My 2.0 8V conversion - Another update (28/08/2006)

[butler1]

thanx will do that.

[vrooom]

Let me be the last to say WOW BRILLANT Tread ..... let me just say ... i am now a 8v specialist after reading this tread, thats even taking into consideration that i cant even use a spanner properly..... any one need help

MACMAN, advice please, i want a more revy engine, curently a 2.0 8v MP9 276 cam, dyno by Zabka..... i need (want) to enhance acceleration at a lower stage but not lose much on the higer stage, do i get the dyno done at peeps who done yours or ????

these damn VTEC's i giving me grief i tell you, damn Standard 1.6 engines

balancing the bottom end , what exactly will i be getting out of this???

i cant belive that fuel consumtion on my GTI i am getting like 140km on a R200, and thats driving like a women...

i also wanna chow Super Boss what do i do

anticipating your response

[ngoako7]

This is a great detailed post by MacMan, and have to say I adore your work. Most of the time I see these kind of threats on the vortex.com site, and it's good to see that we can do it too.

I have a 1.6 8v Carb with a 276 deg cam + Exhaust, no major mods yet, and I'm happy with the performance so far. I think i'll be going this route as well, soon as the budget can accomodate me.

I give you 110/100 for this post, and very inspiring btw.

Enjoy the sweet ride..

[voorat]

going through this thread I have to say Macman BIG UP 2 bud for a really realy nice rebuild that you did. Your attention 2 detail is realy awesome. I hope you enjoy you're cabby and get many many pleasurable miles from it. Congrats for building a strong 2.0l 8v.

I also would like to say 16V does have a point but went about it all wrong !! I built a 1920cc 8v motor +-13years ago and let me tell you at the time the UNO Turbo's,325IS,328I and V-tec couldn't touch me. It was a HIGHLY modified 8V engine.

My mate bought 1800 16V engine with the idea to convert it to 2.0 and turbo it. He didn't have a lot of money and we ended up puting it into his 2 door as it was. Afterwards he and I went heads up and he trashed me with about a car length. Please bare in mind my car was running 11:1 compression with 84mm pistons with a 288deg cam and a wild head job. I think the point 16V was trying to make is that you can get better performance out of a 16V engine for less money and personally out of expierence I have to agree.

Anyway still I can understand why Macman still went the 8v route and from reading all the comments I have to say that the fuel economy that increased is an impresive point and seeing that he uses this car everyday it's an awesome conversion to do then.

my 2 cents

[Dirty Harry]

Awesome build macman!Really awesome.Just a quick q,where did you get you parts balanced and does this really make a difference in your performance and what way?THanks.

[DUBPOWER]

Great build Macman just read yr entire thread today! Im a big fan of the NA 8v motor and with the power that one can sqeeze outta these motors.Mine made 112kw and 204nm on the wheels with weber 40s sidies, ran a best time of 15.01 with 95 pump fuel at the coast. And the best part is i used the car for work everyday. My mates golf 2lt 8v NA ran a new best time of 13.01 at the coast, meathanol and 45s sidedraughts.And the most weird part is hes car makes 94kw at the wheels? I seriously cant understand that? Anyway well done Macman and keep up the good work!

[GOL500-GP]

Excellent read McMan.
Just wanted to know what size injectors you used, and did you replace the original TCI module?
My Mk1 conversion is almost done, from a 1.3 carb to a 2.0 8v with throttle bodies and the "so called tuner" says he needs to replace the TCI unit and he also needs 320cc injectors?

Would that be correct?

[MacMan]

Excellent read McMan.
Just wanted to know what size injectors you used, and did you replace the original TCI module?
My Mk1 conversion is almost done, from a 1.3 carb to a 2.0 8v with throttle bodies and the "so called tuner" says he needs to replace the TCI unit and he also needs 320cc injectors?

Would that be correct?

Hey, thanks a lot.

I am using the original Polo 1.6 injectors, I think they are 170cc or something. I fitted a VeloCiti dash and complete harness, so the TCI unit was not used anymore. I am not clued up on injector specs, but I would say 320cc are going to be over-kill.

[Mojo]

Wow that thread is moving dude ..

awesome work

[frog_in_the_fridge]

I see many tips here to be picked up

[sixteen10]

I see many tips here to be picked up

indeed!

Mac Man is the inspiration behind my 2.0i 8v shortblock mk1 that i own today!!

[frog_in_the_fridge]

I havnt read the whole thread yet....lil bit each day...but im thinking of reboring to 1.8 8v with my block.

[Scooby GP]

[quote="MacMan"]

The cooler mounted in its place with the radiator fitted.




quote]

hey big mac,i gave moe 276 a small tip on his s3 golf about cooling.i actually did the job for him.we've been friends for quite a while now.anyway,those rubber flaps on your radiator must be removed.it dropped his temp by more than 10 degrees.some say it causes a swirl of wind and shouldnt be removed.i say otherwise.i had alot of mk1's,including very fast ones.they all hated those flaps.that guards are for snowy german weather.

[frog_in_the_fridge]

small lil Q.....

I see lotsa ppl using caravelle 2.3 pistons. Are they the same bore size as 2.0 pistons? Just the stroke thats different?

And why do ppl use them instead?

[MacMan]

small lil Q.....

I see lotsa ppl using caravelle 2.3 pistons. Are they the same bore size as 2.0 pistons? Just the stroke thats different?

And why do ppl use them instead?

