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Madmac Motorsport's Twincharged Evo 5

598553 Views 2421 Replies 217 Participants Last post by  Madmac
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During the winter build of the old Evo 5 hillclimb slag I decided to look at ways of reducing the turbo lag which was becoming an issue and costing precious hundredths of seconds on the hills last year. It never lacked top end power but the lag really started to get to me and i knew i could make it quicker point to point by reducing the lag - but keeping top end power.
I looked at many possible ways to do this but in the end settled for adding a supercharger to run in conjunction with the turbo.

Designed and built by myself with input from friends and members on MLR, most parts have been fabricated in my garage from whatever was lying around, the end result has been worth the blood, Sweat and tears I've put into this.

We've had her on the dyno at Wallace Performance in Aberdeen and had surprisingly few teething problems considering the unknowns and the huge amount of bespoke parts that needed to be designed, fabricated and made. Initial mapping is done now and the whole package is showing some serious potential! We've decided to keep the system at it's minimum until i do reliability tests and learn how to drive it properly :angel:

I've also designed and built a tubular front subframe and arms (total 9Kg:D) to reduce front weight and while i was at it, it seemed rude not to play with the suspension geometry!

I want to thank a few people for their input and help:

Russ and the guys at Wallace Performance who did the mapping and supplied parts/tea/banter etc. Top guys and never ones to shy from a challenge! Can't thank you enough:smthumbup:D. http://www.wallaceperformance.co.uk/

My mate Steve Marr who is the main technical guru, and who i regularly bugged to ask lots of questions on a daily basis:smthumbup.

My mate Graeme Wight Jnr for his help with the front subframe and major suspension geometry changes, Exhaust and general setting up

Alan Young Engineering Ltd for the quality machined bespoke pulleys and parts, Spot-on parts and great prices http://www.timingbeltpulleys.co.uk/pages/home.php

And everyone else who suffered because of my constant lust for knowledge during the build:smthumbup:D

As yet i've to do some miles and get her setup for the start of the 2010 Scottish Sprint & Hillclimb Championship, so for the moment i'm being realistic about expectations & screwing the nut until i check everything over and get used to driving it. Hoping to do some track testing soon though. I've had her out for a short drive and so far the whole package is working impressively. Instant delivery at anything above 2500rpm with absolutely awesome accelleration in every gear! This is on it's lowest boost setting too....

Over the next few months The guys at Wallace Performance & I are going to refine some of the setup and see what she's really capable of! We know we can find a lot more power & torque with some simple changes.

Meantime i'm happy with the initial results and looking forward to Doune Hillclimb in 2 weeks:D:D Should be fun!

Keep watching....;)

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don't know what you are all moaning about. I get paid for my services every weekend :)
They must be scrapping the barrel up your way then Young Un. :mhihi:
But no one wants your advice :lol:
to keep him quiet :mhihi:

saying that did Kenny pay you for lifting your bonnet to show us your engine! ;)
I'm afraid that is a sign of the times and i blame a good portion of this mentality on the forums. They are great for the social aspect but they are utterly terrible on occasions for people writing utter rubbish on a subject they know little to nothing about. People get used to receiving what they perceive as the answers to everything for nothing - regardless of whether the answers are right or wrong, its an answer!

As a tuning business i get bombarded with these pm's/emails/phone calls. You just have to write off a chunk of your working life to it because although many are time wasters, quite a few are genuine enquiries from decent folk. Nature of the beast. Spend 3 hours putting a big quote together with lots of detail as that is what they ask for and say ".... final price £5,500" only for them to never reply or to say "oh i thought it would be £500" :wallbang: A plumber wouldn't show up at your house for free and you can bet your ass most people wouldn't stop 2 hrs after work for free in their job each day!

What you can't do is give your technology away because be assured someone else will sell the ass out of it for nothing. Set your line in the sand and stick to it. Good luck and keep the faith Donald :smthumbup
Errr I'm a plumber,go to folks houses all the time and quote work for free..some you win some you don't. Lol:crackup:
Ok, an update on the car for a change....

Having done very little so far this winter it's time to do a few jobs to get her ready for this season.

There was a few things we didnt get wired up or working last year as we ran out of inputs on the Motec M800. The launch and traction control could only be activated by accessing the ecu amongst others so I've bought an expander. This will allow us to wire up map switch, TC and LC and also log more intake temperature probes.. I'm looking at also using a modulated output to control a new valve in the system that keep pressure in the system under certain conditions.

I'm not going to get a chance to rebuild the engine this winter so it'll have to do another season. There's no evidence to show any issues with it.

I have the samsonas box and drenth shifter up for sale as theres a sequential box on order from samsonas. That'll probably be fitted close to the first event.

Other than that, the rear bumper is almost finished and I intend to make the side pods in carbon to remove a further 14kg from the car. This.will complete the whole floor in carbon and I can sell on the grp kit that has served us well.

I wanted to try and build a second exhaust for the wastegates but that's unlikely to happen before the start of the season. The 3.5" exhaust is too restrictive for the twincharger due to the amount of air the system pumps through it and we reckon theres still more power to wring out of the system yet by adding the second exhaust.

Photos of the rear bumper with the strakes fitted to follow
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I spent the weekend preparing the side-pod moulds for using in the oven. The areas inside the wheel tubs were not ideal and made to accommodate 17" tyres so when we went up to the 18" avons they rubbed on the ends of the sidepods. The moulds now have concave areas inside the tubs so there should be no clearance issues on these carbon ones. I've worked out material usage and weights and expect the side pods to weigh no more than 4kg each. Any less is a bonus of course.

I have also worked out how much it costs us in materials and time to make a complete underfloor/bumpers etc in pre-preg carbon so if anyone wanted us to make them a full set we know what we would have to charge. In a nutshell, there's £4300 of materials plus 380 hours to make both bumpers, front floor, centreboard, side pods and a rear bumper :eek:. To make a set for sale we would have to charge £7000 and that's us working for £7 an hour.... :cry: We don't expect many to be ordering a full kit of course but the option is there if you're feeling flush ;)

The GRP set come off the car at 56kg complete, heavier than we first weighed it when it was made. This is due to moisture absorbsion and the weight of the paint :blah:. The new carbon set looks to be on target to be 24kg for all the parts :D.

I'll get round to posting pics soon. We're preparing for 14 cubes of cement to arrive tomorrow to lay the floor of our workshop extension so we're a bit pushed for time today
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. We're preparing for 14 cubes of cement to arrive tomorrow to lay the floor of our workshop extension so we're a bit pushed for time today
Bet you've got a twin charged power float too! ;):lol:
Bet you've got a twin charged power float too! ;):lol:
Not twincharged but it's running on 100 ron race fuel :D

4 of us on the barrows, 2 of us on the float. I remember what it was like last time once the tanker arrives, 30 mins to unload 7.5 cubic metres of concrete with wheelbarrows, relentless.

There's a huge hole in front of the garage needing filled so we're doing that to make use of the second full tanker. Cant get tiddles out of the garage until thats poured.:lol:
It would be nice to see this car at TOTB this year?
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It would be nice to see this car at TOTB this year?
Im going to struggle to get many events in this year as it is. Problem is the cost of the weekend is a huge chunk of cash I could use to compete in the Scottish hillclimb championship through the year. All spare cash is also being channelled into the workshop extension now. Never say never though
Not twincharged but it's running on 100 ron race fuel :D

4 of us on the barrows, 2 of us on the float. I remember what it was like last time once the tanker arrives, 30 mins to unload 7.5 cubic metres of concrete with wheelbarrows, relentless.

