Redtop sprint

[straylight]

great watching this build come together. Someone who knows what they are doing ! That prop shaft is excellent.

stu

[iandollysprint]

great watching this build come together. Someone who knows what they are doing ! That prop shaft is excellent.

stu

Stu, thats kind of you Not sure about knowing what I am doing though but I do take my time and think alot about what needs to be done. Trawling the forums for advise also proves very useful...that includes the vauxhall forums
Ian

[iandollysprint]

Trial fitted the heater blower.
The flap mechanism has been rotated about 90 degree so it does not foul the rocker cover. There is about 3mm clearance from the metal tube part to the rocker cover so I think I will slightly reposition it to give move clearnace. The flexible rubber hose does touch the rocker cover. I might have to fabricate something so I can get some clearance. Would be good to retain the heater though. Or give it a go as is and hope it doesn't melt...

Ian

[iandollysprint]

Found a home for the header tank. Washer bottle will have to be relocated but that shouldn't be a big deal.
I also include a diagram showing the proposed cooling circuit. It will follow the original vauxhall design in principle. Comments welcomed.

Ian

[sprint95m]

That is a good location for the header tank, Ian.
Is that a Peugeot one? I wondered if one could fit there. More importantly, does it have a low level
warning sensor? It is worth the expense of fitting and plumbing in an alternative header tank just to
acquire a low level warning....

Your coolant hose plan looks fine to me save one thing. Namely,
shouldn't you try to vent from the highest point of the cooling system, which is the engine (as well as the radiator)?
Don't Vauxhalls have two vent connections on their header tanks for that reason?
A hose tail fitted to the thermostat housing cover and
you could use a T-piece to join the vent hoses near the header tank.....

Have you settled on a radiator?
I have got one sitting here for a Saab 9-3 (2litre turbo) but it has the vent on the RH side and the outlet hose
from the header tank is plumbed into the bottom hose (you will need about 1.3m of 19mm bore hose). This radiator
will be a tight fit between the chassis legs and of course the belt driven fan needs to be removed.


Hope this is useful food for thought,

[iandollysprint]

That is a good location for the header tank, Ian.
Is that a Peugeot one? I wondered if one could fit there. More importantly, does it have a low level
warning sensor? It is worth the expense of fitting and plumbing in an alternative header tank just to
acquire a low level warning....

Your coolant hose plan looks fine to me save one thing. Namely,
shouldn't you try to vent from the highest point of the cooling system, which is the engine (as well as the radiator)?
Don't Vauxhalls have two vent connections on their header tanks for that reason?
A hose tail fitted to the thermostat housing cover and
you could use a T-piece to join the vent hoses near the header tank.....

Have you settled on a radiator?
I have got one sitting here for a Saab 9-3 (2litre turbo) but it has the vent on the RH side and the outlet hose
from the header tank is plumbed into the bottom hose (you will need about 1.3m of 19mm bore hose). This radiator
will be a tight fit between the chassis legs and of course the belt driven fan needs to be removed.


Hope this is useful food for thought,

It doesn't have a low level sensor but again I think I could fit one. The tank came from some french hatchback, couldn't tell what it was! There were a few of this design in the scrappy. I have had to shave a couple of lugs off, but i will just sit it on a modified washer bottle bracket. This is definetly the place to have the tank.

Re venting. Vauxhall had a vent from the inlet manifold outlet point which I assume is the high point on the engine. I was looking into this further yesterday and the best solution would be to have a 10mm tap in from this point and run the hose alonf the top of the manifold to the bulkhead and then acroos to the header tank teeing in with the rad one. I think this will sort it out.

Re radiator. I actually have a choice here. I could use the original sprint one with kenlowe attached and just block the top left small bore outlet and use the main top and bottom 32mm connections. This would be just to get me going though.

I will probably end up with enlarged sprint replica in aluminium. I have loads of space in front of the engine (200mm from inner front panel to engine pulley). I would go for one that bolted to the original bolt holes but was a depth of say 70mm (or bigger) using a bigger core. I think "eigthiesflamer" went down this root with good results.

The SAAB one would be interesting as well. Any pics so I can weigh it up?

With regards to the plumbing I am making a fancy connector to mate the 35mm/22/15 hoses near to the pump inlet. Out of copper plumbing pipe of all things. It should work though, i'll post pics when done. I will use the same approach for the vent line connections. It's the cheapest root...

Ian

[iandollysprint]

Or I could tee into the thermostat housing outlet as you suggest, my engine is fitted with a 7 degree tilt though so I will have to look at which is the highest point.

[iandollysprint]

PS header tank was from renault clio. Interestingly you can get aluminium replicas which would be nice! No low levl sensor though.

[iandollysprint]

PS header tank was from renault clio. Interestingly you can get aluminium replicas which would be nice! No low level sensor though.

[sprint95m]

The SAAB one would be interesting as well. Any pics so I can weigh it up?

I'll take some this week and email them to you.

[sprint95m]

Just been checking your cooling circuit drawing again following our correspondence about Saab radiators.
In your diagram the header tank outlet goes to the bottom of the radiator, however a Saab radiator
does not offer this facility. It will therefore be necessary to connect into the bottom hose (between rad
and water pump).
It needs to be the bottom hose (rather than a heater hose for instance), for best effect if I am understanding the
theory properly.

[iandollysprint]

Right then, exhaust manifold has been finished off. I used some 38mm flexible stainless steel exhaust tubing. It was really good to manipulate the shape to suit the small gap as the exhaust leaves the engine bay. I also used a cut down sprint down pipe to connect straight into the middle box. All it needs now is a bracket coming off the gearbox mount to keep it all in place. Remember this is just to get me going so I can take it soemwhere to have a proper one made up.

Also decided on my radiator choice with the help of sprint95m. I will be using a SAAB 93 turbo item which apparently will just fit in. I can also get one with an integral oil cooler fitted which would be good. About to buy all the hoses and reducers needed to plumb it all in. Its starting to take shape now.

Ian

[mbellinger]

That's nice work. With your engine mount on the turret there you are very tight for space for the exhaust - well done.

[iandollysprint]

Ta, i think when i get the proper one made it might have to split, with two of the primaries going underneath the mount and the other two on top of it. I think eightiesflamer did it that way.

Might be a bit expensive though! I intend to keep the 2 inch sports exhaust system that is on my sprint ( so it looks like a sprint and so I dont have to chuck yet more money at it.) I can't work out though if a 2 inch exhaust system is going to be big enough to flow 200bhp worth of gases. Where ever I look on the forums people talk abou 2 1/2 or 2 1/4 inch systems.

Ian

[tinweevil]

I don't think power is relevant is it Just capacity, cam, rev range and where up that range you are interested (peak torque, peak power or somewhere in between).

There's a primer here.