Just Got Edited...

[bjcrown]

Just Got Edited...

I have attached dyno charts, but to me I dont have much of an idea what exactly they mean. I just want someone that knows what the numbers actually mean to tell me if everything is in order.

Now I own a BA MKII Turbo 4 speed Auto. I didn't want to mod my car too much but just wanted a safe tune. The only mods I have done are: typhoon CAI, auto trans cooler and NGK BKR6E spark plugs (.8mm gap). Oh, I am using BP Ultimate (98 RON).

Even though I am happy with the power change (from stock), I was a little dissapointed that I didnt even get to the 220rwkw! I expected around 235rwkw like most get from stock. My tuner tells me that the valves springs have let me down as they are too weak. He wanted $800 for fittment of valve springs with a re-tune.

Now my question is:

Is it worth doing the valve springs? Would I notice more power? Again I dont want to mod my car any further - like CAT's, exhuast, injectors, intercooler etc.... And nor do I thrash my car or do I really ever exceed above 130km. Hence, I don't race my car but love the take off to 100km/h or so!

Can someone please offer any advice as is it really worth forking out another $800 for another 20rwkw at top end I guess!

Thanks heaps...

[BFHOON]

its a bit of a lucky dip with valve springs, some are good some arent so good.

can I ask who tour tuner was.

looking at the chart the torque is much better down low, must be better to drive now

it may be needed to get a second opinion from a nother tuner.

[BAturb]

get a good high flow cat, the better flow will be better on the valve springs and may just get you the 235rwkws you are after

[byi]

I had a simular problem that my valve springs prohibited suitable power gains. After receiving advice from Paul at Elite Auto a set of Cobra springs were installed and voila instant results. I would listen to the advice of your tuner

Cheers,

Edited 09/06/07 08:05 AM by byi

[dalts]

unfortunatly trying to make power costs money,its like a jigsaw puzzle every little piece helps in the long run,good luck with it all

cheers lee

[Guest bluprinturbo]

its rare to hear of valve spring dramas with these power levels.I had my 130,000km 2003 ba turbo edited and got 244rwkws.I think its worth a second opinion too.where are you situated and who tuned your t?if your in brizzy I wouldnt go anywhere else except redcliffe dyno.

[RAPHOON]

get a good high flow cat, the better flow will be better on the valve springs and may just get you the 235rwkws you are after

I tend to agree.

The reduction in back pressure will help your valvesprings along although they seem to be very soft. Do you have a boost graph?

[Fat-Tony]

I wouldn't bother with anything unless you are intent on changing those injectors. Both go hand in hand for gaining power up top, change the valve springs and there is no where near enough head room in the stock injectors to make use of them and vice versa.

Its impossible to make a determination as to why your car is lacking in power, what kind of a difference valve springs would make without actually knowing what timing and boost values have been inputted any information offered is just a guess. For all we know your injectors could be maxed out at that level and thus hampering any further efforts to extract power from the car without running it lean and unsafe.

Do yourself a favour and go for a spin in a car that has valve springs and injectors and I can be certain that you will want to atleast modify your car to that level and have a better understanding of what those modifications do for you up top in the power curve if tuned properly.

[tquarrell]

I have stock valve springs and am a little surprised that the valve springs are limiting you more than the injectors... I'd visit another tuner first and get their thoughts before doing anything as I'm reluctant to believe the valvesprings are the problem. BTW injectors and intercooler were less than $1000, if you want more power I wouldn't rule them out.

[PepeLePew]

I thought Mk1s had fairly consistent issues with springs and MK2's were better????

$800 with a retune sounds pretty ok though....

BUT...does it look odd that when 'old' peak power is reached it starts to fluctuate on the 'new' curve?

Its almost smack on the same power...second opinion from another tuner dude...