Curious~ Have an extra engine and want to make more HP

[dodger21]

So, with my MMPG build, I am going to be conservative.

But I have an extra engine that is doing "nothing" right now.

So, what improvements can I make to a 1.6 NA to get more HP besides the obvious mods to the IP and a turbo.

I am talking head porting, valve sizing, rods, heads, cams...

I wonder how well it would spin with a 15% decrease in rod length? 

Or how a shorter rod/bigger bore setup will do...

[nathan_b]

15% rod length and you will be smashing the pistons into the head..

Porting would help some with a 1.6na,
not as good as a stock aaz head though,

and still I suspect gains will be minimal without a turbo,

I think the exhaust will be the biggest bottleneck. or the smallest. lol

maybe a cam?

1.6na's suck, sorry. turbo it or something.

[nathan_b]

Oh, I remember a thread where someone took a 1.6na and put a giles pump on it, decent exhaust, and made 75ish hp. Not bad at all.

[dodger21]

If actually read this, I said "besides the obvious"

I know Giles, turbos, etc.

I am talking an actual build.

Also since when does a 15% decrease in the rod LENGTH equal piston slapping heads? It puts the piston below the deck...

Please read before posting. 

[RabbitJockey]

shorter rods will actually make revving worse, you'll still have the same stroke but much harsher rod angles

[wdkingery]

sell it to me and i'll sell you my turbo!

i'd love to have a fresh NA.. 

[8v-of-fury]

LoL.

People have been modifying 1.6's since like 2 years after they came out with them. They are the obvious upgrades because they are the only ones that matter. Everything else is completely useless.. Do all that stuff in addition to a Giles pump and Turbo? + Intercooler? Now your making power.

There is nothing that will make power on a 1.6 N/a other than the "obvious stuff".

Sorry.

I mean best case, put an AAZ head on, big exhaust, huge cold air intake, Governor Mod, and drive the piss outta it. You might break 63hp

[theman53]

The aaz head on an N/A may make less power...not enough velocity.

Porting to increase velocity and Bigger intake and exhaust tubing make worlds of difference in these engines, and that isn't so obvious.

[nathan_b]

Since velocity is relative to volume and space, if you ported it, you would lose velocity unless you increased volume correct?

Don't really see how an aaz head can flow worse than a ported 1.6..

And sorry about my rod post, coulda sworn he said increase at one point..

[theman53]

I did not say it didn't flow worse, it will flow better on a Turbo engine. On a non turbo the engine relies on the piston to suck the air in. In that case it would have LESS velocity in the air charge. Same would be true if it had bigger valves.
The shape of the port has more to do with velocity than the size and volume. Bigger will move more air but a taper will move the air faster....hope I make sense.

Like I said as well, MAY make less power. I haven't done it. Only in theory and talking with my guy that has a flowbench and does this better than I do

[R.O.R-2.0]

you can take a n/a, and make almost-stock-1.8-8v power out of them, and they are pouring coals to be doing that..

like jeremy said, its the OBVIOUS things that make these things have tons of power..

i had nothing more than a modded n/a there for a while.. big intake and exhaust, dual downpipe, NITROUS, turned up fuel pump, and some other things..

still wouldnt touch what it would do when i turbo'd it..

and recently i added an intercooler, and cranked my fueling up as far as possible.

now, first gear is totally useless, and so is second.. you really gotta go easy on the throttle.. the right foot needs lessons in traction control.

and i have nothing more than the list of OBVIOUS modifications..

[dodger21]

Goodness!

Port and polish turbo intake is going to be done!

I am asking about valve grinds, boring, cams, smaller pre cups.

[R.O.R-2.0]

Goodness!

Port and polish turbo intake is going to be done!

I am asking about valve grinds, boring, cams, smaller pre cups.

well, smaller pre-cups are counter-productive if you want boost..

what is a "port and polish turbo intake" ?

dont bore it out unless you need to, boring is not a good way to increase power on an engine this tiny..

valve grinding? what are you expecting performance wise from a valve grind? it just allows the valves to seal in the head better..

Giles does make performance cams for these engines..

look in the FAQ section, theres all you would EVER need to know about making your n/a faster, or converting it to a TD..

[dodger21]

I have read and re-read the FAQ.

I see this is going no where. Sorry I brought it up.

[R.O.R-2.0]

So, with my MMPG build, I am going to be conservative.

But I have an extra engine that is doing "nothing" right now.

So, what improvements can I make to a 1.6 NA to get more HP besides the obvious mods to the IP and a turbo.

I am talking head porting, valve sizing, rods, heads, cams...

I wonder how well it would spin with a 15% decrease in rod length? 

Or how a shorter rod/bigger bore setup will do...

well, had you asked a less-vague question, you might have gotten better answers..

why would you want to make your engine have shorter rods? thats just going to make the rod speed & angles more extreme. longer rods would be the way to do this, but a VW diesel is not limited by the bottom end, its limited by the injection pump.. ~5600 is pretty much all the more you can spin one of these things..

and why would you want to build power without boost? that just doesnt make much sense to me.. you dont need to perfectly port your head when you are CRAMMING AIR THRU THE PORTS.. sure, it helps, but no port and polish job is even going to come close to what a turbo or supercharger will do..