Whipple Gen 3 what boost?

[Daryl333]

I just purchased a Whipple Gen 3 2.9L Stage 2.
Came with: Larger Heat Exchanger, 132 TB, ID1050s, 3.750" Pulley. Boosta Pump.
I have ARH Catted Longtubes
I'm in Canada and our gas is really terrible compared to US.
But we've just been introduced to Shell Vpower 93. Which has been tested on a dyno same car,same day etc to be better than Chev 94. Best in the Province.
VMP has said he 'should' be able to tune for this pulley. Won't know results till he sees logs of course.
This size pulley is 1.5 lb of boost more than suggested by Whipple charts per 91 tune.
My question is because I have longtubes will this make up for the small difference in octane verses boost? I searched but closest I can find is this.(pic)I'm trying to find info in advance in case I have to buy a larger pulley. Plus I need to learn this stuff.
Thx.

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[2022 Mach 1]

I just purchased a Whipple Gen 3 2.9L Stage 2.
Came with: Larger Heat Exchanger, 132 TB, ID1050s, 3.750" Pulley. Boosta Pump.
I have ARH Catted Longtubes
I'm in Canada and our gas is really terrible compared to US.
But we've just been introduced to Shell Vpower 93. Which has been tested on a dyno same car,same day etc to be better than Chev 94. Best in the Province.
VMP has said he 'should' be able to tune for this pulley. Won't know results till he sees logs of course.
This size pulley is 1.5 lb of boost more than suggested by Whipple charts per 91 tune.
My question is because I have longtubes will this make up for the small difference in octane verses boost? I searched but closest I can find is this.(pic)I'm trying to find info in advance in case I have to buy a larger pulley. Plus I need to learn this stuff.
Thx.

A 3.75 pulley on a gen 3 resulted in10 to 10.5 lbs of boost. It wasnt until the 2.9 gen 4 or 3L gen 5 that the moved to a 3.875 pulley to get the desired 10 to 10.5 lbs of boost

 

[Daryl333]

So this graph is for a
gen 4 - 5?
If so I'm good then?

 

[DRKHORS]

This is the Gen 5 chart:

 

[2022 Mach 1]

Here is the whipple recommended octane injectors and pully size for a 2015 to 2017 gen3 as well. You should have no issues

 

[Daryl333]

Here is the whipple recommended octane injectors and pully size for a 2015 to 2017 gen3 as well. You should have no issues

[/QUOTE Seems I was reading the wrong boost/pulley chart. I guess the guy that sold the kit to me added the larger injectors and pump because he had visions or more HP in the future.
Thx for clearing that up for me. 10.5lbs will be ideal for what I want to accomplish.

What I'm wondering is what effect longtubes will have.
They won't push the performance past my Octane limits?
How does that work?

 

[jayman33]

You’ll be fine with that pulley on 91 octane.

 

[Daryl333]

You’ll be fine with that pulley on 91 octane.

I actually just found out our Shell 93 (Canada) is equal to most US 91 so that's a plus. It's not like I don't trust the tune company I just like to know what's going on. And it's all new to me as well.
So thx.

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