416 replies to this topic

[The Batman]

Do it A4 size and will do it

[Duncan_F]

Do it A4 size and will do it

Ali is in charge of all official sticker decisions.

[AliM]

permission granted

Edited by AliM, 20 April 2013 - 06:28 PM.

[The Batman]

can you provide the sticker

[AliM]

lol, i'm sure I could order it at the same time as the tohers we need doing. You best be making it worth our while...

[The Batman]

have it ready for brands

[AliM]

Jobs for this coming weekend: Fit new brake pads, bleed and replace the fluid, Oil change. Question: Re the swirl pot set up, we only used 1/4 of a tank at the race last weekend. I know that based on how little we used means we don't need to carry as much, which would save weight, but that carrying less could cause fuel starvation. Is the extra weight saving really worth us doing it at this stage? Maybe i'm being a wally and there are other benefits i'm missing here. What do people think?

[Pidgeon]

The whole point of the pot is to allow an irregular feed from the tank, so use minimal levels in the main tank, but it will only shave 1/100ths from your current time.

[AliM]

The whole point of the pot is to allow an irregular feed from the tank, so use minimal levels in the main tank, but it will only shave 1/100ths from your current time.

Sorry Andrew you're in danger of confusing me further lol. The irregular feed is the cause of fuel starvation though right?

If we're carrying a lot of fuel, but hardly using any, then presumably the only benefit to us at the moment of fitting it would be that we could carry less fuel and not suffer for it. But if like you say, it's not going to make that much difference to our times then it's probably a lot of hassle for minimal gains.

[The Batman]

Swirl pot helps eliminates fuel starvation so run less fuel

[AliM]

Swirl pot helps eliminates fuel starvation so run less fuel

Benefit of running less fuel would be weight saving, but would the weight saved really make that much difference at this stage in our racing adventures?

The car is still better than us at the moment, so maybe the swirl pot etc could wait until we can't get any more out of the car? i'm just trying to work out how much of a priority it is.

[Pidgeon]

Swirl pot is very low priority at the mo. The guy who came second in the last PBMW race was suffering from an intermittent cut. Made no difference to his result (although would have done if someone was up his chuff).

Purpose of the pot is to ensure a constant feed to the engine. Fuel surge in the main tank can cause the main pump to suck air. The much smaller volume of the swirl pot, together with the fact it is overfed (tank pump and engine return supplying it), means that supply to the secondary pump is much more reliable. Not many cars will use more than a litre a lap, so a one litre pot should provide a full lap even if the main tank is dry.

I didn't understand why you fitted one in the first place, to me it is a reliable solution to irregular feed, but unnecessary complication until you have that problem. Many competition cars use aftermarket tanks in the boot, but if you retain the original tank, starvation is unlikely to be a problem until you are nearly empty.

Best solution, half fill the car next time, that will save 20-30 kilos, which is worthwhile.

Edited by Partridge, 22 April 2013 - 01:48 PM.

[AliM]

We thought we'd need to fit one because it's a 40 minute race, with a relatively small tank, we thought we'd use a lot more fuel! ok thanks for your comments, probably not worth spending the time fitting it yet then

[Pidgeon]

Ahh, didn't realise it wasn't on yet. Then you are right, don't bother. Assuming you are on a standard tank and don't fit it in the engine bay (where mine is) you're possibly creating another headache/potential scrutineering fail with the bulkhead sealing + reduced reliabilty with twice as many pumps to go wrong.

[Duncan_F]

We've had the timetable through for Brands Hatch. 11:00 - 11:20 - Qualifying 16:40 - 17:20 - Race

[rob999]

Oof...long day for you guys....

[AliM]

It's should be a quicker drive back than Snett as it's all motorway, oh and I'll be in the VX Sorry Dunc!

[Duncan_F]

Oof...long day for you guys....

Yeah, I'm not going to get back home until well past midnight, and I'm in work the next day.

[AliM]

Fingers crossed the race will be early again and we can hit the road!!

[Guy182]

May be out of Tin Tops. The cost to get my engine up to competitive sort of power for Class D would be in the region of £3k. It's not been the best year at work, so don't want to spend that out now.
My lap times at Brands recently are in the same window as the SaxMax times (so know it's not my driving!), but a bit over the Tin Tops times. Brands isn't a massive power track either, get out on Combe or Silverstone and that gap will open right up.

Thankfully I now have the parts to bring the suspension up to spec (SaxMax runs standard rear torsion bars, way too soft!), a much shorter gearbox (VTR ratios are interstella). If can get them fitted soon, looking at booking a trackday at Brands for 15th December, see if can get the new bits on and how much that improves laptimes.

I used to run a 1.1 gearbox on my 106 VTR for the shorter ratios. Topped out at 110/115, VTS' rev bit higher though.