SAE testing done...AutoLine After Hours
05-17-2013, 09:55 AM
#41
Le Mans Master
Spoken like a true sam90lx...misses the whole point...has to say some negative bs...
Read about stretching a gear when road racing then get back to me. Even if it doesnt make power extra rev to work with cuts track times...same as increasing slick size to avoid a shift just before the traps to cut your et...
Read about stretching a gear when road racing then get back to me. Even if it doesnt make power extra rev to work with cuts track times...same as increasing slick size to avoid a shift just before the traps to cut your et...
05-17-2013, 10:00 AM
#42
The M5 actually has the S63B44TU 550hp/500tq. I assume he is comparing the LT1 to the N63B44TU 439hp/479tq found in the 550i.
05-17-2013, 10:26 AM
#45
Melting Slicks
05-17-2013, 11:39 AM
#47
Burning Brakes
M5 Sedan
Starting at $90,200 MSRP
22 mpg hwy*
560 horsepower
05-17-2013, 11:42 AM
#48
"More torque at 1,000 RPM than 911 at peak"? That's an eye opener, especially after testing a 2013 C4S yesterday - which was really not bad...different ball park, however, to the 2013 427 1SC I also tried yesterday.
Great post. Didn't know this TV program existed. Do now!
Great post. Didn't know this TV program existed. Do now!
05-17-2013, 11:48 AM
#49
05-18-2013, 06:13 PM
#50
Found this regarding Jordan Lee's comment about comparison of the LT1 and BMW 4.4 TT
2013 BMW 5 Series Overview
The 2013 BMW 5-Series is available with 4-cylinder 528i, 6-cylinder 535i or V8 550i models, as well as with rear-wheel drive or all-wheel drive. 528I models include a turbocharged four making 240 horsepower and 260 pound-feet of torque, with that peak torque achieved at just 1,250 rpm. The turbo six in 535i models makes 300 horsepower and 300 lb-ft, while the twin-turbocharged V8 in the 550i generates 445 hp and 480 lb-ft.
Given the above listed information regarding BMW's 2013 4.4 liter twin-turbo V8 output and Lee's comment in the interview that LT1 makes more torque and a bit more power is on par with GM's reported estimated 450 hp but what I think is interesting is his comment about making more torque (which was not referred to by Lee as a bit more torque but as more torque) so from that comment I would gather that the torque output of the LT1 is somewhere above 480 lb-ft.
The 2013 BMW 5-Series is available with 4-cylinder 528i, 6-cylinder 535i or V8 550i models, as well as with rear-wheel drive or all-wheel drive. 528I models include a turbocharged four making 240 horsepower and 260 pound-feet of torque, with that peak torque achieved at just 1,250 rpm. The turbo six in 535i models makes 300 horsepower and 300 lb-ft, while the twin-turbocharged V8 in the 550i generates 445 hp and 480 lb-ft.
Given the above listed information regarding BMW's 2013 4.4 liter twin-turbo V8 output and Lee's comment in the interview that LT1 makes more torque and a bit more power is on par with GM's reported estimated 450 hp but what I think is interesting is his comment about making more torque (which was not referred to by Lee as a bit more torque but as more torque) so from that comment I would gather that the torque output of the LT1 is somewhere above 480 lb-ft.
05-18-2013, 09:18 PM
#52
Safety Car
Not sure why GM didn't make the 6.2L flex fuel. The gen 5 in all seems to make significantly more power on E85 judging on the 5.3L application:
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
05-19-2013, 12:33 AM
#53
05-19-2013, 07:34 PM
#54
Burning Brakes
part of the reliability testing of all engines includes adding stress. one way of doing this is to run at increased rpm for extended periods. a rev limiter could be raised on sample engines. it would be very time consuming and require huge sample sizes to prove reliability if only nominal conditions were used.
I am not saying that this was what GM was doing when the LT1 was running at 7000 rpm. they may have done this at some other phase of certification than reliability as well. it really doesn't imply anything about peak HP rpm or factory rev limit settings.
I am not saying that this was what GM was doing when the LT1 was running at 7000 rpm. they may have done this at some other phase of certification than reliability as well. it really doesn't imply anything about peak HP rpm or factory rev limit settings.
05-19-2013, 07:40 PM
#55
Race Director
Thread Starter
part of the reliability testing of all engines includes adding stress. one way of doing this is to run at increased rpm for extended periods. a rev limiter could be raised on sample engines. it would be very time consuming and require huge sample sizes to prove reliability if only nominal conditions were used.
I am not saying that this was what GM was doing when the LT1 was running at 7000 rpm. they may have done this at some other phase of certification than reliability as well. it really doesn't imply anything about peak HP rpm or factory rev limit settings.
I am not saying that this was what GM was doing when the LT1 was running at 7000 rpm. they may have done this at some other phase of certification than reliability as well. it really doesn't imply anything about peak HP rpm or factory rev limit settings.
05-19-2013, 07:46 PM
#56
Melting Slicks
Not sure why GM didn't make the 6.2L flex fuel. The gen 5 in all seems to make significantly more power on E85 judging on the 5.3L application:
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
05-20-2013, 02:06 AM
#57
Le Mans Master
Yup. I like having the additional gearing whenever possible, one of my favorite things about the LS7.
In addition to stretching a gear, its possible for the manufacturer to use a shorter gear instead and get to the same MPH as a taller gear, allowing a better mechanical advantage in putting power to the ground.
And lets not forget, the more revs, the better it sounds!
There is a lot to like with 7000rpm.
In addition to stretching a gear, its possible for the manufacturer to use a shorter gear instead and get to the same MPH as a taller gear, allowing a better mechanical advantage in putting power to the ground.
And lets not forget, the more revs, the better it sounds!
There is a lot to like with 7000rpm.
Michael
05-20-2013, 12:31 PM
#58
Not sure why GM didn't make the 6.2L flex fuel. The gen 5 in all seems to make significantly more power on E85 judging on the 5.3L application:
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
91/93 oct: 355HP 383TQ
E85: 380HP 416TQ
25hp , 33tq That's huge. If implemented on the lt1, on E85 + 7000rpm redline would certainly be comparable to the LS7.
To my point earlier... They know the engine can run on E85 but it would threaten Z06 owners if they did. They are just protecting their prized car which I think is a little crazy suggesting it would only help sell the car to younger buyers. Younger people LOVE E85
05-20-2013, 01:29 PM
#59
Le Mans Master
Member Since: Dec 2005
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The previews of the reconfigurable instrumentation show a 6600 rpm redline in every mode including race. This could be part of a cover up regarding redline capability of the LT1 or it may not be. I myself hope that the LT1 has the 7k rpm capability regardless of where peak power is made, IMHO the extra revs make for a more exciting driving experience and race inspired exhaust note. Just my $.02