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Need Upgrade Help Advice (pulley, port, intake, tune injectors, headers)

2595 Views 79 Replies 15 Participants Last post by  Baloney Pony
So I'm fixing to start upgrading my 21 and I have a list of mods I want to do to it. I would like to get some feedback on what I need now vs what can wait to be bought and installed later. I've been reading and it appears that the fuel rails could be added later, and the Gforce axles upgraded later. Anything else I'm missing or other suggestions?

Stainless Works headers2" x 3" headers
Lethal Performance resonator deleteH-Pipe delete
Nitto (front 305/35R20)NT555 G2
Nitto (rear, 315/35R20)NT555 RII
Kong 108mm Throttle Body108 Billet
Injector DynamicsID1300x
NKG Iridium IXLTR7IX-11
Palm Beach Motorsport Heat Exchanger
Whipple Superchargers1" - 1" Intercooler
SPE IC Manifold - Whipple
SPE Thermostat
LP Griptec2.5" Pulley Kit
Gates 8 Rib HD BeltK080670HD
SPE Fuel Rail Kit
Whipple SuperchargersBelt Tensironer
Jokerz PerformanceSC porting
Gforce PerformanceFOR10115A Axles
SPE Vertical Links
Kelltrac IRS Subframe Posi-Loc
Palm Beach Motorsport Tuning
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There's zero room for 93 octane + a 3.25 pulley, you're talking 20lbs or so of boost far surpassing the detonation limits of 93 octane. A 3.7 upper is doable on pump gas and a slight, slight possibly of a 3.6 upper pulley. I'd say the vast majority of tuners are going to shy away from anything +17lbs of boost on 93 pump gas. Engine WILL go BOOM. Pump gas 3.8 upper pulley = yes, 3.7 upper pulley = yes smaller and your crossing into dangerous waters.

For reference: 3.8 upper I'm at 16lbs of boost @ 8000k redline / no cats = less restriction / backpressure = less overall boost. Cats might pump up the boost by 1lb or so with the restriction in the exhaust.
Thabks for that. I’ve added a 3.75 pulley to the list. I was looking at Whipple website and they claim you can make over 1k on 93 at 15lbs of boost. I would love to know what setup they were running.
Thabks for that. I’ve added a 3.75 pulley to the list. I was looking at Whipple website and they claim you can make over 1k on 93 at 15lbs of boost. I would love to know what setup they were running.
I'd say that's accurate what they're figuring

Just as the kit comes 3.8 upper + supporting mods 2in AR headers (no cats) - could be a difference maker not sure & Borla Atak

1030whp @ 8000rpm on E85...
It could obviously make more being revved out further.
(N Texas basically sea level & 75° dyno day)

I didn't want to be revving to the moon. At least until I saw others proven (this one's been done since December) 6-7 months at that time there weren't many out there to bounce information off of.

It's a toy as in most cases here I imagine...
Can say I appreciate the 93oct flexibility (wanting to HPDE on more boost and exclusively to E85 or even short fun drives to me would be incredibly rough stuck on E85)

-Current state a FULL tank of E85 is good for 75-90mi

-93oct I'm able to get 100mi a TANK and can milk it a little more if need be.


On 93 I'm able to not freak out about finding the nearest station to fill up when out having fun.
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Ported allows you to spin a larger pully as compared to stock blower needing the smaller pully to achieve the same HP numbers with less torque.
As I stated earlier, the DCT will hold a lot more than 800TQ. The 800-850 torque number is what should be watched for motor life not DCT.
The DCT will hold above 900. The DCT stage 1 upgrade will hold at 1100TQ and still act/feel like OEM (cost $5,000).
Heck, get a Hellion TT kit, a built motor, a SSP performance DCT stage 1 upgrade, GForce FOR10115A Outlaw Half Shaft Axles and don't look back. 🤣
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As I stated earlier, the DCT will hold a lot more than 800TQ. The 800-850 torque number is what should be watched for motor life not DCT.
I hear what you’re saying but Ken Bjonnes and Sam Lipencott have both publicly stated that the limiting factor for torque is the DCT.
the stock GT500 is damn near perfect IMO.
Yep 🙏
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Made some changes after viewing some videos from Ken at PBD. Went ahead and decided to port the Whipple. Planning to run a 3.75 pulley for 93 tune and a 3.0 pulley for e85. Tuning will be done by Ken.

Has anyone swapped pulleys on their cars themselves? Whipple claims it’s a 3 minute job but can’t seem to verify that.
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Made some changes after viewing some videos from Ken at PBD. Went ahead and decided to port the Whipple. Planning to run a 3.75 pulley for 93 tune and a 3.0 pulley for e85. Tuning will be done by Ken.

