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Old 02-04-2010, 20:52   #1
Madmac
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Madmac Motorsport's Twincharged Evo 5

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

I've also designed and built a tubular front subframe and arms (total 9Kg) 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. 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.

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


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 Should be fun!

Keep watching....
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 02-04-2010, 20:58   #2
leecavturbo
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brilliant mac
where is it hiding ?

Last edited by leecavturbo; 02-04-2010 at 21:01..
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Old 02-04-2010, 21:02   #3
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very nice work donald.which charger did you opt for?im assuming it would be similar to a rotrex given the space constraints.
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Old 02-04-2010, 21:04   #4
neverneverman
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brilliant mac
where is it hiding ?
Tucked away!

Looks spot on Donald, looking forward to having a proper look at it at Doune
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Old 02-04-2010, 21:08   #5
Madmac
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Lee, she'll be out of hiding soon enough

As this has been a lot of time and planning. Can't go giving out secrets like that! I need to keep the advantage over the competition for as long as possible
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"Understeer" is when you hit the fence with the front of the car. "Oversteer" is when you hit the fence with the rear of the car. "Horsepower" is how fast you hit the fence. "Torque" is how far you take the fence with you.
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Old 02-04-2010, 22:35   #6
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Excellent, looking forward to seeing more pics of the setup
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Old 03-04-2010, 07:08   #7
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Brutal!
Looking forward to seeing more!
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Old 03-04-2010, 07:16   #8
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Sounds good Donald, look forward to see this in action, good luck with it.

Well done all at Wallace performance for building/mapping some serious cars over the past few years.
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Old 03-04-2010, 08:21   #9
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Sounds like it should be Fantastic m8

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Old 03-04-2010, 09:01   #10
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I remember seeing you at Wallace Performance, a few months back now....
The car looks great,and sounds like it will be real SLAG!
Well done Donald, for all the hard work mate!
It has obviously payed off!
The boys at Wallace are very helpfull, good bunch of lads!

Andy
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Old 03-04-2010, 10:12   #11
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Well done Donald and all the best for the hill championship and looking forward for some videos.

Jon.
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Old 03-04-2010, 10:19   #12
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Good stuff Donald, pushing the boundaries mate. Be good to see what the power delivery is like when you've got it all fettled and happy with it.
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Old 03-04-2010, 10:35   #13
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Sounds good Donald, look forward to see this in action, good luck with it.

Well done all at Wallace performance for building/mapping some serious cars over the past few years.
+1
You are a clever guy,Donald,hats off to you
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Old 03-04-2010, 10:36   #14
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Catch him if you can boys

Good luck this season Donald!
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Old 03-04-2010, 10:45   #15
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Awesome mate.

You really have been pushing the boundaries with this car, flat floor... fuel cooler... revised wing designs... now this great stuff.
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