Author Topic: C20LET tuning guide, FAQ  (Read 31591 times)

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Offline Bad Kid

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Re: C20LET tuning guide, FAQ
« Reply #15 on: March 06, 2008, 23:58:49 PM »
Max-boost has some excellent information on intercooler design and fitment. Well worth reading. I'd say around the 10 litre mark would be a good bet for P2!
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charlieuk1973

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Re: C20LET tuning guide, FAQ
« Reply #16 on: March 29, 2008, 20:34:07 PM »
ye mate,im runnig eds phase1,i got front mounted intercooler.since intercooler has gone in,im getting alot off backfire and loss in power.would this be to do with a standard 3bar fuel reg?i got a fsc reg coming,will this cure my problem?

Offline Bad Kid

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Re: C20LET tuning guide, FAQ
« Reply #17 on: March 29, 2008, 21:10:29 PM »
That's a bit off topic Charlie, you should really start a new thread instead of using this one.

If your problems have started since fitting the FMIC, then check your pipework and the IC itself for leaks. Do not fit an FSE, they are crap. Get a decent adjustable regulator and have the fuelling set by somebody with a wideband lambda
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gorytus

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Re: C20LET tuning guide, FAQ
« Reply #18 on: March 29, 2008, 21:58:07 PM »
hhmm, the outlined 'Stage 2, 250-300bhp' using vmax evo5 chips needs a little tweaking.

Critically, your fuel pump must be uprated. Stock pump cant take the pressure...literally. particularly 10+ year stock pump on 10+ year wiring.
Seperated wastegate 70mm downpipe  essential to achieve best out of those chips.
Intercooler - 10 litres as quoted above? why? Design far more important than volume. I use a lower volume fmic at a higher power level in a very hot environment and have no charge temp problems.
Adjusted actuator? really needs upgrading to cope with the higher boost.

Offline Bad Kid

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Re: C20LET tuning guide, FAQ
« Reply #19 on: March 29, 2008, 23:58:53 PM »
Gary there are plenty of people running stock pump at ~300bhp with no issues. Depends on the pressure you're running though. Bigger injectors could mean a similar to stock pressure.

Likewise virtually nobody uses a separated wastegate for up to 300bhp, and the stock actuator is fine if reinforced with a helper spring or on a MBC!

Not sure on intercooler design but it's just a general guide here.
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Offline Chip

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Re: C20LET tuning guide, FAQ
« Reply #20 on: March 30, 2008, 00:41:04 AM »
hhmm, the outlined 'Stage 2, 250-300bhp' using vmax evo5 chips needs a little tweaking.

Critically, your fuel pump must be uprated. Stock pump cant take the pressure...literally. particularly 10+ year stock pump on 10+ year wiring.
Seperated wastegate 70mm downpipe  essential to achieve best out of those chips.
Intercooler - 10 litres as quoted above? why? Design far more important than volume. I use a lower volume fmic at a higher power level in a very hot environment and have no charge temp problems.
Adjusted actuator? really needs upgrading to cope with the higher boost.


If you look in the guide I wrote for redline last year, I covered that as part of the 300bhp+ stage of tune, so I agree with you, Chav seems to be missing the fact that some people have problems at this level (for the reasons you mentioned) but I dont think that its worth worrying about too much, he's done a good job of copying over some of the more key bits of information from max-boost and TBH at the end of the day the site itself isnt really perfect so you cant really expect a guide written from it to be either, so I think he has done a reasonable job. I cant see anyone taking this guide totally literally anyway as its very clearly just a quick copy of some of the key stuff from maxboost, which in itself is mainly a collection of articles from elsewhere of little really specific LET relevance, as the person writing it has very limited experience of the LET himself (johna) so im sure most people wouldnt treat it as an ultimate reference anyway and would seek proper expert advice if they werent sure.


Here is the one that I wrote for redline magazine, it was out at about april 2007 IIRC, but I dont know the exact month:
http://www.clubcalibra.com/index.php?topic=14584.0


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gorytus

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Re: C20LET tuning guide, FAQ
« Reply #21 on: March 30, 2008, 01:07:15 AM »
Quote
im sure most people wouldnt treat it as an ultimate reference anyway and would seek proper expert advice if they werent sure

Indeed, just slightly concerned that the fuel side of things was dismissed so lightly. For the sake of 90 odd quid tis the difference betweening actually achieving the performance or losing your engine.
A key design facet of both EDS & Vmax chips is for 'fuel cooled pistons' (9.1 a/f at full boost...) - the standard LET pump just cannot provide that flowrate, certainly not when pushed at 4.5 to 6 bar depending on injectors.

 "virtually nobody uses a separated wastegate "
and virtually nobody gets the stated 310bhp & torque line either...


Offline Chip

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Re: C20LET tuning guide, FAQ
« Reply #22 on: March 30, 2008, 01:15:36 AM »
Indeed, just slightly concerned that the fuel side of things was dismissed so lightly. For the sake of 90 odd quid tis the difference betweening actually achieving the performance or losing your engine.
A key design facet of both EDS & Vmax chips is for 'fuel cooled pistons' (9.1 a/f at full boost...) - the standard LET pump just cannot provide that flowrate, certainly not when pushed at 4.5 to 6 bar depending on injectors.

