I wouldn't run them, I'm just tryin to help the guy find what he's looking for

I'll be running the 1.52 pro mags as per your instructions

 

Well the reason I was asking was to see if they were available to put on an iron headed impala motor while the heads are on.

 

Oh I see, well in that case it's not such an easy swap

 

Yea, to put guideplates on the iron heads, the studs have to be pulled out, the bosses machined flat and then tapped. Kinda tough to do on the car.

 

No problems... Id just like to see more lift. Thats my basis on suggesting the other 2 cams over mine.

 

Sorry for the thread hijack.

 

well if you had no problems with the 224/230 im probably still gonna go that route. If I could afford the best of everything i would go with more lift, but i think the 224/230 has a pretty decent ammount as is. Just one more question for ya... are you running an XD timing set and do you think its necessary? like i said i know someone who isnt, but i dont wanna bust the thing.

 

Just get an LT1 replacement chain. I think I got mine from AutoZone for like 100.00 bucks. It's made by Cloyes, and has about 4000 miles on it. If you want it, pm me for a deal.

 

Well lets put it this way he's running a cloyes double roller. We both can't afford the money or the time to have to rebuild our motors because we want to save a few $100 on a timing chain. If you really go with ported heads the lift could pay off.

 

Actually guys the lift has a lot to with power output but it does depend on how you do it and some cams with lower lifter are harder on parts than cams of the same duration with more lift. It's a very complex amount of physics going on in there and things that seem intuitive like more lift is harder on all the parts isin't always correct.

Bret

 

And by that I am assuming you comparing the 311x lobes with the 331x lobes?

 

Actually in a lot of instances it goes thru the whole line and not always the same lobes in the same familys fit the rules or the applications.

BTW there is not even a 314X lobe in there.... but I get what your saying. I don't comment on particular lobes but the measurement of the lobes is not easy to do simply enough where I can just give you the HOW to do it.

You gotta look at all the lobe specs and what they are relative to each other, that's the key. If one thing is way off say lift or duration at a certain spec it can throw EVERYTHING out of wack.

Bret

 

Not to hijack the thread any more, but since you're talking about mods on Impala heads I figured that I'd let ya know that I have a pair of bare unmolested Impy heads sitting in my garage that I'd like to get rid of if your interested....if so, PM me

 

I was really into the cc306 but i really don't want to rev that high, the more i look into the 503 the more i like it

 

So what exactly does LSA provide... lower or higher RPM range of power, the deep exhaust sound...?