Okay, heres my situation. I'm trying to get my TPI swap together but I'm not sure about what to do for the induction. I'm going to be using ported 180cc Iron Eagles for my heads, that much is for sure. However, I don't know what cam/ intake setup to use. Right now the 355 has a 204/214 .420/.442 cam in it. There are three real choices I've come up with for the induction.

1. Port the base and keep the cam in there. The only problem is the guy that I bought the TPI setup off of started porting on the runners on the side that meets the base. He cut out the divider on one of the runners for about half an inch or so, so I figure that might cause some problems.

2. Siamese the base and keep the cam.

3. Siamese the base and swap the cam. If so, what cam?

I'm kind of leaning towards #3, but I figured I'd get you guys's advice on this. Keep in mind that this is going to be a daily driver so it needs to idle decent and get okay gas mileage. Thanks for any help.

 

LT4 hot cam would work real nice with that setup.

 

That would be a great option, the only problem is the block is from the 70's and not setup for a roller cam. Forgot to mention that. Any other ideas?

 

Hmmm....okay, I did some research and think I'm going to go with siamesing the base and swapping cams. I've narrowed the cams down to the Xtreme energy 256 or 262. Those two cams are ground with a 110 degree lobe seperation angle, but I've heard that TPI's like more around 112-114. Could one be ground with 112-114 degrees seperation?

 

the cam I have is the powermax crane cam for the retrofit hydraulic roller. It is a 222/230. It has a 112LSA and has a little lope to it but runs stronger than the LT4 hot cam. A little pricey at 299.99 but is nice running cam.

 

Greasemonkey...Look through the Comp and Crane books. They make a flat tappet cam that has a 114 LSA to work with EFI. I got the biggest one I could find a year ago. 222I and 226E at .500 lift with total lift at .470 lwith a 114 LSA for my 406...It works great.

They made these cams to cover the 305/350 guys in 1985/1986 with the hydraulic flat tappet cams and TPI.

Cost was reasonable too compared to getting a custom grind.

Good luck.

 

Yeah, I found one. I wasn't paying attention and the cam I was looking for was listed right underneath the others Oh well. Its the xtreme energy 262H-14 with a duration of 218/224 and lift of .464/.470 and the LSE of 114. I figure I'll run this cam with the siamesed base and ported heads. Hopefully it'll run pretty well. Thanks for the help guys.

 

The LSA of 114, is too loose, Comp Cams makes a 264HR in their Xtreme Energy Series with a LSA of 112, I little tighter on the LSA will make a good size difference. I have the cam installed with so many other mods I'd be typing for a week......And the cam does extremely well.....Well....very well....ok i love it DAMN IT, you happy now

 

Oh yea forgot to mention that the specs are 212 int and 218 ext at .50, with 1.5s, and .488'' int .495'' ext LSA 112.....

 

I'll tell ya, I'm good.....No No hold you applause please.....LOL, anyway Comp Cams also has a Retro-Fit roller cam identical number I listed, but with a lobe seperation of 110......it just keeps getting better and better......good luck, hope i could add some food for thought..