NNBS 4.8 Dyno results
12-01-2011, 10:21 PM
#1
TECH Apprentice
Thread Starter
NNBS 4.8 Dyno results
Well I haven't seen any nnbs 4.8 dyno numbers so I dont know how my truck compares to other 4.8's but the tuner said it would probably make 280rwhp cause of my 22's and shitty drive shaft. Truck is in the sig. He just emailed me this--
Allen,
Your truck is done and it turned out to be quite a monster on the dyno during tuning. It churned out 306 RWHP in 2nd gear (3rd gear is too tall and with a stock steel driveshaft going 130+mph is not advised on a dyno). In 3rd gear that equates to roughly 330 RWHP. This is equal to roughly 396 HP at the crank. Great Job! Drivability is awesome and it pulls all the way up to 7000 RPM . Shift points are set at 6900 RPM, I don't know how long the transmission will live at those RPMs but I would hope that would be good enough for mid 14s.
Another very important thing, it would have done better with the stock MAF sensor instead of the JET sensor, it is messing with the a/f a little on the top end. Do you still have it? If you find it, clean it, reinstall it, and Nic will have to touch it up. It will cost a little to touch it up but would be worth it later on in my opinion.
Allen,
Your truck is done and it turned out to be quite a monster on the dyno during tuning. It churned out 306 RWHP in 2nd gear (3rd gear is too tall and with a stock steel driveshaft going 130+mph is not advised on a dyno). In 3rd gear that equates to roughly 330 RWHP. This is equal to roughly 396 HP at the crank. Great Job! Drivability is awesome and it pulls all the way up to 7000 RPM . Shift points are set at 6900 RPM, I don't know how long the transmission will live at those RPMs but I would hope that would be good enough for mid 14s.
Another very important thing, it would have done better with the stock MAF sensor instead of the JET sensor, it is messing with the a/f a little on the top end. Do you still have it? If you find it, clean it, reinstall it, and Nic will have to touch it up. It will cost a little to touch it up but would be worth it later on in my opinion.
12-01-2011, 10:30 PM
#3
TECH Apprentice
Thread Starter
thanks a lot. yeah I almost bought an obs but this one came around for a good deal and my dad helped me out! it seems like there isnt many rcsb sierras around compared to the silverado ha
12-01-2011, 10:43 PM
#4
TECH Apprentice
Thread Starter
I'm taking it to the track here pretty soon on stock 17's. im hoping for AT LEAST a 14.5. Its never been ran before and im really not sure what its capable of..
