Help reaching 900rwhp - what to add next

[engineermike]

@vtknight, I agree but have a slightly different viewpoint. My basic premise is that oem parts are “better” than aftermarket parts. Oem parts have tons more r&d, testing, and validation, are generally more reliable with less nvh as to boot. Aftermarket parts, more often than not, just suck in long term durability, batch-to-batch consistency, and reliability. When possible, I would rather upgrade to repurposed oem parts like the hellcat fuel pump or boss tensioners, for example. This isn’t true in every case, but I definitely don’t assume all aftermarket parts are oem quality.

In the case of the 10 rib, I believe that replaces the stock damper, which we believe plays into the harmonics of the crank which has contributed to opg failures. When replacing the damper, I get worried that the mass and damping of the new unit is properly matched. Maybe it’s fine; I just don’t know.

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[vtknight]

@vtknight, I agree but have a slightly different viewpoint. My basic premise is that oem parts are “better” than aftermarket parts. Oem parts have tons more r&d, testing, and validation, are generally more reliable with less nvh as to boot. Aftermarket parts, more often than not, just suck in long term durability, batch-to-batch consistency, and reliability. When possible, I would rather upgrade to repurposed oem parts like the hellcat fuel pump or boss tensioners, for example. This isn’t true in every case, but I definitely don’t assume all aftermarket parts are oem quality.

In the case of the 10 rib, I believe that replaces the stock damper, which we believe plays into the harmonics of the crank which has contributed to opg failures. When replacing the damper, I get worried that the mass and damping of the new unit is properly matched. Maybe it’s fine; I just don’t know.

Understood and I very much agree actually. One GTR Shop for example did not sleeve their engines initially because the original Nissan design was superior for longevity. That changed as power levels increased however. It also changed due to both direct (intentional) and indirect (somewhat unintentional - cars blowing up etc.) testing of the platform continued. I think there are certain things I would enhance as an oem part until I am confident of the value of the aftermarket component - and others like fueling mods - that I would do fairly immediately if it is from a trusted 3rd party vendor. The 10 rib/balancer has been pretty intensively tested from my own research (directly by Whipple) and on many many builds successfully - I also don't know 100% (with anything really - this is racing/modding) -but I have pretty solid confidence there.

 

[andrewtac]

Very different setup (paxton) but I just pputut on a grip tech today. I did not have slip prior, and wasn't expecting it (3.6 to 3.48). However, the griptech has a hub which will make future pulley changes much easier. I had to loosen the paxton to get the original off, heat it and so on. Now, 6 small allen screws on the hub, it will be much quicker. I know the setup is different, but something else you'll gain from the griptech.

 

[olaosunt]

Hey guys,

I am running a 17 mustang (manual) with a Gen 5 3.0 Whipple (stage 2) on stock 6 rib as well as pump E85. I am looking to be in the ball park of 900+ Rwhp and was wondering if I could get your input on what to do next. I have the supporting mods (axles, driveshaft, got new tranny on way, oil pump gears, wheels)

I was thinking of going with the Whipple 10 rib kit with the 20OD and 3.6 pulley. I was told this should get me close if not there. This option however would be another 1800$...

Another option someone mentioned is to buy a smaller pulley from Griptec like a 3.5/3.375 which would be $200 or so value compared to the $1800 and saves me from any trouble of installing a 20OD.

Can anyone with any personal knowledge enlighten me on which route is best to take. I was going to pull the trigger on the 10 rib kit and the 20OD but put it on hold until I get more feedback as I also read there some issues that come with the 20OD(can anyone explain of any issues that can come from having the 20OD?).

Not sure about the 15-17 motors but the 6 rib on the 18+ has repeatedly , on different non shop cars made north of 900 .
Here is mine .
2.75 pulley is north of 950 .I will See what it runs .
I already do have all the parts for a 10 rib/20 OD including the alternator relocation kit / cobra jet idlers plate and considering the cobra jet lid and ice tank since I expect more heat with additional boost .
plan is to do the 10 rib when I swap in new motor and trans.

https://www.mustang6g.com/forums/threads/another-gen-5-whipple-thread.120128/page-13

@HRSEPLA has also gone 9.0@154 with the 2.875 pulley .
https://www.mustang6g.com/forums/th...-3-0-a10-9-0-154mph-on-a-6-rib-pulley.127141/

@Jed S. also comes to mind .
He went 9.3@153 on the 3.25 6 rib
https://www.mustang6g.com/forums/threads/1-4-mile-fast-list-3-0.153049/#post-3121021

... and another one
@Peedystablo82
https://www.mustang6g.com/forums/th...0-whipple-gen-5-vs-turbo.142202/#post-2913563

 

[vtknight]

Not sure about the 15-17 motors but the 6 rib on the 18+ has repeatedly , on different non shop cars made north of 900 .
Here is mine .
2.75 pulley is north of 950 .I will See what it runs .
I already do have all the parts for a 10 rib/20 OD including the alternator relocation kit / cobra jet idlers plate and considering the cobra jet lid and ice tank since I expect more heat with additional boost .
plan is to do the 10 rib when I swap in new motor and trans.

https://www.mustang6g.com/forums/threads/another-gen-5-whipple-thread.120128/page-13

@HRSEPLA has also gone 9.0@154 with the 2.875 pulley .
https://www.mustang6g.com/forums/th...-3-0-a10-9-0-154mph-on-a-6-rib-pulley.127141/

@Jed S. also comes to mind .
He went 9.3@153 on the 3.25 6 rib
https://www.mustang6g.com/forums/threads/1-4-mile-fast-list-3-0.153049/#post-3121021

... and another one
@Peedystablo82
https://www.mustang6g.com/forums/th...0-whipple-gen-5-vs-turbo.142202/#post-2913563

Sam has been kind to share his experiences on his build - very knowledgeable guy. He is running a pretty complete setup and has been very consistent. I think he was about to change over to the 10 rib but ended up focusing on his Foxbody Coyote Gen V. He pushed his 6 rib really well.

 

[aedfam]

Not sure about the 15-17 motors but the 6 rib on the 18+ has repeatedly , on different non shop cars made north of 900 .
Here is mine .
2.75 pulley is north of 950 .I will See what it runs .
I already do have all the parts for a 10 rib/20 OD including the alternator relocation kit / cobra jet idlers plate and considering the cobra jet lid and ice tank since I expect more heat with additional boost .
plan is to do the 10 rib when I swap in new motor and trans.

https://www.mustang6g.com/forums/threads/another-gen-5-whipple-thread.120128/page-13

@HRSEPLA has also gone 9.0@154 with the 2.875 pulley .
https://www.mustang6g.com/forums/th...-3-0-a10-9-0-154mph-on-a-6-rib-pulley.127141/

@Jed S. also comes to mind .
He went 9.3@153 on the 3.25 6 rib
https://www.mustang6g.com/forums/threads/1-4-mile-fast-list-3-0.153049/#post-3121021

... and another one
@Peedystablo82
https://www.mustang6g.com/forums/th...0-whipple-gen-5-vs-turbo.142202/#post-2913563

What fuel type is required for these pulleys? Will I be ok with pump E ok? According to Whipple any pulley smaller than 3.5" requires 104 octane or higher? So would I be good with pump E and say a 3.125 pulley ?

 

[Cory S]

What fuel type is required for these pulleys? Will I be ok with pump E ok? According to Whipple any pulley smaller than 3.5" requires 104 octane or higher? So would I be good with pump E and say a 3.125 pulley ?

Will all depend on how much spark advance is commanded. I can run up to 15psi on 93/Boostane mix up to 18.5° with around a 99-100 octane blend.

 

[aedfam]

Not sure about the 15-17 motors but the 6 rib on the 18+ has repeatedly , on different non shop cars made north of 900 .
Here is mine .
2.75 pulley is north of 950 .I will See what it runs .
I already do have all the parts for a 10 rib/20 OD including the alternator relocation kit / cobra jet idlers plate and considering the cobra jet lid and ice tank since I expect more heat with additional boost .
plan is to do the 10 rib when I swap in new motor and trans.

https://www.mustang6g.com/forums/threads/another-gen-5-whipple-thread.120128/page-13

@HRSEPLA has also gone 9.0@154 with the 2.875 pulley .
https://www.mustang6g.com/forums/th...-3-0-a10-9-0-154mph-on-a-6-rib-pulley.127141/

@Jed S. also comes to mind .
He went 9.3@153 on the 3.25 6 rib
https://www.mustang6g.com/forums/threads/1-4-mile-fast-list-3-0.153049/#post-3121021

... and another one
@Peedystablo82
https://www.mustang6g.com/forums/th...0-whipple-gen-5-vs-turbo.142202/#post-2913563

So for the 10 rib kit I will also need a alternator relocations kit on a 17 mustang ?

 

[jbanh100]

10-rib regret doing that when my car was whipple supercharged.

 

[aedfam]

10-rib regret doing that when my car was whipple supercharged.

Why is that?

 

[jbanh100]

Why is that?

It's more convenient if you want to grow into big boy power. Sure you can always pulley down on your 6-rib but you run risk of belt slip, griptec can solve that but for how long...

 

[aedfam]

It's more convenient if you want to grow into big boy power. Sure you can always pulley down on your 6-rib but you run risk of belt slip, griptec can solve that but until how long...

Ok, so you do recommend the 10 rib? I thought you were stating that you regret going with the 10 rib when you were Whippled.

 

[aedfam]

What boost are you seeing now, and is the belt slipping? Grip-Tec pullies are great.... You can "usually" make it to around 16-16.5psi on a 6-rib Grip-tec before slip.

Sorry I got to this reply late. Right now I'm seeing maybe 10/11 pounds of boost with a 3.875 pulley. I was thinking of getting a lower pulley to get me to around that area (16 psi) as my engine is still stock so I don't want threw a crazy amount of boost on it. I may get a griptech pulley and what it can do. And if I experience any belt slip.

 

[Cory S]

Sorry I got to this reply late. Right now I'm seeing maybe 10/11 pounds of boost with a 3.875 pulley. I was thinking of getting a lower pulley to get me to around that area (16 psi) as my engine is still stock so I don't want threw a crazy amount of boost on it. I may get a griptech pulley and what it can do. And if I experience any belt slip.

Go for a Grip-Tec. I run a 3” pulley now with zero slip. Just make sure your belt isn’t too short and your tensioner has stroke left.

 

[vtknight]

Ok, so you do recommend the 10 rib? I thought you were stating that you regret going with the 10 rib when you were Whippled.

So did I lol...

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