Hey guys

just thort id show a couple pics of my lil project down in NZ, have a 87' 120L which i have fitted a favorit 1.3 engine too and now have started to EFI and Turbo it, have built the inlet manifold myself and have a megasquirt ecu all made up ready to go, has a IHI turbo from a subaru fitted to the origonal exhaust manifold with an adapter plate welded to it.

Is a slow project but hopefully be on the road this year!

:cool:I love nutters like you! Keep up the crazy, but quite excellent work!

Hiya.

Are you fitting an intercooler, and if so what sort? I'd suggest air/water, and feed the water through the standard radiator. In fact, having suggested that, I'd also suggest replacing the standard mechanical water pump with an external electric one!

would nitriding the diff crown wheel + other pinions strengthen it to high boost turbo levels

i reckon the sk 120 L is the bad boy of the range with its most exellent lift off oversteer characteristics

the felicia sump can cause oil starvation if practising the aforementioned lift off or just cornering hard to the left:eek: ...........unless you already have baffled inside it

it sounds like a most excellent project:D

I am fitting an intercooler, just a small air to air one with an electric fan actuated by the megasquirt under the right conditions, i am running the standard favorit steel sump at the moment, may change it to the 120 alloy sump and fabricate my own oil pickup later, as with boost i plan to run about 8-10psi and will see what happens with various mechanical components haha, i have put a 120 5 speed thru alot.....360,000km, pulled out tree stumps, towed things i shouldnt have towed and doing donuts and it managed to hack it

I wsa thinking that air-air in the engine bay runs the risk of being an inter-heater, even with a fan unit.

Front-mounted air-air will cause turbo lag as you compress the air in the pipework, which is how I arrived at air-water, with a front-mounted radiator.

Im going the same route after Xmas. Except its in a favorit. You are using a 135 engine i presume?

its supprising what the gboxes can handle (i dont advocate abusing them.............all the time) i reckon 10 psi might be the upper limit before the diff or the input shaft breaks:confused:

the mainshaft and layshaft plus assorted nik naks look well up to the job

is the car going to be a sinister sleeper machine:cool:

I wsa thinking that air-air in the engine bay runs the risk of being an inter-heater, even with a fan unit.

Front-mounted air-air will cause turbo lag as you compress the air in the pipework, which is how I arrived at air-water, with a front-mounted radiator.

Its possible to front mount the intercooler at the front and not suffer.....there was a car featured in Practical Performance cars recently(forgive me I cant recall the details at all, but it was very nice piece of kit) that had a turbo mounted at the exhaust outlet pipe at the back of the car and then had hose running back to the front of the car to the engine with no problems....I think the secret was having a small turbo that span up quickly...and a small turbo is all you'd need in a Skoda.

Its possible to front mount the intercooler at the front and not suffer.....there was a car featured in Practical Performance cars recently(forgive me I cant recall the details at all, but it was very nice piece of kit) that had a turbo mounted at the exhaust outlet pipe at the back of the car and then had hose running back to the front of the car to the engine with no problems....I think the secret was having a small turbo that span up quickly...and a small turbo is all you'd need in a Skoda.

Neither can I, but I suspect it was a Mazda MX-5 or Miata. I know someone who did that with their's more or less as a joke, but crucially, they were running light pressure and retained the standard CR.

Nope....it was a very competetive hillclimb car putting out big power and it was something like a Pug 205 MI16 (could even have been) where there wasnt room for the a decent intercooler at the front of the car, so they put the turbo in the back to get it cooler exhaust gases so the intercooler wasnt necessary. I will search t'internet and find it!

The acrticle wont be on line as PPC doesnt post stuff up...but Ive found a link to the Pug 106 froum that confirms my original thoughts!

Rear mount turbo chargers. - 106 Rallye Register Forum

Obviously that doesnt help with a front mounted intercooler....personally if I was going down this route I agree that a chargecooler would be the way forward with a rad for it in the front.....in fact I ran exactly that system on my Renault Alpine GTA turbo a few years back.....it won me lots of sprints/hillclimbs and the chargecooler proved very effective.

YouTube - Alpines at Knockhill 6 May 2006

I miss that car sometimes :weeping:

Ok. I do know people who've fitted bigger air-air intercoolers and/or longer pipework, and given themselves lag on road cars as a result (It wasn't cos of bigger turbos that they didn't fit at the same time). If I'm given the choice of "big power" or "better drivability", I'll take drivability every time. Case in point, coming into work today I was tending to run up the back of someone in front, despite holding 5th down to 30ish (TDi110).

i have seen this article on the pug gti :the idea is that by using thin exhaust pipe to the turbo (and small low friction turbo) the gas speed is always high and that the gas responds remotely to a changes in gas speed because the gas has higher pressure (balls in a tube scenario; push on in one comes out straight away) and that the pipe running under the car is also thin to to give the same affect (and all the cooling effects etc)

but on a skoda the boost pipe would be 8-9 metres long plus the capacity of the intercooler would give excellent unpredictability of when it will boost up next

could the intercooler be mounted down next to the bellhousing on the right side with a bracket to the bulkhead ,then it would be up stream of engine heat and would pick up cold air that would curl around the fuel tank

could mount the intercooler horizontally and very low, my old S14 had a diff oil cooler, could fit a small intercooler in a similar place I think..

i want to have minimal inlet piping to keep lag down, have had the car running with a blow thru SU setup and no intercooler and the inlet pipe stayed pretty cool (iced up when first started) at the moment plans are to mount the intercooler laying flat on the lh side just below the vents to the boot lid and have a heat shield to keep heat from engine away and draw cold air from under the car , engine is a 135 i think (from a 90ish favorit) over here in nz all we had were the 120L's and then the favorit, a couple of felicia's made it in before they stopped importing them untill skoda released the octavia and then fabia, so im classed as a rather sick individual here, with a 120 (+a spares car) an octavia 1.8T and an alfa romeo alfetta sedan, nice having something different from everyone else

At the end of the day, I accept it's your project; I'm basically brainstorming extra ideas that have some merit at you.

It would be cool to hang a big dirty intercooler at the front! must say that would turn some heads! haha

I would have to say Turbo Estelles/Rapids are not a new idea. Ive seen 2 now and both of them ended up looking very similar after years of seperate research. One guy even tuned classic engines for a living and made a Rapid turbo after 2 years of trial and error. I would certainly look at those to see how they were constructed before wasting valuable time/money on other bits.

The Rapid turbo had a Mercedes Benz Sprinter Van turbo grafted onto the exhaust with an intercooler spanning the whole rear lid. This wasnt ideal, but produced 165bhp on a dyno on a 135 engine and was the very limit of what the gearbox could take. There really wasnt any point in going any higher as the gearbox was failing quickly quickly as it was. Ive seen this car advertised fairly recently for £500 and was very tempted. Having been in it i would say its the fastest rwd skud ive been in. My head was pressed into the headrest

I would have to say Turbo Estelles/Rapids are not a new idea. Ive seen 2 now and both of them ended up looking very similar after years of seperate research. One guy even tuned classic engines for a living and made a Rapid turbo after 2 years of trial and error. I would certainly look at those to see how they were constructed before wasting valuable time/money on other bits.

The Rapid turbo had a Mercedes Benz Sprinter Van turbo grafted onto the exhaust with an intercooler spanning the whole rear lid. This wasnt ideal, but produced 165bhp on a dyno on a 135 engine and was the very limit of what the gearbox could take. There really wasnt any point in going any higher as the gearbox was failing quickly quickly as it was. Ive seen this car advertised fairly recently for £500 and was very tempted. Having been in it i would say its the fastest rwd skud ive been in. My head was pressed into the headrest

Blimey!!!! I'd not heard about that one.

As we all know, there's nothing faster in daily driving than a Sprinter van!

You'd obviously have to paint the car white though to get the full effect.

Didn't someone in CZ put a 1.8 Turbo engine from Octy VRS in a Rapid or Estelle?

Keep up the good work though (OP in NZ), fascinating project!!

what bits of the box were failing under such a mad power level?

blimey 128 bhp per litre that really is an achievement :eek:

bet the rear engine mount rubbers are iffy