Because of the awesome gains and drivability, the TR220 seems to be a very popular cam for us 4.8 and 5.3 guys. I was thinking of getting a the TR220 112LSA (220/220 .551/.551 112 LSA) for my truck. Then when I really started thinking... I came up if it was possible to order a higher lift Thunder Racing cam... something like a: TR 220/220 .563/.563 112 LSA or TR 220/220 .569/.569 112 LSA.

I've read several threads that more lift = free hp and the 4.8 & 5.3 heads have a flow limit of around .565-.570" stock. Which in this case would mean getting the most hp possible out of the stock heads.

I know TR camshaft have aggresive lobes and they dont recommend the use 1.8 rockers, so will more lift work with the same 220º duration and the aggresive lobes? Will it be too much strain on the valve springs or pushrods... the most popular seem to be Comp 918 springs (.600 max lift) and some after market hardened pushrods.

Do you guys think a higher lift TR220 is a good idea???

 

Hmm... We're not limited in lobes as most think. There are so many variations of the 220 lobe it's not even funny.

For example, straight from Comp... available to anybody.

220*-.564''
220*-.581''
220*-.597''
220*-.544''

And the lift thing... I brought this up with some of the Ford boys @ HC50.com
I gave flow data of the 5.3L heads (supplied by Richard @ WCCH) and received some interesting opinions.
To sum it up, we can use a lot more lift as long as the correct valve train components are used to keep things stable.

Read here.

 

Comp grinds all of Thunder's cams anyway so give them a call and ask them. Comp charges the same price to custom grind a cam as they do for a shelf cam.

 

Very good question!! I too am thinking of getiing a TR220, so I hope someone chimes in w/ a logical answer.

 

Call Comp and tell them that you want a 220/220 XXX/XXX 112lsa and they will grind it, or call someone (maybe comp will do it too) and tell them what you want out of your truck and let them design a cam for you. Thats what I did, and cammotion came up with something VERY similar to the TR224, but with a bit more lift. Ill never buy another off the shelf cam once I found out you can get a custom cam for the same price.

BTW cammotion cuts FMS cams too

 

You have a link to cammotion?

 

No, they are in town, and a friends brother in law owns it. I have some friends that work at FMS, and they all say cam motion cams make more power under the curve than Comp. i dont know, but Im happy with mine.

 

www.yahoo.com

 

Linky-no-worky.

 

http://www.cammotion.com/