Vernier pulleys..?

19th November 2007, 19:34

Im after some info on vernier pulleys. I understand that the GTi/VTS already has adjustable pulleys but is there a greater precision for setting up timing with the Vernier's? Also does the cam timing get setup on a rolling road or is it best to get the best settings setup before and then they get tweaked on the RR? Thanks.

19th November 2007, 19:36

VTS/GTi comes with adjustable VERNIER pulleys mate.

19th November 2007, 19:46

You won't need to setup stock camshafts on the rollers. Performance camshafts use "valve overlap" to increase the speed at which air / fuel enters the cylinders, and the speed that the exhaust gasses exit. Getting the timing and overlap correct with performance camshafts needs to be done on a rolling road for optimum performance.

19th November 2007, 21:50

Yea i understand that the GTi's and VTS's come with adjustable pulleys but ive read that there not as precise and as easy to setup as specific aftermarket jobbies. Was also wondering if there are any other benefits?

I wont be timing up standard cams they will be Newman PH3's. So when the cams get put in they get set to standard timing or a timing in which they will run without stalling? and then tweaked on the RR? Ive been looking at the catcam pulleys which are supposed to be harder wearing and easier to setup. The reason im asking is because i dont like to do anything by halves and wont the car to be aswel setup as it can.

19th November 2007, 22:22

there lighter but whether there any diff warrenting 200 pound. i have a set cause wanted the pretty colours but lots dont bother changing them. your best ringing a rr up i think or gmc etc

yeah as you said your timing will be adjusted to suit and then tweeked proper on rr

19th November 2007, 22:40

Stick with the stock pulleys, they are good, and actually, I beleive they are stronger than most aftermarket jobbies.

Camshafts like 708s and PH3s, will have a specific timing recommended for them by the manufacturer. You should install them by this timing initially, as it will be safe. Then you will need the cam timing adjusted on a dyno, as well as your engine mangement setup. You will need to either have your current ECU re-mapped or a standalone ECU setup. I don't recommend the re-map of the stock ECU, unless you are on a serious budget. If you want the best results, get a proper ECU. DTA, Omex, Emerald to name but a few...

19th November 2007, 22:52

what about dastek.what are they like with cams?

19th November 2007, 23:42

Thanks for the replies people. I would go standalone if i was a single plug but unfortunately im a 3 plugger and theres not a chance im paying £1000 to get mine converted! Think im going to use the new Q Unichip tbh.

20th November 2007, 08:28

A Dastek is old news. It's not an ECU either. It's a piggyback device which wires into your existing ECU. Now that there are a number of places that can re-map your stock ECU, this device is now pretty much redundant.

That's up to you Dibz, but you will be kicking yourself in the long run.

20th November 2007, 13:32

Im not so sure tbh mate, Ive heard of quite a few people who have cams and a dastek q unichip and there all happy. I think ill be happy to with this setup. Obviously if i had a single plug ecu then i would defo go standalone but as im not going to be doing anything else to my car after this i cant see the point paying upto £1000 to get standalone. Thanks for the input

20th November 2007, 13:51

If you're not doing anything else to the car and you're on a budget, then get the stock ECU re-mapped.

20th November 2007, 14:58

std pulleys are perfectly fine, ur mapper would have to be an ejit to not be able to adjust them properly

20th November 2007, 15:08

Lol fair enough! Il leave the pulleys standard then. Itl either be dastek or standard ecu remap.

20th November 2007, 15:53

Quote:

Originally Posted by Dibz

Lol fair enough! Il leave the pulleys standard then. Itl either be dastek or standard ecu remap.

depends how far you are gonna go, and if you can pick up a s3cond hand dastek tbh.

you could get a bargain

20th November 2007, 16:05

Im only going to go as far as cams for definate. Dasteks are cheap at about £450 inc mapping and fitting anyway. Dont really fancy buying a second hand one which has already had the wires chopped into.

20th November 2007, 17:00

cams for definite

toad said that lol

20th November 2007, 18:03

could there be any diffrence in bhp from standard ecu remapped to a new one like omex ??

20th November 2007, 19:22

same as above
and also what is the best standalone system for a my single plug vts?

all im doing is full system,intake and cams.

which would be most popular and which would be easiest to map

20th November 2007, 20:13

Quote:

cams for definite toad said that lol

It really will be the END for me in terms of mods. Dont see the point going any further and starting to spend silly money. Im after a Integra DC5 in about a yrs time.

21st November 2007, 10:09

Quote:

Originally Posted by lil-daz-vts

could there be any diffrence in bhp from standard ecu remapped to a new one like omex ??

Potentially, yes. But it's more to do with the superiority of the Omex, and what this gives as a plus. There's a lot more to mapping than just power. Think about it... From what point in the rev range to you give WOT, how will the car react, etc, etc. Letting off certain amounts, and then back to WOT, etc, etc.