top

Alfa Romeo GT Junior Racer

Post new topic Reply to topic trackscotland.co.uk Forum Index | Projects Goto page Previous  1, 2, 3 ... , 10, 11, 12  Next   Page 11 of 12

Thu Feb 11, 2016 8:09 pm PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Not for this year but next year I plan to do one of the Spa 6hrs support races.
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Wed Mar 23, 2016 5:44 pm PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Well we're now just over a week from the season opener. I'm getting a tuition session on the 1st and then racing on the 3rd.

Jobs to do on the car are;

Fix tacho.
Had an issue with the Stack tacho. Spoke to them and they gave me a reset process which appears to have it reading ok again but the dial sweep at the start is gone and the needle tries to go the wrong way. Quite odd. Anyway it's working it seems so I'm happy it'll do for the moment.

Wire up remote camera switch.
I was getting tired of having to remember to charge camera batteries and then remember to switch the camera on and off each race before fitting my harnesses.
Well I was told of a good system. Basically it's a knockoff GoPro called an SJ4000 (I think) which has a dash cam operating system. That means we can set the camera up to begin recording the moment it is powered. This way it is hard wired to the car and powered by the car systems. All I need to do is flick the switch on my dash. However before that all I need to do is wire the damn thing!

Refit my vinyls and new bootlid badge.
I had some paint done on the car so stripped the badges and vinyls off. They all need redone. In the interests of lightness I've chosen to have a chrome vinyl made of the GT 1600 Junior badge. I'm rather pleased with the finished article. Will post pics once done.

Bleed brakes.
Pedal felt long after last driving. I had new rear lines made for the car when the new rear axle went in so I suspect the guys bled the brakes with the handbrake on and as its part of the hydraulic system too when it's off it means the pedal feels long.

Fit door check straps and replace door hinge bolts.
Pretty much what it says. Doors are annoying as they're quite light which means I can't get out of the car without the driver's door trying to swing closed on me. I want to get these fitted!!!

So that's about it. Well almost. Richard will hate this as I know his feelings on polishing a race car but it was looking so clean that I wanted to protect it. I also had my detailer chap seal the paint with a ceramic coating and get the swirls out of the poly Windows as they were getting annoying. I think it's looking pretty decent!!








And here's a shot showing the before and after for the rear window. Right is before, left is after.





_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Thu Mar 24, 2016 9:24 am PostPost subject:
alistairolsen
established user


Joined: 16 Nov 2007
Posts: 715

Reply with quote

Looks awesome James! Good luck this season!
Back to top
View user's profile Send private message
 
Thu Mar 24, 2016 5:09 pm PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Thanks Ali!
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Fri Mar 25, 2016 2:10 pm PostPost subject:
Ciprian
user


Joined: 29 Aug 2013
Posts: 99
Location: Aberdeen

Reply with quote

She looks awesome James, good luck next weekend! Cip
_________________
2013 SMRC Formula Ford 1600
2014 Walter Hayes Trophy, Silverstone
Doune Hillclimb, Mallock MK32/34b
2015 Doune Hillclimb, Mallock MK32/34b
SMRC Classic Saloons, Alfa Giulia Super

https://www.facebook.com/CNRacingFF1600
Back to top
View user's profile Send private message
 
Fri Mar 25, 2016 6:57 pm PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Cheers Cip.

You racing too? G mentioned you may look to do some full FIA stuff with the car?
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Fri Mar 25, 2016 8:58 pm PostPost subject:
Ciprian
user


Joined: 29 Aug 2013
Posts: 99
Location: Aberdeen

Reply with quote

Wont make the April meet, but aiming to do the May/June, warming up for Silverstone Classic. I was aiming for Donington Historic but I'm on hols. U2TC is soooo expensive compared to KH, wow!, but I wanna do Silverstone and hopefully another away round after.
_________________
2013 SMRC Formula Ford 1600
2014 Walter Hayes Trophy, Silverstone
Doune Hillclimb, Mallock MK32/34b
2015 Doune Hillclimb, Mallock MK32/34b
SMRC Classic Saloons, Alfa Giulia Super

https://www.facebook.com/CNRacingFF1600
Back to top
View user's profile Send private message
 
Sat Mar 26, 2016 10:05 am PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Shame you won't be out this time but that may be for the best looking at the forecast!!

