Cam(s) Thread - Saxperience

S34MER · 19th November 2006, 14:22

Right then guys and girls, im looking to make this a sticky thread (hopefully) with your support, as there seem to be loads and loads of cam threads popping up every week, and the same questions are being answered time and time again! so if all the cam geeks

out there would car to add anything to the thread please do. Im looking to get FAQ's and answers, and any info that you deem relevant about cam(s)

As im not that hot on cams, the way they work or the size of cam needed for certain requirements, i.e. if i wanted to get noticable gains from my car, but still wanted to use it as a daily drive, what sort of cam shold i be looking at getting!

now i found THIS WEBSITE which has a lot of helpful info on it, and also helps to explain how they work!

Feel free to add anything you deem appropriate (please no spamming)

thanks again

Oli

williamsvts · 19th November 2006, 14:47

cam lift - this is given in mm (milimeters), this states buy how many milimeters the cam will open the valve.
cam duration - this is a rough figure of the number of degress the crank turns between teh valve opening and closing.
note: most cams are not teh duration they are advertised as e.g. piper 285s for the vts is actuallky about 260 degress.
you can also go on to look at lift at TDC and at other points in a revolution of the crank.

as i dont have any experiance with fitting cams or having cams in a vtr i can only relly comment on the 16v.

tbh, the next cams up from stabndard (e.g. piper 270s) arent really worth it.
you would be better off going for the next step up (kent pt51, piper 285, catcams 708), all these will give you good power gains when mapped and can be timed to give you a good idle even when unmapped.

other things to change when camming your car would be , cambelt, camshaft oil seals, and depending on mileage water pump and pulleys.
i also changed my head gasket before it went to be mapped as i wanted everything to be perfect so that the cam timing didnt need to be disturbed once set correctly.

when choosing a cam you want to leave about 1.5mm valve to piston clearance, you never know what could happen

lift on standard cam is 8.49mm and has valve clearance of 3.01mm, so you can work it out from there (although this would need to be worked out from lift at TDC). if you were wanting cams with more lift you would either need your pistons rebated or some forged pistons. you would also need to consider throttle bodies as cams with that much lift would be being restricted by the standard inlet.

any more questions feel free to ask

oh, and running in: start the engine check it aint guna bend any valves then turn it off. now check teh tension of teh belt. if its ok start it back up and hold the revs up for a few mins. now it will be ready to go for a nice leasurly drive

S34MER · 19th November 2006, 15:08

I have also decided to add the link from Simo's 'How To' section for instructions on FITTING UPRATED CAMS

williamsvts · 19th November 2006, 15:11

it hasnt been mentioned in that 'how to' that you need to tension the cam ladder bolts to 8NM

S34MER · 20th November 2006, 08:03

Have also found a website, which has some FAQ's on cams.....

CLICK>> FAQ's on cams <<CLICK

S34MER · 23rd November 2006, 23:08

another helpful site HERE thanks to Piper

stiffler69 · 29th November 2006, 17:49

Heres a quick question i have installed the piper 285 cam to my vtr am i going to struggle at mot time for emissions reason i ask is it states that maybe it will be a problem on the gmc website thanks.

bullit · 29th November 2006, 20:01

no you wont

williamsvts · 30th November 2006, 10:14

depends how its mapped.

evans1089 · 24th October 2007, 23:48

is it worth doing to a 1.4i?

williamsvts · 25th October 2007, 03:25

not imo.

dan-iow · 26th October 2007, 19:34

hi guys, did post this else where but didnt realise there is a cam section

basically i have a 106 gti and would like to cam it. what cams could i run without having the car mapped, this is due to me living on the isle of wight and not having anyone to do the map.

once iv fitted the cams how do i go about setting the timing up on the adjustable pulleys to get it to run correctly?

what sort of gains would i be looking at on a gti with usal mods... forced induction, decat, exhaust, ported and polished tb, bareing in mind i will be running them without the remap... for the time being anyway

thanxs

dan-iow · 27th October 2007, 15:36

i was only talking about the induction type, as in a bmc.

bullit · 27th October 2007, 18:34

Quote:

Originally Posted by dan-iow

i was only talking about the induction type, as in a bmc.

we know you were. excuse the children. tbh mate you want a map to set the corect fueling etc. if your not gonna map it i wouldnt bother putting them in

DavidKent · 17th January 2008, 21:46

Good Thread...
So what would i gain by fitting my Kent PT40's then?
Got some here, But What else would i need?
I have the Cams and Pulley already...
Would Performance change?
Would I just need to Change the Timing to make it idle right, don't tend to get the general Gist?
Cheers

DavidKent · 17th January 2008, 21:49

Oh yeah, Also, Would it make a difference being on an older engine? 90BHP, as opposed to the 98?
Whats the actual Difference between the 90 and 98's to make the power difference?
David

BENSAX3 · 17th January 2008, 21:57

you could get it to run but would need to be mapped ideally

piggy123 · 20th January 2008, 14:52

imho i think that camming a 1.4 is fine but it has to be complemented by exhaust decat mani induction kit etc.

jono41 · 25th September 2008, 19:36

i live in brum and i was wondering where can i go to get 708cams, wid map, oil pressure regulater and to get the head gas flowed

RCD-Performance · 29th September 2008, 19:57

We can supply and fit 708's, and also produce the predator ECU, which can be fitted and mapped to suit.

PS> There is an error on this thread, you DO NOT idle the cams to bed them in, each manufacturer has there specific ways. for instance PH3's are 20min @ 2250 RPM.