powerlite lithium ps09

[tom256]

Cant justify a £200 battery again to save a further 3kg, i'd rather just go on a diet for a month.

LiFePo4 are superior to acid battery in every case.

Yeah apart from costing 4 times as much, not being able to exceed 14v and needing a special charger, plus they don't like heat and my engine bay gets very, very hot so would need relocating to the frunk.

Superior in every case yeah!

Lifespan is much longer that acid battery. I'm not sure if also in MR2 hot engine bay. You can use standard if you will not exceed 14V.


Diet is not for me. My weight is 73kg and it is fine 😁

[Petrus]

not being able to exceed 14v

14.5V and the alternator stays below 14.2, lowering to 13.9 on a longer trip.

Also, they are a LOT smaller meaning they do not restrict airflow through the engine room as much, meaning they will be in a cooler place.
Most of us replace the pre-cats which lowers the temp. as does a sbetter flowing exhaust. The temp. is a non-issue on n.a. cars. On forced induction you most times want to move the battery anyway. It does not have to go up front though, the rear cubby will do nicely.

Meanwhile my 800 gramm LiFe is still going great.

[JB21]

not being able to exceed 14v

The temp. is a non-issue on n.a. cars.

It is in mine doing 20 minute stints on track most of it at 8200rpm!

[Petrus]

I'm not sure if also in MR2 hot engine bay.

The MR2 does not have a hot engine bay. It only appears to be because of the hot exhaust/cat sitting at the rear where you stand when opening the lid so you get hit by a hot wave.
Those sitting at the rear means that when on the move the hot air is straight out the back and gone while the engine bay is very well protected from radiating heat by heat shields.
At lower speeds less air flows out but then you are not stepping on it either so less heat is produced.
It only becomes different when a turbo it added. That is a whole different issue and should not be confused with the n.a.

[Petrus]

It is in mine doing 20 minute stints on track most of it at 8200rpm!

Like a different engine is representative, never mind that use.

[JB21]

I'm not sure if also in MR2 hot engine bay.

The MR2 does not have a hot engine bay. It only appears to be because of the hot exhaust/cat sitting at the rear where you stand when opening the lid so you get hit by a hot wave.
Those sitting at the rear means that when on the move the hot air is straight out the back and gone while the engine bay is very well protected from radiating heat by heat shields.
At lower speeds less air flows out but then you are not stepping on it either so less heat is produced.
It only becomes different when a turbo it added. That is a whole different issue and should not be confused with the n.a.

Do you take pleasure in being an insufferable know it all? I know my own bloody car. Jesus Crist man cant you just accept someone else's experience. My car has no heat shields, a 3" cold air feed to the side scoop so does not get as much air into the engine bay that side. WTF am I even having to justifying it, please just give it a rest for once!

[Petrus]

Do you take pleasure in being an insufferable know it all? I know my own bloody car. Jesus Crist man cant you just accept someone else's experience. My car has no heat shields, a 3" cold air feed to the side scoop so does not get as much air into the engine bay that side. WTF am I even having to justifying it, please just give it a rest for once!

I am happy for you that you have chosen the for your specific application correct battery.

Have a nice day, life´s too short.

[1979scotte]

I always think a good debate is half the fun.


I personally find mr2 engine bays quite hot.
I understand not having the radiator in the engine bay should reduce temps but airflow must be better through a front engine car even if the air is warmer.

Admittedly I've had as many modified 2s as I've had standard so maybe thats clouding my judgement.

Maybe I should buy a few cheap magnetic thermometers and see what they read compared to a front engined car.

[Petrus]

I understand not having the radiator in the engine bay should reduce temps but airflow must be better through a front engine car even if the air is warmer.

Airflow is not very good on front engined cars because noise containment is a big thing since early eighties.
Have look at the openings the engine bays of about the past 20 years.

As the 1ZZ and 2ZZ is widely used in the Toyota range the intake temps from the MAF could be compared between models no? That is no definitive answer but neat comparative nonetheless.