I’d like to put something out there that never really seems to get mentioned about the Prus head. Of course the power difference it offers is a noticeable improvement on our cars, but the one aspect that seems to be overlooked is what that additional compression does for the engine’s retarding ability on long downgrades.
I live in the flatlands of southern New Jersey and just finished up doing the Luray Tour. The affect that I felt driving with that head on my car was outstanding and I now rank it up there as a safety item. I do have disc brakes also but found myself just letting her chug down the hills with the throttle shut and rarely used the brakes. This was my first hilly run on my Prus engine and I will be putting this head on all of my T’s.
Prus High Compression Head bonus
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Topic author - Posts: 235
- Joined: Sun Feb 24, 2019 9:37 pm
- First Name: David
- Last Name: Young
- * REQUIRED* Type and Year of Model Ts owned: 26 Touring, 26 RPU, 24 Coupe, 26 Speedster, 28 Chandler, 29 Chandler, 29 A
- Location: Mays Landing, Nj
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- Posts: 7391
- Joined: Sun Feb 14, 2021 10:08 pm
- First Name: Pat
- Last Name: McNallen
- * REQUIRED* Type and Year of Model Ts owned: 1926-7 roadster
- Location: Graham, Texas
- Board Member Since: 2021
Re: Prus High Compression Head bonus
There are several advantages to using the Prus head and related designs. The technology was developed well after the Model T was designed, and I think it would have been adopted widely, sooner, if not for the poor quality gasoline of that era.
Last edited by TXGOAT2 on Wed May 14, 2025 8:40 am, edited 1 time in total.
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- Posts: 700
- Joined: Sun Mar 24, 2019 8:22 pm
- First Name: John
- Last Name: Michaelree
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring 1927 Tudor
- Location: st louis
- Board Member Since: 2010
Re: Prus High Compression Head bonus
Even a standard head can provide adequate engine braking if you are looking ahead. Modern drivers tend to place an over reliance on the vehicles brakes for controlling their speed. That is a plus with a high compression head. Drive it like it has no brakes.
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- Posts: 1230
- Joined: Sun Jan 06, 2019 5:39 pm
- First Name: James
- Last Name: Golden
- * REQUIRED* Type and Year of Model Ts owned: 1926 Model T Roadster
- Location: Bowie, MD
Re: Prus High Compression Head bonus
I bought his last head at Luray.
They were selling like hot cakes there.
If they were not good, they would not sell as good, as the word gets around, like your note will.
They were selling like hot cakes there.
If they were not good, they would not sell as good, as the word gets around, like your note will.
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- Posts: 6609
- Joined: Sun Jan 06, 2019 7:21 pm
- First Name: Allan
- Last Name: Bennett
- * REQUIRED* Type and Year of Model Ts owned: 1912 van, 1917 shooting brake, 1929 roadster buckboard, 1924 tourer, 1925 barn find buckboard, 1925 D &F wide body roadster, 1927LHD Tudor sedan.
- Location: Gawler, Australia
Re: Prus High Compression Head bonus
Absolutely the one best performance improvement product available. The only drawback is you have to create your own Ford script if you want to fool anyone. i used JBweld and an exacto knife to add the script and made in Canada to mine.
Allan from down under.
Allan from down under.