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by **Andy Si** on Thu Sep 13, 2001 4:14 am

If you fit a performance cam am i right in thinking that it's also advisable to strenghten the bottom end ? ? ?

If so what actually needs to be done to it ? ? ? and would you advise uprating anything else? ? ?

[ERRR] i haven't got a clue :???:

by **bassboy** on Thu Sep 13, 2001 6:39 am

nah m8, the bottom end doesnt need [ERRR] work doing to it when u have fitted an uprated cam

what engine is it?

bassboy

by **Andy Si** on Thu Sep 13, 2001 8:37 am

Just a standard 94 zetcec 1.6 16v.

It just that im sure i read a post on here once that said "im fitting a cam blar blar blar"

and someone replied with "make sure the bottom end is up to it"

:???:

<font size=-1>[ This Message was edited by: Andy Si on 2001-09-13 08:38 ]</font>

by **bassboy** on Thu Sep 13, 2001 9:42 am

nah m8, everything should be kool just by fitting a cam....all that the cam will do is keep the valves open longer therefore chuck in more petrol and air hence more power....the bottom end aint gonna get harmed at all

what cam u thinking of getting?

bassboy

by **zetec69** on Thu Sep 13, 2001 9:46 am

Andy - I would definately make sure your bottom end is ok first.

I've had a new cam & lifters on two of my cars - both of them ran sweet for the first couple of months then after a few raggin's the bottom end went on both of them

by **bassboy** on Thu Sep 13, 2001 9:55 am

really zetec??? howcomes that?? u sure the rings or something werent on their way out [ERRR] way?? [ERRR] every car that weve put a cam in has been fine... :???:

bassboy

by **zetec69** on Thu Sep 13, 2001 12:07 pm

Yeah serious bassboy. It happened on my 1600 cvh & my 1600 cvh efi. My mate had it happen to his aswell. The thing is my mates dad gets new cams & lifters from work on the cheap so a lot of us have replaced ours but if you hammer your car the bottom end goes easily unless it's it top notch condition. Don't know why but it's happened many a time! :???:

by **gar mae** on Thu Sep 13, 2001 1:25 pm

Yeah mate, if your putting a wild cam in, it's better to have the bottom end worked. This is because you move the peak power of the car up the rev range to about 6400 (with my piper 285 cam) So the car will spend more of it's time around this rpm, which is not good for a bottom end.

But saying this, I ran my car with a cam for over a year and never blew the bottom end, just take it sensible.

by **Andy_XR2i** on Thu Sep 13, 2001 2:03 pm

Check Graham's site also, has some info on uprating the the rod bolts.

<A HREF="http://www.zetecinside.com/xr2/zetectune.htm#rod" TARGET="_blank">www.zetecinside.com/xr2/zetectune.htm#rod</A>

-Andy

by **bassboy** on Thu Sep 13, 2001 2:40 pm

i knew that about the wild cams but not the everyday piper/kent cams that u can get...oh well...learn something new everyday :smile:

bassboy

by **Andy Si** on Fri Sep 14, 2001 3:34 am

Bassboy,

Im not to sure yet - proberly look @ Piper or Kent, but to be honest I haven't really got a clue :???:

I want summit that gives a little less peak power, but improved mid range gains.

Anyone got any ideas ? ? ?

:???:

<font size=-1>[ This Message was edited by: Andy Si on 2001-09-14 06:53 ]</font>

by **Fezzy Turbo** on Fri Sep 14, 2001 7:29 am

I have a Kent CVH31K cam which is a "mild" cam fitted and this has given me no problems and i have not touched the bottom end of my engine.......i am sure we all know how many miles i have so i wont repeat :wink:

by **Andy Si** on Fri Sep 14, 2001 7:46 am

@ what stage do you notice the pick up ?

by **Ian C70T5** on Mon Sep 17, 2001 3:23 am

I fitted the Piper T2 cam, and a week later my bottom end is going, but i dont think it is done to the cam, it was just speeded up by the cam... cause it was losing power a while before..

So as mentioned the cam quickened the bottom end blow up.. :sad:

by **Ian C70T5** on Mon Sep 17, 2001 3:26 am

I fitted the Piper T2 cam, and a week later my bottom end is going, but i dont think it is done to the cam, it was just speeded up by the cam... cause it was losing power a while before..

So as mentioned the cam quickened the bottom end blow up.. :sad:

by **Andy Si** on Mon Sep 17, 2001 4:59 am

It seems like Bassboy and Fezzy are the only ones who haven't had any trouble.

:grin:

by **bassboy** on Mon Sep 17, 2001 7:29 am

obviously, no matter what u do to the engine, it will shorten its life...especially performance wise...but like i said, weve never had a problem or a come back...all the cams and bottom ends are still going strong even over a year down the line

bassboy

by **Andy Si** on Mon Sep 17, 2001 9:34 am

Bassboy,

What would you recommend for lower/mid range gain ? ? ?

:???:

by **paul_watson** on Mon Sep 17, 2001 11:26 am

i dont know if u care, but i put a new cam and lifters ect.. in my old xr2i and replaced literly everything in top half. a few months later the bottom half went. i heard of it happen to others too :cool:

by **Fezzy Turbo** on Mon Sep 17, 2001 11:36 am

A cam, as we all know, makes the valves stay open longer, which allows more air and fuel to enter the cylinder.
This results in a bigger BANG in the cylinder which gives you more power.
But this bigger bang obviously makes more stress for the pistons, conrods etc.... so putting a "lumpy" cam in to a high mileage car is probably not a good idea. My car had done 104k when i had the head, cam etc done....but i only put a "mild" cam in so i hopefully didn't get problems and so far it has worked :smile:

by **bassboy** on Mon Sep 17, 2001 12:33 pm

i would have to say the cam...just as long as u have done all the other bits...e.g exhaust, air filter, possibly a chip...u could also change the throttle bodies for a bigger one

bassboy

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