S1 cooler on the fuel return
Discussion
It appears a 'few' of our cars had these, although obviously very rare and probably totally unnecessary. My S3c has one and before the front end refurb I undertook in 2010 it looked exactly like yours including the same protective grill underneath to protect it from potential stone damage.
If I remember correctly someone told me that Cerberas have them as standard but I'm happy to be corrected.
Here is is pic I took at the time of the refurbishment.
OT. Can someone please tell me how to add a larger image to a thread? I used to use Photobucket and clearly haven't got to grips with Thumbsnap!
If I remember correctly someone told me that Cerberas have them as standard but I'm happy to be corrected.
Here is is pic I took at the time of the refurbishment.
OT. Can someone please tell me how to add a larger image to a thread? I used to use Photobucket and clearly haven't got to grips with Thumbsnap!
Edited by TVR-Stu on Monday 27th November 11:51
Barkychoc said:
Not something I'd be keen on. A hole in the rad = fuel pi55ing everywhere under pressure 
It does seem a bit vulnerable, I’ll try it without. I’d like to know what problems they had that made them think to fit one. If your sat in traffic I can’t see it doing much anyway. v8s4me said:
Surely for a cooler to have any benefit it should be on the pressurised side?
Cooler fuel = denser charge = bigger bang
The most benefit is on the hot side, the fuel is pumped through the fuel rail that's bolted to the hot engine, through the pressure reg then returns back to the tank hot. If you have a large amount of fuel being returned because you'd specced the pump for just in case you stick a bigger engine in, supercharge it and run it on alcohol then you can potentially get a lot of heat in the tank.Cooler fuel = denser charge = bigger bang
If you had a set up with very little/no returned fuel then yeah, you could cool it after the pump but that's not typical in a car from the early 90s.
I have once had a fuel vapourising problem with my '87 S1. This was on a long steep hill in very hot conditions and a gradual misfire crept in. This got worse until the thing stopped and wouldn't refire. We finally got it going by turning around and jump starting it while running down hill. I found out about these fuel coolers then but never got around to doing anything about it. I have not had the problem since but have not been in the same conditions either.
Dave
Dave
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