Milling L92 heads
Thread Starter
Teching In
Joined: Sep 2013
Posts: 35
Likes: 0
From: Port Arthur, TX
Milling L92 heads 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
IJS.
KW
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.
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
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.
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.
Trending Topics
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.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo ....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.......
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