Comp Cams 268H and 1.6 rockers

[L31MaxExpress]

Melling 22280 would also be a nice cam if one could be found.

 

[Schurkey]

So if I’m understanding correctly, it would be easier (and possibly better) to run a whole Vortec engine?

No. Not if you're going to use the TBI injection; and/or if you've got to meet emissions regulations. The Vortec short-block might be do-able if the block you have doesn't accept the OEM roller-cam and lifters, thrust plate, spider and dogbones, etc.

I’ve seen people recommend the GM LT4 Hot Cam for the Vortec blocks? Does it have a slight lope to it like the Comp 268H? (12-210-2)

Massive computer tuning to make the Hot Cam work in a TBI. But even the 268H is probably going to need tuning.

If the engine lopes, it's running shiity. This is not something to hope for, or want. Folks put up with the lope because of power gains higher in the RPM band--which is not what a pickup truck needs. (or the poor thing lopes because they suck at tuning.)

 

[Erik the Awful]

To clarify, the TBI manifold doesn't bolt onto a Vortec block. The bolt holes don't line up and the Vortec intake ports are too tall.

You must be registered for see images attach

 

[98chevy2500SS]

Planned on using a carb to be able to run the more lopey cam, as others mentioned, tuning for the TBI system is near nonexistent anymore. My dad’s got a carb to Vortec head intake for the conversion so that shouldn’t be an issue.

 

[98chevy2500SS]

.GM LT4 Hotcam or the Lunati BareBones equivalent both run well. If it is the GM one, advance it from the drop in 109/115 centerlines to 107/117 centerline. Works better in the lower compression Vortec that way.

Lunati BareBones Hydraulic Roller Cam - Chevrolet LT1, LT4 276/286 | 20080130

Lunati BareBones Hydraulic Roller Cam - Chevrolet LT1, LT4 276/286

www.vividracing.com

Just listened to a clip of the Lunati cam you posted and it sounds exactly what I’m looking for!

 

[Erik the Awful]

My dad’s got a carb to Vortec head intake for the conversion so that shouldn’t be an issue.

Then see post #4. You'll need a squarebore to spreadbore adapter.

 

[Supercharged111]

Then see post #4. You'll need a squarebore to spreadbore adapter.

Only if he runs a q-jet, I don't think he specified which carb he was gonna run.

 

[Hipster]

Full disclosure - I have a $50 flat tappet cam in one of my engines, but having learned so much in the last year, I plan on sticking with name brand rollers in the future.

Not sure if it was you or not, but I was telling somebody I wasn't happy with an Engine-tech cam. The one I had was stamped made in China and after looking at the lobes I decided to not to use it. They weren't well finished. It was one of those generic sbc .422/.444 type grinds. I ended up getting an Elgin for that engine.

 

[Erik the Awful]

Only if he runs a q-jet, I don't think he specified which carb he was gonna run.

Doh! I was still thinking he was going to use the TBI.

 

[98chevy2500SS]

I was going to use a Holley Street Warrior 600cfm 0-08457S carb, says its got the 700r4 compatible throttle lever.

I think I’ve decided to continue with the Vortec engine and leave it with the stock roller cam then I wouldn’t have to get more machine work done to the heads.