what size of turbo for a 1.3?

[lewist123]

Hi

i am in the process of turboing a 1.3 engine i have.

as standard it has 56bhp and i am looking for around the 150 bhp mark. I estimate i will need around 20 psi to achieve this!?

No. 1 - does this sound about right

No. 2 - What sort of sized turbo will i be looking at? i need some reasonable boost, but i don't want a laggy beast!

is it worth while sticking a lumpy cam in there or shall i see what happens with the standard cam?

The plan is to convert to a full MPI setup with management and some resonable sized injctors (i.e. standard injectors from say a 2lt motor!) and a decent intercooler!

[phunky monkey]

r5gtt turbo should work!!

[cambridge]

standard cam, OR a special grind to dial out most of the valve overlap.

[Jack]

See if you can wang a turbo off a 1.5 - 2.0 diesel car. Should be about the right size for what you want.

[cambridge]

not good to use a diesel turbo.... they cant generally cope with petrol exhaust temps

[lewist123]

i wondered about a derv turbo... is that definately right mate that generally they can't cope?

there are a few standard cams available for this engine, it has been around for donkies and ranges from 40 bhp to 75 bhp. some of that is compression ratio and some of it is cam.

a regrind may be the way though!

the current compression ration of the engine is about 8.5, which i am hoping should be low enough!

[lewist123]

there is also a stroking kit to take it 1.4. would that be worth while? or shall i just boost it suit?

there is also a girdle available... is that worth it as well?

[danielparrish]

i wood go with the renaunt 5 gt turbo one the r5 are carb so may you mite be able to use some of the running gear

[chip]

Hi

i am in the process of turboing a 1.3 engine i have.

as standard it has 56bhp and i am looking for around the 150 bhp mark. I estimate i will need around 20 psi to achieve this!?

No. 1 - does this sound about right

No. 2 - What sort of sized turbo will i be looking at? i need some reasonable boost, but i don't want a laggy beast!

is it worth while sticking a lumpy cam in there or shall i see what happens with the standard cam?

The plan is to convert to a full MPI setup with management and some resonable sized injctors (i.e. standard injectors from say a 2lt motor!) and a decent intercooler!

You want 120bhp per litre from a 8v engine, but dont want it laggy?

Hope you have VERY deep pockets then mate!


Whats your budget for this conversion?

You can do it "ok" for a grand all in im sure, or you can do it very well, driving nicely and making cracking power all the way up for probably £5-8K or so.


What engine are you referring to though before we make too many sweeping statements that might not apply?

[paddy138]

what about a starlet turbo, would they be any good, if your looking 150bhp on a small budget its not going to work, you would probaly want to upgrade the conrods and pistons if you want that power and you would want to be doing a lot of head work to increase the flow, could be pricey enough

[Rs1]

not good to use a diesel turbo.... they cant generally cope with petrol exhaust temps

Its about time they sorted this though, we need some VNT's that can ahck petrol engine exhaust gas temps
Havn't porsche got something on the market...i think i may have read it somewhere?

[Jack]

What engine are you referring to though before we make too many sweeping statements that might not apply?

The Skoda 1.3 8v engine I'm guessing.

Is it the one with both manifolds on the same side? That would make for some awesome pipework if you didn't want an I/C. lmao

[lewist123]

chip - i was hopeing to spend about a grand yeah! i am going to try and source a lot of these parts second hand or cheep.

for instance i have a spare thottle body from an 20ne mpi. so that should work nicely mated to a custom plenum with trumpets (my dad works in ali so should be able to sort me out something nice! as well as being able to get pipe!)

hoping for a second hand turbo (seen a few from r5's and a couple of GT2 and GT25 (although to be honest i don't exactly know what they mean! :/ ) a second hand intercooler or possibly charge cooler (its a rear engined car!) and second hand management of a suitable type!

the engine in question is a 1.3 skoda favorit engine and its going in the back of a skoda estelle! its a sound engine and does good work in rally cars with lairy cams (120+ bhp na).

the only down side is that it is pre-crossflow! so heat soak may be an issue, bt i think with a shiney heat sheild and lots of exhaust rap and big inter/charge cooler it should be ok!

