1998 5.0 Vortec swap to 1999 LS 4.8 vortec

[Supercharged111]

xc_hide_links_from_guests_guests_error_hide_media

A lot of variables there, but the 224 vs stock is a legitimate comparison and every bit or more of the claimed 80hp. Damn. Kinda makes me want to cam the Envoy now, at least 20 inconsequential HP to be gained there.

 

[0xDEADBEEF]

A lot of variables there, but the 224 vs stock is a legitimate comparison and every bit or more of the claimed 80hp. Damn. Kinda makes me want to cam the Envoy now, at least 20 inconsequential HP to be gained there.

The world needs more cammed Envoys.

 

[Sean Buick 76]

There's no way you're getting 80hp from a cam swap without going nuts.

To clarify I should have added two things to my 80 Hp claim:

1. Long tube headers, I use them on all of my vehicles so I forgot to even mention them.

2. I was talking engine dyno numbers not rear wheel.

That Holdener video proves my point, 80 Hp gains with just a cam and valvesprings.

I use speed engineering headers on my LS trucks, they sound great and they are low cost!

 

[L31MaxExpress]

This is essentially a L31 with some head cleaup on the crappy flowing Mexican Vortecs and a 218 @ 0.050 LT4 hot cam. The good OE Canadian heads already flow out of the box about what the Mexican heads flow with the work he did on them.

xc_hide_links_from_guests_guests_error_hide_media

 

[0xDEADBEEF]

To clarify I should have added two things to my 80 Hp claim:

1. Long tube headers, I use them on all of my vehicles so I forgot to even mention them.

2. I was talking engine dyno numbers not rear wheel.

That Holdener video proves my point, 80 Hp gains with just a cam and valvesprings.

I use speed engineering headers on my LS trucks, they sound great and they are low cost!

The only nit I would pick is the 224 cam I had was anything but mild. It shook my whole car, which I loved of course.

 

[Sean Buick 76]

The only nit I would pick is the 224 cam I had was anything but mild. It shook my whole car, which I loved of course.

Well yes everyone has a different idea of what mild is lol!! I have a massive cam in one of my 12.8:1 compression Buick 350s… idled at 1000 rpm and makes power between 3500-7000 rpm. I can’t remember the cam specs but it’s big!

 

[Supercharged111]

This is essentially a L31 with some head cleaup on the crappy flowing Mexican Vortecs and a 218 @ 0.050 LT4 hot cam. The good OE Canadian heads already flow out of the box about what the Mexican heads flow with the work he did on them.

xc_hide_links_from_guests_guests_error_hide_media

I like that channel. Check out this Vortec with an LT4 cam. I think he cheated with some head work, but this thing rips.

xc_hide_links_from_guests_guests_error_hide_media

 

[Supercharged111]

To clarify I should have added two things to my 80 Hp claim:

1. Long tube headers, I use them on all of my vehicles so I forgot to even mention them.

2. I was talking engine dyno numbers not rear wheel.

That Holdener video proves my point, 80 Hp gains with just a cam and valvesprings.

I use speed engineering headers on my LS trucks, they sound great and they are low cost!

I'd long been under the impression that a high effort cam would yield 60 or so on a truck motor.

 

[L31MaxExpress]

I like that channel. Check out this Vortec with an LT4 cam. I think he cheated with some head work, but this thing rips.

xc_hide_links_from_guests_guests_error_hide_media

I cheated on the old Q-Jet fed version I built nearly 20 years ago with a bit of head work. A little bit of intake bowl, chamber and exhaust porting. Without the cylinder head work it still would have made 400 hp given it had good 906s on it and the Humble Pie Goodwrench L31 350 Car Craft made 401 hp out of at about the same time had the Mexican 062s on it.