The Ford Barn

red or green · 08-24-2021, 05:11 PM

Hello to all in T land
I acquired a 1918 T Roadster awhile back, though it has electric start added and changed to a steel firewall.
It was running pretty rough and I started down the road of troubleshooting.
In the process, I took all the spark plugs out and performed a compression test.

40 PSIG on all four holes.

I'm doing this at 7000' elevation so if you add 25% compensating for altitude, round numbers, it would be 50 PSI at sea level
I am thinking that is in the ballpark of acceptable for a T engine.
Agree or disagree....??

I've got it running well, it's remarkable what rebuilding and timing coils will do in conjunction with a new timer!

Thanks

J Franklin · 08-24-2021, 07:22 PM

Your engine seems ok.

red or green · 08-25-2021, 07:22 AM

I was thinking so,
Thank you for the confirmation

redmodelt · 08-25-2021, 09:05 AM

Even at sea level, 40 would be ok.

G Baese · 08-25-2021, 11:41 PM

Hello there Mr Red or Green,
Is it the car or your drive way?
Its a great little car!
Cheers,
gb

redmodelt · 08-26-2021, 10:14 AM

Sponsored Links (Register now to hide all advertisements)

Guessing, you are talking abut the cut off pickup? If so, thank you!

08-24-2021, 05:11 PM	#1
red or green Junior Member Join Date: Aug 2011 Location: On a rock pile, Tijeras NM Posts: 12	Compression PSI Hello to all in T land I acquired a 1918 T Roadster awhile back, though it has electric start added and changed to a steel firewall. It was running pretty rough and I started down the road of troubleshooting. In the process, I took all the spark plugs out and performed a compression test. 40 PSIG on all four holes. I'm doing this at 7000' elevation so if you add 25% compensating for altitude, round numbers, it would be 50 PSI at sea level I am thinking that is in the ballpark of acceptable for a T engine. Agree or disagree....?? I've got it running well, it's remarkable what rebuilding and timing coils will do in conjunction with a new timer! Thanks

08-24-2021, 07:22 PM	#2
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,370	Re: Compression PSI Your engine seems ok.

08-25-2021, 07:22 AM	#3
red or green Junior Member Join Date: Aug 2011 Location: On a rock pile, Tijeras NM Posts: 12	Re: Compression PSI I was thinking so, Thank you for the confirmation

08-25-2021, 09:05 AM	#4
redmodelt Senior Member Join Date: May 2010 Location: Portland OR Posts: 6,408	Re: Compression PSI Even at sea level, 40 would be ok. __________________ I know the voices aren't real but damn they have some good ideas!

08-25-2021, 11:41 PM	#5
G Baese Member Join Date: Apr 2013 Location: Ft Collins, CO Posts: 87	Re: Compression PSI Hello there Mr Red or Green, Is it the car or your drive way? Its a great little car! Cheers, gb

08-26-2021, 10:14 AM	#6
redmodelt Senior Member Join Date: May 2010 Location: Portland OR Posts: 6,408	Re: Compression PSI Sponsored Links (Register now to hide all advertisements) Guessing, you are talking abut the cut off pickup? If so, thank you! __________________ I know the voices aren't real but damn they have some good ideas!

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