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

[Adey]

Make sure you have the one way valve in, and the right way around.

you don't fit one on a clio 172 turbo conversion, and unless its in the servo itself there wasn't one on the Twingo that i can see? only one way valves in place were for the crankcase.

 

[Adey]

Make sure you have the one way valve in, and the right way around.

Got me paranoid so I double checked, there's a one way valve fitted to the part that pushes into the servo itself, can suck it but cant blow down it which makes sense based on the Twingo's original pipe setup

 

[DaveL485]

Got me paranoid so I double checked, there's a one way valve fitted to the part that pushes into the servo itself, can suck it but cant blow down it which makes sense based on the Twingo's original pipe setup

Best to check mate, boost in your servo is not something you want... it does the opposite to servo assist!

 

[Adey]

its there wonder if itd slam the brakes on if not there? lol

 

[DaveL485]

its there wonder if itd slam the brakes on if not there? lol

The brake servo assists braking by creating a negative pressure area under (kind of) the pedal, and it effectively sucks the pedal down, the effect is multiplied by the large surface area (which is why servo's are big flat round things).

If you fill it with boost with a one way valve the wrong way around (thus holding the pressure in the servo) it would reverse the effect, making it ridiculously hard to press the pedal down, if you could at all. No brakes.

 

[Adey]

I wont embarrass myself with pics of my poor welding repair on the down pipe but it's done wrapped and back on, just need a gasket so I can clamp it all up. Wrapped up there's space for me to stuff my fat fingers between it and the heat shield so hopefully its got enough clearance not to cook everything if it does we will just have to have a custom one made, or a 2.5 inch version fitting if there is such a thing?

I should have a driveshaft here tomorrow that might be the correct size needed for me to make a usable one, again fingers crossed

 

[DaveL485]

You're welcome to pop up if you need something welding mate (albeit MIG/mild).

I promise I wont breathe on you.

 

[Adey]

Cheers me dears, managed it for now if even just a temp fix wanted to crack on but with homeschooling 3 kids getting away from home for any length of time is a pain

 

[Adey]

So here's a fun PMT fix after my driveshaft issue. Take one £13 clio mk3 dci shaft and strip it down, rebuild it with a 172 outer half shaft but dci spider and voilà one shaft thats looks pretty suitable. It needs bolting up with a 172/na/f4r support bearing as the one for the f4rt/197/bigger gearbox sits too far from the block. I do need to shave the block a touch to miss the inner cv boot and give a little clearance as that's super close. But Renault parts bin special looks to have saved me getting custom shafts made too

pics are crap.

First pic is GT shaft, dci shaft and 172 half. Second pic is the GT shaft and the hybrid.

 

[Adey]

Didn't get as far as I wanted today but I did hit that milestone of putting it back on all 4 wheels. Granted its got to go back in the air again but its a big moment for anyone building any car, feels like one huge step towards driving it.

I removed the driveshaft assembly and took a slitting disk to the block, Im pretty sure it's new casting vs the old 172 f4r but serves no purpose for me other than to being too close to my inner cv joint. 30 seconds with a slitting disk followed by 30 with the flap wheel and jobs a goodun

Shaft was built up for the final time and fitted with the 172 intermediate bearing on the block. I had to pop out for a hospital appointment so swung by the local breakers yard on the way home for 2 hub bolts, I cut one off when disassembling and lost the other but with them that meant both hubs could be nipped up and the main hub nuts cranked up too.

Wheels back on and rolled back on the drive, I did attempt a start as I want to spin it down the road and make sure all is smooth but the battery was flat. Phone also died half way through so didn't get any pics of the space I created on the block.

Still lots to do and though I've got plenty of time I'm seriously lacking funds so I'll just have to wait. On track for some road testing hopefully in April all being well

Thanks for looking in

 

[Brigsy]

Coming together nicely mate. Just the finishing touches now

 

[Adey]

Coming together nicely mate. Just the finishing touches now

cheers man, its all them little bits that take up all the time and give the most stress. Shouldn't be too much longer though, the main bulk of it has been quite entertaining to do/slap together, the finish is clearly in sight now though.

I'll class it as a win when I can go up and down the road with no rubbing or binding issues with the drivetrain, ill annoy the neighbours with that tomorrow

 

[Adey]

shifter is backwards, so dog leg first and reverse where 5th is but other than that all seems good. I think the fix is to find the matching shift tower and cables to the box as swapping them over just causes it to lock out of all gears.

 

[Steve Swan]

So left and right are ok but back and forth are reversed correct? You need to reverse a lever somewhere to reverse that motion or put a reversing link in gonna be a bit tight, but I have every confidence in your ability. When are you putting the second engine in the back?

 

[Sparkysparks]

You have to put a pipe on that intercooler or you'll get a boost leak. You might even lose power.

Jokes aside. This is awesome
Will be mental!

 

[Neal R19]

Are the neighbours as impressed as we are?

 

[Adey]

So left and right are ok but back and forth are reversed correct? You need to reverse a lever somewhere to reverse that motion or put a reversing link in gonna be a bit tight, but I have every confidence in your ability. When are you putting the second engine in the back?

It'll probably be as simple as having the matching shifter mech, that said it wouldn't actually bother me as is and I'm in no rush to "sort" it for getting the car on the road.

You have to put a pipe on that intercooler or you'll get a boost leak. You might even lose power.

Jokes aside. This is awesome
Will be mental!

lol was thinking that earlier. I wonder if running it atmo it produces more power than a stock GT, got to be over 100bhp with the turbo off hasn't it?

Are the neighbours as impressed as we are?

I hope so Luckily I get on with them alright, I don't do it often and no ones complained yet about this or the Dope which is quite deep toned at idle.

 

[yotomeczek]

I wonder how much heavier the 2.0 turbo is (compared to 1,2T)...

 

[Adey]

I guess about 30KG but i could be very wrong. I dont have anything big enough to weigh the engine i have here. That said the 1.2 is easier to move about than the f4rt.

 

[Brigsy]

I had the same shifter issues with the Kangoo, 1st backover instead of forward etc. All the Renault floor mounted shifters work the same. As mine is 6 speed this caused a bit of an issue and required a bit of thought to get round.

Is yours a dash mouted shifter? if so Renault Traffic works with modifications as it pivots from the opposite side. I also seen vauxhall shifters and toyota similar design.

The other option is to modify the shifter with a pivot to reverse the mechanism, or change the pivot point on the box. Some of the pivot points are interchangeable and have different brackets that bolt on the box to hold the cable in the right location To sort the issue.

I made up custom cables for mine, you can buy custom length custom gear cables easy enough, but at a ton a cable i was not that confident at ordering any until id made it work in a fashion. All the lengths are easy to find, in the end i cut and tapped the end of a traffic cable. Works great.