Im working on putting to gether a engine for my 88 S-10 it is a 0.030 over 350 about 10:1 with ported 113 ally Corvette heads and headers it is going to have a stock TPI.

I have a Crane cam and I was thinking about useing it this is the numbers on the cam.

224@050 intake 224@050 exhaust and lift is 0.460 with 1.5 rockers the center line is 114.
They say RPM range is 2200 to 5500 I know the stock TPI is not good after 5000 rpm so it is not that far off.

What do you guys think?

JD

 

looks good to me.

I personally think that one with a slightly higher lift but less duration would work better but that one looks like it'll make good broad power curves for a nice street engine. The 114LSA will help keep the powerband low like you want for a TPI long tube set-up.

If you already have that one or can get it really cheap, then I say use it. If you are buying it new then you might want to look a little more.

Tuned port is about air velocity and to me a little more lift with less duration seems to build more velocity.

Comp cams has a 210/220 with .480/.480 lift roller cam that is for TPI's. Good cam. I used it for a couple weeks and spun a bearing in my tired old motor. Now it's going to be 383 w/ LT1 intake so that would be too small of a cam for that set-up, so I sold the cam.

 

Too much duration. You should look for something with less than 220 intake duration.

 

Yeah, thats too much cam for a stock TPI for sure. And the duration is hella long for that lift too, sounds like a very old tech grind as well.
If you're trying to do the best you can with a stock TPI on it, i'd run something like the 212/218 comp XE grind. Anything bigger than that would pretty much be a waste of time.

 

I know it is a little big and yes it is a old cam it came in a engine that was in my 68 Camaro when it had a TPI engine in it but I took it out and put in a nother engine with a carb.
I was just hoping that I could use it since I had it and I did not want to buy a nother one but I guess I will have to since you say it is too big.
On the cam card they say it is good from 2200 to 5500 rpm so I thought it was not to bad.


JD

 

Well you could run it, but it would need chip tuning for sure, and the RPM range of that cam doesnt match the RPM range of the TPI at all.

 

I'm running a bigger cam than that in my LTR TPI motor.

Here are the specs:

.503/.510 lift (with 1.5 rockers)
224/230 duration @ .050
112 LSA
108 ICA

But, my intake setup flows a little better than stock
(Vortec TPI base, ported SLP semi-siamesed runners, ported plenum, 58mm TB)

Mike (1bad91Z)

 

port your plenum and you can gain about 500 rpms or more. to take advantage of cams that run until 5500. intake work will help too.

 

Stock TPI runners and base will not support much over 300hp realistically. If the cam isn't picked with that kind of airflow limit in mind, you'll just suffer. Like the man from the wasteland says, you'll need a lot of chip burning just to get it to drive well, and t still wouldn't be as fast as it could.

 

I know this cam is a little to big but I was hoping that since it was 114 center line set at 109 it would help it a little since the power band was so wide but now I dont know what to do because I really dont want to spend the money for a nother cam because I have this one and I was thinking about getting a better intake later, I was thinking about getting maybe the Stealth Ram and that would be a little better cam for that intake dont think?
I know that I will have to burn a chip and Im even have one because I still have the one that was in the computer when it was in the Camaro but me and my friend are going to fine tune it if we have too.
Guess I will have to think this over again.


JD