Mongrel Street Racer

[Darren65]

Please accept in the benevolent spirit in which offered...

And much appreciated too Richard

I think Chris had his tongue firmly planted in his cheek when he told me the cold weather was making my fuel heavier after seeing my disappointment at the car not breaking the ton mark, but the after spending the day stood around the open freezing workshop at Center Gravity from 8:30AM until 7:00PM I can reliably confirm that Atherton yesterday was indeed as cold as the South Pole and therefore when I filled the tank it must have taken on a greater mass than in warm weather, hence the extra weight.....

....997.75kg it is then!

With regards to closing the thread I was actually forgetting the future rolling road session I intend to post........at that time no doubt the open trumpets and 5ft diameter industrial fan blowing air into the engine bay (for cooling of course!) will help demonstrate the Mongrel's 250 potent horses!

It's all about the numbers you know!

Cheers,

[inaglasshouse]

With regards to closing the thread I was actually forgetting the future rolling road session I intend to post........at that time no doubt the open trumpets and 5ft diameter industrial fan blowing air into the engine bay (for cooling of course!) will help demonstrate the Mongrel's 250 potent horses!

Yes, a cold day would be good for that one.
Tongue-in-cheek discussion / bragging about numbers aside, I'm sure it will be interesting to see how it's fuelling. Feels pretty good on the seat of pants dyno, by the sound of your recent adventures?
Hope to see this car soon.
Cheers, Richard.

[squirdan]

congrats Darren

OCD level of detail has resulted in a stupendously cool toy

well done... the level of energy needed to drive something like this project from start to finish is beyond most people's bandwidth or cashflow and hence compromises occur

well done mate on achieving the dream

[Darren65]

......the level of energy needed to drive something like this project from start to finish is beyond most people's bandwidth......

.....and you well know all about that!

Thanks for the comments Dan, good to see you're still lurking. Hope all's well. Must get the cars together when the good weather comes.

This project kinda went the other way when it came to compromise, this was meant to be a nice simple budget hotrod but I hit a slippery slope!

I don't have unlimited resources so each extra step has taken some soul searching but then I was lucky to have my 993 to sell and help fund the project, also lucky being in the motor trade, doing my own paint and also swapping paintwork for other services etc.........and then even luckier still to have a very understanding wife who lets me play!

Only regret is that the car wasn't finished at the beginning of summer......not that it'll stop me driving!

Cheers,

[Darren65]

So it really was that straight forward?

A shout out to Marek Lappock

A few people have asked if things went as smoothly as they appear and other than a little fettling and adjustments etc. the car has been great straight out of the box.

One issue that did rear its head and threaten to disrupt my inaugural drive out was a leaking fuel tank......I mentioned a bad smell of fuel when taking the car for its running-in service on the Friday before our Monday Welsh drive meet and this turned out to be fuel seeping through the centre seem. With no time for a proper fix I asked Gary to bodge a repair with epoxy putty so I could make the trip!

At 11:00PM later that evening after filling the tank with 100 litres of super plus I checked to see if all was well only to find fuel still seeping through the welds!.....I spent the next 4 hours sucking out fuel (literally!), jacking up the tank and cleaning back to bare metal to perform another bodged fix. Fortunately this time the repair held.

The tank came from Marek Lappock. Many will know Marek manufactures a number of early Porsche parts from trim, to lenses to tanks and much more in between. He supplies many of the Porsche specialists the world over that we all know as well as supplying Porsche directly.....you can reach him at early911parts@gmail.com

To be fair to Marek the 100L tank I'd purchased was one of five protypes he'd produced which were rushed to make ready for Essen 2014......production of these tanks seemed to have taken an age to get off the ground and fearing they may never see actual production I took a flying visit to Essen to pick one up at a bargain price.

When I informed Marek of my issues, even though it was a protype and no guarantees were given regarding quality, he instantly said he'd replace the tank and offered to try to find one that weekend from one of his UK distributors. Having bodged a repair I was happy to wait and this duely arrived this weekend totally free of charge complete with a centre fill already welded on ....



