TT'ing info request
Much to the amusement of some, I've decided to go ahead with my TT.
Two issues arise.
1) the con rods need adjustment
2) the throttle body likewise.
Does anyone know/have the precise details? Alternatively, where I might get the information?
I'm going to try Turbo Technics and a guy in California who's a bit of a guru in this field, but all suggestions gratefully recieved.
You'll all be invited to the blow the engine up party!!!
Thanks
Ian
Alan Jeffrey is the one recommended by Beaconsfield, he's in Plymouth though
Hello Ian,
If you are going to go Turbo charging, I urge you to include an intercooler in the system; this will help reducing the thermal stress to the engine under prolonged charge conditions. Con rods have no adjustment to speak of; if you are saying, you may need shorter con rods, this, I can understand as what is being suggested is a reduction in compression pressures. There are other ways to achieve the same.
My concern here commenting as a novice, the shorter con rod could have some ramifications to your valve timing and how this would or could affect achievement of optimum power and emissions for a given reduction of compression pressure. Is there another camshaft profile available?
I am not sure what you mean about the throttle body, but the fuel injector pump will require re-calibration to achieve optimum power as a result of turbo charging. Effectively, the engine will need re-building to ensure longevity; the costs could be quite high.
A cheaper alternative is to find a donor engine, already turbo charged by Mercedes or any other manufacturer of your choice and transplant that engine to your vehicle. The sprinter engines are popular choices.
I'll be there at your engine blowing up party.
Thanks Rakesh.
This is a Turbo Technics conversion kit, sometimes known as the Hughes conversion as Hughes of Beaconsfiled were the specialist fitters. Afaiaa, it was at the time only TT Conversion approved by Mercedes. hopefully this will asuage the naysayers :-)
The issue of the rods and body has arisen because originally one just popped them in the post to Messers TT for "adjustment" ie the machine shop shortened the rods and, from the instructions: "...the throttle body requires adjustment". What I need to find out is what the specified alterations are, and their values. Then I can commision a competent engineer to effect said changes.
Onwards and upwards......
Hi Ian
Was there not an issue with this turbo kit fitting RHD vehicles because of the steering column ?
You may be right but iirc if there is, there is a work around.
I have played around with turbo'ing a naturally aspirated engine. Go read Maximum Boost from Corky Bell.. practical hands on if a little uneducated on ECU/Fuel/Timing control.
1/ Fit an intercooler unless you want restricted to 3-6 psi or about 15-20% more power maximum. With intercooler you can go 50-100% more power if mechanics allow :-)
2/ Skip the injection system.. and fit a proper modern ECU with lambda sensor (or even better a narrow band lambda sensor). This will allow a PC to program the system. It will make it self learning a bit. Lots of fun if that is your bag. Mega-Squirt is DIY for few hundred .. or £1-2k for one that your tunner understands.
3/ If you go real modern ECU with electronic boost control you can tune around the compression ratio.. and get a far nicer engine to drive (dropping CR will kill low end power and impact fuel consumption)
4/ drivability of ECU system is far better .. but needs tunner to do cold starts tuning and part/off throttle too .. which is not where the power is .. but it is where it becomes nicer.
Issue becomes .. durability of engine.. are con rods forged, is cranks forged, pistons of decent material.. normal you can find someone who has pushed the engine to find out what has broken.. otherwise it is risk of blowing up (how cheap to replace) or lots of ££ to go fully forged engine..
Up here in Neepland.. the lot at Glasgow Airport would be my choice (AVA).. not a great building but they do know their stuff.. not sure how much they kept up with ECU work..
Machining Con-rods is old old school and not very clever as I guess they fit offset little ends inserts.. probably near as cheap to buy a new set of forged rods really.. and you need a full engine tear down too.. nah.. just boost her up and see what breaks.. replacement engines are cheap compared to mechanics time if you are paying..
" Up here in Neepland.. the lot at Glasgow Airport would be my choice (AVA).. not a great building but they do know their stuff.. not sure how much they kept up with ECU work.. "
Interesting that you mention AVA at Glasgow airport as I was going to recommend them to Ian because there specialty is turbo charging. They also have quite a bit of experience working on my G wagen.
As far as keeping up with ECU development they recently finished designing and installing this throttle body injection system with a programmable ECU for one of my cars. The fact they have there own rolling road means that everything can be properly set up and tested at all throttle openings before it is driven on the road.
Ian if you would like more details drop me a pm and I will put you in touch with Alan the owner of AVA.
IanA2 - do let me know when you come down, Hughes is about 500M from my house! Want me to pop in and have a chat?
Spider1V
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Spoken to him as he was reccomended by Turbo Technics, he in turn refered me to .....guess who.....yup TT. TT don't apper to have an email address and they don't/won't answer their phone (even the sales line!) so I'm going to door step them next week if needs be.
I have a contact in Beaconsfield who is/ will be, on the search too....
Happy days....