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Thread: Twin Turbo v6

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    Twin Turbo v6

    can somebody tell me everything id need to build myself a twin turbo v6 motor for an escort using as much standard parts as possible

    i plan on using a custom inlet with a throttle body

    rods?
    cranks?
    pistons?
    etc etc

    also.. what sort of results would i be looking at power wise with sum descent turbos

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    Re: Twin Turbo v6

    Can you fit a twin turbo V6 in an escort?? I'd like to see it

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    Re: Twin Turbo v6

    Ok then, heres our TT V6 install in an escort. Its the 24v BOA cosworth engine (based on the cologne) now out to 3.1 litres with around 7.5:1 comp, forged pistons and a few other goodies.
    Turbos are spec'd T3's.

    As you can see the bulkhead is a good 12"+ back!
    If you fit it further forward the intercooler and rad could go deeper under the slam panel but I kept them nearer the engine for shorter pipe runs, weight distribution and to protect them from knocks out on the track






    What engine were you thinking of using? I doubt any will have room to mount the turbos either side of the block as escort bays are quite narrow hence mine being up on the top (raised bonnet)

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    Re: Twin Turbo v6

    The easiest is just a plain standard 2.8 or 2.9, as long as you have good control over fuel and timing (=programmable management) that works fine.

    A step better is a low compression engine, I have built a 2.8 with US low comp pistons (8.2:1) but 2.9 pistons may work fine too. Apart from a relocated thermostat (top hose) the engine was all standard parts - reground cam and ported heads, but standard crank and rods. This gave something in the region of 300 bhp. We used 2 Mitsubishi TD04-15T turbos.

    Gustaf

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    Re: Twin Turbo v6

    What about the crankshaft though?

    Would have thought a steel one was needed in a cologne for any serious power/torque boost?

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    Re: Twin Turbo v6

    Quote Originally Posted by rich_mkii_rs2000 View Post
    What about the crankshaft though?

    Would have thought a steel one was needed in a cologne for any serious power/torque boost?
    Mine has a few tricks in the bottom end, but no steel crank. Don't forget that it won't have to rev particularly high

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    Re: Twin Turbo v6

    when i got my single turbo capri set up at track and road steve said that the crank was the weak point.

    (no well actually he said "its a cologne" when i asked him that)

    It is a lightened and balanced bottom end, but not steel. Any idea what level of torque a cologne crank would take?

    mines currently on 215ft/lb of torque.

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    Re: Twin Turbo v6

    2.9i tt is a better engine altogether and theres a few about

    MY MK1 ESCORT (Now turbo'd)

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    Re: Twin Turbo v6

    24V TT manifolds ! under construction


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    Re: Twin Turbo v6

    I'd say the crank is a problem when you need to rev it lots, as David says you can keep the revs down and still have decent power with the turbos.

    I agree though that a 2.9 probably makes more sense to build on.

    Our 24v manifolds :-)




    Needs a space framed front end though...

    Gustaf

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    Re: Twin Turbo v6

    Just changed the pipe size to 1 1/2"



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    Re: Twin Turbo v6

    rob i have to say you are the mutts nuts when it comes to turbo manifolds matey, would like to put an order on some of those 24 valve ones but the pinto is taking me long enough lol, 300+ horsepower is very tempting though.
    cheers
    Ant
    I cant afford to drive it but dam its gonna be fast.

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    Re: Twin Turbo v6

    My mates got a 2.8i V6 sierra estate with a huge ball bearing turbo from the U.S.A. He using uprated rods , low comp forged pistons , rs500 intercooler , modified heads and it makes 210 bhp and 300 ibls feet of torque on 15 psi of boost . The cars runs 13.5 sec quarters at santa pod on street tyres at 102 mph . The 6 valve heads are rubbish he reckons and that's whats holding back the bhp on it . It's seriously grunty though making 300 ibls/feet at about 3000 revs !!!!! .......
    Last edited by mk1 gaz; 23-12-2006 at 17:20.

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    Re: Twin Turbo v6

    The main problem with the V6's is there inefficiency, they have a lot of trouble with heat around the heads and turboing them compounds it.

