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Twingo Adey's Twingo GT (F4R+T 2.0ltr engine swap)

Right, a little recap for those at the back.

Engine is back in and running, built up in true pikey fashion. Meg 250RS rods and pistons, Cometic 1.9mm MLS head gasket. Modified 172 cams, 19T hybrid and 250RS injectors (got some new 250 map sensors to go in at the time of mapping too) Slapped in a new CG Motorsport race clutch to replace the dual friction one that was in there (no issues with the old one just wanted to make sure it could hold some more power). Ran in on millers running in oil and now on some more millers CFS. By the time its gets to Chris on Wednesday it will be up around 750 miles since putting it back together, fingers crossed if it was going to go wrong it would have by now 🤷‍♂️ I'm tempted to ask for the torque to be kept relatively low if possible and just hold it for as long as possible, this is banking on the cams actually helping push the power higher in the rev range. Its been a pig to drive in traffic as it currently cuts out when pulling up, so putting the miles on has been fun, luckily I live about 4 miles from a quiet motorway which I've been up and down a fair few times now 😆 so I'm looking forward to being able just to drive it normally again (y) I've cleaned up the bay a little also, relocated the brake/clutch reservoir to inside the car under the dash and used the freed up space to fit a breather catch tank rather than my normal pipe to somewhere handy. A new lambda was thrown in as the one in there was seemingly causing some issues where it would pin the ecu fully rich or lean. There was also a problem using the cooksport rail with the 250rs injectors, the retaining clips don't fit it, and the injector itself is slightly narrower than the r26 item meaning it could fully plunge into the inlet manifold and come out of the rail. I did actually call cooksport who claimed that they never had the same issue even without the clips, said they would call me back but never did... there was someone else on facebook with the same issue running the same style of injector. Anyway to cure the issue I had a friend from work spin up collars/spacers to sit on the injector, this stopped them being able to push into the manifold and when the rail was bolted up held them pinned in place. So far so good, hopefully they still work fine under high boost/fuel pressure.

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I've spent today prepping it ready for tuning, set the wheels straight on a friend ramp, one of the track rod ends was a bit seized, but nothing a bit of heat and some mole grips couldn't sort. I've actually set it quite conservatively to normal, -1.3 camber and about -0.05 toe out, plan is too see how it puts down the power and then ill adjust it from there. Plugs cleaned and checked, gaps set at .6mm.

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Anyway its time to play the guessing game again, What are your predictions????
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I set the toe to cup racer spec on the Clio so parallel and it’s awful on the road, especially under boost on a slightly in even road.
 
BOOOOOOOOM!!!!!!!!!

Nah only joking, so where are we at? Yesterday I took a lovely drive up to EFI Parts for a remap on the new engine setup. The drive was totally un eventful though it was a lovely day so I just took in the scenery (excluding the Birmingham area)

Once there a quick chat was had with Chris about the setup and expectations then whilst he did his Rainman thing with calibrating the ecu I fitted the 250 map sensors and set the actuator. The ECU on these is a dick to flash, around 7min a go, so everything takes a lot longer than a meg or clio. Initially it took about 45min to get it set up before it was on the dyno, once on though the calibration didn't take Chris long at all. Initially set up on gate pressure (I run switchable boost) which is now 15psi solid the car was showing good strong numbers (270ish bhp and 255ish lbft) and it was doing it with plenty of revs :D the thing was singing high!

Next up was mapping for high boost.... this is where things start to get more technical, It started climbing but very soon started to hit a bit of a wall... The hybrid turbo, though bigger and flowing well didn't flow well enough for the cams, the rear end is stock sized. Now I've introduced the 172 cams that flow very nicely they have more overlap than the stock Turbo camshafts, cams with more overlap don't tolerate high back pressure as much. We actually got to the point that adding more boost was causing the power to drop indicating we were choking the engine out. There are ways I can check to prove this but in reality I don't need too. If I want more power I need a bigger AR turbine housing or a bigger wheel put in my housing (still makes 300bhp and 290ftlb) I'm not going to lie, I was a little deflated but totally understand the outcome, its a chance you take when building a bit of a hybrid engine. That was until I drove the thing......

FARK ME, it doesn't half shift now, its quicker than it was and you rev it a lot more to make it move, It drives more like a big power N/A than a turbo motor. Peak power is being delivered right up top, It holds 280bhp and more from 5750 to 7200rpm, it was dropping off at about 6200 on the old setup. The spool up isn't effected too much either, about 200rpm later on this new setup. Rather than being delivered as a bit of a slug its been spread right out, the extra 1000rpm now also means I can do 60 to over 100mph in 3rd gear, on the road its savage. I swear this car has driven like 4 totally different ones with each iteration or step through this build.

TLDR, less (well the same) is more, still 300bhp different delivery.

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Good work Adey 👍🏼 I was thinking about doing the 172 cam swap but since moving house and all the diy stuff eating away at my savings thought I’d give it a miss. I could bet half this forum has been mapped by EFI though 🤣

Is that it for now or are you going bigger turbo?? If so Could be a good time to call midlands turbo and have the same turbo as mine 👀
 
quick go on the way to work, still 20 degrees outside so maybe more to come yet

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Wow 😮 I ain’t done one in ages. My 5.6sec 0-60 was done afew Decembers ago when I still ran ad08r’s. Think it’ll be loads better with the pilot sports tbh
 
not tried 0-60 yet, i fear i will kill something or just fill the road with smoke.

tempted to look at an apexi boost controller that can do boost by gear, only need a reduction in 1st and part of 2nd though
 
Very good 60-100 mate, you need to race Stavs MR2, very similar performance.

My FD did a 3.7 but then grenaded itself 10 mins later so not sure it counts haha
 
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