FizzyRascel
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Registered: 27th Jan 05
Location: Surrey
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bought the LET engine i saw last week, its totally standard and i want to know what are the best ways to gain more power.
can the turbo be replaced with another? what other bits should be done?
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SetH
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Registered: 15th Jul 01
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forged pistons would be a good start.
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Ditch
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Registered: 29th Nov 02
Location: St Albans Drives: JDM Celica GT4 WRC
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smart engine, how much you pay?
get much history with it? Seen it run etc.?
The turbo can be replaced, but as I understand it the standard item will run more boost anyway, and with correct mods it will be reliable too.
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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You can replace it with any turbo you want.
Just change the manifold and exhaust housing to match, then get it mapped in. So you will be looking at some more management then too. And probably some more injectors.
If I was going for a turbo it would be a GT28.
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Nismo
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Registered: 12th Sep 02
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get a TO4 you will fly then 
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FizzyRascel
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Registered: 27th Jan 05
Location: Surrey
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the engine is from a N-reg Calibra with rear end damage and only has 29,500 miles on it, got a bargin as i have a friend that works in scrappy in essex
got the whole car for £500, so a bargin, need to move complete car from scrappy though
where can i look at these turbo's, who supplys em?
not gonna bother doing any exterior work anymore, just got to choose some rims.
attempting to remove engines from both cars over weekend and check the corsa shell for any bad areas, should it be stitch welded
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Adam_B
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Registered: 13th Dec 00
Location: Lancashire
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£500 
29k
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FizzyRascel
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Registered: 27th Jan 05
Location: Surrey
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but i need to move the whole thing as part of the deal, he wants it gone over the weekend.
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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T51kai 
[Edited on 04-02-2005 by Adam Kindness]
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bradfincham
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Registered: 20th Sep 02
Location: East Of England Drives: Clio 172
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still a good deal,
just stick some arp rod bolts.
FMIC and eds/wallace performance chip,
1,2,3,4 your choice but id go for 1 or 2 to start with as can keep same engine internals and turbo.
v tuning is the place to go for this.
also have a look for a hybrid kkk turbo on ebay as will help if you want phase 3,3.5
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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and you'll have zero lag  my chuff!!!
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Stu
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Registered: 3rd May 00
Location: Madchester UK Drives: 2014 BMW M135i
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Get it breathing correctly first.
1) Full exhaust (turbo back)
2) Larger intercooler
3) Possibly induction kit if you can stop heatsoak.
The above should release another 1-2psi boost. That should net you at least 20bhp and are a good ground for further mods.
Dont just increase boost straight off, not sure what standard boost is on one of them but the standard tubby should be good for another 5 psi! Bear in mind that if the car is set up correctly 1 PSI can create 10-11 bhp.
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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Top purchase
agree with all the comments made so far..
a GOOD, and i stress good, standard kkk16 turbo can supply enough boost to take the lump to 350bhp (with other mods obviously).
other options are the various hybrids out there for example regals 'race spec' which i think is basically a kkk26. or you can replace it with anything you want, but youd need a new manifold and custom map.
a fron mounted intercooler is a must on a corsa conversion but dont bother with teh regal/eds item, its not worth the money, get a universal forge one.
dont be so hasty to scrap the standard turbo
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Teddy
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Registered: 19th Jul 04
Location: Northampton Drives: VW Bora 1.9TDi pd130
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If your on the look out for a "better" turbo you have a couple of Choices.
The main difference between the Vauxhall Turbo engines and say the Cosworth is this....
The Cosworth's Turbo sits on the SIDE of the manifold so a bigger turbo is used.
The Vauxhall C20LET Turbo is housed inside the manifold - the disadvantage (if it is) is the fact the Turbo is alot smaller.......BUT because its housed in the manifold the exhuast gases drive it very quickly as they are closer. Hence less lag - the stock turbo runs out of puff at around 5.500 rpm but the major advantage is that you come on boost (known as spooling) very very quickly and at low revs.
If you have been in a BIG power Cossie you will notice nothing happens below 3k then bang all hell brakes loose.
