SteelCityMaro

so i built my 402 with all these good parts (in my opinion)
wcch stage 3 l92
mast intake
pro systems 1000 cfm carb
dual springs, custom pushrods, STOCK rockers
electric water pump
forged bottom end
11:1 comp

but the cam i got was wrong for my set up duration was a bit off LSA wrong and lobes. I did some looking around and decided to call The man Geoff over at EPS man that guy is a stand up dude very nice knows his **** and can really design a cam. So he hooked me up with a:
243/255 .627/.632 110 he said my little 402 should be a torque monster and run deep into the 10s the cam will be installed as soon as it arrives and i wil be posting track times of my old cam VS the EPS cam im trying to convince my buddy to call geoff up he his a skeptic and doesnt believe that eps has the best lobes around. SO if anyone would like to bash him and tell him why EPS is the **** !!! post up thanks guys

OLD cam
243/251 .620/.630 112 lobes ??

New cam
243/255 .627/.632 110 EPS lobes

has anyone else changed their cam just a little bit like this and got big gains ?

SteelCityMaro

No feed back on EPS fellas ??

And has anyone ever seen big gains by adjusting the same as little as I did ??

speedtigger

iTrader: (16)

I can't imagine that cam change delivering much in the way of measurable results if they are both on the same intake centerline, but post up your comparison and be sure to mention the intake centerline on both cams. What are your current track times?

SteelCityMaro

Well I just got some issues fixed with the car like rockers I went back to stock 1.7s with the trunion upgrade and I need to figure out this msd 6012 box of mine I kinda wanna do it on the fly at the track. But I will be runnin it this weekend and will post up I'm really curious to see how these eps lobes do I know it's a very small change in cams but lobes are way different so I'm thinking I will have a lot more valve control ( in theory lol) but Geoff said he designed this cam for monster torque so just gotta run it. I was just wandering if guys have switches lobes and had good gains ? And my old cam was a 112+2 my eps cam is a 110+4

InsaneDomestics

iTrader: (28)

Subscribed...

speedtigger

iTrader: (16)

Well, that is the equivalent of advancing your current cam from 110 degree centerline to 106 degree centerline which will move the powerband downward and increase torque. So, you wont be comparing cams so much as advancing the cam timing. Narrower lobe center cam should respond better to advance than the 112 cam though, so it is a sensible change.

SteelCityMaro

Good my goal is to be in the deep tens with the car I have a th400 with a 12 bolt rear and the car is 3300 with me in it just gotta figure this msd box out !! And would it be wise to go to a thicker head gasket to bump comp a little I am currently using stock ls3 head gaskets

speedtigger

iTrader: (16)

What is your transmission set up?

SteelCityMaro

Built th400 with a ati 4 k stall might have to get a bigger stall once I get some passes but what about the head gasket ?

speedtigger

iTrader: (16)

I used the factory head gasket. You will have to look around to see what the fast guys are running.

ZONES89RS

iTrader: (25)

I have a 114 LSA cam in the 5.3 that is in my TA, i was going to boost it, but now i am going to use nitrous, so i need to swap it out, i am trying to see what would be a good grind for it. Anything 110 LSA for starters, LOL.

3pedals

iTrader: (3)

that 402 should go mid 10's FOR SURE, and deep10's once finely tuned, as long as the chassis is set up well.

SteelCityMaro

Oh man that's one things this car does is hook like a monster deep tens is my goal hey zone I'm tellin you go talk to Geoff at eps he is a no bullshit kind of guy and will tell ya how it is. I'm excited to see how his lobes do but what do you guys think about my head gasket ( zone, 3pedals) I wanna bump comp a little but still use pump gas would a .60 gasket do the trick ?

GC99TA

iTrader: (30)

If you want to "bump" the compression, this to me means you want to add compression. If this is truley the case, a thicker than stock .060 head gasket would be moving in the wrong direction as you would be decreasing compression and increasing quench (possibly adding to detonation sensitivity). The GM MLS steel head gaskets you're currently running have proven themselves to do very well, and I've even seen them used in some fairly high-horsepower builds. However, if you feel you need to run a head gasket thats a different thickness than stock to increase (thinner) or decrease (thicker) compression, I would look into a set of Cometic MLS head gaskets. Cometic is probably the number one most popular custom head gasket used in LS engines as they can be ordered in a variety of thicknesses and bore diameters. Best of luck.

SteelCityMaro

Hey thanks for the info GC I will have to see what Geoff thinks I should run, the car is going to PCM for less to get tuned once the eps cam comes. I need to get some runs in before snow hits !!! You guys ever seen chains on a f body plowin drive ways lol

GC99TA

iTrader: (30)

Hey, no problem. One thing I would do is check your piston to valve clearance with your new cam and current head gaskets to see just how thin you can go without getting into trouble. Since you're running aftermarket slugs that I'm sure have valve pockets....I'm sure you'll be good, but its still good to check.

Then, I'm sure Geoff can help you calculate your Dynamic Compression Ratio (DCR) and quench with different gasket thicnkesses. Both of these figures will help you determine just what you can get away with on pump gas (using rules of thumb, of course).

SteelCityMaro

Hey pedals what h/c/I combo are you running ? And have you guys messed with
Your msd box at the track I was curious how hard it was ?

Geoff

iTrader: (3)

The ICL is quite different.

speedtigger

iTrader: (16)

Thanx Geoff, SteelCityMaro had enlightened me to this in an earlier post. I fully understand why you chose to go with more advance and tighter lobe center. I am quite interested the performance increase it creates for him.

3pedals

iTrader: (3)

I am running L92 heads which came OEM on my LY6 6.0L, comp 227/235 at .050 on a 114+4 cam, and a l92 Vic jr intake w/ 850 Mighty Demon carb.
cam and valve springs are the only things changed on my oem longblock.(except vvt removed)
Barrett