    They really are not an ideal engine for an Escort, you would be much better off with a N/A V8 as it will make all the power you want without the hassles of the turbo.
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    Re: Twin Turbo v6

    Well unless you are willing to mod the car as far as Dave then it will probably mess the handling up too. Best off sticking with 4 pots in Escorts, although for straight line stuff a cossie v6 is a cheap way of going fast (standard engine seemed to do excellent at Brunters). I'd love to see an LS1/2 V8 in an Escort although its probably far better suited to a capri, come on Grant...

    She's built like a Steakhouse, but handles like a Bistro

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    Re: Twin Turbo v6

    Quote Originally Posted by mk1 gaz View Post
    My mates got a 2.8i V6 sierra estate with a huge ball bearing turbo from the U.S.A. He using uprated rods , low comp forged pistons , rs500 intercooler , modified heads and it makes 210 bhp and 300 ibls feet of torque on 15 psi of boost . The cars runs 13.5 sec quarters at santa pod on street tyres at 102 mph . The 6 valve heads are rubbish he reckons and that's whats holding back the bhp on it . It's seriously grunty though making 300 ibls/feet at about 3000 revs !!!!! .......
    seems a bit down on power there gaz mine is only on 6psi and its 225bhp

    MY MK1 ESCORT (Now turbo'd)

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    Re: Twin Turbo v6

    It's probably down to the 2.8 heads having the siamesed exhaust ports and you have an extra Turbo!
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    Re: Twin Turbo v6

    Yes if would never make any decent bhp but foooook me was it torquey . It went well too , you could surf the torque wave on half throttle and it was just a fast as full throttle was !!!!!! .........

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    Re: Twin Turbo v6

    found this while surfing...
    http://www.whynotracing.com/gallery/album03/201_G

    "Nästa foto" button in up right corner...
    Cheers, Tepi

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    Re: Twin Turbo v6





    That is not a Capri any more, it's only a huge Engine with four wheels on it... Very nice though

    A few years ago, I planed to do a Turbo-conversion too. So I talked to a guy that was involved in engeneering the V4 and V6 Engines at Ford Cologne. He said, that the engine can take the pressure of a turbo very well when it comes to the crank. But you should avoid high revs as the crank starts to bent and vibrate and finally tears the bearing supports out of the block, game over! At the beginning they had a lot of trouble with that. To make the engine strong enough for everyday use, they just took longer bolts to mount the bearing supports... To be sure, most people that build a V6 turbo engine use better bolts for bearing supports and rods, that seems to be the most important upgrade.
    The guy I was talking to finally advised me to use a turbo that provides good pressure in the low and mid RPM range. So the engine will rather make lots ot torque the bhp, but remember: horsepower sells cars, torque winns races
    An other weak point of the cologne V6 engines is surely the siamesed ports on inlet and exhaust ports, not a masterstroke of german engeneering... But it was the cheapest way to build a V6 if you take the old V4-heads and just add one more cylinder... That restricts the airflow and it's nearly impossible to build a natrually aspirated high output engine with these heads. To see 200bhp you have to put quite a lot of money into the engine, a turbo is by far the better way to get more power out of it. I've also seen some people using the US-version of the V6 heads as they have three inlet and exhaust ports per head.
    But with a turbo this shouldn't be that problematic as the air is forced through the intake manifold.
    Furthermore the temperature of the engine is a very important thing to look after. The pistons of the 2.8i are quite huge in diameter, so they have problems to lead away the heat to the block and if you run the engine at a lean fuel-air ratio at full boost you might end up with a hole in the piston... To avoid this problem you need to have a good working engine management system. A lot of people tried to adapt the Bosch K-Jetronic injection system for turbo applications, but only a few made it work well. That is one of the more complicated problems you will have when doing a V6 turbo conversion.
    My V6 turbo engine is a 2,8i out of a Sierra XR4i and was originally used with a carb on it. It was build in Switzerland, has low compression forged pistons, ballanced and revised rods and crankshaft, ported heads, special camshaft, HD oilpump ect and can take up to 17 psi. But I have to say, that I never made own experiences with that engine, as my plans for my Capri changed. The engine is now laying in the garage and waiting to my brothers Capri to get fixed after it's crash...

