Michael_D

Out of the two cams you noted earlier, I like the smaller grind. Would be rowdy N/A, but would have decent manners with boost.

I went with 1/2" spacers. I hate spacers, but they are not leaking. They are still a PITA to deal with whenever I have to pull the covers. I had to re-grind all the clearance reliefs, because the Crower rockers do not have the same C/C spacing as the OE rockers. I also had to move the driver's side coil pack.

Unreal

Coil packs are all relocated either way. I know the mast heads have a different height, so maybe I'll hold off on any spacers until I see.

Made my own coil brackets but just ordered the ICT billet ones for the holley covers. I run the IGN1A coils, so had to fab up brackets either way.

Agreed on smaller cam so far, but will continue to talk to a few people.

Unreal

Got more cam specs from a few new people. Everyone seems to want to go big. Next up was a 242/260 117+5. With 17 degrees overlap shouldn't be "bad" to drive, especially with blower, but not sure I want to go that big.

blackz97

How did you like the driving characteristics of the old setup? What were the specs on the old cam? More important what was the IVC? How are you setting up the new engine? Same displacement? Whats the static compression going to be (compared to old setup)?

Im not a fan of big cams with overlap on blower cars, but if the blower is big enough not to care about the losses from overlap, and the engine is large enough in displacement not to be a dog down low, then you can go with a bigger cam and make bigger power without taking a major drivability hit.

RamAir972003

239/246 659/630 115*3

lt1z

Its not a bad Idea. I have used a 239/254 115 in similar builds with great results and good drivability.

Unreal

Old cam was 230/246 116+3 .650 lift. New motor is same displacement, upping compression 1/2 point. 10:1 compared to 9.6:1. Not worried about being a dog down low. Just worried about driveability. Then again with 17 degrees of overlap and a blower shouldn't be bad.

People throwing out random numbers is useless without knowing exactly my combo and what I'm going for. So no need to just randomly spit out numbers. If you want to discuss cams, keep a discussion.

RamAir972003

Good luck hope everything goes very well...

blackz97

Well for a 427 i think you may agree that the 230 intake lobe could be considered 'smallish'. If you are going up in compression that will only give you room to grow, so to speak. Some other things to consider from a drivability standpoint are if you are switching to a different head with a larger intake port that will affect airspeed in the port and therefore low speed driving characteristics. Also i think i read that you are now on a sheetmetal intake which arent known to help drivability, but maybe you were already on that intake with the old setup so you got used to that change (it will only get worse with a bigger intake port on the head).

That 236/250 you called out earlier would probably work great. 6 degrees more intake duration and still a 14 degree split. The IVC event is going to happen later though because of the bigger lobe and less advance which is where you will be sacrificing some drivability but i dont think it will be too bad.

You are going to be on the upper limit of that YSI though arent you?

Unreal

Was at upper limit of YSI before, so that is why I'm wary about just adding more cam. It isn't like I have blower on tap, or will make more power.

Sheet metal was on before and drove great. Honestly both suggested cams will probably drive perfectly fine. Blower cars are less prone to low end issues, and 17 degrees of overlap isn't that much. Old heads were PRC 285CC and new are Mast 280cc, so port size not much difference. Either cam is ~700 lift, to take advantage of the head flow.

More than willing to give up low end, as the car had TONS of low end, and just spun easy. Made almost 1000ftlbs. No matter what it won't lack power down low.

Michael_D

Who suggested that grind? What lobes?

The one benefit of an inverse roller lobe, is you can run more duration and low-speed behavior is not adversely affected as much as a standard lobe profile.

Ya know, you can always change the intake seat angle a degree or two and help low-speed reversion. It is a pretty good option for boosted engines. Not a great option for N/A..... Won't have to worry about the valve either, it'll work. Might be worth a quick call to Mast and ask about it.

Unreal

That was from my engine builder. He didn't specify lobes, or lift. Said he ran the numbers through his cam program/etc and based off my needs and combo, that is what he cam out with.

Block hasn't even been cast yet, so not in a rush. So busy with other stuff. Was just given 300+ guns that I'm sorting, cleaning, and dealing with.

Michael_D

You better delete that before the liberals hunt you down.......

Sounds like you have one hell of a friend.

Unreal

Grandfather sending stuff down before he kicks it. Owned a pawn shop for 60+ years, and has so much stuff. First round even at 50% trade in value, came out to about $12k in old stuff. Lots of old collectible stuff that I have zero interest in. If I lived up in Alaska or somewhere crazy, I would keep stuff like the 300 H&H or 338 win mag, but I just like to punch holes in paper, so I'll probably trade most of them in on a few nice pistols, and one nice bolt rifle, and the rest will just get sold for cash.

stefuel

Just went through this but after bucket kicking.. Check your Federal, state and local laws. I could only legally transfer 6 guns annually as a non dealer. I had about 25 to deal with. Sold everything to a dealer and let him deal with it. I have special needs people in the house and no where to safely store that kind of firepower.

Unreal

Traded in 11 old rifles on 1 new rifle, 3 pistols, optics, ammo, holsters, and other knicknacks. No updates on car, but bored so had to do something fun.

Unreal

Block finally shipped. So progess may start moving.

Paid BTR $20 to do a custom cam spec. Lets see what he says. So far leaning towards just taking comps recommendations as they know their stuff.

Che70velle

Josh B.

I can't wait to see how the block turns out. I kinda wish I had gone the LSR route but I'm not going to juice mine at all so the resleeved stock block is probably ok for mine. SUBSCRIBED!

lamboworld

I have been waiting on two weeks on specs from BTR and nothing yet. I basically know what I want at this point so I am just going to spec my own cam. I also found out that Brian is not the person who is specing their cams.