major tuning for this combo?

[TYTILIDIE]

Now obviously to maximize this set up the truck would need a good tune. However, I have seen people up here bolt on a 20g with just an AFPR and TC and run mid 13's all day long with absolutely no tuning. So here is what is on my mind:
First, I have everything I need to a motor together two ways. Short block will be, .10/.10 stock crank, eagle rods, SRP pistons .040 over with stock cam. I have a access to a 412 but depends on what I decide for the heads and tuning aspect.

Option one for heads would be to simply run the stock heads. Second option, I have a Vortec modded intake and a set of Vortec heads I can run. I also am getting Ry's 20g. Anyone here think I can just bolt this crap on and run the truck ok? How much of a difference are the vortec heads going to make? I know I can pull of the 20g but the heads may be stepping up too high? Let me know what you guys think.

 

[Injected1]

Re: major tuning for this combo?

I would think so. Run the Vortecs just make sure you use 1.5 rockers or enlarge the pushrod holes or they will rub. Just talking to Scott about my build in chat and he said the pros of vortec heads are more air flow minimizes detonation. Mike gimme a call on my girls phone left mine at the shop.

 

[Windedv6]

Re: major tuning for this combo?

I would think so. Run the Vortecs just make sure you use 1.5 rockers or enlarge the pushrod holes or they will rub. Just talking to Scott about my build in chat and he said the pros of vortec heads are more air flow minimizes detonation. Mike gimme a call on my girls phone left mine at the shop.

It's not the more air flow that helps detonation with the vortec. It's the design of the chamber. A set of vortecs will help out stock motor because you can run more timing... and they also flow better.

John

 

[Injected1]

Re: major tuning for this combo?

I didn't mean it was the sole reason.

 

[pontiacws699]

Re: major tuning for this combo?

so you could just bolt on the vortec heads to a stock motor and be done with it and no tunning ect? Im still new and doing research but how much would the vortec heads effect performance? not trying to hyjack but it seems like a major mod with out tunning and thats seems pretty good to me. I understand tunning will give you the max but...

 

[It's just a six]

Re: major tuning for this combo?

If you have the Vortecs to install,do it.

If not L35 heads.

Do not use the stock heads,not enough flow.:2cents:

Do you need to smog your vehicles,or is that taken care of ?

Stock cam is anemic,,,what are the specs 173 degrees duration @ .050 204 @ .050 would be a good upgrade from stock, plus can still pass smog legally if that's a concern.

 

[Quickstop [UK]]

Re: major tuning for this combo?

Tooky did a big thread on Vortecs - the anti knock characteristics are barely noticeable. The swirling chanber of flow is supposed to feed the ignition but he didn't rate it that much.

With vortecs and a new turbo you're going to be maxing out your injectors possibly. The stock cam isn't going to match the heads either I don't think - might be wrong...

 

[It's just a six]

Re: major tuning for this combo?

The hype about that the LB4 heads cause knock was probably all started when Kenne Bell said in his catalog that the stock heads are detonation prone.

Maybe compared to the aluminum heads he replaced the stock heads with. But that is a characteristic of running alum heads over cast iron heads.