Greetings,

I need to replace the cam and lifters on my 305 tpi, can someone give me some advices to make the good decision, I found this one, any suggestions?

http://store.summitracing.com/partde...2&autoview=sku

Thank you.

 

be sure you tear down your engine to clean out all the metal shavings. If there are metal shavings in the oil pickup, pan, galleys, etc etc etc it WILL destroy the bearings and the engine upon break-in of the new cam. You're really rolling the dice if you decide not to.

PS - It's REPLACE. No M necessary.

That's the xe262he. That's a great cam, but if you are using TPI, i'd recommend a TPI friendly cam. Same cam but on a 114 LSA:
http://store.summitracing.com/partde...4&autoview=sku

 

Sonix , now I know a good cam and how to spell "replace"

 

question? isnt 114 degrees of lobe seperation alittle too much for a 305 application? im also looking for a new cam for my 305 tpi

 

No, but 110 might be.

 

https://www.thirdgen.org/mods3

according to that though is says 112 is good for a street car but for every 25 ci above 350 to add 5 degrees and subtract 5 for every 25 cubic inches that its smaller than 350 ci, so being that 305 is almost 50 cubic inches smaller that makes the ideal degrees around 102-110 ? but i guess if your going turbo or supercharged you could go up to 115 no?

im not completely sure on this, but this is what i understood from that article

 

I think you're looking at intake duration.

 

LSA is a really tricky animal.
Based on cubes, there is a "best" LSA, for a common setup (carbed, medium street cam, etc etc).
However the "best" cam will change drastically based on induction. Carbed has a lot of freedom, FI puts rules on it. You need a wider LSA to run FI. So no, the 114 may not be perfect for power, but you need it so the computer knows what the heck is going on.

 

You bet. Don't forget that LSA is in cam degrees so for a given duration cam, a 2 degrees decrease in LSA means that the exhaust closes 2 degrees later and the intake valve opens 2 degrees sooner. This increases overlap (time that both valves are open) by 4 degrees. A big difference.
This is the part that the ECM doesn't like.
If you're going with a longer duration cam, 114 might not be a bad idea for a 305. A 350 would tolerate the 110-112 a lot better.
A smaller LSA=more "cam" (ie: choppier idle, lower vacuum etc.) Larger CID engines can tolerate more "cam" than smaller ones.