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Title: Tyre Pressure for HPE Post by: Fulvia 3 on November 20, 2015, 01:19:41 PM Happy owner of a 1978 HPE 1600 since last month. According to my Instruction Book, inflation pressure should be 24 psi !! [27 psi when full loaded and 28 full loaded and constant high speed.] According to a 1976 North American specs Instruction Book, inflation pressure is 28 psi (sounds logical). For the first month I tried 27 psi and she drives nice. I cannot persuade myself to try 24 .... What is your experience on the subject? Thank you, M Title: Re: Tyre Pressure for HPE Post by: HFStuart on November 20, 2015, 02:01:28 PM Maybe 24 on the back when empty but seems too low.
What tyre size? I run 185/65 14 with 29psi all round (in a spider) and it works well. Title: Re: Tyre Pressure for HPE Post by: smithymc on November 20, 2015, 02:24:02 PM My handbook says the same for the coupe - I now run 26 all round one or two up on standard tyres.
Mark Title: Re: Tyre Pressure for HPE Post by: Fulvia 3 on November 20, 2015, 03:24:30 PM Title: Re: Tyre Pressure for HPE Post by: HFStuart on November 20, 2015, 08:17:35 PM Reckon 27 all round would be about right then.
Title: Re: Tyre Pressure for HPE Post by: Neil-yaj396 on November 21, 2015, 09:05:50 AM The pressures in the handbooks always seem to be on the low side by up to date standards.
Title: Re: Tyre Pressure for HPE Post by: lbcoupe76 on November 21, 2015, 10:14:29 AM You have to take into consideration that every tyre manufacturer will have different sidewall construction and therefore different pressures. Tyres have changed a lot since those tyre placards where written. Look up the rule of four for tyre pressure, this works well. if you can't find it i will type it out for you.
Title: Re: Tyre Pressure for HPE Post by: peteracs on November 21, 2015, 12:07:20 PM You have to take into consideration that every tyre manufacturer will have different sidewall construction and therefore different pressures. Tyres have changed a lot since those tyre placards where written. Look up the rule of four for tyre pressure, this works well. if you can't find it i will type it out for you. Good call, I had forgotten about that. Here is what appears to be a good write up http://cdn2.hubspot.net/hub/210453/file-20229690-pdf/docs/importance_of_optimum_tyre_pressure_and_temperature.pdf (http://cdn2.hubspot.net/hub/210453/file-20229690-pdf/docs/importance_of_optimum_tyre_pressure_and_temperature.pdf) Peter |