I have heard U2TC is a rich boys playground where the top cars are run with limitless budgets so I can imagine the series attracts some livelier entry fees.

All the best with it though. I may try to make a trip down to watch you in some events.
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Mon Jul 04, 2016 8:41 am PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

What a weekend!

Was racing in the SMRC away round at Donington. First time racing away from home and Iím now wondering why I didnít do it sooner!! What an experience.

I was testing on the Friday and got on well. The guy who runs Racetech (a motorsport company in the UK) came to the circuit and was doing some coaching for me. It helped massively on the uptake! Started out in the 2.09ís (it was the GP circuit we were on) and the best of the best are doing 1.55ís. Some time to make up!! By the end of testing it was down to 2.04 dead. I qualified on the Sat morning with a 2.00 so I was really pleased. Jimmy Crow in the white Escort is usually doing 59/60ís round KH where Iím doing 63ís so thereís usually a fair difference. Here though he qualified at high 1.57 so I wasnít too far off the pace especially as the circuit is 2.5 miles.

We were really lucky that quali and both races were dry and warm.

Race 1 I got into a groove pretty early on. There were only 3 of us in my class; Jimmy in the Escort, Jim in the Elan and me in the Alfa. The Elan isnít a regular so I had no idea how quick he would be but we were very evenly matched. Jimmy ran away with the class win, heís got something like 240bhp in the Escort and very similar weight so Iím not catching him anytime soon. The Elan was much closer and I really thought I could get him but as my tyres became slidier I found it harder to keep up. My best lap was a low 1.58 but my data logger tells me that if I hooked up all my best sectors Iíd have been a low 1.57! I need to improve my consistency between laps now.

Video here:

https://youtu.be/sGkYbGZZpBY

Race 2 was also very enjoyable. Got into a battle with the Capris. Both are running Cologne V6ís so plenty of power but I think I kept up in the twistier sections. Sadly I spotted the water temp rocket so decided to back off for the last couple of laps to bring it back under control. Thatís getting looked at this week as the car is staying down in England with Alfaholics as Dad and I are at a trackday at Goodwood in 2 weeks.

Video here:

https://youtu.be/tSrj_mLvcR8
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Mon Jul 04, 2016 9:30 am PostPost subject:
andybell
established user


Joined: 16 May 2013
Posts: 1236

Reply with quote

great stuff man its really fun to do other circuits Smile
_________________
http://www.youtube.com/user/andybalcairn/ to see how bad I drive!!!
Back to top
View user's profile Send private message
 
Mon Jul 04, 2016 10:24 am PostPost subject:
AK
Site Admin


Joined: 27 Nov 2006
Posts: 19727
Location: Aberdeen

Reply with quote

Yup, away rounds are great Laughing

I still havent raced at one with SMRC yet but just being there is good too Laughing
_________________
Impreza Race Car - SLS/SMRC
Mini Race Car - SMRC
911 - 1981 Air Cooled 3.0
500 - 1969 Fiat 500 L
Toureg 262 RLine
Track Scotland
Back to top
View user's profile Send private message
 
Tue Jul 05, 2016 7:36 pm PostPost subject:
Ciprian
user


Joined: 29 Aug 2013
Posts: 99
Location: Aberdeen

Reply with quote

Well done James, I watched the videos, looking good, your car is stunning as usual!
_________________
2013 SMRC Formula Ford 1600
2014 Walter Hayes Trophy, Silverstone
Doune Hillclimb, Mallock MK32/34b
2015 Doune Hillclimb, Mallock MK32/34b
SMRC Classic Saloons, Alfa Giulia Super

https://www.facebook.com/CNRacingFF1600
Back to top
View user's profile Send private message
 
Wed Jul 20, 2016 12:16 pm PostPost subject:
James B
established user


Joined: 24 Apr 2009
Posts: 1382
Location: Aberdeen

Reply with quote

Following the Donington race weekend the car went to Alfaholics for a health check and some work to be carried out on a few areas I wasnít totally happy with.

