Injectors

Mitsiman · Post by **Mitsiman** » Thu Jan 05, 2006 10:37 pm

At this stage there is no way to garauntee any gains - simply because no one has done a naturally aspirated grind on the fto vehicles yet. WE have done lots of turbo and supercharger profiles which have turned out very popular and are providing exceeding good results. Mind you we are able to cheat there a little - we are using on the high rpm lobes a stock 6A13 DOHC Turbo cam profile which is perfect for the smaller 2.0 engine as its equivelent to being a large turbo profile.

I have manafactured the billets and have some recomended grinds we have used on a lot of other engines - but ultimatly, and I still say, the stock 2.0 FTO vehicles do not need a larger profile for the n/a vehicles unless they are virtually full race. Without increased compression, some major head work and manifold work - I honestly do not beleive cost V gain ratio that a set of improved high rpm camshafts would be of any great benefit as the secondary high rpm cam profile is already very large already.

main benefits I woudl forsee is to increase the low rpm profile by a smal factor say half a grind to smooth out the low to high rpm transition and give the car some more poke down low. But again - cost V gain benefit ratio - not there.

This is the main reason why I have not pushed any camshafts for the n/a FTO vehicles unless someone is going very very serious on the engine with much higher compression where you can go to a very large camshaft profile where you are planning on staying in the high rpm range all the time.

Thats my honest opinion - and as you can see I am not trying to sell a product to make money here - I have looked and seen enough , done enough research and that is what I firmly beleive.

So question is if you want a new set of camshafts, no problem, I have suggested profiles or if your engine builder has a preferred profile then tell us and we are happy to grind it to whatever profile you want which is really at this stage the best way to do it.

If after reading this you still want a set of cams, gears etc then contact me normal emails and we can go from there including pricing.

spetz · Post by **spetz** » Fri Jan 06, 2006 4:29 am

This is a very difficult situation

I would really want a very quick NA car. But I really do need to be assured of the gains. And for the price they do have to be substantial gains.

Mitsiman, do you know if it is possible to use 4G92 MIVEC pistons in a bored 6A12? I heard by using them, CR increases to about 11.5:1 and capacity goes up to 2.13 litres, in which case I am guessing by this time it would be a good idea to put in cams?

Mitsiman · Post by **Mitsiman** » Fri Jan 06, 2006 11:54 am

You could theoretically use the 4G92 pistons but hte main problem would be the valve releifs in hte pistons would be in the wrong positions and not the correct sizing. Not something I would do.

I would need to check capacity but not sure on engine increasing capacity.

I would if you want more compression, get a proper set of mivec high comp pistons made and do it properly with the correct valve releifs etc.

spetz · Post by **spetz** » Fri Jan 06, 2006 9:53 pm

How much do they cost?

And what sort of performance benefits would there be? Is it worthwhile?

Post by **Bennoz** » Sat Jan 07, 2006 2:31 pm

spetz wrote:How much do they cost?

And what sort of performance benefits would there be? Is it worthwhile?

I got quoted $1500 for hi spec pistons for my blown motor.
All good & well, but your talking about stripping the motor to its bare bones to get at them. Factor in cost of complete engine out, strip & put back together. Also if your going to go to that stage, its best to 'protect' your investment in the pistons by getting forged rods to hold onto them...

As Mitsiman verged on, this is the prob with big horseys & NA.... so much coin for so little gain.

In the old days the saying was "You cant beat cubes" - reffering to engine capacity

These days its "You cant beat pounds" - reffering to boost

Its been on my mind to post up the specs of my mini motor... you'll then see whats invovled in making a NA motor go hard..

Plus the *cough* 60K *cough* I spent on that motor

spetz · Post by **spetz** » Sat Jan 07, 2006 11:13 pm

The engine is already stripped and in pieces.

At this stage the only internal modifications to the bottom end have been shot peened rods, blueprinting and balancing

Unfortunately I know this is the best time to do any sort of other work but money is always an issue.

Any recommendations of what else to do? For decent improvement gains?