With the Vauxhall it spools up really low down - this is particulary good for driveability.
anyhow your options to changing the turbo are as follows.
The major tuners such as Wallace and V-Tuning (my favourites lol) offer "hybrids" of these turbo's Bigger thurst bearings, bigger oil seals means you can run more boost for harder and longer BUT it comes at a price.
The KKK26 Turbo is nearly £1700 but is simply awesome, the best middle of the road is the S144 which is reconmended for the phase 3+ kits.
The other alternative is to convert the manifold to the Cosworth operation. Courtenay sell a direct replacement manifold which means you can bolt on any garrett you like........ But you will need management and so on - and could prove as expensive.
A Corsa Turbo is very quick in standard Trim. The engines are so so tuneable but you will seriously have to consider how to get the power down. Whats the point in spending lots of money running silly boost to only have it spin up in every gear?
Might look good but your not making the most of it.
I hope this little essay helps anyhow!
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Teddy
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Registered: 19th Jul 04
Location: Northampton Drives: VW Bora 1.9TDi pd130
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quote:
Originally posted by Stu
Dont just increase boost straight off, not sure what standard boost is on one of them but the standard tubby should be good for another 5 psi! Bear in mind that if the car is set up correctly 1 PSI can create 10-11 bhp.
You cant just increase the pressure anyway - the Management and the amal value will shut it off and bring up an engine management fault as....
"Boost out of range"
Its the engines fail safe.
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Teddy
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Registered: 19th Jul 04
Location: Northampton Drives: VW Bora 1.9TDi pd130
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quote:
Originally posted by Mattb
a GOOD, and i stress good, standard kkk16 turbo can supply enough boost to take the lump to 350bhp (with other mods obviously).
other options are the various hybrids out there for example regals 'race spec' which i think is basically a kkk26. or you can replace it with anything you want, but youd need a new manifold and custom map.
350bhp on a KKK16 - not likely. It might just about handle 300bhp but it will never spin up as quick to make the most of the power - the turbo wont take that for long.
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timrud_
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Registered: 3rd Jul 04
Location: Sheffield
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Teddy, its an urban myth they spin up in any gear with some decent power!
Nice dry day, bit of good driving and traction is not a real issue.....
If your building a car properly for mega silly power, you should not cut corners, so a new manifold/management should be part of the plan!
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Teddy
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Registered: 19th Jul 04
Location: Northampton Drives: VW Bora 1.9TDi pd130
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quote:
Originally posted by timrud_
Teddy, its an urban myth they spin up in any gear with some decent power!
Your experience may have been different to mine - but a phase one Corsa Turbo i drove was horrific. Span in the first 3 gears without even trying.
If your trying to put down over 250bhp though the front wheels im sorry its not an urban myth - its the laws of mother earth.
With a decent tranmission set up you can approch the problem but it will still be a git running "BIG" power.
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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are there after market diff's (plate or ATB) avail for F28's?
Or just get a fuckoff quaife box made up, straight cut/sequential (6k or so later )
quite fancy building a c20let stripped out bucket
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bradfincham
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Registered: 20th Sep 02
Location: East Of England Drives: Clio 172
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you will without a doubt need a LSD, but a good driver with lots of experience can get the power down.
Id say stick with phase 2, forge intercooler, and some arp rods and different injectors.
This is the way i will be going when i get the LET sorted.
V tuning as mentioned will be able to supply fit and help anythign you need, henrik and dave's knowledge is 2nd to none
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3CorsaMeal
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Registered: 11th Apr 02
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What scrap yard is this you speak of?
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Teddy
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Registered: 19th Jul 04
Location: Northampton Drives: VW Bora 1.9TDi pd130
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I was running the VMAX phase 2 job and even with that i was thankful for 4wd because running 18psi you could physically feel the car stuggling to put it down but it did grip.
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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One like that should be big enough 
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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this was a decent topic 
I wish i was an admin and could edit this thread
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Paul_J
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Registered: 6th Jun 02
Location: London
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If I was an admin kushti would be banned. As I don't know what he's ever actually brought to this site of any value.
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