620 nose cone on lesser sevens?

[framerateuk]

My Sigma 140 does get very, very hot in the weather we're experiencing at the moment! I was a smelly, dripping mess after driving back from Silverstone this weekend, which has got me thinking of getting more airflow into the engine bay.

I'm thinking of replacing my nose cone with one designed for a 620. I see a few have done this on various sevens. Are there any disadvantages or reasons they might not fit on other cars? I figure the extra airflow can only be a good thing?

[AndrewGP]

Do the engine temps get too hot as well as yourself in the cabin?

Although I personally think the 620 nose cones would improve airflow and do look cool (and that's reason enough to change it ) it might be easier and cheaper to look at insulating the tunnel and engine bay.

[framerateuk]

AndrewGP said:

Do the engine temps get too hot as well as yourself in the cabin?

Although I personally think the 620 nose cones would improve airflow and do look cool (and that's reason enough to change it ) it might be easier and cheaper to look at insulating the tunnel and engine bay.

Mainly in cabin temps, I don't have an oil temp but water temps are fine when the car is in motion, and the fan kicks on when it's stuck in slow traffic.

It's generally the tunnel that gets hot, but my feet feel the heat from the tunnel and the exhaust. I was only thinking that more vents might get more air through the bonnet area and help soak some heat away from the tunnel.

You're right though, I think insulating the tunnel; might be the best solution.

[nigelpugh7]

I think on any other model apart from a 620, it will be mostly about looks and bragging rights down he pub!

Remember the top ventilation aperture is there to feed cold air to the supercharger intercooler, not to help with lowering the under Bonnet temps.

Also due to all the cut outs, the 620 nose cone is actually fibreglass not carbon, so if weight saving is your thing then it would be better to try and find an R500 carbonnose cone which also has extra cut outs, that were actually there to help cooling and reduce under Bonnet temps.

My 620R gets seriously hot in the cabin in this weather, so you just get used to it and sweat buckets!

On my trip back to the Midlands last week from Anglesey, half was in thunderstorms and the other half of the journey in 29C, it was a pretty miserable 4 hour journey home frankly!

As has been stated anything to get temps down is always an improvement, and for m on my previous R500 it was lining th entire tunnel and footwell areas with heat shielding.

[framerateuk]

Thanks Nigel. It looks like the lining is the way to go, but it seems it's a engine out job to get it done properly.

From other reading I think I need to block off the heater vents around my legs, since I can feel a load of air getting in there. Might be a good short term fix.

[V7SLR]

I've recently added good quality adhesive sound proofing to the tunnel and then bonded the carpet to the soundproofing. It's made a big difference to the radiant heat and driving in France a few weeks ago was perfectly bearable. No need to take the engine out, just fit it on the cabin side. Mine's an SLR so probably generating more heat than a Sigma.

[framerateuk]

V7SLR said:

I've recently added good quality adhesive sound proofing to the tunnel and then bonded the carpet to the soundproofing. It's made a big difference to the radiant heat and driving in France a few weeks ago was perfectly bearable. No need to take the engine out, just fit it on the cabin side. Mine's an SLR so probably generating more heat than a Sigma.

Now that sounds more like it, I was wondering if that would work too! Annoyingly the heat seems to have melted the adhesive on my carpet and it constantly kept falling on my left foot on the way back from Silverstone on Sunday.

Some heat/sound proofing would probably work nicely on the exhaust/cat side to keep that foot a bit cooler too.

[Dave J]

fix the heater so that it really does block coolant flow - new valve from a taxi !!.

then add foil backed bubble insulation behind the tranny tunnel carpet (wickes / b&q etc )
job done

[V7SLR]

Or just take the heater out, you don't really need it anyway.

[framerateuk]

Dave J said:

fix the heater so that it really does block coolant flow - new valve from a taxi !!.

then add foil backed bubble insulation behind the tranny tunnel carpet (wickes / b&q etc )
job done

Good call, seems a lot cheaper than the automotive stuff (and much thicker too).

V7SLR said:

Or just take the heater out, you don't really need it anyway.

Not an option, I love having the heater in the winter..