[JSH]

Originally Posted by Evansa22

Really couldn't answer that for sure, my builder told me lower is better for the reasons stated. You would probably be fine i just can't answer definitively. Car will be a hoot either way. Also that seems to be pretty good price for the mods imo

JSH, almost 100% sure 2.5 is stock size upper because they put a griptec pulley on the blower while it was getting ported and I told them I wanted stock size.

Yea, I believe 2.5" is OEM dia. We put a 2.4" on my KongX last fall thinking OEM was 2.35", so rather than slowing down the blower we sped it up

But, the diameter of the OEM lower pulley remains under debate. I believe it's either 7.87 or 8"

[Camaroking98]

Originally Posted by Evansa22

Really couldn't answer that for sure, my builder told me lower is better for the reasons stated. You would probably be fine i just can't answer definitively. Car will be a hoot either way. Also that seems to be pretty good price for the mods imo

JSH, almost 100% sure 2.5 is stock size upper because they put a griptec pulley on the blower while it was getting ported and I told them I wanted stock size.

im pumped...really hoping 700+whp from other similar builds thats what im seeing

[Evansa22]

Originally Posted by JSH

Yea, I believe 2.5" is OEM dia. We put a 2.4" on my KongX last fall thinking OEM was 2.35", so rather than slowing down the blower we sped it up

But, the diameter of the OEM lower pulley remains under debate. I believe it's either 7.87 or 8"

I have the stock lower pulley somewhere in the garage, pretty sure it's 8". Here's a list from ati on their pulleys for reference

[Evansa22]

Originally Posted by Camaroking98

im pumped...really hoping 700+whp from other similar builds thats what im seeing

Uncorrected at your elevation, not sure you'll see that, but interested to see the results. Hope you hit your mark and are happy with the results!

[JSH]

Originally Posted by Evansa22

I have the stock lower pulley somewhere in the garage, pretty sure it's 8". Here's a list from ati on their pulleys for reference

In my calcs for sizing the upper for my coming 2650, I used OEM 8" and 8.8" as my current "10% lower."

[Gunkk]

Originally Posted by Camaroking98

Any guestimates on power from your guys experience?

Not sure a completely stock fuel system on 91 can get 650whp at altitude, even with the overdriven blower. However... presuming the cam kit includes the extra lobe for the HPFP, you can probably get to whatever the stock LP pump and injectors can give. Easy enough to add a JMS until you hit the injector limit, and then you can always drop the coin for the +30s or whatever later. Suggest you confirm which fuel lobe they're doing and what the implications are for you down the road.

What are you going to use the car for, and is MAT & intercooling going to be an issue for you?

[CW3SF]

Originally Posted by Gunkk

Not sure a completely stock fuel system on 91 can get 650whp at altitude, even with the overdriven blower. However... presuming the cam kit includes the extra lobe for the HPFP, you can probably get to whatever the stock LP pump and injectors can give. Easy enough to add a JMS until you hit the injector limit, and then you can always drop the coin for the +30s or whatever later. Suggest you confirm which fuel lobe they're doing and what the implications are for you down the road.

What are you going to use the car for, and is MAT & intercooling going to be an issue for you?

My stock fuel system made 650whp in Denver with a JMS Booster.

[KingLT1]

Originally Posted by Camaroking98

he put down griptech 2.5 or 2.3 and possibly machining the supercharger if necessary.

Shouldn't the smaller pulley with normal boost levels put me back at just the regular stock 650hp by itself? the cam and everything else I thought would net me 150ish...

I was thinking 700-750 wheel...can you help me understand better?

Boost is just a measure of restriction. The supercharger is still spinning just as hard. However the system is now more efficient and flowing more air with less boost. 2.3 is pretty standard and shouldn't have any belt slip. Lower 700's should be doable corrected for your elevation. Not really reinventing the wheel here with this setup. So a little bit of time spent with your preferred search engine should yield plenty of results with similar setups.

That being said the car would overall perform better on stock cam, bolt-ons, fuel system, and E60... vs cam, bolt's, and 91 octane.

[JSH]

Originally Posted by Camaroking98

im pumped...really hoping 700+whp from other similar builds thats what im seeing

You won't see 700 actual in COS with the build shown in your first post. Again, you don't need a 103mm with it either.

