www.imoc.co.uk Forum Index
 AlbumAlbum CalendarCalendar FAQFAQ SearchSearch MemberlistMemberlist Legal NoticeLegal Notice IMOC 1/4 Mile1/4 Mile Table Knowledge BaseKnowledge Base   RegisterRegister 
 GarageCommittee GarageGarage  SubscriptionPremium Membership  ProfileProfile   Log in to check private messagesLog in to check private messages   Log inLog in 
Calendar 
[Mk2] [Turbo] pre-rads.....extra fan required?

 
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK2 1990 - 1999 NA & Turbo -> Modifications
View previous topic :: View next topic  
Author Message
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Wed Aug 02, 2017 9:57 am    Post subject: [Mk2] [Turbo] pre-rads.....extra fan required? Reply with quote Reply with quote including images

i wondered what are peoples thoughts on extra fans if running a pre-rad for a CC system.


currently i have just the 1 oem fan attached to my alloy radiator, but thats it. and that on sits on drivers side.

theres no space to fit anything between prerad and rad.
should i consider or think about another oem fan for the pass side?

thanks

[thumleft]
Back to top
User is offline 
androo007
Premium Member



Joined: 03 Mar 2014
Posts: 2050

Feedback Score: 9

1994 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Wed Aug 02, 2017 10:46 am    Post subject: Reply with quote Reply with quote including images

Thats all i have Jim chap, OEM fan on rad. I've not heard of additional fans for CC personally as I'd have thought it would distrupt the airflow through the main radiator core.
Back to top
User is offline 
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Wed Aug 02, 2017 11:46 am    Post subject: Reply with quote Reply with quote including images

it was more a concern when stuck in traffic, aka waiting at the Pod, ha
Back to top
User is offline 
pbmr2
Premium Member



Joined: 18 Jun 2010
Posts: 743

Feedback Score: 10



PostPosted: Wed Aug 02, 2017 11:54 am    Post subject: Reply with quote Reply with quote including images

Just running a pair of stock fans on mine atm.

Have you run yours with just the 1 fan yet? what at the temps like? Was thinking about going down to just 1 stock fan instead of 2.

only reason being weight saving, but don't want to impact the cooling.
Back to top
User is offline 
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Wed Aug 02, 2017 12:01 pm    Post subject: Reply with quote Reply with quote including images

only ever had 1 for rad, temps good.

pre-rad, havent driven car yet, so not sure of any heatsoak, even then, i dont have a coolant temp gauge for this.
though now you mention it, i think i may well get one as my swirl pot has a spare port that look slike a 1/8npt
Back to top
User is offline 
pbmr2
Premium Member



Joined: 18 Jun 2010
Posts: 743

Feedback Score: 10



PostPosted: Wed Aug 02, 2017 1:05 pm    Post subject: Reply with quote Reply with quote including images

yeah I've got no temp sensor for the CC yet, thinking of adding that after it's all up and running well first.

Would like the whole intake/outlet temp, charge in/out temp setup but it's not really needed and just a nice to have. Displaying all the info in a neat way is half the battle there.

Good to know about the fan. have removed the A/C so might rewire the main fan to the passenger side and only run 1.
Back to top
User is offline 
Ja99a




Joined: 03 Jan 2005
Posts: 878
Location: Bright Baginton
Feedback Score: 7

1992 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Wed Sep 27, 2017 4:53 pm    Post subject: Reply with quote Reply with quote including images

If you have removed the AC then you can run the other fan by fitting a switch instead of the AC sensor under the bonnet, when I go to the pod or something I just go under the bonnet and switch it on so I have both fans running.

Ive done the same on the engine lid so I can break the circuit with the sensor.
Back to top
User is offline 
markstevieandmads




Joined: 05 Aug 2013
Posts: 1725
Location: Swindon, Wilts
Feedback Score: 4

1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Wed Sep 27, 2017 5:35 pm    Post subject: Reply with quote Reply with quote including images

Ja99a wrote:
If you have removed the AC then you can run the other fan by fitting a switch instead of the AC sensor under the bonnet, when I go to the pod or something I just go under the bonnet and switch it on so I have both fans running.

Ive done the same on the engine lid so I can break the circuit with the sensor.


This is exactly what i done. Switch is in the cabin. Never needed to use it though and the st205 core is always cool to touch even after a track run.
Back to top
User is offline 
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Tue Oct 03, 2017 7:23 am    Post subject: Reply with quote Reply with quote including images

Car had no aircon option.
So no pipework, fan etc

Still tempted to fit another fan, just to help things at standstill.
Back to top
User is offline 
blogsy




Joined: 16 Jun 2012
Posts: 262

Feedback Score: 2



PostPosted: Tue Oct 03, 2017 8:20 pm    Post subject: Reply with quote Reply with quote including images

You should fit a nicely engineered, easily accessed drain that will allow you to empty off your hot/warm Red forlife into a bucket. Then you can fill it back up with ice cold water for each run. Then at the end of the day put the red back in. keep enough in the system at each change that you keep the pump primed, that would depend on the position of the nicely engineered drain. What do you think.
Back to top
User is offline 
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Tue Oct 03, 2017 9:42 pm    Post subject: Reply with quote Reply with quote including images

Surprisingly enough, Iím not worried about my cc water after having this setup for a couple of months.
Itís more worry of blocking off the engine coolant rad. My coolant temps are up about 2-4c since sticking a pre rad in front of it.

I run straight distilled water for my CC system. Is always cold. I was expecting a lot of radiant heat from coolant rad to the cc rad, but seems the small amount of spacing I have is plenty and the CC rad is always cold/ambient.
Setup must be pretty efficient so canít complain.

Iím likely worrying over nothing after running this for a little while.
Back to top
User is offline 
pbmr2
Premium Member



Joined: 18 Jun 2010
Posts: 743

Feedback Score: 10



PostPosted: Fri Oct 06, 2017 1:39 pm    Post subject: Reply with quote Reply with quote including images

Winter is just around the corner, might want to rethink the pure water content of the CC system, even if parked in the garage it can get below 0.

Running a weak 25/75 mix in mine.
Back to top
User is offline 
jimGTS
Premium Member



Joined: 14 Dec 2004
Posts: 13946
Location: North Kent
Feedback Score: 35

1997 Toyota MR2 Mk2 Turbo Rev4

PostPosted: Fri Oct 06, 2017 1:44 pm    Post subject: Reply with quote Reply with quote including images

yeh ill added in a ltr or so of pure stuff, think theres only like 3ltrs in the system.
Back to top
User is offline 
pbmr2
Premium Member



Joined: 18 Jun 2010
Posts: 743

Feedback Score: 10



PostPosted: Fri Oct 13, 2017 3:00 pm    Post subject: Reply with quote Reply with quote including images

Worked mine out and the numbers came back a little small. like 1.4l for all the pipework, which seems a little small.

think the core holds about 1L and the rad about the same. 3.4L for the whole system, seems quite low. Never measured the volume, might have to drain it to find out.
Back to top
User is offline 
Display posts from previous:   
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK2 1990 - 1999 NA & Turbo -> Modifications All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group