Has anyone swapped pulleys on their cars themselves? Whipple claims it’s a 3 minute job but can’t seem to verify that.
I’d call Ken at PBD and ask him, I’m sure they have a solid way to do it.
Made some changes after viewing some videos from Ken at PBD. Went ahead and decided to port the Whipple. Planning to run a 3.75 pulley for 93 tune and a 3.0 pulley for e85. Tuning will be done by Ken.

Has anyone swapped pulleys on their cars themselves? Whipple claims it’s a 3 minute job but can’t seem to verify that.
It only takes like 3-5 minutes. This video will give you an idea, he replaces the pully and belt, but it shows Ken swapping the pully at the beginning.
* This is a stock SC and a SPE pully (not whipple).
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I'm at the mercy of the factory and extended warranty. Whipple is definitely the route I would like to take when I start upgrading mine but it it's in your face as soon as you pop the hood and I believe the kit requires shorter motor mounts. Discrete will be my approach.
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I'm at the mercy of the factory and extended warranty. Whipple is definitely the route I would like to take when I start upgrading mine but it it's in your face as soon as you pop the hood and I believe the kit requires shorter motor mounts. Discrete will be my approach.
Nobody can see a ported blower lol.
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Well I found out today if I want to run the 3.0 pulley I’m going to have to swap belts every time. Stock pulley and 3.75 use the same belt but to go to a 3.0 takes a new belt. 🙄🙄
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Well I found out today if I want to run the 3.0 pulley I’m going to have to swap belts every time. Stock pulley and 3.75 use the same belt but to go to a 3.0 takes a new belt. 🙄🙄
Why not go twin turbo? Less maintenance and better gas mileage. No belts to replace, no pully swap, less stress on the motor. You can change boost level with the boost gauge in like 3 seconds.
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Why not go twin turbo? Less maintenance and better gas mileage. No belts to replace, no pully swap, less stress on the motor. You can change boost level with the boost gauge in like 3 seconds.
Well honestly I never thought about a TT setup but it’s peaked my interest now.
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Well honestly I never thought about a TT setup but it’s peaked my interest now.
Well honestly I never thought about a TT setup but it’s peaked my interest now.
Hellion 2020+ Ford Mustang Shelby GT500 Sleeper Hidden Twin Turbo System - Hellion Turbo
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I’m assuming I could make some decent power with it depending on the turbo sizes. Anyone happen to know what power is being made with each turbos?
I’m assuming I could make some decent power with it depending on the turbo sizes. Anyone happen to know what power is being made with each turbos?
There is information out there. PBD has a few TT videos, heck even Kem moved to the Hellion kit after he tuned the first 2020Hellion GT500.
Most folks go with the Hellion 64'66R T4 twin turbos. Large turbos take a bit longer to produce boost and smaller turbos have less room for growth.
If you tell Ken that you are thinking about the Hellion kit I bet he will get excited...

Stock engine and DCT in video (video is almost 2 years old). He has since gotten the TT down to almost perfection.

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I’m assuming I could make some decent power with it depending on the turbo sizes. Anyone happen to know what power is being made with each turbos?
I bet Ken at PBD knows lol. Their base 62mm turbos can make 1K or more.
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I bet Ken at PBD knows lol. Their base 62mm turbos can make 1K or more.
Looks like I’ll be setting up another call with him. I was about to pull the trigger on the whipple next week until I heard about the belt change.
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After some back and fourth this morning with PBD, I think I’m going to stick with the ported whipple setup. The TT was going to be another $10k before install over that of the whipple.

Going to go with a 3.65 pulley for 93 tune and step down to a 3.5 for e85 tune. The e85 with the ported blower should get my close if not just over the 1100rwhp mark. Luckily they both use the same belt so a simple pulley swap will be as easy as taking out the 5 bolts.

Anyone happen to know what the drivetrain % loss is on these cars? So say if you make 1100rwhp what’s the HP at the crank?
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After some back and fourth this morning with PBD, I think I’m going to stick with the ported whipple setup. The TT was going to be another $10k before install over that of the whipple.

Going to go with a 3.65 pulley for 93 tune and step down to a 3.5 for e85 tune. The e85 with the ported blower should get my close if not just over the 1100rwhp mark. Luckily they both use the same belt so a simple pulley swap will be as easy as taking out the 5 bolts.

Anyone happen to know what the drivetrain % loss is on these cars? So say if you make 1100rwhp what’s the HP at the crank?
To make 1100 whp i would guess you need 1170-1200 at the crank …..
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