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Russ Noble · 03-10-07, 01:16 AM

John, for road application, and since you've got that pump in the ZF, I would think heat exchanger/s in the top hose with a remote thermostat in the waterline after the exchanger would work well. That will keep the oil/s close to engine operating temp.

Lets face it with a GT40 (or your V8 Lotus 47) on the road you can only maintain full throttle for short bursts at a time. Nothing is likely to get excessively hot as prolonged full throttle driving is not likely to occur. The car is just too fast for that!

For most road going GT40's though I think Lynns KISS principle applies, forget the complication. Quite frankly on the road, with a decent and properly ducted and plumbed radiator, I can't see heat build up anywhere being a problem at all. Rather the opposite in fact.

For racing, oil and water temps often run uncomfortably high and I would tend to put the exchanger/s in the bottom hose. When you run the motor up to temp before racing an exchanger would have the excellent side effect of also warming up the trans.

Just my thoughts.

BTW, do you know what your 47 weighs?

Cheers

03-10-07, 01:16 AM	#23 (permalink)
Russ Noble Russ Noble Lifetime Premier Supporter Join Date: Jul 2004 Location: Christchurch,NZ GT40: Building scratc Posts: 1,377 Rep Power: 20	Re: Combined rad/oil cooler John, for road application, and since you've got that pump in the ZF, I would think heat exchanger/s in the top hose with a remote thermostat in the waterline after the exchanger would work well. That will keep the oil/s close to engine operating temp. Lets face it with a GT40 (or your V8 Lotus 47) on the road you can only maintain full throttle for short bursts at a time. Nothing is likely to get excessively hot as prolonged full throttle driving is not likely to occur. The car is just too fast for that! For most road going GT40's though I think Lynns KISS principle applies, forget the complication. Quite frankly on the road, with a decent and properly ducted and plumbed radiator, I can't see heat build up anywhere being a problem at all. Rather the opposite in fact. For racing, oil and water temps often run uncomfortably high and I would tend to put the exchanger/s in the bottom hose. When you run the motor up to temp before racing an exchanger would have the excellent side effect of also warming up the trans. Just my thoughts. BTW, do you know what your 47 weighs? Cheers __________________ Scratchbuilt Gulf Mk1, forged, dry sumped 351W. 930 LSD & spraybar, 10s & 14s. Slowly getting there http://www.gt40s.com/forum/gt40-buil...atchbuilt.html Last edited by Russ Noble; 03-10-07 at 01:21 AM.