C20LET Corsa GSI

donvaux · 07-07-2007, 11:19

hiya guys and gals i've just started getting a load of bits together to convert my c20xe corsa to a c20let corsa i know this convertion has been covered loads of times but i thought well i didn't do a project thread when i converted my corsa to a c20xe because of the big rush i was in i thought i have to do one this time heres a few pics of my parts so far

pics were taken on my mobile sorry ain't the best

and here's what all this will be going in

donvaux · 07-07-2007, 11:23

today i've been cleaning the gearbox heres how it looked

and now

donvaux · 07-07-2007, 13:41

i should soon be receiving steel rods off rallyman and then the block will be sent to my local engine builders. what sort of power are the standard pistons able to take does anyone know just that i'm looking at making a very solid engine that will run around 300bhp maybe a bit more cheers

djivesp · 07-07-2007, 15:16

keep 'em coming buddy

i'll be doing this myself at some point, it will be handy for many people

i've heard 350 mark for pistons/rods is the limit in the Let. I think its probably more down to how dialled your ignition timing and fuelling is, if it's knocking like hell as it is, then it wont see anywhere near 350 before the pistons fall apart.
What are you going to use for management ?? Let ECU or programmable ??

to make reliable power, check all the clearances (piston to bore, crank end float, etc) - they're in haynes i think, renew shells and make sure you have good oil pressure and a good cooler if you're planning to give it pain.

lee866 · 07-07-2007, 15:27

std piston's can take 500bhp but have to be in good condition not tired worn one's.

Adam · 07-07-2007, 15:56

standard pistons can take 400bhp

as for rods its better to be safe and use uprated ones i.e. scoobys ones especially for the price u can get em at the mo

donvaux · 07-07-2007, 16:05

Quote:

Originally Posted by djivesp

keep 'em coming buddy

i'll be doing this myself at some point, it will be handy for many people

i've heard 350 mark for pistons/rods is the limit in the Let. I think its probably more down to how dialled your ignition timing and fuelling is, if it's knocking like hell as it is, then it wont see anywhere near 350 before the pistons fall apart.
What are you going to use for management ?? Let ECU or programmable ??

to make reliable power, check all the clearances (piston to bore, crank end float, etc) - they're in haynes i think, renew shells and make sure you have good oil pressure and a good cooler if you're planning to give it pain.

i'll be using standard management to start with i might progress to standalone but dunno yet

moua · 07-07-2007, 16:24

Quote:

Originally Posted by donvaux

i'll be using standard management to start with i might progress to standalone but dunno yet

On of my friends is running a 20LET Corsa with standard rods/pistons with a T4 turbo. 400Hp @ 1.8bar and 12.1 @200km/h 1/4mile on semi slicks. I you get the fuel/timing wrong at this power level, you will loose the motor in a few secs. I would have a good look at the managements system options before proceeding.

djivesp · 07-07-2007, 16:59

sheeet, 1.8 bar !! low compression pistons i'd assume ?!

If youre gonna use standard management with a rising rate FPR then a wideband is essential so you can always monitor the mixture and make sure it's not going lean. Also i'd suggest looking into det-cans - i've seen some funky diy set-ups, the knock sensor is a mic so you could theoretically hook it up to your stereo and listen for knock, but i think motronic would probably sort itself out ??
chip is the man i think he's turboed a c20xe.

Im tempted to go water injection and standard compression - honda style

they push out massive bhp with piddy engines !!

moua · 07-07-2007, 20:47

Quote:

Originally Posted by djivesp

sheeet, 1.8 bar !! low compression pistons i'd assume ?!

If youre gonna use standard management with a rising rate FPR then a wideband is essential so you can always monitor the mixture and make sure it's not going lean. Also i'd suggest looking into det-cans - i've seen some funky diy set-ups, the knock sensor is a mic so you could theoretically hook it up to your stereo and listen for knock, but i think motronic would probably sort itself out ??
chip is the man i think he's turboed a c20xe.

Im tempted to go water injection and standard compression - honda style

they push out massive bhp with piddy engines !!

Yes/No Mahle with the tops machined. Run 102.6 leaded racing fuel mixed with tolune and Water/Methanol water injection 51/49 mix. (not aquamist) Boosted 2.2 bar on the dyno. Strangely the car is his wife's everyday drive !!! He is busy building his drag car.

I would recommend the use of a wideband. If you intend using it on the road, you will need fine tuning as the dyno is not always that representive of road conditions.

The motronic knock sensing will not work properly if you change cams and it is only used up to a certain RPM (If I remember correctly 5500 RPM) Knock sensors is sensitive for certain frequency band but the when is important and that get changed with different cams.

If you are going to use water injection as a way to achieve high boost,...remember it becomes a single point of failure.(Make sure the pump....pumps at the right pressure and the water bottle is full etc etc.

***Andy_L*** · 07-07-2007, 22:35

Quote:

Originally Posted by donvaux

Any how many half naked chaps can you get in the back of a Corsa gen??

Gonna be a monster when done!

donvaux · 08-07-2007, 15:00

Quote:

Originally Posted by Andy_L

Any how many half naked chaps can you get in the back of a Corsa gen??

Gonna be a monster when done!

lol

*Jen* · 09-07-2007, 07:37

its gonna be a beast

keep us updated. if i had spare money, i wouldnt mind making a sleeper corsa let.

slash · 11-07-2007, 06:39

check out cjgwillz on ebay he's got ecu for sale which may be of use to you.(slash snr)

donvaux · 11-07-2007, 14:50

already got a phase 2 chipped ecu bud but thanks for looking

corsakid · 11-07-2007, 15:00

thats my mates old engine and my old box!

good luck with getting it all fitted

is that wills old charge cooler as well?

donvaux · 11-07-2007, 15:06

yep it is lol you got the red corsa ain't you?

corsakid · 11-07-2007, 15:10

yes mate i added you to msn jus now

donvaux · 11-07-2007, 15:22

ok mate so hows the corsa

corsakid · 11-07-2007, 15:41

corsa is good, jus getting a few go faster bits, a new head, verniers, a few other bits hopefully see it over 300bhp next weekend

donvaux · 11-07-2007, 16:31

donvaux · 17-07-2007, 16:41

little update some presents have arrived

recon turbo

steel rods off rallyman cheers chris

when i get paid i'll be building up the bottom end hopefully

Adam · 17-07-2007, 16:50

dont forget to give autovaux a tinkle for a set of cav 1.7td oil squirters

only £4.79 each plus the ole vat...u'll have under piston cooling then

donvaux · 17-07-2007, 16:53

i was thinking of that i'll ask the bloke who done slashs engine to see if he can do it i don't feel confident to do them

Adam · 17-07-2007, 16:54

piece of pshh to do...well my mechanic said so lol sozzz he's doing mine

u seen the step by step on vaux forum aye?..chips account.