 "virtually nobody uses a separated wastegate "
and virtually nobody gets the stated 310bhp & torque line either...




He's just going by what he has read I think mate, but yes you are totally correct, so I dont suppose it hurts to mention it.
I reckon based on what ive seen firsthand probably 80% of cars cope ok on a standard pump setup at "normal" (ie standard or mild hybrid k16) evo5 levels of tune (which realistically is about 280bhp for most people), but obviously a 1 in 5 chance of an expensive meltdown isnt ideal when like you say 90 quid can stop it.

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Offline Bad Kid

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Re: C20LET tuning guide, FAQ
« Reply #23 on: April 01, 2008, 00:43:10 AM »
Chip I don't think anything you've ever typed hasn't already been said before, by somebody, somewhere. Except maybe that brilliant time you said that Japanese people aren't Asian, lol.
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Offline Chip

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Re: C20LET tuning guide, FAQ
« Reply #24 on: April 01, 2008, 00:53:00 AM »
Chip I don't think anything you've ever typed hasn't already been said before, by somebody, somewhere. Except maybe that brilliant time you said that Japanese people aren't Asian, lol.

Ive never invented my own word, I just use english ones normally, so yes each one has indeed been said before.
What I actually write about though, is my first hand knowledge and experience not just copied off a website that some bloke wrote mainly by copying off other websites, so in that respect is very different to what you have put here of course.

What on earth are you on about with japanese and asian people? Is this another one of those things where you have followed me around the internet trying desperately to find a mistake ive made in one of the 10s of thousands of mainly technical posts Ive written? If so have the same response as last time cause I cant really be arsed to write you a new one TBH, lol


You really do seem very desperate to try and prove me wrong on just something *anything* purely for the sake of doing so, presumabley cause you are still sore that you get banned from sites for giving bad tech advice whilst I get approached by admin of the same site and asked if i will consider being an official tech adviser for them? (MIG I mean)

Its very sad that just because I point out that there are MASSIVE technical errors in the rubbish you chat because I want to make sure that people dont get misled by your pseudo technical nonsense that you spout without understanding it that you somehow want to "get revenge" by desperately trying to find something *anything* in fact to trry and pull me up on no matter how trivial.
I dont do it to make you look stupid, you make YOURSELF look stupid, my only motivation for correcting you on things is so that others arent misinformed about stuff that will potentially damage their car a great deal.

You really need to just get over it, I know a sh*tload more about cars, and specifically tuning than you do, big deal, that doesnt mean your life is over, just get used to it, as someone who has worked as a technical consultant to car companies, technical writer for various magazines and is 10 years older than you, its pretty inevitable that its going to be the case, so instead of getting so wound up when I give you the benefit of my advice, why not just have the sense to learn from me instead, after all thats partly how I know as much as I do, from listening to others who know far more than me, I still do so even to this day in fact as im privledged enough to count as friends some of the countries most knowledgeable people, and instead of spending my entire life desperate to correct them on some minor technicality (which invariabley you seem to get wrong more often than right anyway ironically) I just learn from them and appreciate them taking the time to tell me stuff.


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DrZux

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Re: C20LET tuning guide, FAQ
« Reply #25 on: April 01, 2008, 01:33:31 AM »
here we go again  ::)

Offline Ash,

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Re: C20LET tuning guide, FAQ
« Reply #26 on: April 01, 2008, 01:41:56 AM »
You two dont half get annoying.
Can you just settle this with violence instead of making the rest of us read through your drivvle,

Offline BadBoyTurbo

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Re: C20LET tuning guide, FAQ
« Reply #27 on: April 01, 2008, 05:45:30 AM »
Yeah it really is annoying!

Chip doesn't have the ability to let things go by the looks of it, always has to come on with a smart-arse-know-it-all answer to most technical threads.  at least Chav is doing it for the club members and took hours to type it all out, whereas Chip just comes along and moans with overly dry replies.  ::)

Karma given chav for effort

This is where I would go for LET tuning advice : http://www.wallaceperformance.co.uk/vehicle_specific.htm

Offline Chip

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Re: C20LET tuning guide, FAQ
« Reply #28 on: April 01, 2008, 11:11:18 AM »
Yeah it really is annoying!

Chip doesn't have the ability to let things go by the looks of it, always has to come on with a smart-arse-know-it-all answer to most technical threads. 
If you look up, I was only actually responding (mainly defending chav as at least he has tried his best even if his knowledge is obviously a bit lacking) to posts by another user, it wasnt me bringing anything up at all.


This is where I would go for LET tuning advice : http://www.wallaceperformance.co.uk/vehicle_specific.htm
As far as im aware, WP wont do much in the way of giving out free advice, rather unsurprisingly for a business, but they certainly know what they are doing, Russ's mk2 has been an entrant for the last couple of years in the TOTB team that I manage  and is a testament to their talents.
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Offline stratrovarius

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