The job list started as;

ē Clutch release bearing noisy. Check clutch thickness while there.

ē Evidence of oil residue from bellhousing joint back. Check for source.

ē Brake pedal. The brakes were phenomenal all weekend but the travel is still quite long and pedal is quite far back. Adjustment required.

ē Thermostat for cooling fan. The car began to overhead badly in the second race when I was pushing hard. I needed to back off and slow down to avoid damaging anything. I think the fitment of an auto 'on' for the fan at a certain temp would certainly help.

ē High speed vibration. I noticed on the straight that above 90mph there is a really noticeable vibration from the rear of the car.

I got daily updates on the findings and each day my wallet groaned! Haha!

First up, the clutch.
They pulled the box and clutch cover and found this;



Two issues there. The plate itself was cracking due to stress and its clear that not all of the clutch friction material was interfacing with the flywheel. The flywheel was showing signs of hotspots and wear too.
I think the flywheel was the original one but machined for lightness.
I could have just stuck a new clutch plate in there and hoped but the only sensible, proper, solution was to change the clutch and flywheel entirely. It just so happens that Alfaholics do a lovely lightweight race flywheel with balancers in there to limit/dial out vibration on the crank. That and the new clutch were both sent away for balancing and then fitted to the car.

With the box off the rear crank seal was visible and it was clearly the source of the oil I was seeing. That got replaced.



The vibration I was feeling was identified too. It appears that the car was using a non-original gearbox mount that was too solid. This then lead to vibration and the vibration then began backing off some of the bolts in the drive assembly which would have been a big problem. Thankfully the replacement of a relatively cheap part seems to have resolved that issue.

However, it may have been the cause of some other issuesÖ.This was found;









It could have been re-welded but I think that was going to be a messy fix and not Ďrightí so a fresh manifold was fitted. The old manifold was original to the car when I got it and the plates tying the pipes together look a little aftermarket. I there was evidence of previous welding to the manifold too so I suspect the previous owner found some cracking issues too and tried a fix.

The brake pedal was adjusted and is now absolutely perfect. Nice upright pedal with a solid feel. However, while in that area it was noted that the throttle was very light and too imprecise. A quick linkage check showed this;



Thereís meant to be a solid rubber bush in there but itís perished. Alfaholics fit a solid aluminium bush in there on racecars so thatís what theyíve done to mine. At the same time they noted that the return spring on the throttle was ineffective so thatís been replaced too.

At the same time there were other bushes noted as being worn so they were changed out and the car got a general healthcheck and all was well. A lot of work done but hopefully future proofing the car for hard race use for some time.

Then on Saturday I attended the Classic Alfa trackday at Goodwood. It was a brilliantly run event absolutely full of wonderful Alfas of varying vintage but there was overwhelmingly strong attendance by 105ís; many in trackday/race guise so I didnít feel too out of place.

The day was a scorcher. Our hire car was showing 28 degrees in the shade. My car isnít known for its cooling aids so I was anticipating some very hot sessions behind the wheel!

It was my first drive at Goodwood and I wasnít left disappointed! What a circuit. Really really quick. Coming from Donington only two weeks beforehand I was prepared for a quick circuit but it was still a huge amount of fun experiencing it. I was nearing the top of 5th gear so will have been fairly motoring on! Still to pull the data from the datalogger but will do soon. Hopefully I also have footage from my gopro but it wasnít playing ball last time out so I canít guarantee. Iíll check tonight.