There's a huge hole in front of the garage needing filled so we're doing that to make use of the second full tanker. Cant get tiddles out of the garage until thats poured.:lol:
Check the small print, it used to be 5 minutes per cube on the 6m trucks, so when they brought the bigger trucks in we get an extra 7.5 minutes, it can make all the difference! :D:)

I hope you get a break in the weather, or it's inside :smthumbup
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Check the small print, it used to be 5 minutes per cube on the 6m trucks, so when they brought the bigger trucks in we get an extra 7.5 minutes, it can make all the difference! :D:)

I hope you get a break in the weather, or it's inside :smthumbup
Yea so far the weather has held out for us. It rained a bit while laying both floors but it never got too bad. We got 45 mins to discharge 7.5 cubic metres of concrete and did it in 40 mins but he took 15 mins to wash out his tank while on site so they are trying to charge us extra time :shake:

Two tankers unloaded by wheelbarrow, 85 square metres of floor laid on 2 levels and floated plus a nice large area of smooth concrete outside the garage door so the stones don't get dragged in on the slicks. Successful morning i'd say :smthumbup. All I need now is to build the walls, roof, wiring, line the inside, fit windows, doors and cut through one wall to form a new door opening. I bought a neat tool called a cut & break saw for cutting through the 9" wall. It cuts with 2 parallel discs then the centre is broken away so the next cut can go deeper and so on, right up to 400mm depth. Nice bit of kit :)

Here's some photos of the new carbon rear bumper as promised. I still have to make it fit the car and sand off the mould join marks on the rear but it won't slot into the old grp side pods hence why i'm having to make the side pods in carbon now rather than wait until later in the year ;)

Lots going on just now! Happy we got the floors poured as we can start on building the walls soon. I'm building this extension myself as i don't have the money to pay someone else to do it :)

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Good work with the concrete. What you need is a flat floor set up for a X then I'd come and do the walls for you!

This is the "toy" you want for cutting through the walls, we've been doing 18" solid (engineering) brick walls, in one pass ;):smthumbup
Nice thing is you can cut square holes as well so no trimming out in the corners or loose seatings for the lintels

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now thats lovely, and would look great on the back of my evo:lol:

Yea so far the weather has held out for us. It rained a bit while laying both floors but it never got too bad. We got 45 mins to discharge 7.5 cubic metres of concrete and did it in 40 mins but he took 15 mins to wash out his tank while on site so they are trying to charge us extra time :shake:

Two tankers unloaded by wheelbarrow, 85 square metres of floor laid on 2 levels and floated plus a nice large area of smooth concrete outside the garage door so the stones don't get dragged in on the slicks. Successful morning i'd say :smthumbup. All I need now is to build the walls, roof, wiring, line the inside, fit windows, doors and cut through one wall to form a new door opening. I bought a neat tool called a cut & break saw for cutting through the 9" wall. It cuts with 2 parallel discs then the centre is broken away so the next cut can go deeper and so on, right up to 400mm depth. Nice bit of kit :)

Here's some photos of the new carbon rear bumper as promised. I still have to make it fit the car and sand off the mould join marks on the rear but it won't slot into the old grp side pods hence why i'm having to make the side pods in carbon now rather than wait until later in the year ;)

Lots going on just now! Happy we got the floors poured as we can start on building the walls soon. I'm building this extension myself as i don't have the money to pay someone else to do it :)
Good work with the concrete. What you need is a flat floor set up for a X then I'd come and do the walls for you!

This is the "toy" you want for cutting through the walls, we've been doing 18" solid (engineering) brick walls, in one pass ;):smthumbup
Nice thing is you can cut square holes as well so no trimming out in the corners or loose seatings for the lintels

I tried to hire one of those diamond chainsaws but kept being told they were too dangerous to hire out :lol:. I got a price for a company to come in and cut the door opening at £1200 so I bought the Husqvarna saw and cut it myself for a fraction of that price. I should get back what I paid for the saw too :smthumbup
I tried to hire one of those diamond chainsaws but kept being told they were too dangerous to hire out :lol:. I got a price for a company to come in and cut the door opening at £1200 so I bought the Husqvarna saw and cut it myself for a fraction of that price. I should get back what I paid for the saw too :smthumbup
Apart from the fact it's a Yank engine and it uses twice as much oil in the 2 stroke mix, so makes your eyes smart in a confined space, I wouldn't say they are as dangerous as a standard chainsaw.
They are quick, but the only downside is, if you get it wrong or don't have enough water pressure it can be quite costly :smthumbup
That rear bumper looks stunning. Awesome work Donald.

Jon.
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now thats lovely, and would look great on the back of my evo:lol:
WHAT?????:eek::eek::eek:
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