[lewist123]

what about a starlet turbo, would they be any good, if your looking 150bhp on a small budget its not going to work, you would probaly want to upgrade the conrods and pistons if you want that power and you would want to be doing a lot of head work to increase the flow, could be pricey enough

could work, i was hoping to get something suitable second hand so whatever works and is available!

the rods are ok in the rally engines (they change the pistons to help up compression) and i am assured that the oil and water are fine as standard (although oil may be an issue once it has to un though a turbo and an oil cooler!!)

the head is actually pritty good as standard, but it will get some work

[Rs1]

On that sort of budget steer clear of GT turbo's, go with the old trusty T series...like phunkey monkey said something of a R5 would be ideal.
Management wise....again on that budget megasquirt is probably the only option, you may be able to squeeze to go-tech.
Intercooler would be so much cheaper than a chargecooler, you can pick em up of ebay for next to nowet these days, even a **** one will do you fine...getting airflow to it may be a **** though.
Personally depding on the OE inlet i'd forget the custom plenum with trumpets as the time/money can probably be better spent elsewhere.
Being pre xflow should be a problem, the rattle old r5gtt's manage ok enough but heatshield would be a good idea.

[lewist123]

The intercooler would be much cheaper, but as you say the airflow to it is not going to be a lot! it could be fitted with a fan which may help a little!

charge cooler would make the install cleaner, the only place i can think to put the intercooler is under a grill in the boot lid, but then it is right over the engine and access will be a bugger!

as for the custom inlet, the standard skoda one is less than ideal, and my dad should be able to sort me out on that front cheep enough!

[andy_gte]

i'd go with a ct26 off a starlet turbo they can flow some good figures. a lad I know has a starlet which is 130bhp

[jimspeed007]

lol... ok mate what about finding someone who does decent big end bearings first.dont forget only 3 bearing crank too...
did see one ages ago tho using metro turbo carb and turbo but that only managed 100bhp (and only for about 200 miles lol)
rods are fine but i would think piston cooling would be youe enemy specially with 20psi.
plenty of oil takeoff places in the block and plenty of flow too so should be no probs there..
make sure you get the correct 136 rapid water pump or dont bother
hope its some use mate

[chip]

Renault 5 turbo gets my vote.

What management are you going for? MS?

[Allan_100]

Ive have 3 reno 5 turbs in my driving life and they were all great fun. The parts are also cheap as chips. Wouldnt it be easier to just buy an r5 engine with all running gear and stick that in? At least you know youve got a proper turbo engine that will easily give you 150BHP with a bit of turbo tweaking, jetting and an alloy intercooler. They are so simple to work with

[lewist123]

well that is an option.

the main reason i wanted to retain the skoda engine is firstly becuase its different, and secondly becuase it is light as a feather, which is important with a rear engined car! plus i would need to find a suitable replacement transaxle!

jim - yeah i have seen a photo of the crank and it is a wierd one, but i think the 1.4 crank and rods out of the later fabia motor are better but then i am not sure if the block is different though - any gen?

if there is plenty of oil flow i could look at under piston oil jets to help with keeping them cool!!

is the favorit water pump better, remember this is a favorit block!

chip - as for management, i have not decided yet tbh.

[cambridge]

Its about time they sorted this though, we need some VNT's that can ahck petrol engine exhaust gas temps
Havn't porsche got something on the market...i think i may have read it somewhere?

Porsche have, but oh fcuk me is expensive! and will need replacing with relative frequency.

I dont think there is so much market in the OEM terms for them to justify devlopeing a VNT setup that is reliable for Petrol engines. Everyone loves diesels, thats where the development money is

have to say, the OEM modded focus ST ive had a play in didnt feel laggy at all, but did kinda run out of puff a bit at 5K lol never mind 400NM on tap was nice

[lewist123]

What is VNT?? variable turbine blades?

I did a quick google for favorit turbo and lo and behold turned up a czech forum with a guy who has done it!!

not tried translating it but by the looks of it he has 130 bhp,

people are also talking about the crank, and it seams that it has held up fine!

http://images.google.com/imgres?imgurl=http://home19.inet.tele.dk/simlen/gfx/tuning/turbo/turb2.jpg&imgrefurl=http://zlosnik.pl/showflat.php%3FCat%3D%26Number%3D425875%26Main%3D415297&h=250&w=320&sz=27&hl=en&start=12&u m=1&tbnid=NNwXajfGoWi0GM:&tbnh=92&tbnw=118&prev=/images%3Fq%3Dskoda%2Bfavorit%2Bengine%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3Dcom.microsof t:en-us:IE-SearchBox%26rlz%3D1I7GGLR%26sa%3DN

edit - tried translating it, and it comes out a load of jibberish!

[tommychimp]

doesn't the GM 2.2 diesel have the variable turbine blades?

The one that goes in the 2.2 Vectra sri diesels?

[Rs1]

doesn't the GM 2.2 diesel have the variable turbine blades?

The one that goes in the 2.2 Vectra sri diesels?

Probably, you'll be hard pushed to find a diesel nowadays that doesn't have one.
They'll die very quickly if they see petrol engine egt's though