A big thank you to Marek for coming up trumps and being more than fair considering the background. He's a sound guy

If anyone is interested I'll carry out a proper repair to the old 100L tank and sell this at a bargain price to try and help Marek recover his costs.

Cheers,

[Jonny Hart]

Darren, have you got any clear protection film on your car, particularly on the sills?

3500 miles on fresh paint and mine is peppered back to primer all round the jacking point and along the sill and up in front of the rear wheelarch.

[Darren65]

Darren, have you got any clear protection film on your car, particularly on the sills?

No nothing.

I think solid colours tend to stand up better than a metallic in base and lacquer. Also a narrow car will have less of a problem than one with flares.

After 20,000 klms my 2.4E has a fair few chips although mainly lower front spoiler and being Light Ivory these are hidden well. The jacking points do take a battering but I just black these now and again and coat with wax for protection.

Actually looking forward to getting a little road rash on the Mongrel

Cheers,

[Bigfoot]

Atmospheric conditions would not effect the weight of the fuel.

You engineers!!! .....sorry my poor phraseology, my understaning is that fuel is more dense, hence heavier, when cold....bloody freezing yesterday!

Hi Darren,

Since you and your thread(s) have educated me in many things, I'm going to attempt to return the favour. Please accept in the benevolent spirit in which offered...

When you filled up your car, an amount of fuel went in. Let's say it was 75kg. Let's say the temperature was a balmy 15C.
Had you immediately taken your car to the south pole (without burning any of your fuel, perhaps using a boat, some dogs and a sledge) and parked it for a while at -40C, the tank would still have contained 75kg of fuel. No additional fuel would have magically appeared, the mass of the fuel stays the same. As you say, the fuel is more dense at -40C, so the 75kg is taking up slightly less volume in the tank, but it's the same mass.

Of course this means that, since the capacity (volume) of your tank is fixed, you can add a greater mass of fuel at the time of filling if you fill it with very cold (more dense) fuel. In such a case you end up carrying a greater mass than if you'd filled up with warm fuel. But, as you can see, it's the temperature of the fuel at the time of filling that has an effect on mass (not its later temperature in your car on a cold day). The fairly large underground storage tanks at a filling station, which I believe are frequently refilled, are unlikely to show large temperature variation I imagine. So I think the effect of this is probably negligible.
I found a rule of thumb from the US: 1% volume change per 15 Farenheight. So in your case if we generously say 3% of the nominal 75kg capacity = 2.25kg.
Think the steel bits are more significant than the fuel temperature...

As an aside, I have a mountain bike that used to have a mass of 9 point something kg which, after lavish expenditure on carbon composite products, now weighs about 0.5kg less. Not the most cost-effective way of lightening a bike with a lardy middle-aged fellow on board, as my wife has uncharitably mentioned...

Can't believe this thread is over! Perhaps we can all keep it alive with random ramblings (see above).

Cheers, Richard.

Legend........!!!

[Darren65]

Funny how sometims even small things can be a big niggle.....



.....that's better ....

[MarkIII]

Funny how sometims even small things can be a big niggle.....



.....that's better ....

You've lost me with that one Darren....

[SeanP]

Cross head to slotted screws?

[Darren65]

Cross head to slotted screws?

Yep, was bugging me every time I got in the car!

[Uk911]

Cross head to slotted screws?

Yep, was bugging me every time I got in the car!

If that bugs you............Your OCD needs tablets.......haha....Mark

[brembo]

Cross head to slotted screws?

Yep, was bugging me every time I got in the car!

If that bugs you............Your OCD needs tablets.......haha....Mark

Darrens OCD is that bad he prefers to call it CDO.

[sladey]

Im generally allergic to originality, but I'm with you Darren - them cross head screws were proper B&Q - I couldn't have lived with them