Tick Performance exaggerated performance claims
#81
100% Redneck
For those that are unfamiliar with HP Tuners... when you compare two different tune files, the tables that show green are different between the two tunes being compared.
Stock 4.8 Idle Airflow File
Op's Tuned File
Stock 4.8 Base Running Idle Airflow (BRAF)
Op's Base Running Idle Airflow (BRAF)
#82
Mod with training wheels
iTrader: (16)
I pulled a 2004 4.8 auto from HP Tuners repository that is "supposedly" stock. I'm seeing the same on VE untouched but on the idle airflow a lot of the idle airflow adaptives are either different factory numbers or the tuner was monkeying with them. The base running idle airflow (BRAF) has been adjusted but my guess is to a "canned" number and not plotted against the idle airflow histogram in the scanner (because correct idle airflow config takes a good amount of time).
Don't forget these guys... GM idle stability requirements actually state that these calibrations alone should be capable of producing a stable idle, spark control disabled. They can also be used in tandem with the throttle follower (stock in the OPs cal) to produce a very sharp tip-in throttle response.
#83
I don't know what part of the world you are in, but the Thorley headers I have on my Express van have held up better than the OEM manifolds which both cracked at ~60K miles. Added alot of torque in the low-midrange right where the engine spends 95% of its time. I put Thorley tri-ys on my old G20 van too when it had a 305. Gave that engine alot more torque as well. Cruising at 70 mph, went from downshifting to 3rd on many uphill pulls to holding overdrive up the same hills. The ones on the Express are CARB approved and I believe the ones they make for the 99-06 trucks are as well. They come with pipes that connect directly to the OEM cats. Tri-ys really help scavenge the cylinders in the low-midrange.
Keep the input coming on the tune. I’m keeping a list to go over with whoever I find for another tuner.
#85
On The Tree
I have been following along this thread and would just add my 2-cents, I have a 2007 4wd crew cab with a 4.8, best upgrade swapping to 4.10 gears. I also have a PCM of NC 93 tune and a cold air intake. My next step is headers down the road since I was told that would be any easy extra ponies with out cracking the motor open.
Gears woke this truck up huge IMO since these engines only move after 3,500-4,000 rpms.
Gears woke this truck up huge IMO since these engines only move after 3,500-4,000 rpms.
#86
TECH Enthusiast
#87
TECH Enthusiast
https://www.summitracing.com/parts/d...silverado-1500
I have seen people knock the tri-ys because they lack some of the top-end hp improvement of a 1-7/8" primary long tube. They fail to look at the average torque gain from say 2,000-5,000 rpm where the tri-ys smoke the standard long tubes and are far more benificial in a truck.
I have seen people knock the tri-ys because they lack some of the top-end hp improvement of a 1-7/8" primary long tube. They fail to look at the average torque gain from say 2,000-5,000 rpm where the tri-ys smoke the standard long tubes and are far more benificial in a truck.
#88
TECH Veteran
iTrader: (5)
Thanks for the link! I didn't say they didn't exist, just that I hadn't seen them.
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint
#89
Thanks for the link! I didn't say they didn't exist, just that I hadn't seen them.
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint
Last edited by 68Formula; 10-31-2021 at 09:15 PM.
#90
TECH Enthusiast
Thanks for the link! I didn't say they didn't exist, just that I hadn't seen them.
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint
You got a dyno graph by chance showing the midrange gained by those? At $800 a set, I can almost buy 2 sets of TSP 1 7/8 equal lengths, so the DTs better come out swinging from a $/tq standpoint