Scotts Yellow Supercharged V6 Roadster

[1979scotte]

Until next year then...

What does this mean for how Bee is running this year?

Should be fine.
Previous map was good we just had boost issues.
Now they're sorted will just load that map up and give it a run on the Dyno for safety.

[lamcote]

@1979scotte can you tell me if the Det3 is any good for implementing knock control? I have read it doesn't have a knock sensor built in, but is it able to use the standard 1zz knock sensor?
Thanks

[1979scotte]

@1979scotte can you tell me if the Det3 is any good for implementing knock control? I have read it doesn't have a knock sensor built in, but is it able to use the standard 1zz knock sensor?
Thanks

All piggybacks should be at the mercy of the stock ECU when it comes to knock.
Pretty sure my knock sensors are doing there job.
Could be different in fuel implant mode where the det3 has total injector control.

[1979scotte]

Got her back all was well 4psi of boost will do until we can find a decent ECU for a V6.

Until today when she over heated and spat her coolant out.
Took 5.5L to fill her up again and seems fine.
No obvious leaks so it must be head gasket or water pump.
No sitting in traffic all motorway or national speed limit stuff.

[ayresyboy]

Got her back all was well 4psi of boost will do until we can find a decent ECU for a V6.

Until today when she over heated and spat her coolant out.
Took 5.5L to fill her up again and seems fine.
No obvious leaks so it must be head gasket or water pump.
No sitting in traffic all motorway or national speed limit stuff.

There was something about the water pump with the V6 conversions. Apparently the blueprint part with correct part number was actually the wrong type. I'm sure there is a thread on twobrutal. Not sure the history of your conversion but that may be something you want to try check. Andy

[StuC]

Glad you have her back and she is running ok.

Re:coolant. How many of the undertrays are in place?
I ask, as it can be tricky to determine losses with them in place, depending on the volume.

[1979scotte]

Glad you have her back and she is running ok.

Re:coolant. How many of the undertrays are in place?
I ask, as it can be tricky to determine losses with them in place, depending on the volume.

No rear under trays.
Have the front ones.
5.5L is a lot to loose it's not like i don't check.
Unless we had the mother of all airlocks.

@ayresyboy thanks Andy.
Having sniffer test Thursday.
Will look for leaks but am not hopeful.
Didn't drop any at Pat garage or the Dyno.

[ayresyboy]

My Mk2 1mz spat it's coolant out too. Got annoyed so it's hidden away in the garage until I can be bothered to do something about it.

[loadswine]

sorry to hear of the coolant issue. I had similar, years back, on my way back from Corfu, on the shores of Lake Constance, where I had been sitting in traffic for a while.
Radiator end cap on stock rad, popped undone.
I put a Koyo rad in, when I got home and installed a secondary water pump, which was very useful, but in the end, my underlying issue was my head gasket, unfortunately.
I replaced the Toyota item with a bespoke copper gasket, but it wasn't cheap, at the time. It was made by Ferriday and once fitted, never had a moment's trouble with it.
http://www.ferriday.co.uk/head-gasket-drawings-on-file/

[1979scotte]

@loadswine

Thanks Nigel all advice welcome

[1979scotte]

I am pretty sure it is pressure related.
Somewhere 8n the system there could be a leak or the rad cap could be shot. Again.
Did some playing yesterday.
No sludge in the oil cap.
No white exhaust fumes.
Temperature gauge just below operating temp and she blew coolant out all over Waitrose car park. About 500 ml.
Will still have a sniffer test done.

[loadswine]

On the 3VZ Scott, the water filling neck was on top, next to the driver's side suspension tower, and if I had the filler cap removed and revved the engine, many tiny bubbles appeared, almost like fizzing. I did a vid at the time and will see if I can find it. That was what confirmed head gasket for me.

[1979scotte]

Local garage have looked at the car.
They dont think it's the headgasket and found no leaks.
That really only leaves the water pump or the rad cap.
Will take her down to see uncle Patrick tomorrow and see what he thinks.

[StuC]

Local garage have looked at the car.
They dont think it's the headgasket and found no leaks.
That really only leaves the water pump or the rad cap.
Will take her down to see uncle Patrick tomorrow and see what he thinks.

Good news, I guess. I am guessing you'd be happier with Patrick's confirmation of that though. I am sure he would have picked it up if it was loosing that much.

[1979scotte]

Still stumped at the overheating.
Have ordered a new japspeed radiator thermostat and proper Toyota coolant cap.
Next will probably try water pump.
After that it will be engine out.

[chasmundo]

Did Patrick manage to help diagnose or narrow down ?

[Topdownman]

Still stumped at the overheating.
Have ordered a new japspeed radiator thermostat and proper Toyota coolant cap.
Next will probably try water pump.
After that it will be engine out.

Sad times Mate.

[Joesson]

@1979scotte
Have gone back to this thread to continue about your coolant loss problems.
As far as I am aware any coolant loss is via the cooling/ heating system via the radiator and all the pipe work with lots of suspicious joints.
As I understand it all this has been checked and the problem persists.
Where else can coolant leave the system- you are now going to look at the head gasket, because, as you say your 2 idles but looses coolant when boosted. But you have no indication of emulsification of an oil water mix.
In the olden day's, engine blocks had another outlet in the block, formed I understand to assist the casting process. This was sealed with an oversized steel disc, a core plug , that was an interference fit into the hole. I do recall this being mentioned as a source of leaks on some older engines.
I have used " search"  for "core plug" with no result, so perhaps there is not one on a 1zz or on your 6.
If there is though, just maybe!

[1979scotte]

@Joesson
Thanks mate
We have a few other ideas @StuC remembers another member having similar issues with a V6 and the coolant system was plumbed incorrectly.
Hopefully as we start to pull things apart will will notice something amiss.

Car has now has radiator replaced.
It was a 50mm Koyo rad that was leaking from both sides and had a dent in it.
New japspeed 40mm there now. Rad fit nicely but was a hassle getting the fan to fit needed fettling.
Also new Toyota thermostat and coolant cap.

[Carolyn]

Might I suggest running her up to temp and letting her idle for a while in one spot.  A leak should manifest beneath the car, at some point. 

[1979scotte]

Might I suggest running her up to temp and letting her idle for a while in one spot.  A leak should manifest beneath the car, at some point.

This was done prior to Ding Day no leaks manifested themselves.
Even from the radiator which had obviously seen better days and been leaking.

[Joesson]

@1979scotte  - have a look at this link. Core plugs exist and can leak.

https://www.mr2roc.org/forum/Smileys/Lots_O_Smileys/happy11.gif

[StuC]

@1979scotte  - have a look at this link. Core plugs exist and can leak.

https://www.mr2roc.org/forum/Smileys/Lots_O_Smileys/happy11.gif

Are you sure that is the right LINKY Tony?

[Joesson]

Thank you @StuC, that is not the link I intended!
This one should be-

https://www.honestjohn.co.uk/forum/post/index.htm?t=12495

[Carolyn]

Might I suggest running her up to temp and letting her idle for a while in one spot.  A leak should manifest beneath the car, at some point.

This was done prior to Ding Day no leaks manifested themselves.
Even from the radiator which had obviously seen better days and been leaking.

In which case it must be going into the combustion chamber.  (As we discussed at Ding Day).