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Author dewismotorsport's supercharged Astra coupe 2.2 race car build
Jed D
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Registered: 15th Mar 11
Location: Durham
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16th Feb 15 at 21:19   View User's Profile U2U Member Reply With Quote

awaiting awesome update
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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16th Feb 15 at 22:10   View User's Profile U2U Member Reply With Quote

Cool stuff adam
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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17th Feb 15 at 19:08   View User's Profile U2U Member Reply With Quote

Well spent the day at courtenay sport on Monday, 11am till 4pm ish to get the map finished off. First run made 246bhp and 209ftlbs but was lean in places so began the email table tennis between Courtenay and Klassen in Germany until four tweeks later it was done 242bhp & 205ftlbs was mapped without the supertrap on so we checked it with it on and it improved the boost map in places due the the slight bit of extra back pressure. I've reduced the plates down to 12.



Few videos from the day
http://youtu.be/ECZC9i6QFE0

http://youtu.be/OMuMUwfi-F8
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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17th Feb 15 at 19:34   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Nic Barnes
Cool stuff adam


Cheers mate

And thanks Jed
davegreen
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Registered: 20th May 12
Location: Oxfordshire
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17th Feb 15 at 22:34   View Garage View User's Profile U2U Member Reply With Quote

nice one, good starting point. now time to enjoy it!
Jed D
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Registered: 15th Mar 11
Location: Durham
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17th Feb 15 at 22:52   View User's Profile U2U Member Reply With Quote

Need the vid up too mate, <3 that sound
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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18th Feb 15 at 10:16   View User's Profile U2U Member Reply With Quote

Cheers Dave, yeah will keep it safe on track which is much prefer than outright power.

Videos are up above Jed
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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18th Feb 15 at 10:16   View User's Profile U2U Member Reply With Quote

Got myself another cooling module, loom and GM CTS to try and cure my fan issue. Also bought some Han's device posts for my helmet and alap got a black one piece facia to replace my silver one


Also got myself a supercharger rebuild kit, just need to find some needle bearings in the UK as ZZP in USA have very steep postage costs
Jed D
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Registered: 15th Mar 11
Location: Durham
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20th Feb 15 at 10:09   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by dewismotorsport

Videos are up above Jed


ahh yes, sorry, didnt see them there
Simon_16v
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Registered: 14th Aug 06
Location: Yorkshire
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20th Feb 15 at 12:20   View User's Profile U2U Member Reply With Quote

Looks good, but what is this super trap?
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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20th Feb 15 at 13:17   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Simon_16v
Looks good, but what is this super trap?


It's a bolt on or weld on additional tuneable silencer, mainly used on track cars to reduce decibel levels, I have it on as I don't like really loud exhausts so use it to keep the noise down.
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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23rd Feb 15 at 21:49   View User's Profile U2U Member Reply With Quote

Been doing some improvement mods, first up was the oil cap breather mod, they have a built in breather but I drilled it out to 13mm on bottom and 8mm on back, can blow though it a lot easier than standard



Then got rid of the crap silicone pipe for the brake vacuum, silicone can collapse under vacuum so modified the standard Astra one


And modified the vectra c intake pipe, had to make a few cuts and holes as bonnet catches hit it and tank vent valve now has to run through it and back to throttle bodie, quick blast with the airline and it works well and doesn't really blow out of the holes due to the flow nature of the pipe which is a bonus


dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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25th Feb 15 at 08:27   View User's Profile U2U Member Reply With Quote

More work done getting it ready for its trackday at bedford on Saturday, removed the tow bar and electrics as I haven't towed anything in years, 28kgs in total so a good weight saving. I then got round to making a new spring retainer as the last one had some how rusted out just on the drivers side


I then fitted the 270lb 2 1/4"id coilover springs onto the beam as I wanted a stiffer rear spring set up. Also fitted the white line rarb.