[Camaroking98]

Originally Posted by KingLT1

Boost is just a measure of restriction. The supercharger is still spinning just as hard. However the system is now more efficient and flowing more air with less boost. 2.3 is pretty standard and shouldn't have any belt slip. Lower 700's should be doable corrected for your elevation. Not really reinventing the wheel here with this setup. So a little bit of time spent with your preferred search engine should yield plenty of results with similar setups.

That being said the car would overall perform better on stock cam, bolt-ons, fuel system, and E60... vs cam, bolt's, and 91 octane.

I specifically just want to stay 91 just in case I do ever go on a road trip...I'm not all that familiar with the area yet, but once I'm comfortable I know there's a few E85 around so I might tune for that later down the line.

With my current mods, I don't need a fuel system upgrade do I? I figured since I'm not pushing for crazy numbers that I wouldn't need an upgrade with that...am I mistaken?

Really just trying for basic bolt on + cam lmao.

[KamZL1]

Originally Posted by Camaroking98

I specifically just want to stay 91 just in case I do ever go on a road trip...I'm not all that familiar with the area yet, but once I'm comfortable I know there's a few E85 around so I might tune for that later down the line.

With my current mods, I don't need a fuel system upgrade do I? I figured since I'm not pushing for crazy numbers that I wouldn't need an upgrade with that...am I mistaken?

Really just trying for basic bolt on + cam lmao.

Ok others much more knowledgeable correct me if I'm wrong here but why are you going cam without needing the high side support right now? IMO if you want to do basic boltons, then a ported blower and 103 tb and pulley would be get you close to where you want to be. hell even add some e since you are up there in altitude. Have you seen cw3 build? very solid numbers without a cam. As it stands with your mod plan, you are not really going to be utilizing the cam. if you want the chop I totally understand, I love it too but I really think there are much more cost effective/more efficient ways of achieving your goals of a solid running street car. Most people here don't go cam until they need it or want to reach up there in numbers like 800+ at which point you are going to have to address fuel system in major way. just my .02 cents, feel free to completely disregard.

[Camaroking98]

Originally Posted by KamZL1

Ok others much more knowledgeable correct me if I'm wrong here but why are you going cam without needing the high side support right now? IMO if you want to do basic boltons, then a ported blower and 103 tb and pulley would be get you close to where you want to be. hell even add some e since you are up there in altitude. Have you seen cw3 build? very solid numbers without a cam. As it stands with your mod plan, you are not really going to be utilizing the cam. if you want the chop I totally understand, I love it too but I really think there are much more cost effective/more efficient ways of achieving your goals of a solid running street car. Most people here don't go cam until they need it or want to reach up there in numbers like 800+ at which point you are going to have to address fuel system in major way. just my .02 cents, feel free to completely disregard.

Have not seen the cw3 build...can you link it here? I'm going with the cam because I figured that would get me an extra 50-100hp on top of the headers and intake but maybe I'm wrong?

What do you mean exactly by high side support?

Also what do you mean by "utilizing" the cam?

Do you really think the smaller pulley, LT's W/X-pipe, and intake would get me 700whp uncorrected?

[CW3SF]

Originally Posted by Camaroking98

Have not seen the cw3 build...can you link it here? I'm going with the cam because I figured that would get me an extra 50-100hp on top of the headers and intake but maybe I'm wrong?

What do you mean exactly by high side support?

Also what do you mean by "utilizing" the cam?

Do you really think the smaller pulley, LT's W/X-pipe, and intake would get me 700whp uncorrected?

700whp uncorrected at 6000ft is about 850whp at sea level, so no definitely not. Those mods will likely get you between 625-675whp Corrected or SAE, IMO. SAE is corrected and is the measuring standard across the board because it takes environmental factors into consideration.

[Camaroking98]

Originally Posted by CW3SF

700whp uncorrected at 6000ft is about 850whp at sea level, so no definitely not. Those mods will likely get you between 625-675whp Corrected or SAE, IMO. SAE is corrected and is the measuring standard across the board because it takes environmental factors into consideration.

Yeah, what I meant by my use of "uncorrected" was that if I applied those same mods at sea level I would be hoping for 700whp.

Corrected and accounting for altitude I understand that I'd be less.

Does that make sense?