SSP_6.2

Would you guys recommend milling heads on full bolt-on, stock cam 6.2 L92. Thinking the bump in compression would deliver some good useable power with the vvt and 2800 converter. Looking for some input. Thanks

KW Baraka

iTrader: (7)

If it's power I'm going after, I'd go with more cam before I'd go with more compression.

IJS.

KW

redtan

iTrader: (5)

I'll take more compression before going more cam any day of the week, so yes what you plan on doing should help. Although don't expect a huge difference at least not in peak power.

KW Baraka

iTrader: (7)

With the stock cam....there's not much that more compression is gonna give ya.

We're already at the upper reaches of what's considered optimal DCR. One of the main reasons why these engines (the LS3's) respond so well to cam swaps, is because a 'bigger' cam drops the DCR into a better/more optimal range. If you mill the heads to raise the SCR, you also pull the DCR further away from the engine's optimal point.

IJS

KW

SSP_6.2

Thanks for your responses. I'll leave the heads alone on it. I'll probably never cam it, honestly it's wife's daily. Most parts were from my truck i sold on it.

redtan

iTrader: (5)

There's nothing "optimal" or "maxed out" about 10.5 DCR. I've never heard of more compression hurting power, torque and efficiency especially when talking these kinds of levels.

You have it a bit backwards, big cams usually require more compression because they lower SCR too much with long intake duration. Big cams with 10.5 DCR are going to be lazy as **** that's why you see people recommending to increase compression to benefit power and efficiency everywhere ESPECIALLY when going with a big cam.

In the grand scheme of things, leaving it alone is probably for the better as without doing anything else it's not going to gain you that much. Again, compression helps with big lazy cams. If you're not going to do that then don't bother taking the heads off just to mill them for a bit more compression.

SSP_6.2

Im going have engine pulled tomorrow due to oil pump failure and get crank turned. Just thought it'd be cheap hp while in there

redtan

iTrader: (5)

If you're taking it apart then you're going to have to mill the heads anyway a bit to get a flat surface for re-assembly. I would then mill it to get 11:0 compression and be done. Just fine for either 91 or 93 octane.

KW Baraka

iTrader: (7)

I didn't state that more compression would necessarily hurt performance, but with a stock cam it won't really help.

You seem to be confused regarding static and dynamic.

And I recommended MORE cam, not a "BIG" cam.

A cam in the area of 218* to 224* will make for a FAR better performer than a stock cam with 11:1 SDC.

But again, not necessarily so with 'small' stock(ish) cams.

KW