Classic Alfa Forums

The car went to the rolling road today for testing and tuning. It was running beautifully by the end.
The power is available from 7000rpm and peaks at 8000rpm.

https://vimeo.com/180762317

All the best,
Simon

Nice one Simon, did you get a good output?
Thanks for sharing.

Hi Keith,
The output is interesting to say the least: The tester described his dyno as the "heart breaker". He says it is very accurate but you can get a result that is more than 20bhp higher on another dyno?

I wondered if it was at the wheels but the figure of 117 would be far too high?

Anyway, it's running beautifully so let's see how I do at Snetterton.

Brgds
Simon

Thats a good figure I would have thought Simon, I know she is far from standard but still 1300 cc.
I am going to try and get over.
Can't miss a chance to see so many suds on the track.

Hi Keith,

I have some official docs with the car that state 146bhp at 8400rpm I think.
146 always seemed awfully high and so it seems.
Still kept up with the SC at Rockingham which has a rolling road figure of 157.5bhp at the flywheel?

I think we need to use the same rolling road to compare apples with apples.

Anyway, I am going to have a lot of fun at Snetterton with it running so well. Also, with 15 litres of fuel onboard the car will be about about 35KG lighter overall.

Really looking forward to seeing Ted in action sorting out the faster cars.

All the best,
Simon

I wouldn't worry about the figures, it picked up well in the vid.

8400rpm.....

Hi Tim,

Are you coming out to play at Snetterton or Silverstone?
We have been missing you.

Brgds,
Simon

Im planning to be at Silverstone, so hopefully you will all make it there also.

Hi Tim,
I will definitely be there. Looking forward to it.

All the best,
Simon

This is the current state of play but also trying to be thought provoking and promote discussion.
Brgds
Simon

That's with you in the car...?

Correct. 117 bhp and 914.5 Kg with me sat in the seat.

Brgds
Simon

Hi Guys,
A bit more weight loss today. I am putting Lexan side windows in but making sure it uses existing fittings and is reversible.
Here is the door glass: One Quarter light weighs 0.6kg
One Door window weighs 4.06kg
Rear window and frame weighs 3.54kg Total per side 8.2kg
Lexan window cut with a section on the bottom to replicate the glass window steel winder bracket: All Lexan in place: Lexan Quarter light weighs 0.35kg
Lexan door window weighs 1.96kg
Lexan rear window weighs 1.55kg
Lexan total per side of 3.86kg
Brgds
Simon

Ventilation
Brgds
Simon

Nice bit of weight saving .I will be going this route .but with a tinted plastic .forgot the name of the stuff .but shatter proof. Plus doing the same with the winder .

Hi Johnboy,

You probably know that Lexan is just a trade name for polycarbonate sheet and you can get it in bronze, grey etc. I opted for clear 5mm. Its incredibly tough.
We bought sheet to various pre-cut sizes to make windows for two Suds and the Golf Gti. Probably got enough for the Fiat 131 as well.
Just the rear window to do on the Trofeo now. Really happy with the weight savings. This is all old news to the many seasoned racers on here but all new to me.

Brgds,
Simon

Hi
Yeah theres a few names for poly . windows are a great weight saving area for sure. Coming to together

around 10kg saving is a great result, all high up weight too

Hi Simon,

This might be of interest,

I gave plastics for performance an old front screen from a sud to make a template
and purchased a lexan screen myself.

https://plastics4performance.com/

Liam

Hi Liam,

Thanks for that. It would be great but we have to keep the original windscreen under CTCRC rules.

Brgds,
Simon

Hi Guys,
I wanted the rear windows to open for ventilation and for the fitment of Lexan panes to be totally reversible. I made up some stainless brackets. These bolt up to the door pillar with rubber washers as per the original design to allow the window to hinge for opening.
Seems to have worked out well. All the best,
Simon

Looks good, what did you use to cut the lexan ?

Hi Tim,

I used Malcolms electric jigsaw with protective tape on the foot plate and a metal cutting blade. Tight corner radii finished on the bench grinder.

Brgds,
Simon

Rear window today. Bought a replacement rear window seal so decided to cut the existing one as I didn't want to risk breaking the glass getting it out. I think it is a series 2 seal?
I dressed the cut seal and put it back in.

Window placed on the Lexan sheet and mark round it with a scriber. Cut out the lexan window with a jigsaw and dress the corners with a dremel. The lexan window is half the weight - so a loss of 4kg. It's a 10min job to take the lexan window out now and fully reversible. Not water tight but the car is garaged apart from when racing. Bonnet and boot next.
Brgds
Simon

Boot replaced with a glass fibre one: Bonnet replaced with a glass fibre one: The car weighed 904kg with me in it and just residual fuel.
After windows, boot and bonnet the car now weighs 871kg with me in it and residual fuel.
The spoiler is still to be fitted and the boot and bonnet need painting so let's say 875kg.
Very happy with that.
Brgds
Simon

Very good, you will notice a difference I'm sure.

Hi Tim,
I have listed out the weight loss as follows.
Hope this is helpful to any racers out there.

Brgds
Simon

That's excellent, thanks.

Nicely presented Simon.
Very clear to see the improvements in weight loss.
Glass fibre panels look very nicely made.
Roll on next season.