I re-built a 350 lo5 and I am looking for a cam, mind that my heads 193's will be ported to full extent. What cam would be good from these choices??

 

If these choices are for TBI I don't think that any of them will work really well with the computer. I have the impression that tbi friendly cams are running at least a 112 degree lobe centerline.

 

Those cams are all WAY too big, and my guess is that they aren't hydraulic roller cams either. Personally, I'd look in the 218/228 @.050 duration with around .500 lift and a 112 separation.

Of course, you better be ready to tune that EPROM, it will run like hell if you don't tune it well. I think I just coined a good PROM tuning phrase ha.

 

Those look like short track solid lifter cams. I see valve lash settings and you won't see those for hyd cams as far as I know.

 

Ok, what kind of cam can I use to run the lo5 without tunning the chip. or at least getting a stage 2 chip from tbi.com.
I just want decent street performance out of the motor, but the real trick would be nos on the top. So I just wanna get my 350 running and I need a cam. What would be good.
Mind that lo5 is a flat tappet cam. It came from a truck. Thanks for your help.

I'am trying to get the 350 done and ready to go in by the end of august. Thanks again for all of your help.

 

Things to consider are the rest of the setup such as gears, stall, exhaust and you said no chip work. If you read up on some of the past threads on here you will see some setups that others have and compare what they have with what you have and want. I believe that Ronny has a flat tappet motor in a Vette.

BUT............as our friend BronYrAur has so quoted;

(Of course, you better be ready to tune that EPROM, it will run like hell if you don't tune it well.)

 

Hey I have a flat tappet cam too

If you don't want to do any tuning then you need stay small, real small. Something in the 202 to 208 range would be good, and make sure you have at least a 112 lobe sep, more would be better. Sure you may be able to get away with more, but there is no guarantee that it'll run even ok without DIY tuning, mail order won't cut it. Your going to be adding your power via the little blue bottle so I wouldn't be too worried about it unless your wanting to build a serious motor, in which case you need to be thinking about tuning.

Another thing to keep in mind, the stock fuel pump would barely keep up with the fuel demands of a stock motor, so if your going to be adding a NOS kit, then you need to upgrade the pump in the tank.

 

I really dont wanna tune, but I am really good at computers. I thought carb, than I said no way. I wanna stay TBI and show people who daddy is with it. It s more to shut the nay sayers down than anything else.

How about stealth ram
just kidding

 

In order to shut up the naysayers you have to know more than them, which means diving into these computers.

 

Crane have a series of so-called TBI compatible cams called the PowerMax 2030, 2040 and 2050. Formerly known as CompuCams series I believe.. The 2050 is supposed to be about the biggest they recommend for an unmodified computer.

 

Just about any cam seems to cause issues with teh stock computer. Modified is a whole nother story. If your good with computers, mods with the TBI ecm are gravy. Its real easy to work with and theres alot of useless junk in there that can be thrown out. There is also the advantage that you can add an extra 4K of addressable prom space, which gives you more space then you can use. By the time you junk the useless stock stuff, you can ahve around 5-6K of free space, some extra time in the 80 Hz routines, and a few empty real time subroutines to run non-critical stuff.

On teh engine side, Id say use another head rather then your tbi ones if youve never done any porting. Removing lots of material from the ports can really change the aspects of how the head performs. It may work well, it may not. Starting with some good stock heads from a tpi may be easier. If youll be using this on the street, you also have to take care with the injectors. The tbi injectors can fuel up top, but shrinking pulsewiths can cause problems at idle. Id say a cam with around 218 degrees of duration at the intake would work well. Ive been wanting to try some of the more aggressive flat tappets if my car ever stops breaking down.