Power?

[Spyda]

Just want to get a rough idea of how hard it would be to get about 150hp out of my digi 8v.

I was thinkin later down the track, (more of a dream realy):
Chip
2L bottom end
Full exhaust
maybe port and polish da head with biger valves and different cam

bigger injectors? throttle body??

What do you think?.... Im unsure how hard it is to reach 150hp.

[h100vw]

Head work for sure with big valves, do a 1900 bottom end, the 2 litre doesn't rev too good. I know cos I did one myself a few years back and it wasn't a patch on the previously fitted 1800.

Cam and vernier, 285 for a road motor and longer for more track bias.

Headers.

Chip to get the fuelling correct.

My 1800 did 177 at the crank on K-jetronic. 166 as a 2 litre.

Gavin

[Spyda]

Bore it out to 1900? What does that cost. I have to change the cylidners dont I?

vernier?

Where can i get a chip from? Im guessing an ebay chip wont do.

What did it cost you, roughly, to get that 177hp?

Oh and how was it on reliability?

[static1800]

you can these TT chips froms bahn brenner $100 US

http://www.bahnbrenner.com/vw_audi/Plug___Play_Eproms/Techtonics_EPROM___Digifant_2.html

Imagine they would be better than the ebay powertech chips, but can't say for sure.

One thing i am doign that will help you is changing the afm to a bmw unit. My mate has one im trying to get off him. They're off of a 3.5 litre 6 cylinder bmw engines. You just need to loosen the spring rate on the flap 7-8 clicks and it's good to go.
BMW AFM vs VW AFM Size comparison

The Door measurements:
VW AFM 2" H x 2 1/16"th W /50mm H x 52mm W
BMW AFM 2 9/16"th H x 2" W /65mm H x 50mm W
Inlet Sizes:
See Door Measurement for VW AFM
BMW AFM 3" or 75mm in Diameter
Outlet Sizes:
VW AFM 2 9/16"th or 65mm in Diameter
BMW AFM 3" or 75mm in Diameter
This is the Inlet Ring that comes with the BMW AFM, so you don't have to deal with using round hose on a square hole.

[aliasmk2]

Hi static,
did you trade your ebay chip for a techtonics
the bahn brenner one in the link is for digi 2 ?????????

& do you know if there is any difference in the 325i afm compared to the 325e

the 325i revs a lot harder & is faster than the 325e, but the e seems to have much moer torque

thats what the poor fools who drive them say!!!!!

[static1800]

No I didn't trade it, i have been curious about them though.

BMW used the same afm on some of their 4 cylinder models which are the same as the VW units or very similar. Don't know the difference just know i want one of those big bmw units

Need to bug my mate more and i will put somethign up on the forum when i install it.

[peedman]

Are u dead set on keeping the 8v? Stock 16V ABF is supposed to be about 150HP and would be bang for buck IMO. The 9A is also a good baseline which is what ill be working with. My plan is:

Cams
Cam gear
ITB
Standalone ECU
Exhaust
Mild port + polish work

Hoping for 170HP in my mk3

[aliasmk2]

It should be easy to get 1 & affordable, there are heaps of those BMW's starting to to get wrecked atm
I have heard they help the ol digi' a lot !,


I think it would be cheaper to put a 16v in, than build up a 8v overall though

Have you got a thread on your kr?

I am thinking of doing the same, it will be the next job when I get my girling 60 brakes sorted out

my new 16' simmons wont handle the 280mm calipers ( i hate that)

[aliasmk2]

ABF is probably the best 16v, but really hard to get & will always cost more

why not go all the way & consider a vr6, because once you start spending money on head work you will be in the same cost area, with the better part of 200hp

[peedman]

Its something about the 16V and how they are rare as bat poop that gets me excited. A VR6 in a mk3 is nothing since they came like that factory but in a mk2 would be worth considering if the budget stretches that far

[ausgolfer]

Bore it out to 1900? What does that cost. I have to change the cylidners dont I?

vernier?

Where can i get a chip from? Im guessing an ebay chip wont do.

You don't have to change cylinders, but you do have to change pistons which can be expensive.

A vernier is an adjustable cam gear that you can use to change your cam timing to give you more power for the track or more low down for the road.

I would never get a chio from ebay, it won't be suited to the modifications of your car, I'd only go with a brand that has a long and close association with VW's or standalone management which is alot more expensive again.

It's best to really think about what you want more, you could do a 2L bottom end, extractors, exhaust, chip and some head work and you'd have a torquey rocket with about 130hp. It might not seem like that much more power but it would fly compared to standard.

If you want a race motor and are chasing power it'll cost you heaps and reliability will be an issue.

On the other hand you could as many have said get a 2L 16v which has 150hp out of the box. A few extras on that and you're looking at 170-180hp no probs.

See it's easy to add about 15-35hp(ofcourse depending on the type of motor) to most motors with a little bit of work. More then that and you need to consider carefully what you want and what will get you there the most efficiently. In some cases an engine change will be far cheaper than buiding a race spec 8v, it just depends on what you want.

[ausgolfer]

ABF is probably the best 16v, but really hard to get & will always cost more

The only thing thats better about the ABF over the 9a (both 2l 16v's for people who don't know) is that generally they're newer (out of newer vehicles, not a newer design) and they have slightly better ports nothing a mild porting wouldn't fix and wilder cams than the 9a. Otherwise it's debatable as the 9a is a bubble block with a shorter stroke and can rev harder(when given the cams) and better than the long stroke ABF.

[static1800]

why not go all the way & consider a vr6, because once you start spending money on head work you will be in the same cost area, with the better part of 200hp

heaps more work for one , they only just fit in and i'm of the opinion they are to heavy for a mk2. Would just understeer heaps i reckon.

[Spyda]

Id love a vr6 in my mk2. Dunno why...probly because of the sound and the 2 extra cylinders

An ABF would also be great.

Main problem is money....damn money, thats why i thought it would be better just to squeeze a bit more power out of the 8v. I was disapointed to find out the aussie mk2 is only 77kw. Id be happy with a full exhaust, cams and modding the air intake untill i can get sorted and one day do a vr6.

Ive heard from many that the mk3 2l doesnt rev well. Why is that?

[evorobin]

Guy I bought my eibach sways from in the UK went from a std 16v (139hp) to a (different car) TSR big 8 valve (140+ hp) and reckoned it was nowhere near as good. Coming from an 8v that made nearly 100hp at the treads I'd agree!

Infact I've only seen one mental 8v and the guy had spent $10K on the engine. Was good though