stang17
Well-Known Member
- Joined
- Jun 5, 2016
- Threads
- 24
- Messages
- 554
- Reaction score
- 195
- Location
- Wilkes Barre, PA
- Vehicle(s)
- 2017 GT Premium PP
- Thread starter
- #1
Hey guys, been awhile since I posted anything. Just wanted to let you know that I found the limits of an 11:1 aluminator.
My stock motor failed at 12,800 miles from a snapped crankshaft snout. It was supercharged from day 1 with a whipple gen 2 stage 2.
I ended up going with an 11:1 aluminator and adding a MFP crank support. I decided to go "all in" for a max effort pump gas build and purchased DW 95 lb injectors, BAP, calimer stage 3 MT-82, RXT 1200 HD clutch, and PBD tune while the new motor was getting installed.
Everything was put together August 2019 and proceeded to put a few hundred miles on the car before making the power pulls and remote dyno tuning.
With a 3.5 pulley and 96 octane ( 93 plus a bottle of boostane shot) PBD was able to tune me to the likes of 819 whp and 608 ft lbs.
Car drove great and was able to get me into the 9s and 138 mph at 4120 lb race weight.
6,000 miles later I put the car back on the same dyno and only make 764 whp and 556 ft lbs.
I proceeded to pull the plugs and do a compression and leak down test.
Compression / leak down was as follows
Cylinder 5 - 200 leak down test 82/100 psi
Cylinder 6 - 230 leak down test 88/100 psi
Cylinder 7 - 195 leak down test 80/100 psi
Cylinder 8 - 205 leak down test 70/100 psi
Cylinder 1 - 227 leak down test 99/100 psi
Cylinder 2 - 225 leak down test 92/100 psi
Cylinder 3 - 200 leak down test 86/100 psi
Cylinder 4 - 200 leak down test 72/100 psi
I proceed to pull the motor and have it shipped to Ford Performance in hopes of being covered under the 24 month, 24,000 mile warranty.
Attached is the copy of the inspection report.
I was told by PBD that I would be able to run as low as a 3.325 pulley with my 21.5 timing tune on 96 octane fuel.
I never went smaller than the 3.5 pulley because I didn't want the hassle of having to change to a different size belt.
Every dyno pull and 1/4 mile pass over the past year has been data logged and all logs consistently show 0 knock. No -/+ , just 0.
My original PBD tunes were showing knock even at 16 degrees and partial throttle. PBD was convinced the knock was false, made some type of revision (don't know what because tune is locked) and all knock went away.
I trust PBD and them giving me 21+ timing for use with 96 octane as I don't believe they would give me anything they didn't consider safe.
My question is why wouldn't any of my logs show knock when apparently there was a considerable amount of detonation going on ( see attached picture)?
Also, has anyone else had head gasket failures at 800 + hp?
I'm not throwing any shade at PBD, but just wanted to share my experience. PBD has been great to me over the past 2 years and I have no complaints with their customer service or response times.
Currently, the motor is at Holbrook Racing Engines who is working on getting me a quote for repair.
My stock motor failed at 12,800 miles from a snapped crankshaft snout. It was supercharged from day 1 with a whipple gen 2 stage 2.
I ended up going with an 11:1 aluminator and adding a MFP crank support. I decided to go "all in" for a max effort pump gas build and purchased DW 95 lb injectors, BAP, calimer stage 3 MT-82, RXT 1200 HD clutch, and PBD tune while the new motor was getting installed.
Everything was put together August 2019 and proceeded to put a few hundred miles on the car before making the power pulls and remote dyno tuning.
With a 3.5 pulley and 96 octane ( 93 plus a bottle of boostane shot) PBD was able to tune me to the likes of 819 whp and 608 ft lbs.
Car drove great and was able to get me into the 9s and 138 mph at 4120 lb race weight.
6,000 miles later I put the car back on the same dyno and only make 764 whp and 556 ft lbs.
I proceeded to pull the plugs and do a compression and leak down test.
Compression / leak down was as follows
Cylinder 5 - 200 leak down test 82/100 psi
Cylinder 6 - 230 leak down test 88/100 psi
Cylinder 7 - 195 leak down test 80/100 psi
Cylinder 8 - 205 leak down test 70/100 psi
Cylinder 1 - 227 leak down test 99/100 psi
Cylinder 2 - 225 leak down test 92/100 psi
Cylinder 3 - 200 leak down test 86/100 psi
Cylinder 4 - 200 leak down test 72/100 psi
I proceed to pull the motor and have it shipped to Ford Performance in hopes of being covered under the 24 month, 24,000 mile warranty.
Attached is the copy of the inspection report.
I was told by PBD that I would be able to run as low as a 3.325 pulley with my 21.5 timing tune on 96 octane fuel.
I never went smaller than the 3.5 pulley because I didn't want the hassle of having to change to a different size belt.
Every dyno pull and 1/4 mile pass over the past year has been data logged and all logs consistently show 0 knock. No -/+ , just 0.
My original PBD tunes were showing knock even at 16 degrees and partial throttle. PBD was convinced the knock was false, made some type of revision (don't know what because tune is locked) and all knock went away.
I trust PBD and them giving me 21+ timing for use with 96 octane as I don't believe they would give me anything they didn't consider safe.
My question is why wouldn't any of my logs show knock when apparently there was a considerable amount of detonation going on ( see attached picture)?
Also, has anyone else had head gasket failures at 800 + hp?
I'm not throwing any shade at PBD, but just wanted to share my experience. PBD has been great to me over the past 2 years and I have no complaints with their customer service or response times.
Currently, the motor is at Holbrook Racing Engines who is working on getting me a quote for repair.
Sponsored