Having decided to dry sump the 3S-GTE on my Track Toy project ST205 a bit of research revealed that 3S dry sump kits are as rare as rocking horse poo.

The search did bring up an offering from a New Zealand company that build Lotus 7 type kit cars:

Fraser Dry Sump Pan - 3S Beams Engine



http://www.fraser.co.nz/Engine-Options-16.html

The layout here doesn't quite work in the transverse engine layout of the GT-Four. In the pic above the oil pump is mounted to the back of the block but on a Four that spot is occupied by the power steering. Also, its not certain that the centre channel in the dry sump would provide sufficient clearance for the exhaust downpipe/frontpipe. See pic below


The logical location for the dry sump pump is in the space normally occupied by the air con compressor but its a 'cosy' fit according to JEMS.



By the way, I just love the ease of access to the engine bay now.............see pic below




Fortunately AT Power (makers of throttle bodies) have recently developed a small, lightweight billet 'Cordis Dry Sump Pump'

The short nose version is required for the ST205 3S-GTE

http://atpowershop.co.uk/catalog/cordis ... p-225.html


3 Stage Dry Sump Pump from AT Power
Modular multi-stage rotor pump
Dual ported to improve rotor filling
Selection of pulley ratios available
CNC billet machined
All new Pressure Relief Valve design
ARP bolts throughout the pump
Inlet/outlet ports machined to fit industry std adaptors
Small & lighter than conventional style pumps
Capacity: 14.3 liters per 1000 Pump RPM







The end result should look similar to this twin scavenge pump dry sumped RS500 YB Cosworth. This uses the standard cast sump milled to remove the bottom and then a fabricated dry sump base is welded to the cast sump.





So the plan is to do the same on a spare 3S-GTE sump I have, milling the base off and then fabricating an aluminium one -piece replacement for both the original pressed steel sump and the base of the aluminium section while ensuring there is enough space for the downpipe/front pipe exhaust

Twin scavenge dry sump circulation diagram



There is more to follow on this topic regarding the selection and location of the oil tank in the engine bay plus the detail implementation of the oil feed, removal of the oil/water 'doughnut' and lots more.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Looks really good Don.

The fraser sump doesn't look to be any deeper really than the stock item? Might be worth getting some measurements.

I see you bought the nice shiny pump as well

_________________
GT4DC Events Co-ordinator
1996 ST205 UK

The Fraser dry sump pan is designed for a vertical 3S engine installation whereas in the GT-Four the engine is canted backwards. This means the scavenge trough in the Fraser pan wouldn't really be in the correct position. Another factor is the two scavenge hose outlets in the Fraser pan would have to be reversed to the other side of the trough as my pump will be located on the opposite side of the engine. This is probably achievable but it would require modification of the pan. On balance we think its better to build our own using the 3S-GTE alloy pan as the basis. That way we should end up with something thats not compromised by the canted engine installation in the GT-Four.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

Oh ok - I hadn't considered that.

If your going to have to modify it might as well have one custom made.

_________________
GT4DC Events Co-ordinator
1996 ST205 UK

also the fact that Fraser (to my knowledge) does not sell the dry sump system to anyone else but Seven owners.

_________________
GT Four Adovansu

"I want to enjoy the powerful and nimble agility behavior."

That's interesting. I wonder if its also because the system is quite specifically designed for a vertical north-south installation and they don't want any comeback/consequences of people using it in a different configuration?

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

I wouldn't put it past them, or the fact that that they don't want to supply every man and his dog or field innane questions from boy racers as to whether they can dry sump their system with this setup.

Manufacturing would also be an issue as they are a smaller operation and don't have the capacity to keep a rolling supply of this part available for world wide consumption. Limited runs keep costs down and exclusivity up.

You should email them and see whether a) they are good for engines on a lean b) get your dirty hands on one or at least the option to haha

_________________
GT Four Adovansu

"I want to enjoy the powerful and nimble agility behavior."

Latest update.

Dry sump pan now an aluminium billet CNC machined item rather than based on a 'cut and shut' version of the original alloy sump including an integral mounting flange for the compact twin scavenge oil pump. There was a real risk of the OEM alloy pan warping when welding the fabricated dry sump section so the decision was made to go for the CNC billet approach. It was simpler and cheaper to machine the oil gutter channel horizontal even although it will be inclined when the engine is installed.

Next step is to fit to the engine (the block shown is a spare) so that the oil lines can be routed correctly allowing the removal of the oil/water interwarmer doughnut on the front of the block.

The car will be trailered to BTB in the next couple of days for them to fabricate the downpipe, wastegate, 100 cell cat and silencer plus associated 3" pipework all in 302SS. 1.8mm for the downpipe and 1.2mm for the remainder.

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

OMG this looks AWESOME.

I don't want to think about how much that cost :eyewatering:

Do you have a location in mind for the oil tank?

_________________
GT4DC Events Co-ordinator
1996 ST205 UK

The correct engineering solution I think, and looks excellent.

_________________
If at first you don't suck seed, try drier grain.

Very nice

2 things not related as I know bugger all about dry sumps.

1) turbo oil feed hose, is it worth considering an inline oil filter here? I have fitted mine with one to save turbo from bits in event of engine failure.

2) I assume the big straps are for the oil tank? What air inlet & filter have you decided on? Looks like it may restrict your options with filter?

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Hi,

you are just crazy

greetz

_________________
KEEP COOL UNDER PRESSURE

street legal?.....perhaps in tschibuti

I see a very critical design error. Because we're friends I'll take it off your hands for 10 GBP?

_________________
René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be

I'm sure this is well in hand but

Isn't it missing some bell housing bolts?

Too many questions, all shall become clear in the fullness of time. Exhaust system is the latest challenge

_________________
Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp