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Madmac Motorsport's Twincharged Evo 5

598103 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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Your mad Donald! :lol:
Nice quick spool up and more bhp lower down? :mhihi:
Well done,

Nice to see you back on here too Tony :thumbup:
You need to fit a ice maker Donald ;-)
Maybe a soda machine in the back seat incase you get thirsty :)

Keep up the good work.
Just stay in A3 Martin :lol:
Its bad enough having 1 unbeatable EVO :D

Only joking! Well done to you both! very quick times.
Roll on next year :thumbup:
Like the wrap Donald :)
When will i drop my car off ;-)
Cheers. well chuffed with the weekend :lol:

Didn't get the launch, wet run - 2nd overall:
Would be happy with that run in the dry!!

Well done Donald :thumbup:

Do you ever sleep? :lol:
Good stuff Donald ;-)

Was there much cars in B3 and was the entry full?

I never made it up this weekend.

You going for FTD soon? :)
Looking good Donald! Handling very well too. Shame about the misfire.

Sent from my GT-I9300 using Tapatalk
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Well done Donald for a other class record today and getting into the top 10 run offs :)
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