Kombi 2.3 pistons are used when doing a 1900 conversion (83.5mm (40thou oversize) Kombi 2.3 pistons and an 1800 crank) because the deck height is higher than that of the Kombi 2.6 piston, which means the block doesn't have to be decked to get the compression ratio right.

[MacMan]

hey big mac,i gave moe 276 a small tip on his s3 golf about cooling.i actually did the job for him.we've been friends for quite a while now.anyway,those rubber flaps on your radiator must be removed.it dropped his temp by more than 10 degrees.some say it causes a swirl of wind and shouldnt be removed.i say otherwise.i had alot of mk1's,including very fast ones.they all hated those flaps.that guards are for snowy german weather.

Thanks man. Luckily cooling has never been a problem on my car. The water temp never goes above 100C no matter how hard I drive it. Maybe it just isn't making enough power.

[frog_in_the_fridge]

small lil Q.....

I see lotsa ppl using caravelle 2.3 pistons. Are they the same bore size as 2.0 pistons? Just the stroke thats different?

And why do ppl use them instead?

Kombi 2.3 pistons are used when doing a 1900 conversion (83.5mm (40thou oversize) Kombi 2.3 pistons and an 1800 crank) because the deck height is higher than that of the Kombi 2.6 piston, which means the block doesn't have to be decked to get the compression ratio right.

Ah i see now

[Slayer1zn]

Hey bro, awesome thread just sat and read the whole thing. Just fot interest sake, my 1.3 cross flow(not an error its a european polo motor) Is runing twin 40DCOE's or sidies, and the car went from running 67.9 bhp to just under 100bhp. So for some ingnorant idiot to say they are standerd is beyond stupid. Here in the UK alot of guys are building old school engines like me using carbs, just because it matchs the theme of the car. The reason they use webers is because they offer more power than std fuel injection when tuned up. THEY ARE BUILT FOR PERFORMANCE!!!!

I am considering now building 2.0 8V after reading this, and I wish I was back in SA! See the pics below of my engine.

before the carbs:



After, sorry this was before it was finished I need to get a new pic.



I just think some people can't control their jelousy.

[frog_in_the_fridge]

Hey bro, awesome thread just sat and read the whole thing. Just fot interest sake, my 1.3 cross flow(not an error its a european polo motor) Is runing twin 40DCOE's or sidies, and the car went from running 67.9 bhp to just under 100bhp. So for some ingnorant idiot to say they are standerd is beyond stupid. Here in the UK alot of guys are building old school engines like me using carbs, just because it matchs the theme of the car. The reason they use webers is because they offer more power than std fuel injection when tuned up. THEY ARE BUILT FOR PERFORMANCE!!!!

I am considering now building 2.0 8V after reading this, and I wish I was back in SA! See the pics below of my engine.

before the carbs:



After, sorry this was before it was finished I need to get a new pic.



I just think some people can't control their jelousy.

I think vw should have converted to crossflow in S.A a long time ago. Would have been such an improvement.

[1.6carbster]

I see many tips here to be picked up

indeed!

Mac Man is the inspiration behind my 2.0i 8v shortblock mk1 that i own today!!

And he is the builder that helped me make my 1800 what it is today!

He's the man!

[Slayer1zn]

Hey bro, awesome thread just sat and read the whole thing. Just fot interest sake, my 1.3 cross flow(not an error its a european polo motor) Is runing twin 40DCOE's or sidies, and the car went from running 67.9 bhp to just under 100bhp. So for some ingnorant idiot to say they are standerd is beyond stupid. Here in the UK alot of guys are building old school engines like me using carbs, just because it matchs the theme of the car. The reason they use webers is because they offer more power than std fuel injection when tuned up. THEY ARE BUILT FOR PERFORMANCE!!!!

I am considering now building 2.0 8V after reading this, and I wish I was back in SA! See the pics below of my engine.

before the carbs:



After, sorry this was before it was finished I need to get a new pic.



I just think some people can't control their jelousy.

I think vw should have converted to crossflow in S.A a long time ago. Would have been such an improvement.

[KevinLab]

Hi Macman,
This is a awsome post. I have a 2000 Polo 16i that is very tired. I have been thinking of doing the 2.0i
upgrade, so from reading your specs all I need is a 2.0i crank stock rods an 2.6 Kombi Pistons and then have the
ECU remaped. Is the Head standard?
I don't want to do any big mods like cams an the rest because it is a daily driver.
Oh it does have branches and a realiy k@k Power Flow exhaust.

[mojo786]

ahoy! this is a frikn fantastic thread...love the detail.
i also went the 2.0lt way but still running the stock 1.4 injectors
with mp9 system,is this ok or should i go bigger on the injector size and what size should i go?
i have been told to get bigger ones but the guy that did my conversion rekon it will work fine with the 1.4 injectors.

[frog_in_the_fridge]

ahoy! this is a frikn fantastic thread...love the detail.
i also went the 2.0lt way but still running the stock 1.4 injectors
with mp9 system,is this ok or should i go bigger on the injector size and what size should i go?
i have been told to get bigger ones but the guy that did my conversion rekon it will work fine with the 1.4 injectors.

I spoke to a Bosch FI specialist a while ago...and he reckons that u can with smaller injectors on a bigger displacement engine....within reason of course. All u go is buy a decent Ajustable Fuel Pressure regulator....do some sums for the right pressure setting and Bobs ur redneck aunty.

Ur pushing more volume thru the injector pulse timing.... Thus achieving the more or less correct CC....but also more likely than not Damaging the injector. Dont quote me on this though...just relaying info.

[mojo786]

shot a lot frog_in_the_fridge...