Another great result Donald, well done :smthumbup it's really starting to come together.
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 :angel:
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:smthumbup. 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
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....
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
) 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
. 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
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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1701 - 1720 of 2422 Posts
Yea now that the boost issue is fixed she's back on song again. It was one of the wastegate diaphragms leaking.Another great result Donald, well done :smthumbup it's really starting to come together.
Better late than never, here's Sunday's run 28.38 in-car video. A few spots of rain on the start line but it never came to anything:
Just a wee update on progress.
The new Samsonas sequential gearbox has arrived back and is now 'mostly' installed. The linkage fouled the supercharger so some major surgery was needed to allow it to clear the manifolds. That's all done and we're working on wiring up the strain gauge over the next couple of days. Hoping all is good as we're cutting it fine for Doune this weekend, the last event of the year on our calender.
I'll update once i've had her out for a test drive
The new Samsonas sequential gearbox has arrived back and is now 'mostly' installed. The linkage fouled the supercharger so some major surgery was needed to allow it to clear the manifolds. That's all done and we're working on wiring up the strain gauge over the next couple of days. Hoping all is good as we're cutting it fine for Doune this weekend, the last event of the year on our calender.
I'll update once i've had her out for a test drive
So far so good
I haven't had her out yet but 'driven' her on the ramp to check selection and gear cut operation. All seems okay.
I hope to get out driving tonight and check the box under load. It seems due to time constraints i'll be going to Doune with a largely untested system though. There will be some messing about with the gearchange setup no doubt.
I haven't had her out yet but 'driven' her on the ramp to check selection and gear cut operation. All seems okay.
I hope to get out driving tonight and check the box under load. It seems due to time constraints i'll be going to Doune with a largely untested system though. There will be some messing about with the gearchange setup no doubt.
Back from Doune with a complete car
Sat & Sun both dry so that's 3 dry Dounes this year. The new Samsonas sequential box is in and flatshift working well. I hadn't tested it at all so it was a leap of faith launching off the line on Saturday morning! Started out on a 48s opener getting down into the low 46's by the end of Sat practice.
Sunday started on a 48s damp/cold track then T1 i got within 0.01s of the record 45.14s! T2 secured a new class record with a 44.93s fairly committed run
I only seem to have Timed competition run 1 - 45.14s run on video unfortunately :wallbang:
The gearbox is working great, nice and smooth, absolutely no problems at all. I managed to get the changes down to 0.060s reliably. I spoke to a gent over the weekend who is working on a new affordable paddle shift system for sequential boxes so Tiddles may be become the guinea pig test and development tool over the winter and next year
No other issues at all, again another reliable event and Tiddles came home in one piece :angel:
I'll post up the video in an hour or so
That could be all for this year. I'm going to try to get an entry for Loton Park Hillclimb next weekend but I suspect there's little chance of that as it's usually over subscribed. I may take her up to Boyndie Sprint instead and get rid of the remains of the Avons and have a no-pressure weekend of fun if I'm not going to Loton Park
Sat & Sun both dry so that's 3 dry Dounes this year. The new Samsonas sequential box is in and flatshift working well. I hadn't tested it at all so it was a leap of faith launching off the line on Saturday morning! Started out on a 48s opener getting down into the low 46's by the end of Sat practice.
Sunday started on a 48s damp/cold track then T1 i got within 0.01s of the record 45.14s! T2 secured a new class record with a 44.93s fairly committed run
I only seem to have Timed competition run 1 - 45.14s run on video unfortunately :wallbang:
The gearbox is working great, nice and smooth, absolutely no problems at all. I managed to get the changes down to 0.060s reliably. I spoke to a gent over the weekend who is working on a new affordable paddle shift system for sequential boxes so Tiddles may be become the guinea pig test and development tool over the winter and next year
No other issues at all, again another reliable event and Tiddles came home in one piece :angel:
I'll post up the video in an hour or so
That could be all for this year. I'm going to try to get an entry for Loton Park Hillclimb next weekend but I suspect there's little chance of that as it's usually over subscribed. I may take her up to Boyndie Sprint instead and get rid of the remains of the Avons and have a no-pressure weekend of fun if I'm not going to Loton Park
It sure is, just incredible how quick the power is there on throttle. We reckon we can go bigger on the tubby and keep it spinning using the supercharger so that's the next development phase. It's the direction tiddles has gone for years, a focused purpose-built hill climb weapon developed for getting from one point to another in the shortest time possible. This means thinking outside the box and trying things, however barmy or seemingly worthless those ideas might be
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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Chris, we have entries for both days at Boyndie so GAME ON!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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Email Janet with car details and take the forms with you on Saturday :smthumbup
1701 - 1720 of 2422 Posts
