Track Night testing for the 5.0
05-07-2014, 12:06 AM
#1
Blown Member
Thread Starter
Track Night testing for the 5.0
Last Thursday night I went to the track in my 2013 STX RCSB 5.0 and the weather was perfect to run. The track prep was great. I never spun that I know of and the consistent 60' times prove that out. I wasn't there to cut a perfect light. I just wanted a perfect launch and let everything else take care of itself.
I had Lakewood traction bars and 20" FX wheels with factory Bridgestone 275/55/20 tires a with 3.55 limited slip rear end. These tires are wider and bigger that the POS Pirelli factory tires. These wheels and tires are heavy at 92lbs each. I bet my factory 18" wheels and tires weighted 70lbs or less each. I guarantee the 20s had a penalty of 2 tenths of a second or maybe a touch more. The 20" combo is also 32 inches tall where the 18" combo is a hair under 30 inches tall which changes the gear ratio. The 20s look great being more than an inch wider and filling up the wheel well better being 2 inches taller so they are not coming off.
Traction control and Advanced Trac were turned off on all runs. I had 93 octane in the tank and for the start to this testing I put the truck tune back to stock. I made 2 passes stock and then 2 passes on each tune until all were tested. These are just straight up runs with no BS and not meant to start a pissing match. There will be honest commentary about factors with each tune.
Stock Times:
SSI 93 Octane T4: (This tune had stock shift points 6000(1-2) 5800(2-3))
The shift points could not be changed even by SCT when using my stock strategy code. Worked with SCT for 2 months and they could not do it.
I had Lakewood traction bars and 20" FX wheels with factory Bridgestone 275/55/20 tires a with 3.55 limited slip rear end. These tires are wider and bigger that the POS Pirelli factory tires. These wheels and tires are heavy at 92lbs each. I bet my factory 18" wheels and tires weighted 70lbs or less each. I guarantee the 20s had a penalty of 2 tenths of a second or maybe a touch more. The 20" combo is also 32 inches tall where the 18" combo is a hair under 30 inches tall which changes the gear ratio. The 20s look great being more than an inch wider and filling up the wheel well better being 2 inches taller so they are not coming off.
Traction control and Advanced Trac were turned off on all runs. I had 93 octane in the tank and for the start to this testing I put the truck tune back to stock. I made 2 passes stock and then 2 passes on each tune until all were tested. These are just straight up runs with no BS and not meant to start a pissing match. There will be honest commentary about factors with each tune.
Stock Times:
SSI 93 Octane T4: (This tune had stock shift points 6000(1-2) 5800(2-3))
The shift points could not be changed even by SCT when using my stock strategy code. Worked with SCT for 2 months and they could not do it.
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Sweatmachine (05-18-2014)
05-07-2014, 12:14 AM
#2
Blown Member
Thread Starter
Part 2
MPT 93 octane Street Shift: (Shifts were at 6400 in all gears (they used a different strategy code and it worked)).
MPT 93 Octane Race Shift: (When I tested it on the street my shifts were at 6700 but at the track it didn't seen any higher than the street shift. I even forced a download before the second pass and the same result.)
MPT 93 octane Street Shift: (Shifts were at 6400 in all gears (they used a different strategy code and it worked)).
MPT 93 Octane Race Shift: (When I tested it on the street my shifts were at 6700 but at the track it didn't seen any higher than the street shift. I even forced a download before the second pass and the same result.)
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Sweatmachine (05-18-2014)
05-07-2014, 12:50 AM
#3
Blown Member
Thread Starter
As you can see being brake torqued up to 1600rpm to launch resulted in a touch better 60' times than 1200rpm.
I did a short burnout on each run to make sure the tires were heated. A burnout helps with street tires but going crazy with it doesn't really help like with slicks. I got quite good at prepping and launching on street tires over the years with the Lightning.
I feel that with the stock wheels and tires this truck could have broken into the 13 second range with just the tune, K&N filter panel in the stock box and resonator/muffler deleted with 3" pipe and a Magnaflow muffler in place.
This truck the way it sits runs basically the same times stock and with a tune as my wife's 87 Grand National did years ago. The GN ran 14.8 stock and 14.2 with a tune and test pipe (catalytic converter delete).
I did a short burnout on each run to make sure the tires were heated. A burnout helps with street tires but going crazy with it doesn't really help like with slicks. I got quite good at prepping and launching on street tires over the years with the Lightning.
I feel that with the stock wheels and tires this truck could have broken into the 13 second range with just the tune, K&N filter panel in the stock box and resonator/muffler deleted with 3" pipe and a Magnaflow muffler in place.
This truck the way it sits runs basically the same times stock and with a tune as my wife's 87 Grand National did years ago. The GN ran 14.8 stock and 14.2 with a tune and test pipe (catalytic converter delete).
05-07-2014, 01:02 AM
#4
Senior Member
Great improvements! A set of long bars, lighter wheels and I'm sure it would be in the 13s. Which is pretty impressive for the tiny amount if mods you have.
Have you logged you runs? If so, send them back to MPT and see if there is anything left in the tune.
I'd also be interested what a tune would do from them setup for E85.
Wayne
Have you logged you runs? If so, send them back to MPT and see if there is anything left in the tune.
I'd also be interested what a tune would do from them setup for E85.
Wayne
05-07-2014, 01:45 AM
#5
I had Lakewood traction bars and 20" FX wheels with factory Bridgestone 275/55/20 tires a with 3.55 limited slip rear end. These tires are wider and bigger that the POS Pirelli factory tires. These wheels and tires are heavy at 92lbs each. I bet my factory 18" wheels and tires weighted 70lbs or less each. I guarantee the 20s had a penalty of 2 tenths of a second or maybe a touch more. The 20" combo is also 32 inches tall where the 18" combo is a hair under 30 inches tall which changes the gear ratio. The 20s look great being more than an inch wider and filling up the wheel well better being 2 inches taller so they are not coming off.
Last edited by jgiddy; 05-07-2014 at 02:32 AM.
05-07-2014, 02:17 AM
#6
Senior Member
Now I really need to take my truck to the track. I have the SCrew, but the same running gear and engine as you. I'm wondering how much the added weight will effect it. I'm thinking at least a half to 3/4 of a second slower than you stock. Awesome comparison and nice runs.
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05-07-2014, 11:32 AM
#10
Senior Member
Great right up. I did something similar on different occasions. Found that MPT93 track shifting and 5* 93 race tune were VERY close in times. Within .009 tenths. All of your times correspond with how my RCSB ran when I had the 20" FX wheels on it. I tried going after I put the stock 18's back on but got rained out.
