . for example, if you went to laguna seca, you could NEVER hit the rev limiter out of the major g loading exit of the corkscrew or the exit of turn 11. I can. There are countless of examples of this. However true to your point, there are some track's turns where my gear selected would be running at a lower RPM than you would. Turn 2 for example at thunderhill. however as you change hp and grip, all this changes as well. look no farther than the sucess that Fan has had with the 2.73 at all the tracks I see as well , and has not had any issues. Anderson ran a 2.2 right up to about 2001 and then changed over to the 2.73 GTS box
As a racer, its your job to operate the car at the rpm that will yield the best exit speed and power for acceleration. if you are crusing around a turn 2 at thunderhill in 3rd gear running 6500rpm in a GTS or equiv gear box, when acceleration is not needed, then you might run the risk of some issues.
The real point here is that the gear spacing is the same, so it wont matter with a big enough cross section test of tracks. in otherwords, if you are driving a track with a 73mph sweeper and I run one that has a 80mph sweeeper as its primary , engine-challenging turn, then both our cars will be running the same g loading and RPM ranges. Does that make sense??
anyway, go time your time spent in the HIGHER rpm ranges over a lap. im sure it will be idential or possibly even less than mine.
Also keep in mind, scot runs the 2.75 rear end. I raced that car in 3 full points races at laguna. in actuality, the RPM ranges used were no different than my car, though the times were much slower. why, less HP. another factor of the equation.
But, the bottomline, he has been racing the 2.75 for years, running as fast as a 1:42.xx at Laguana seca. no oiling issus for the several engines we have put together for him to race with. Mark,
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
You are also missing a major point. No race car in Europe has your transmission. All of us here run the 2.72 early/GT rear end and a few lucky ones run the strongest of them all 2.73 rear end GTS gearbox. You run the 2.20 US box... No wonder we run higher rpm in the corners and spend more time at higher rpm than you do...
08-03-2011, 07:33 PM
#83
Rennlist Member
Thread Starter
Always!
They were implied!
Its always good!
Yep and here I go!
Its always good!
Yep and here I go!
08-03-2011, 07:49 PM
#84
Rennlist Member
Thread Starter
by the way Jim. You were right. it wasnt that dipstick electrical connection, it was one by the guage itself. I was wiggling wires again today after getting the oil hot and did the HIGH rpm run for 30 seconds, and then pullled some Gs. nothing was moving. when I got behind the guage i was able to get some movment from the needle. tighten things up and cant replicate it now. so we will see at sears point if there is still an issue. probably not. i should have noticed this over the years and I didnt, so i bet its fixed now. got to find someother way to detect what is happening in the pan under high g loading . i think the oil level sensor should be modified somehow.
anyway, double false alarm. sorry!
anyway, double false alarm. sorry!
08-03-2011, 08:03 PM
#85
Race Director
MK IS BACK..................................
talk of torque vs HP
Or the effects of taller vs lower final drive
OR the success he has had on track (in keeping 928 engines alive)
talk of torque vs HP
Or the effects of taller vs lower final drive
OR the success he has had on track (in keeping 928 engines alive)
08-04-2011, 01:28 AM
#86
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Thanks Mark for finding the real problem.......Real racer cars have different transmissions with different gear ratios for different tracks....... lacking that we make do with what we have and sometimes hold a gear a bit too long , carry too much RPM in a corner or end up short shifting. Or simply have the wrong gear spacing...I had the sump to the full line and in the first laps at speed sucked up a bit of oil and freaked out the guys behind me who thought I blew an engine, then it was fine although I held the RPM down and shifted a bit sooner...