After a test drive car felt much more connected with noticeably less body roll.
I also topped up gearbox fluid, fitted the new CTS and cooling module but they haven't cured my cooling fan staying on issue so the search continues for answers to that, I will try the loom at some point but feel it may be something loom back to car?!
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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25th Feb 15 at 21:27   View User's Profile U2U Member Reply With Quote

Final bit of track prep today, stripped all the crap out the inside


Final bit of weight saving


Fitted the wet wheels and tracked it up, I've set it at 0.5mm toe out and -3 degrees camber

random dav
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Registered: 7th Jan 04
Location: NSW
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26th Feb 15 at 05:37   View Garage View User's Profile U2U Member Reply With Quote

Did you put the new bends in the servo pipe? If so, how? Just heat it up?


WRLFC !

Project cars
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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26th Feb 15 at 18:30   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by random dav
Did you put the new bends in the servo pipe? If so, how? Just heat it up?


I haven't added any extra bends but you can hear it and bend it but just be careful not to pinch it
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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26th Feb 15 at 18:30   View User's Profile U2U Member Reply With Quote

Final mod before the trackday was to change the silver facia, never liked it as it didn't match anything, i've swapped the radio and gauge holder holes as when the gauges were lower it was hard to see as they weren't anywhere near eye level, so now their higher it's a bit better.
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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3rd Mar 15 at 12:25   View User's Profile U2U Member Reply With Quote

Well Bedford was a successful shakedown for the Astra, engine performed well but did keep getting very hot, temps would quickly get up to 95-98 degrees, first lap generally a tyre and brake warm up, then probably 4-6 hot laps then a cool down lap. On the last session I got the power cut kick in and it drove rubbish so straight for a cool down lap.

Plan is to remove aircon as tbh I don't use it, and hole saw the bumper and crash bar behind the number plate which will allow much needed air flow to radiator as currently the only air flow is through the bumper grill via the charge cooler and aircon rad.

Handling was much improved but some Gaz gold coilovers will be getting purchased soon as current dampers are too soft.



And a couple of videos:
http://youtu.be/c809orgUNtw

This one is verses a mate in his C20LET Astra. Power cut happens right at the end.
http://youtu.be/O2IqmkxbExc
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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15th Mar 15 at 08:59   View User's Profile U2U Member Reply With Quote

Bedford SEN circuit 28/2/15







AlexW
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Registered: 25th Oct 08
Location: Essex
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15th Mar 15 at 17:08   View User's Profile U2U Member Reply With Quote

didn't realise that was you at Bedford.
I spent most of the day passengering that Yellow Clio in the back ground.

Astra is looking awesome and doing well
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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15th Mar 15 at 20:47   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by AlexW
didn't realise that was you at Bedford.
I spent most of the day passengering that Yellow Clio in the back ground.

Astra is looking awesome and doing well


Ah right, was a few decent paced vauxhalls there showing up the clio boys
AlexW
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Registered: 25th Oct 08
Location: Essex
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16th Mar 15 at 19:24   View User's Profile U2U Member Reply With Quote

Certainly was lol
Mind that, I can't think of any properly fast Clios there lol
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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16th Mar 15 at 19:48   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by AlexW
Certainly was lol
Mind that, I can't think of any properly fast Clios there lol


Only really quick one was the my mate Dan's grey phase 1 with the 1.8 20v in it pushing 350bhp
AlexW
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Registered: 25th Oct 08
Location: Essex
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16th Mar 15 at 20:56   View User's Profile U2U Member Reply With Quote

Yeah I went out with Dan, Clutch was slipping most of the day and it was the first trackday with that engine etc.

I had forgotten about that despite me going out in it lol
dewismotorsport
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Registered: 16th Feb 08
Location: Coventry & Poole
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18th Mar 15 at 19:48   View User's Profile U2U Member Reply With Quote

Yeah shame about that but he was still happy it didn't blow up so classed it as a success lmao

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