More power from a 1.8 k-jet engine in a 80 sport - Page 3

murran · 26-01-12, 07:13 PM

wish i had some more pics of the work i did on that golf. sadly this all happened pre-internet access/forum involvement, so never really bothered taking pics.
was one of the first things i ever bought off ebay for £104. was a total shed. from a bent driveshaft to a new clutch, new back panel welded in, heater matrix, fitted rainbow interior, rebuilt the sunroof with a new rear drip tray and seals....... jamex springs and shocker kit. green stuff pads.
sorry im getting off topic!!

yeah the kv throttle body is much bigger.
i couldnt really tell you want difference it made on its own as i fitted it at the same time as the cam! doh. was much more grunty at the top end.
also my mate had an mk5 escort gti 130. was never able to keep up with him on the road..... after the cam and stuff i was able to keep right under his bumper!

from memory i had to mix/modify/swap some little brackets for the throttle cable. i swapped the tps too, but i cant remember if this was cus it was different of cus the kv one came without a tps.
removed the inlet to bore it out, took about half an hour ish to die grind it out.
if you put a kv body next to a gti one the difference is huge.

B2AUDI80 · 26-01-12, 08:18 PM

yep the kv throttle body is larger as murran says, ive a kv one there for my sport , whenever i get round to fitting it

it was actually a popular mod by mk1 golf owners years ago

Rickman · 29-01-12, 02:19 AM

My friend and I did the 2.2 kv throttle body and warm up valve swap on his 1.8 8v mk1 Golf. Advanced the timing to 17-18 degrees (a large advance from 12), used a solid injection air pipe to stop collapse under heavy throttle and finally drilled many 3" holes through the bottom of a rs turbo air box. Standard 1.8 engine on a 1.6 gti box.

Supposed to give a genuine 8-10 hp, I can tell you it makes all the difference as the first butterfly @ 2.2 is the size of the second @ 1.8, but the the second 2.2 makes both 1.8 butterfly's look small.

The milestone test was a short hill on the way to his house. In standard trim with 1.8 parts the car peaks the hill flat in 2nd. After the part swaps and the advance, the car peaks the hill somewhere in 3rd.

End result, instant hard power in any gear up and beyond the profile of the cam (8000rpm).

K Simmonds · 29-01-12, 10:36 AM

The best route to more power with Four pot K-Jet motors, 16V or 8V is more displacement using a SHORT STROKE bottom end, 6A/9A for 16V's or 3A/AAD for 8V's, for example, combine these with head work for excellent results.

These are just the common ones, many others are out there, though not all in the UK.

There are quite a few other VAG models for the late 80's and early 90's with variants of the 2.0 short stroke bottom end. These are basic but useful guide's to what you might find hiding under the bonnet of various Audi's or VW's either in scrappers or just going cheap. Pity the these list's don't tell you how many cylinders or valves the engines have as there are quite a few five pot 2.0 engine to confuse matters. But still, with a bit of cross referencing and research you will find easy answers.

http://www.autoshoppingcenter.com/Vo...ginescode.html

And that's just the Audi units

Here are the VW ones,-

http://www.autoshoppingcenter.com/Vo...ginescode.html

One of these bottom ends combined with some basic head work/multi angle valve seat cutting plus good assembly practice such as matching up manifolds ect is far and away the most effective solution.

Forget the latter long stroke blocks, they don't like to rev unless heavily modded and don't really fit properly in a car that had a 1.8 short stroke bottom end as standard.

K-jet can be made very reliable at the higher flow levels involved, the warm regulators can be tweaked as can the metering heads. There is also much choice when it comes to injectors. Going Common rail with EFI is unarguably better, especially when it come to economy but is far from being essential for good results.

Carb's and individual Throttle bodies are a waste of time unless you REALLY know what you are doing and have cams custom profiled to suit.

b2_sport · 29-01-12, 08:55 PM

kents cams do one for the DZ, 10hp gain £194.00 +vat as of 25/01/2011.

Wonder if they would do anything for a group buy, who else is interested?

We could even have a dyno/tune up meet in the near future, i know theres a few 80 sport owners here...

