My large frame front mount project with two videos
Jul 26, 2009 | 11:22 PM
#404
I hate my 4l80e right now because of boost lag. I didn't have any boost lag with 4l60e. So let know what happens.
Jul 30, 2009 | 02:47 AM
#406
TECH Veteran
Joined: Sep 2003
Posts: 4,534
Likes: 3
From: Las Vegas, NV
Holy crap that cam does have late timing. You're having a cylinder filling issue that really only the boost and some rpm can fill. With your compression and a small cam like you have it should be great. I would have a cam ground with better valve timing and that should fix it. I agree that the tall first gear and the large turbo make for a slow spool. Lots of load helps spool, but rpm moves more air and helps it more which is why the 60E helps spool time. A 2 step will likely help, but not so much on the street.
Jul 30, 2009 | 09:38 AM
#407
Thread Starter
How do I change this text
iTrader: (26)
Joined: Jan 2005
Posts: 7,294
Likes: 2
From: Behind the TIG welder
Holy crap that cam does have late timing. You're having a cylinder filling issue that really only the boost and some rpm can fill. With your compression and a small cam like you have it should be great. I would have a cam ground with better valve timing and that should fix it. I agree that the tall first gear and the large turbo make for a slow spool. Lots of load helps spool, but rpm moves more air and helps it more which is why the 60E helps spool time. A 2 step will likely help, but not so much on the street.
