Running FRST with no thermostat

Problem or technical question?

Running FRST with no thermostat

Postby BOBFRST on Thu Apr 20, 2017 7:47 pm

Right I'm sure this subject has been chatted about before but owing to the FRST's regular love of high temperatures does anyone run their car without a thermostat? I'm currently running an MSD 82 degree item & I know their designed to open up a little quicker but as my car wont be used all the time & warming up times not being an issue, is their any real benefit in running without 1? Does the water flow being less restricted become a benefit? Any advice greatly appreciated :D

CheeRS

BOBFRST
Last edited by BOBFRST on Thu Feb 08, 2018 1:25 pm, edited 1 time in total.
Image
BOBFRST
Senior Poster
Senior Poster
 
Posts: 364
Joined: Mon May 25, 2009 2:15 am
Location: N Ireland
Your car: 1991 Fiesta RS Turbo

Re: Running FRST with no thermostat

Postby knuckles on Wed May 03, 2017 1:54 pm

I did this a good few years ago on my Rs. It's all well and good sat in traffic, but when flying down the motorway the engine temp never reached Normal operating temp.
Heater never got warm either :(
ImageImage
~nomad~ wrote:Good god I love Clark.
knuckles
Elite Post Master
Elite Post Master
User avatar
Posts: 6841
Joined: Thu May 19, 2005 2:40 pm
Location: Hertfordshire
Your car: Fiesta Rs turbo

Re: Running FRST with no thermostat

Postby Mav Singh on Wed Nov 08, 2017 6:52 pm

higher fuel consumption too if the ecu thinks engine is still in warmup stage.
1.6 si
Mav Singh
Elite Post Master
Elite Post Master
 
Posts: 1233
Joined: Sun Dec 29, 2002 3:15 am
Location: West Midlands
Your car: 1995 Fiesta Si 1.6

Re: Running FRST with no thermostat

Postby Mav Singh on Wed Nov 08, 2017 7:03 pm

Mav Singh wrote:higher fuel consumption too if the ecu thinks engine is still in warmup stage.


i was after lower temps in my si, insted of a lower temp thermostat i changed the fan switch to a different one. it runs for longer. standard si rad fan switch is 95c-90c diesel one was 95c to 88c. you can even get a 92-87c one if you want fan to kick in earlier which is the one i went for. no point in getting on that kicks in at 80c otherwise fan will be spinning when your on the motorway.
here is the 95-88 one: https://www.autodoc.co.uk/fae/2495657
here is the 92-87 one: https://www.autodoc.co.uk/hella/938617
they fit my si rad no probs. not sure if they are for the rs turbo, the same website list fan switches for the rs turbo that are 105-95c. thats hotter running.
1.6 si
Mav Singh
Elite Post Master
Elite Post Master
 
Posts: 1233
Joined: Sun Dec 29, 2002 3:15 am
Location: West Midlands
Your car: 1995 Fiesta Si 1.6

Re: Running FRST with no thermostat

Postby BOBFRST on Wed Feb 07, 2018 11:53 pm

Sorry guys only getting to reply to this now ffs I haven't been able to get on the site for some reason :-? Thanks for all the replies. I think im compounding the normal FRST heat issues as im running a T3 which radiates heat like hell onto the back of the rad when stationary & im running a pro alloy front mount which restricts airflow to the rad even more, im running an MSD fan switch already so that's covered & a high flow Spal fan, but my plan of attack is to heat wrap the entire manifold & exhaust housing then put a turbo bag over that, wrap the remainder of the exhaust downpipe, fit a stage 2 Airtec radiator with an enlarged core & bigger frontal area & add a second fan on a manual switch. Hopefully that will do the business..........& if not £5 of petrol & a box of matches will soon sort it :lol: Though any further ideas will be greatly appreciated but don't say ceramic coating cos im already poor :D

CheeRS

BOBFRST
Image
BOBFRST
Senior Poster
Senior Poster
 
Posts: 364
Joined: Mon May 25, 2009 2:15 am
Location: N Ireland
Your car: 1991 Fiesta RS Turbo


Twitter

The second 20th Anniversary article, a dive into the history of how the site came about is available here: https://t.co/kbCfZ4sf0R

17:44, 4th December 2021 Twitter Web App

To celebrate https://t.co/wXVkvJipaS being 20 years old this year, I've written a series of articles detailing the… https://t.co/B0vE0Y3KvP

17:42, 4th December 2021 Twitter Web App

Follow fiestaturbo.com on Twitter:
http://twitter.com/fiestaturbo/

RSS Feeds

Subscribe to the RSS feed

What is RSS?

RSS is a technology that lets you use special applications or modern browsers to notify you you when a site is updated. You can then read the updated content in that application or your browser.

To subscribe to these RSS feeds you need to copy the links above. For instructions on how to add it to the feeds you keep track of, consult the documentation of your RSS reader.