    Good luck for your project!

    Daniel

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    Re: Twin Turbo v6

    The Capri above is the car where the manifolds I posted pictures of went.

    I still like to think of it as a Capri though ;-) Unfortunately my friend who owned it sold the car before we made anu decent runs. 11.30s 1/4-mile was really a half-miss.

    Gustaf

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    Re: Twin Turbo v6

    Quote Originally Posted by mk1 gaz View Post
    My mates got a 2.8i V6 sierra estate with a huge ball bearing turbo from the U.S.A. He using uprated rods , low comp forged pistons , rs500 intercooler , modified heads and it makes 210 bhp and 300 ibls feet of torque on 15 psi of boost . The cars runs 13.5 sec quarters at santa pod on street tyres at 102 mph . The 6 valve heads are rubbish he reckons and that's whats holding back the bhp on it . It's seriously grunty though making 300 ibls/feet at about 3000 revs !!!!! .......

    maybe, but to me that just shows up how crap the heads on these engines are my 8v 2.2 4pot made 350lft at similar low revs AND 350bhp on a not particulary big T34

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    Re: Twin Turbo v6

    Theres no reason for a steel crank. Most of the V6 turbo kits were bolted on to stock engines. Stick with low boost and just mod the AFM to up the fuelling. If you want to do a proper job its still not neccessary its the mains that are weak on this motor. If you want turbo try this manifold for a 2.9 single turbo. Made in SG75 nodular iron, this has the best thermal properties for a turbo manifold unless you want to go ceramic.


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    Attached Thumbnails Attached Thumbnails 2[1].9tmani_2.jpg‎  


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    Re: Twin Turbo v6

    This is all very nice, but what about turbocharged essex V6? I have been collecting parts for some time and am about to start the project. I know of one that has been done, but this was used in a small helicopter so was designed to run with the crankshaft vertical. It was also cast in aluminium...

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    Re: Twin Turbo v6

    If your gonna use a big heavy Ford V6 i cant see why you wouldnt start with the 24v, it makes the most power standard and will make more power turbo'd.

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    Re: Twin Turbo v6

    agree with above

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    Re: Twin Turbo v6

    how come the mondeo 24v is never used ?would have thought they would be a lot lighter

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    Re: Twin Turbo v6

    mainly cos its needs loads of mods to get it set up for front engine rwd.

    The cossie 24v is adirect replacement for the cologne 2.8 and 2.9 so its an easy swop.

    There are cars with the mondeo V6 in, normally fitted on a V8 T5 with an adapter plate and modded input shaft along with custom flywheels etc etc.

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    Re: Twin Turbo v6

    are they any good and are they alloy blocks

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    Re: Twin Turbo v6

    I dunno, heard they were a bit weak but not got a clue really, deffo lighter than the cossie lump though.

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    Re: Twin Turbo v6

    The mondeo is lighter but I heard from a fairly good source that the rods are it's weakness. Noble use this engine for up to 400 hp or thereabouts in turbo guise.

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    Re: Twin Turbo v6

    cheers for the info note,d the name{boosted ls1 have you a turboed chevy?)very pissed but would like info on blown sbc

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    Re: Twin Turbo v6

    Quote Originally Posted by brettp View Post
    cheers for the info note,d the name{boosted ls1 have you a turboed chevy?)very pissed but would like info on blown sbc
    Yes, I have turbocharged the 5.7 ls1 and also built blown 427ci/7.0l Darton versions. These have billet titanium rods inside and a load of other good stuff. Oh and a pair of GT37's. I'm expecting about 1000 hp when it hits the road. It'll be installed into a heavily modded monaro.

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    Re: Twin Turbo v6

    any pictures ?

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    Re: Twin Turbo v6

    Not sure what pics you'd like to see. Here are a few.




    1. Darton linered 427 turbo block and custom pistons.



    2. Turbo 5.7 engine


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    Re: Twin Turbo v6

    that would look so good in my car

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