Erson cam question
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Laughing Gas
Joined: Aug 2020
Posts: 821
Likes: 292
From: Pelham Alabama
Erson cam question
Guys first time here on the SB ford page.
I picked up a 86 302 roller engine which someone built up long ago.
This engine has been sitting for many years in a shop.
When I tore it down I was supprised at what good shape it was in.
Clean bore
H 606 dish pistons
and the Erson cam
Here is the question:
Cam markings on end are RH 288 - 320 RH 294 - 320 1124 lc # 4595 and 8-98
Are any of you familar with Erson numbering. I did reach out to Paul Muller but he was not have the RH cam info..
Want to drive this on street, around town but like low end torque,
Will this cam be tooo radical for this project
Oh yea,, goin in a 1964 Falcon Sprint Convertible.
Thank you, Alex
I picked up a 86 302 roller engine which someone built up long ago.
This engine has been sitting for many years in a shop.
When I tore it down I was supprised at what good shape it was in.
Clean bore
H 606 dish pistons
and the Erson cam
Here is the question:
Cam markings on end are RH 288 - 320 RH 294 - 320 1124 lc # 4595 and 8-98
Are any of you familar with Erson numbering. I did reach out to Paul Muller but he was not have the RH cam info..
Want to drive this on street, around town but like low end torque,
Will this cam be tooo radical for this project
Oh yea,, goin in a 1964 Falcon Sprint Convertible.
Thank you, Alex
Cargo Master
Joined: Oct 2020
Posts: 2,657
Likes: 777
RH288/.320 is 214 @ .050 with .320 lobe lift. RH 294/.320 is 226 @ .050 also with ..320 lobe lift according to my old Erson catalog. A LOT of cam for a 302 but it is going into a Falcon. Most of the time I like to see about 205-210 or so at .050 on about a 108 for an engine like this. . That other number 1124 might mean a 112 lobe sep with 4 degrees of advance.
Cargo Master
Joined: Oct 2020
Posts: 2,657
Likes: 777
In my opinion smaller engines like a Ford 289, 302 Chevy 283, 305 etc are very easy to over cam. In most applications they tend to need all the bottom end torque they can get and it doesn't take very much duration to start hurting that in exchange for a little bit more top end power. That cam will work ok but I think that it has about 10 degrees more duration than what it needs.
I built several 289 engines for a local Mustang shop and most of the time they would use them in front of a 5 speed manual with an overdrive in a 65 Mustang. I was always worried that it would want to chug a lug at low rpm in high gear. The cam I would use was 205 /214 @.050 on a 108 lobe sep. This worked great and it sounded just a little bit tuned up vs a stock 289. With a 4 barrel and a set of headers they would make 275 horsepower.
With that said, you already have the cam so you might want to give it a try. If you're not happy with the performance it would be easy to regrind it.
I built several 289 engines for a local Mustang shop and most of the time they would use them in front of a 5 speed manual with an overdrive in a 65 Mustang. I was always worried that it would want to chug a lug at low rpm in high gear. The cam I would use was 205 /214 @.050 on a 108 lobe sep. This worked great and it sounded just a little bit tuned up vs a stock 289. With a 4 barrel and a set of headers they would make 275 horsepower.
With that said, you already have the cam so you might want to give it a try. If you're not happy with the performance it would be easy to regrind it.
Moderator
Joined: Aug 2002
Posts: 6,099
Likes: 380
From: Southern California
Here's what I pulled up.............
The Epson RH 288 - 320 camshaft specifications include:
Lobe Lift: 0.320 inches. Compression Ratio: At least 9.5:1. Applications: Suitable for small block engines, particularly in passenger cars and light trucks.
Performance: Designed for good mid-range power and throttle response, with a smooth idle.
Sounds perfect for the SBF!!!!!!!!!!!!
The Epson RH 288 - 320 camshaft specifications include:
Lobe Lift: 0.320 inches. Compression Ratio: At least 9.5:1. Applications: Suitable for small block engines, particularly in passenger cars and light trucks.
Performance: Designed for good mid-range power and throttle response, with a smooth idle.
Sounds perfect for the SBF!!!!!!!!!!!!
Cargo Master
Joined: Oct 2020
Posts: 2,657
Likes: 777
Here's what I pulled up.............
The Epson RH 288 - 320 camshaft specifications include:
Lobe Lift: 0.320 inches. Compression Ratio: At least 9.5:1. Applications: Suitable for small block engines, particularly in passenger cars and light trucks.
Performance: Designed for good mid-range power and throttle response, with a smooth idle.
Sounds perfect for the SBF!!!!!!!!!!!!
The Epson RH 288 - 320 camshaft specifications include:
Lobe Lift: 0.320 inches. Compression Ratio: At least 9.5:1. Applications: Suitable for small block engines, particularly in passenger cars and light trucks.
Performance: Designed for good mid-range power and throttle response, with a smooth idle.
Sounds perfect for the SBF!!!!!!!!!!!!
Thread Starter
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Laughing Gas
Joined: Aug 2020
Posts: 821
Likes: 292
From: Pelham Alabama
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Moderator
Joined: Aug 2002
Posts: 6,099
Likes: 380
From: Southern California
all depends on what tranny and diff gears.................. tall gears/big tires/automatic...yes, too much, manual trans, 3:25-3:75 gears, it will run well..... I'm running in my 65 stang, 289...a 290 duration, 520+ lift on 144 centerline...... 2.80 gears and ultra close ratio 4 speed..... second gear accel is almost to the point of being brutal
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