DW's (new?) Sierra 3dr YB race car

[sierra3dr]

Re: DW's (new?) Sierra N/A PINTO race car

Does anyone by chance have a drivers 3dr door, or even just a door handle so that my door is safe??

I thought Hadrian panels would have doorskins on offer,according to their website,apparently not
Import >these< in or try Fenland Fords

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Cheers for that, have got a good door on it now, awaiting paint. Have a couple of spare passenger ones but I might go for composite doors if I need them again soon

Managed to get a new header tank in the car today. I picked up a very reasonably priced Bailey one off of turbosport and this fitted fairly easily as the car obviously had the correct holes already (albeit moved forward to clear the cage bolts on the strut tops).



As you'd expect this fitted as a direct replacement for the old plastic tank that the car came with when I got it but when I went to close the bonnet, Oh s**t, it didn't clear the naca air duct and the bonnet stuck up a few inches

A minute later and a hacksaw neatly removed 2 or 3 inches of the intake under the bonnet and now not only does the bonnet shut but the header cap sits perfectly lined up with the duct hole.
This has three big advantages, first you can easily see that the cap is in place when the car goes out on track(we usually do a last minute walk-around), the cap is held in place by the duct and cannot work loose and best of all the header tank now has a very nice supply of cold air which should help the std rad to keep the water cool enough
More luck than judgement but either way another little job done that I'm very happy with.






Over the next week the engine bay should be getting close to fully mocked up and a lot of the plumbing in place.

[robt100]

Re: DW's (new?) Sierra N/A PINTO race car

Dave, Is it worth putting a small mesh over the duct? As if youre unlucky enough to get something flying into the duct you dont want to damage/puncture the tank and end up retiring from the race.

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Dave, Is it worth putting a small mesh over the duct? As if youre unlucky enough to get something flying into the duct you dont want to damage/puncture the tank and end up retiring from the race.

Yep, gonna mesh it but doubt it would be easy to puncture the top of the tank as they seem pretty tough. The main debris we get is tyre rubber, stones tend to come off of your own tyres and make loads of little dents in the tops of the wings from underneath. Best to be safe than sorry though as you say.

[Group4_Mark2]

Re: DW's (new?) Sierra N/A PINTO race car

I have seen rally cars with expanding foam on the inside of the front wings to stop the stones from putting dents on the inside of the wings. I have also seen some cars with the springs wrapped in some sort of material to stop stuff getting jammed in the coils or damaging the shocks.

Tom

[Graham]

Re: DW's (new?) Sierra N/A PINTO race car

Dave, Is it worth putting a small mesh over the duct? As if youre unlucky enough to get something flying into the duct you dont want to damage/puncture the tank and end up retiring from the race.

i wouldnt worry, the chances of holing that tank are practically non existant, its about 4 times thicker than an alloy fuel tank which sits exposed under the car, with weight being the enemy of a car race its very easy to make a car heavy and uncompetitive through being too cautious,

food for thought, every 3kgs taken out or added to the car is the eqivilent of another horsepower

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Funny enough I've just been round looking at the car and the top corner of that tank is easily as strong as say the intercooler, which is just as exposed, so I'm not gonna mesh that hole as it will then hit the cap more and I've also been looking at removing the mesh from either side of the grille as it seems equally pointless now.
The most likely parts to break are the headlamps, which is why they have perspex covers, but things like stone chips under the wings and to the bodywork are not worth trying to fight. I may even be looking at fibreglass wings for next year as weight is gonna be key to getting this car to work without massive horsepower.

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

OK so its not the real engine yet, just one I've mocked up with help from Ant using my old pinto bottom end Thanks also to Steve and John Pipe for helping me lift it in this morning

Notice that I've also fitted a std airbox. This will get additional ducting to feed cold air in and should supply colder air to the turbo than a stand alone cone filter that sucks in the warm air in the engine bay. The airbox will take a direct feed from a duct which fits behind the o/s spotlamp hole in the bumper plus the origional inlet that comes out by the headlamp.







Thanks to everyone on turbosport who have helped out getting yb parts to me double quick

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Spent today modifying the front bumper to have an air duct to feed the airbox.

This is how the n/s one looks now I've painted the black in behind the mesh;



and this is the o/s one on which I've reused my old air duct and then boxed it in to the spotlamp surround using thin abs plastic and a dash of no more nails ;



From the front you can see that I've also made a hole in the indicator and cut the back of it out to make the most of the width of the duct.

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Front all done, just need to make an inlet in the airbox for the feed pipe now. Also painted the airbox lid (and duct) using halfords plastic bumper paint which I can highly recommend

[Retromotorsport]

Re: DW's (new?) Sierra N/A PINTO race car

Dave , your inbox is full ... delete some

dave , that may be one of the lowest air pressure points on the car, the indicator is on the wrap round, the inner lamp position is in positive flow and may well provide more air than the indicator .. use both of them and fit to a 'Y' piece that then feeds the airbox

[mk2stu]

Re: DW's (new?) Sierra N/A PINTO race car

cant go wrong with no more nails m8

looks good hows the yb comimg along have you found a good donor yet?

if not i may know a man who has 1?do you need a bottom end only or a complete engine?

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

cant go wrong with no more nails m8

looks good hows the yb comimg along have you found a good donor yet?

if not i may know a man who has 1?do you need a bottom end only or a complete engine?

Still on the lookout for either to be honest, pm me if you have some info, cheers

[david_white]

Re: DW's (new?) Sierra N/A PINTO race car

Dave , your inbox is full ... delete some

dave , that may be one of the lowest air pressure points on the car, the indicator is on the wrap round, the inner lamp position is in positive flow and may well provide more air than the indicator .. use both of them and fit to a 'Y' piece that then feeds the airbox

Hi Gary, just had a clear out of messages so there should be some space now

The bumper intake is an extra one to feed to the front of the airbox, and those spotlamp holes are commonly used on sierras to feed air to brakes or oil coolers so hopefully should do something. Being the most forward part of the car means the bumper should get the last disturbed air, although btcc cars also do this and 'tailgating' another car's hot exhaust pipe can cause small losses in power. The simple solution to that is not to have any cars in front of you

I am also fitting an alloy duct next to the headlamp which goes into the origional intake hole in the airbox so hopefully there should be enough air going in, and I still think it's preferable to a cone filter feeding on warm air from the bay.

Next I need to design some nice bonnet vents to allow hot air out from above the turbo