tt kit + race cam = madness????

i have a race cam for my mk1 golf 1.6 gti and have just purchased a tt kit for it also… would it be mad to fit the race cam with the tt kit?


thanks

ronan

Yes, too much overlap for it to be any good imo

turbo cars don;t like large amounts of overlap  :wink:

hi, your the guy  i wanted to talk to actually….  got a tt kit off here for my golf 1, what do/ should i need to make the engine as strong as posible to take the turbo..


would  porting and polishing the head make  any diference?

Porting would inmprove fuel/air flow in and out of the head, pollishing is not a good idea tho as this causes 'pooling' of fuel because it doesn't mix with the air properly.

Idealy you need to lower the compression either by fitting differnt pistons, having your pistons machined down or havine the head chambers enlarged.

rich what would the cheapist option be out of thse three???  is the air cooled oil cooler ok to use?

ronan

yeah cams wont be to effective on a turbo engine in this instance , what your doing is changing the engines characteristics from suck squeeze bang blow to just squeeze bang blow . although the 1st stroke is still there the engine doesnt have to labour to suck fuel in cos the turbos force feeding it .
I would agree that porting will help . i never polish the ports when i tune 2 strokes cos it does affect the fuel atonomisation on the shiney walls , the fuel can litterally condesate and turn into droplets rather than a gas . at the moment tho ur experimenting so only ever change one thing at a time . id leave the head for the moment , just strip it down and clean it up and check all the tolerances .
Id look at sourcing a thicker copper head gasket and non stretch head bolts 1st . this will lower the compression and hold the head flat and prevent warping under high boost levels . possably try colder plugs aswell to avoid detonation . run a good fuel like optimax aswell .
If you can source a bigger oil cooler that would be a good move as the oil/ water coolers often break and mix the 2 . i dony know if u have a roller bearing or floating vein turbo but water/oil going in there is not a good thing  !!
I think the 2nd bits to source would be a bigger oil cooler and plenty of lagging . most failers are temperature related so you wanna keep temperatures down .

When TT first built the 1.6 Turbo kits they ran on standard compression with standard head gasket. It wasn't untill they developed the 1,8GTI version and the later MK2 Kits that they started to alter compression ratios, but this is all dependant on the amount of boost you intend to run thru the engine. Interestingly the original TT kits were actually based around Shrick kits from Germany, I have the original leaflet here for the TT+Shrick kits produced.

One other thing to remember is more boost = more igntion retard, and therefore doesn;t necesarily mean more power. Mine will produce as much BHP on less boost, but that's another story.

Porting and polishing of the head: ummm, always a great debate on forced induction cars as the area to improve in theory is the exchust ports as air is forced in anyway so therefore not much improvmenet would be had on thsi side, but TT did do a ported head for the "Full house" kits as they were referred to.

Oil cooler: TT Kits always ran the Air cooler versions on the MK1's, but with an uprated mocal version - I can check my car if needs be for the number of rows etc etc.

Hope this helps. :wink:

Yeah the head will be fine as is for the moment . To calculate how much material you would be able to remove from the ports to boost flow without loosing any velocity would take alot of measuring and be very time consuming . the way to think about it is like a tap , 10psi of water will flow faster out of a 10mm hose than it will out of a 20mm hose , more may come out of the 20mm hose but itll have less velocity behind it and thats what your after . velocity . then you have to consider valve sizes and the restrictions of valves that are too big , squish band areas and valve seat sizes . Leave her standard mate , it will consume your mind for months .!!!!!

it may be worth sourcing a thermo switch with a lower heat rating too , so the fan kicks in sooner . you can induce problems by cooling too much      ( By dropping combustion temps too low )sometimes but i think we`d be better to foul a few plugs than burn any valves out at this stage !

newman cams will be able to help the would knock you one up based on a fast road g60 profile :wink:  :wink:  for about 160 notes :wink: