Camshaft Selection

[Buck89RS]

I need to know what cam i can use that will still allow me to pass emissions and be more aggresive. I have a 2.8L that i am building. There are three on Summit racing the part numbers are: CRN-254112 OR CRN-254122 OR CCA-16-223-4. Let me know what yall think. Thanks

-Buck

[robby1870]

What kinda compression you going to run?

[S10TruckNut]

Why are you building a 2.8 ?

[robby1870]

nothing wrong with a 2.8....now back on topic

[Buck89RS]

I am running stock compression, stock everything, just want a little more cam. I am leaning toward the CompuCam 2020. Not really building just re-ringing the block for another 100,000 miles. Thanks

-Buck

[DetroitsFinest]

You might want to think about going for a complete rebuild. cam bearings have a tendency to go bad from what I've seen on high mile pushrod 60/V6s that have a cam swap done on em..

[Buck89RS]

I am planning on replacing all the mains and rod and cam bearings, just going to do everything except bore it out. Not looking for anything special but i do want it to last awhile.

[v6h.o.]

I am running stock compression, stock everything, just want a little more cam. I am leaning toward the CompuCam 2020. Not really building just re-ringing the block for another 100,000 miles. Thanks

-Buck

the compucam 2020 is VERY close to stock, you wont even notice much of a difference with that camshaft.

i know a friend of mine Passed Ontario's emissions with the Crane 260 camshaft.

as long as you use a good high flow cat you should be ok with a cam in the range of 206-214 degree's duration. stock duration is 198 and something... shit cant remember of the top of my head now.

[S10TruckNut]

2.8' s are not the way to go - unless that's all you have to work with !
You are missing the point of cubic inches are everthing and with a 3.1 / 3.2 build
you will be far better off - the stroke and rod ratio improves the overall efficiency
and allows the motor to run as it should have from the beginning - that' why GM
designed and built the longer stroke crankshaft - unless you work in GM's engine labs - you should do your homework before opening mouth and inserting feet !

[RacerX11]

Oh, where do I begin? Did you not read the entire thread? He is looking to freshen up his existing engine (which happens to be a 2.8 ). He isn?t looking to drop a new engine in, or swap in a 3.1 crank, or any of the other proven power makers. Increased displacement is one way to make power, but it isn't everything. It is just as important to increase efficiency. You don?t have to work in GM?s engine labs to understand this.

Its funny you should mention rod/stroke ratio, because it proves just how little you actually know. GM didn?t increase the stroke to gain a better ratio?they increased stroke to get more displacement out of the existing compact package, and increase torque. The 2.8 has the exact same rod length as the 3.1/3.4, so with a shorter stroke, the 2.8 actually has a better rod/stroke ratio (1.91 vs. 1.72, bigger is better). Increasing the stroke while keeping the rod length constant results in a SMALLER rod/stroke ratio (I can explain what a numerator and denominator means if you need it).

Next time do your homework before talking out of your ass.

Marty

[geoffinbc]

LOL OK OK... Lets not start a bunch of off topic shit. Take it up with PM'S

Anyway I would never suggest a 2020 cam if you are using it for daily driving. Get a COMP H260. I would rather see you get a Comp cam. I bought a Crane Cam and it turned out to be defective. Also I was not the only one.

Crane is probabally a fine cam maker. But I have herd several complaints about Crane and never herd one about Comp. Just my opinion. Others may differ. Also Comp has a toll FREE support line.

[sharkey]

ive used crane, comp, crower, and many other cam manufacturors. most of the time you get good stuff. i have seen comp cams go flat, seen them were they were machines wrong, and one lobe had .100" less lift. i have seen weird stuff with crane and crower. importent thing is, they all replaced them free of change and had great customer service.

for a stock replacment with some added power, id go with the comp 260. a lot of people use it and are realy happy with it.

[SappySE107]

Yup, another vote for the 260. Emissions shouldn't be a problem at all with it and its gonna do more for you than the 2020 or 2030. The 272 would be great for higher compression but that isn't in your plan.

[robby1870]

260.