172/182 turbo [Archive]

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TJ Dizzy

23-09-2011, 22:30

jock

24-09-2011, 00:15

It says they have 2 guys ex BBPT working with them, but is 11:1 not a bit high for a turbo? May be typo.

Wobba

26-09-2011, 14:05

I think 11.0:1 is the standard F4R compression ratio. F7R is 10.0:1

Lower would be better for a turbo build, as you can run more boost safely.

Daz.

26-09-2011, 14:19

I've seen people with this conversion and have had no issues..

I've been tempted myself for the future...

tutuur

27-09-2011, 11:08

It's very common in the Honda world to boost on standard CR.
They retard the ignition to prevent knock...

chip

27-09-2011, 11:44

It's very common in the Honda world to boost on standard CR.
They retard the ignition to prevent knock...

Honda engines have a mega efficient design of combustion chamber and piston crown that makes them particuarly det resistant, so they can run a lot of ignition advance in the first place, so you can retard quite a bit of ignition and still have plenty.
If you try the same on a less well designed head like a F7R one for exmaple (im not as familiar with the F4R so not sure where between the two they sit) then you will run into problems as you'll end up with so little ignition timing that the engine will be generating a lot more heat so you are far more likely to melt a piston, as you would end up running ignition near or even after TDC.

Standard 1800cc honda vtec engine is quite happy turbo'd to 400bhp on standard compression, but for example you'd be lucky to reliabley see 250 out of a f7p on standard internals I suspect.

You cant just assume that because something works on one engine it will work on all engines, they all have subtle but important differences.

As a general rule of thumb, you want to avoid any boosted application that forces you to avoid det by using single figure ignition advance figures if using non forged pistons.
There will be exceptions, but its a good ballpark generally.

chip

27-09-2011, 11:49

Found this could be tempted or is it a sack of poo???

LINK

http://www.engine-dynamics.com/epages/es118981.sf/en_GB/?ObjectPath=/Shops/es118981_shop/Products/%22Clio%20Sport%20172%20/%20182%20Turbo%20Conversion%22

:D

IMHO its expensive for what you are getting (few hundred quid turbo probably and a 80 quid exhaust manifold etc) but on the other hand considering its including labour, it looks good value if you arent someone who enjoys working on their car (I do so I view paying labour as wasted money)
Would be interesting to see the quality of the mapping they have done on the standard ECU and whatever map sensor it is that they are running as obvioulsy its not what the ECU was intended for, but that doesnt mean it cant be done well.

Personally for the same money though I think you could DIY a proper forged build and a decent ECU that is mappable, so it depends how involved you want to get.

Fundamentally though, getting from 160ish bhp to 230ish on standard internals sounds like the sort of modest gain that you would expect to work fairly well from a low boost application.

tutuur

28-09-2011, 08:45

Thnx for explaining chip!

Why didn't we choose Honda? I know a 850hp sh*tvic which drives with stock gearbox. Even drags with it on grippy tires...

chip

28-09-2011, 10:01

Thnx for explaining chip!

Why didn't we choose Honda? I know a 850hp sh*tvic which drives with stock gearbox. Even drags with it on grippy tires...

I did choose honda for the engine and box funnily enough, I'm hoping to put a B18C4 into a mk1 clio to get the best of both worlds by combining the awesome honda mechanicals with the clio shape and handling that my mrs and me both like.

cliokiz

28-09-2011, 13:57

Chip,

If you do manage to get the honda engine in and running well, it would be very interesting.

Depending on how much work is involved, it could tempt a few people to ditch the Renault engine and go for a better engine and gearbox combo

tutuur

28-09-2011, 19:14

well take a look at this one then:

http://www.vdbworks.nl/projecten.php?projectid=25

this is from a dutch guy who runs his own custom/tuning company :)

TJ Dizzy

29-09-2011, 18:09

chip

30-09-2011, 22:02

Thanks for all the headsup chip :) I am tempted to just go for it and get it done but my mate has got a forged calibra turbo engine sat in his garage and telling me i can have it, he said if i get a Vauxhall nova he can fit it in for me so id be looking at more like 300+ with a few mods and it would work out alot cheaper than fitting a turbo in to a clio which he said would just end out with more problems than its worth mmmm what to do ay lol

Ive probably been in more variety of tuned C20LET fwd cars than anyone but literally a handful of people in the world I should think, I map loads of them and I write for Total Vauxhall, this is a corsa I mapped the other day at 380bhp for example:
http://i693.photobucket.com/albums/vv292/dewismotorsport/photo-1903.jpg

Video of some of the mapping here if you are interested:
http://i7.photobucket.com/albums/y251/chip-3door/misc/th_dewis-rollers.jpg (http://s7.photobucket.com/albums/y251/chip-3door/misc/?action=view&current=dewis-rollers.mp4)

You wont find many people more into those engines than me TBH and yet I personally wouldnt want another nova c20let as a trackday car really though (unless it was mid engined again like my old 550bhp or so one was)
The nova platform is quite short and quite narrow to be putting so much weight so far forward, and the suspension geometry is pretty wanting as well, so it ends up a real pig handling wise, turbo clio with 250bhp would monster most 300bhp novas round a track I reckon!

Also, the 6 speed box (F28) is very heavy, and the 5 speed boxes arent strong enough.
On the plus side though, LSD is only 600 quid and easy to fit, so half a clio one realistically.

I personally think a 250-300bhp clio if you can do it without it becoming a liability for gearboxes, and without too much weight to ruin the handling, should make a very good FWD trackday car.

I'm aiming for around the 300bhp or so mark with mine with the honda engine, although at this stage I still dont know if it will even fit or not in a way that isnt a big compromise yet. The sump and the subframe for example are going to occupy the same space which may prove an issue, and the weight does sit a little further forward as well.