SteveT63 · 29-01-12, 09:10 PM

I'll have a word with Ben at Shark. He might like the idea of a Retro Rolling Road Day. Bapro set up at his place and plenty of space for the BBQ as well.

www.sharkperformance.co.uk/

26-01-12, 08:18 PM	#22
B2AUDI80 B2 Brigade Classic Audi Club Member Join Date: Jul 2010 Location: here and there Posts: 2,778	yep the kv throttle body is larger as murran says, ive a kv one there for my sport , whenever i get round to fitting it it was actually a popular mod by mk1 golf owners years ago __________________ www.northernretros.co.uk 1984 80 Sport 1970 hb viva 1983 Honda Odyssey 250 1981 Suzuki 450 GS 1980 t25 danbury

29-01-12, 09:10 PM	#26
SteveT63 Senior Member Classic Audi Club Member Join Date: Sep 2008 Posts: 3,045	I'll have a word with Ben at Shark. He might like the idea of a Retro Rolling Road Day. Bapro set up at his place and plenty of space for the BBQ as well. www.sharkperformance.co.uk/ __________________ Peace...........through superior acceleration! T85 1985 90quattro I5 20vT T81 1983 80 Sport Red T81 1983 80 Sport Silver

26-01-12, 07:13 PM	#21
murran Grown up member Join Date: Nov 2011 Posts: 359	wish i had some more pics of the work i did on that golf. sadly this all happened pre-internet access/forum involvement, so never really bothered taking pics. was one of the first things i ever bought off ebay for £104. was a total shed. from a bent driveshaft to a new clutch, new back panel welded in, heater matrix, fitted rainbow interior, rebuilt the sunroof with a new rear drip tray and seals....... jamex springs and shocker kit. green stuff pads. sorry im getting off topic!! yeah the kv throttle body is much bigger. i couldnt really tell you want difference it made on its own as i fitted it at the same time as the cam! doh. was much more grunty at the top end. also my mate had an mk5 escort gti 130. was never able to keep up with him on the road..... after the cam and stuff i was able to keep right under his bumper! from memory i had to mix/modify/swap some little brackets for the throttle cable. i swapped the tps too, but i cant remember if this was cus it was different of cus the kv one came without a tps. removed the inlet to bore it out, took about half an hour ish to die grind it out. if you put a kv body next to a gti one the difference is huge.

29-01-12, 02:19 AM	#23
Rickman Grown up member Join Date: Feb 2010 Location: South Cumbria Posts: 122	My friend and I did the 2.2 kv throttle body and warm up valve swap on his 1.8 8v mk1 Golf. Advanced the timing to 17-18 degrees (a large advance from 12), used a solid injection air pipe to stop collapse under heavy throttle and finally drilled many 3" holes through the bottom of a rs turbo air box. Standard 1.8 engine on a 1.6 gti box. Supposed to give a genuine 8-10 hp, I can tell you it makes all the difference as the first butterfly @ 2.2 is the size of the second @ 1.8, but the the second 2.2 makes both 1.8 butterfly's look small. The milestone test was a short hill on the way to his house. In standard trim with 1.8 parts the car peaks the hill flat in 2nd. After the part swaps and the advance, the car peaks the hill somewhere in 3rd. End result, instant hard power in any gear up and beyond the profile of the cam (8000rpm).

29-01-12, 10:36 AM	#24
K Simmonds Senior Member Classic Audi Club Member Join Date: Dec 2009 Location: Mid Wales Posts: 1,060	The best route to more power with Four pot K-Jet motors, 16V or 8V is more displacement using a SHORT STROKE bottom end, 6A/9A for 16V's or 3A/AAD for 8V's, for example, combine these with head work for excellent results. These are just the common ones, many others are out there, though not all in the UK. There are quite a few other VAG models for the late 80's and early 90's with variants of the 2.0 short stroke bottom end. These are basic but useful guide's to what you might find hiding under the bonnet of various Audi's or VW's either in scrappers or just going cheap. Pity the these list's don't tell you how many cylinders or valves the engines have as there are quite a few five pot 2.0 engine to confuse matters. But still, with a bit of cross referencing and research you will find easy answers. http://www.autoshoppingcenter.com/Vo...ginescode.html And that's just the Audi units Here are the VW ones,- http://www.autoshoppingcenter.com/Vo...ginescode.html One of these bottom ends combined with some basic head work/multi angle valve seat cutting plus good assembly practice such as matching up manifolds ect is far and away the most effective solution. Forget the latter long stroke blocks, they don't like to rev unless heavily modded and don't really fit properly in a car that had a 1.8 short stroke bottom end as standard. K-jet can be made very reliable at the higher flow levels involved, the warm regulators can be tweaked as can the metering heads. There is also much choice when it comes to injectors. Going Common rail with EFI is unarguably better, especially when it come to economy but is far from being essential for good results. Carb's and individual Throttle bodies are a waste of time unless you REALLY know what you are doing and have cams custom profiled to suit.

29-01-12, 08:55 PM	#25
b2_sport Grown up member Classic Audi Club Member Join Date: Apr 2009 Posts: 820	kents cams do one for the DZ, 10hp gain £194.00 +vat as of 25/01/2011. Wonder if they would do anything for a group buy, who else is interested? We could even have a dyno/tune up meet in the near future, i know theres a few 80 sport owners here...