I got 4 sessions of about 7/8 laps in. The clutch felt really good and strong. Thereís absolutely less vibration in general and the vibration I felt at Donington is gone completely.
The brake pedal change is a huge improvement. Itís much more confidence inspiring and I now have the option to heel and toe should I wish to learn!
The throttle too, is a vast improvement. The result is that I have a very solid pedal with plenty of room for throttle control and as itís a strong push required now I can actually modulate the throttle through the corners where before it was on or off really. Very pleased with the result here!
The engine also feels a bit stronger. It may be that the throttle input is much quicker and direct because the play has been removed from the assembly and I may not even have been getting full throttle before. The manifold too will have made some difference.

I did struggle slightly with noise restrictions at Goodwood. Through St Marys I set off the noise alert on my first session so from there on I backed off at that point and all was fine noise-wise.

However all wasnít perfect. My father was sharing the drives with me and on his first session after lunch he was getting quicker and quicker when suddenly the brake pedal went to the floor in a braking zone. Thankfully a couple of well-timed downshifts brought the car down in speed and he was able to limp it home to the pits but on arrival in the pitlane a small fire began in the wheel around the brake area. It extinguished itself and no damage was evident but we called it a day at that. Touching the brake pedal led to fluid pouring out so we knew there was a significant leak. We actually only lost about 45min of running as the car was being collected at 3ish as we had flights booked home to Aberdeen.

Anyway, I got the car back on Monday and last night had a chance to pull the wheel off and see what had happened.

Initially I had suspected that the brake line had backed off and leaked at the connection into the caliper but it was fine. The disc was looking a little odd thoughÖ.



Yes, it looks like the surface of the disc is delaminating on the inside face





Wheel off now and the outer face is visible. This doesnít look right;









There has clearly been some huge heat generated at some point. I am wondering though if the damage to the rubber bump stop and the axle strap was from the fire rather than melting from heat;





By the looks of things, from the outer edge of the disc in this pic, the heat was generated from the outer face of the disc;



This would also support that as the outer caliper piston is Ďwetí which indicates there was an issue at that side;



Pulled the caliper off and the pads tell the same story of heat;







And finally the pics of the pistons in the caliper;





Its quite clear than the leak is from the outside caliper piston as the inside one is dry. Both have experienced major heat though. The caliper, pads and disc are away for an inspection and rebuild if necessary to hopefully resolve the issue!
_________________
Alfa Romeo GT Junior
Back to top
View user's profile Send private message Visit poster's website
 
Wed Jul 20, 2016 12:58 pm PostPost subject:
AK
Site Admin


Joined: 27 Nov 2006
Posts: 19727
Location: Aberdeen

Reply with quote

Cant see the pics... must be my daft conencton offshore, but quite interested to see them.

Sounds an eventful few weeks, and never a nice feeling to lose brakes, or have a fire. Both at one must have been a bit :O Saving grace was fire in pits though!

piston jammed on one caliper side.... heat generated... seals melted... fluid leak... nae brakes.
_________________
Impreza Race Car - SLS/SMRC
Mini Race Car - SMRC
911 - 1981 Air Cooled 3.0
500 - 1969 Fiat 500 L
Toureg 262 RLine
Track Scotland
Back to top
View user's profile Send private message
 
Wed Jul 20, 2016 1:21 pm PostPost subject:
andybell
established user


Joined: 16 May 2013
Posts: 1236

Reply with quote

losing brakes *grumble* seems to be a theme recently :p
_________________
http://www.youtube.com/user/andybalcairn/ to see how bad I drive!!!
Back to top
View user's profile Send private message
 
Post new topic Reply to topic trackscotland.co.uk Forum Index | Projects Goto page Previous  1, 2, 3 ... , 10, 11, 12  Next   Page 11 of 12

View previous topic
View next topic
Display posts from previous:   




You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum