Whipple Gen 4 install w/ JDM 650HP upgrade

[MTF]

Too many factors to say you would need to retune, but typically going one to two steps in size either way, would not require a retune.
I have all three sizes 3.625, 3.500, 3.375
Whipple's Tuner didn't want me to try the 3.250 because I may have to much back pressure and heat, I could possibly ruin the cats.
Keep in mind I only have the Gen 2 compressor, when I upgrade to the Gen 4, I'll have more knowledge.

If your not doing the Oil Pump Gears you will need to play it safe as well.
With JDM's tune and a the smaller Throttle Body ( Twin 65mm TB ) you're probably safe to try smaller pulleys.

I would order the 3.500 if your going to put her on a dyno and check things out.
You can always order more pulley's.

You have to understand Whipple is not going to sell a product that could potentially harm your engine, so they are going to play it safe.
I've been the guinea pig for quite a while in the very beginning, lately I haven't been in the game.
When I do, I will go up to the 3.500 for the first few runs and go back down to the 3.375

 

[KYmxracer52]

Here’s a few pics of the Gen 4 blower w/ manifold. After unboxing this thing, I can definitely see why the rear passenger side bolt is hard to get to.

 

[MTF]

Looking good!!!

Did you order the mechanical boost gauge and adaptor kit from Whipple?

 

[KYmxracer52]

No, I went for the Aeroforce Interceptor since it can monitor several different things. Had to buy their boost sensor kit to see boost. I think it was around $350 for all of it. Should have it by the first of the week. I didn’t realize that Roush had discontinued their vent pods and luckily found a guy on Etsy who makes replicas. Got one for $30.

 

[MTF]

I use https://www.scantool.net/obdlink-mxbt/

It's cool because you can put all the live PIDs up on the screen you want.
Lots of different screens you can use, different size PIDs
I use this as my car cam.

This is one of my video's with the live tracking mode:

 

[KYmxracer52]

That’s really cool looking. I like that you can see so many at once. What kind of screen do you use to display it on?

 

[Landon T]

No, I went for the Aeroforce Interceptor since it can monitor several different things. Had to buy their boost sensor kit to see boost. I think it was around $350 for all of it. Should have it by the first of the week. I didn’t realize that Roush had discontinued their vent pods and luckily found a guy on Etsy who makes replicas. Got one for $30.

I did the same thing. Nice polymer print from that guy.

 

[MTF]

I use my phone in a navigation dock on the windshield.
You can use a tablet too but the App is for Android that I use.
There are other apps for IOS.

Between the BT dongle and the app it's around $75

 

[KYmxracer52]

I use my phone in a navigation dock on the windshield.
You can use a tablet too but the App is for Android that I use.
There are other apps for IOS.

Between the BT dongle and the app it's around $75

That’s not a bad cost at all since you already have the phone.

 

[MTF]

I believe Whipple told me the Gen 4 is worth another 5-8hp.

Whipple does HP numbers for rwhp, so that's like another 15 to 25 at the crank.
I'm liking that! It's going to be a big step for me going from a Gen 2 to a Gen 4.