Are ready for 800, 900, 1000, 1200+ HP? ProCharger has your solution!
07-02-2015, 03:11 PM
#62
Former Vendor
Thread Starter
Guess soon people will find out.
However the A8 is a great upgrade from the A6, and with proper tuning (emphasis on the word "proper") the A6 can handle a lot of HP without failure. So naturally we would expect the A8 to surpass the A6 with ease.
07-02-2015, 05:06 PM
#63
Well, since nobody was going to find out with that little stock blower.
Guess soon people will find out.
However the A8 is a great upgrade from the A6, and with proper tuning (emphasis on the word "proper") the A6 can handle a lot of HP without failure. So naturally we would expect the A8 to surpass the A6 with ease.
Guess soon people will find out.
However the A8 is a great upgrade from the A6, and with proper tuning (emphasis on the word "proper") the A6 can handle a lot of HP without failure. So naturally we would expect the A8 to surpass the A6 with ease.
07-04-2015, 06:45 PM
#64
Instructor
Inner gear is driven, then outer of the same gear set is driven. two ratios are derived from one set of planetaries.
Its a very strong method. Its also why they are able to keep shifts so fast. It simply switchs from the A clutch to the B clutch, much like a PDK on every other shift in between planets.
07-05-2015, 08:59 AM
#66
From my understanding, and someone correct me if Im wrong, but this is much like an allison, where planetary gears are used. Technically, there are only 4 gearsets.
Inner gear is driven, then outer of the same gear set is driven. two ratios are derived from one set of planetaries.
Its a very strong method. Its also why they are able to keep shifts so fast. It simply switchs from the A clutch to the B clutch, much like a PDK on every other shift in between planets.
Inner gear is driven, then outer of the same gear set is driven. two ratios are derived from one set of planetaries.
Its a very strong method. Its also why they are able to keep shifts so fast. It simply switchs from the A clutch to the B clutch, much like a PDK on every other shift in between planets.
This taken from an 8L90 power point presentation.
The 8 speed ratios are generated using:
─
4 planetary gear sets
─
2 brake clutches
─
3 rotating clutches
•
The three (3) rotating clutches have been located forward of the gear sets to
minimize the length of oil feeds which provides for enhanced shift
response
.
•
The 8 speed architecture utilizes a chain driven fluid pump.
Here is the entire presentation, lots of great info. I have read it a few times and each time I learn something different.
http://www.atra.com/Webinars/GM/8L90_Introduction.pdf
Last edited by gonabite; 07-05-2015 at 09:05 AM.
07-05-2015, 06:20 PM
#67
Advanced
ProchargerTech what is the safe power limit of the LT4? Maybe it's too soon to know, but I'm just curious if you can reliably push 1000hp through the LT4.
I'm sure you'd have to upgrade the 7spd's clutch, but hopefully the rest of the car could handle 1000hp safely.
I'm sure you'd have to upgrade the 7spd's clutch, but hopefully the rest of the car could handle 1000hp safely.
07-06-2015, 01:10 AM
#68
According to GM the A8 or 8L90 can handle up to 740 LB.FT of torque.
There's probably a 5% margin of safety built into that figure so another 37 LB-FT or 777 LB-FT of torque total. I would feel safe up to 780 LB-FT and anything above that would reduce the life of the transmission.
There's probably a 5% margin of safety built into that figure so another 37 LB-FT or 777 LB-FT of torque total. I would feel safe up to 780 LB-FT and anything above that would reduce the life of the transmission.
07-06-2015, 11:01 AM
#69
Former Vendor
Thread Starter
We will assume GM did their homework, and took notes from how well factory forged motors like the Toyota 2JZ, and Ford 2003/04 Cobra motors did
07-07-2015, 01:19 PM
#71
Advanced
Since LT-1's are consistently making 700-800rwhp, and living with their none forged internals. Its safe to say this FORGED LT-4 with its lower compression is going to be making a LOT of HP.
We will assume GM did their homework, and took notes from how well factory forged motors like the Toyota 2JZ, and Ford 2003/04 Cobra motors did
We will assume GM did their homework, and took notes from how well factory forged motors like the Toyota 2JZ, and Ford 2003/04 Cobra motors did
07-08-2015, 11:52 AM
#74
great job procharger!
07-08-2015, 05:09 PM
#75
Melting Slicks
Either it'll have blower whine or it'll sound like an NA car.
The 1.7 Supercrapper that's on the car from my understanding doesn't have any blower whine either.
So..either better or the same.
07-09-2015, 07:39 AM
#76
Le Mans Master
According to GM the A8 or 8L90 can handle up to 740 LB.FT of torque.
There's probably a 5% margin of safety built into that figure so another 37 LB-FT or 777 LB-FT of torque total. I would feel safe up to 780 LB-FT and anything above that would reduce the life of the transmission.
There's probably a 5% margin of safety built into that figure so another 37 LB-FT or 777 LB-FT of torque total. I would feel safe up to 780 LB-FT and anything above that would reduce the life of the transmission.
the tires will go up in smoke at 700 ft lbs before the tranny will break
nice job, what's the target price on the intake? beautiful setup and it brings the LT4 top end back where it should be!
anything that makes the Z06 lighter is also a very good thing.
nice job, very impressive!
07-10-2015, 11:15 AM
#77
Former Vendor
Thread Starter
Feel free to upload your car to the gallery over at procharger.com
Thanks guys!
with street tires I think the new 8 spd will last a long life
the tires will go up in smoke at 700 ft lbs before the tranny will break
nice job, what's the target price on the intake? beautiful setup and it brings the LT4 top end back where it should be!
anything that makes the Z06 lighter is also a very good thing.
nice job, very impressive!
the tires will go up in smoke at 700 ft lbs before the tranny will break
nice job, what's the target price on the intake? beautiful setup and it brings the LT4 top end back where it should be!
anything that makes the Z06 lighter is also a very good thing.
nice job, very impressive!
