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Madmac Motorsport's Twincharged Evo 5

597983 Views 2421 Replies 217 Participants Last post by  Madmac
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.

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

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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renewed the insurance - £450 fully comp - all mods declared :smthumbup
u serious??

thats a pi55 take, but then it pays to be old :D :D

and seen the vids from the weekend, looks like its getting quicker, and less coal smoke :mhihi: still need a shot tho :smthumbup
You could have borrowed mine as its sitting on the windscreen gathering dust just now but you never asked :cry:
not a problem donald, needless to say i didnt make it to work at 7 this morning after only 5 hours sleep!! just made it in time for 8 tho :D
I'll give you some silicone connector grease and a tie wrap to hold that drenth connector plug together properly!!
typical!! the one time i cant go to a sprint and you are offering passenger rides :wallbang:
If you hadn't been such a chicken you could have got into the 50's like you wanted :D:D:naughty::moon::moon::utahere::utahere:
So that's why my tyres have no tread on them! I also see what you mean by they didn't fill the arches! Sounding good to!
Sounds like you are have more fun than us up here at boyndie, I think a ice rink has more grip than this track!
Well done, if you are entering boyndie let me know and I'll take the seats out and enter b3 as competition for you ;)

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I reckon those slicks would find me those missing 6 seconds :/

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That must be about mk4 on the bracket!

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