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use the hi octane exchange sump. way better than a puny 800ml extra. ive seen bearings spin on gtrs wityh the extension. simply not enough oil.

the sump i made holds around 8.5 litres to the high mark on the stick. no surge at all as yat.

you can't use both. but for me unless you have a high volume oil pump (like tomei, trust etc) I would use the baffles.

simply because to fit the extension your sump needs to be cut in half and I have seen some welded on extensions that were done pretty poorly. and it's very important that the pick-up is sitting at the right depth inside the sump. also they hang quite low, it shouldn't be a problem, but if for instance you spun off the track backawards over a ripple strip (happend to me!) it would be in danger of getting collected. plus the extra capacity adds a lot of $$ to your oil change if you are using oil like motul chrono (which you should be).

so I reckon unless you really need extra capacity, just use the tomei baffles.

...also they hang quite low, it shouldn't be a problem, but if for instance you spun off the track backawards over a ripple strip (happend to me!) it would be in danger of getting collected.....

That's what worries me about the extensions.

well...i've had both on my race car and have seen some minor surge using the tomei style baffles - never had any sign of trouble with the trust extended sump.

but keep in mind this is on excellent tyres with great traction, right on the limit - I don't think most cars would see any difference.

re clearance I've run the extended sump on plenty of tracks including some offs and not hit it......but thats not to say it could never happen - the trust sump definately hangs lower than the subframe

well...i've had both on my race car and have seen some minor surge using the tomei style baffles - never had any sign of trouble with the trust extended sump.

but keep in mind this is on excellent tyres with great traction, right on the limit - I don't think most cars would see any difference.

re clearance I've run the extended sump on plenty of tracks including some offs and not hit it......but thats not to say it could never happen - the trust sump definately hangs lower than the subframe

Thanks for that, I do intend to run the car at the track so good to hear from someone who has tried both in those conditions

use the hi octane exchange sump. way better than a puny 800ml extra. ive seen bearings spin on gtrs wityh the extension. simply not enough oil.

the sump i made holds around 8.5 litres to the high mark on the stick. no surge at all as yat.

I'd say that has more to do with the build and not overfilling than not enough in an extended sump.

well I'm convinced. both dave and duncan I know have thought about this a lot. so I'd go with their idea. especially if you are using a nismo oil pump (not nissan N1, but actual nismo pump) as they flow a fair bit more oil than a stock pump at any given pressure.

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