390 dyno results

390 & up cid Monster Motors
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cairnscomet
Posts: 23
Joined: Tue Jan 19, 2016 9:02 pm
Location: Cairns QLD Australia

390 dyno results

Post by cairnscomet »

I now its not a Mercury but have just done a 2nd dyno run on the 66 390 Ranchero, C6, 9in
1st run a while back ,stock block,heads ,exh manifolds ,Edel RPM intake 750 Edel ,comp cam 268H with comp recommended springs ,187HP @ 4250RPM and max torque 331ftlbs ,16deg in and 36 total timing carby tuned for fuel economy

2nd run all same bar edelbrock alloy heads, slightly higher rate springs as it would valve bounce at 4200 hence peak test 1 ,FPA headers and richen the carby up -240hp@4710rpm and 304ftlbs@3700

would have been good to see differences with heads first the then headers made sense to fit all at once. 50hp does make it feel a lot more livelier
Now to try it out on the new strip just been built here Springmount Raceway
1964 Comet Caliente Convertible 302 4sp
1966 Ford Ranchero 390FE - daily driver
1923 408W T-Bucket

Rocket989
Posts: 1678
Joined: Sat Jan 11, 2014 2:53 pm
Location: Kansas City Metro

Re: 390 dyno results

Post by Rocket989 »

The HP makes sense and is a nice gain...but losing 27ft lbs. of torque?!? Where did torque peak before? Have you tried less total timing (and/ or maybe less initial)?

I don't know much about FE's but I thought I read they like a little less timing and the aluminum heads probably have a more efficient chamber (curious now - have to look) so may not need as much. Did the Eddy heads have the same size combustion chambers?
'cause Johno says you gotta have a sig pic! :)
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popscomet
Posts: 9687
Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: 390 dyno results

Post by popscomet »

Rocket989 wrote:The HP makes sense and is a nice gain...but losing 27ft lbs. of torque?!? Where did torque peak before? Have you tried less total timing (and/ or maybe less initial)?

I don't know much about FE's but I thought I read they like a little less timing and the aluminum heads probably have a more efficient chamber (curious now - have to look) so may not need as much. Did the Eddy heads have the same size combustion chambers?
I bet they have bigger chambers,,,,pop
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cairnscomet
Posts: 23
Joined: Tue Jan 19, 2016 9:02 pm
Location: Cairns QLD Australia

Re: 390 dyno results

Post by cairnscomet »

Yea ,surprised about the torque also , doesn't seem right but have since heard he has installed a new dyno so its probably different set ups .This motor loves inital timing noticble change in response from 10deg up,sure have to run 98 and had to restrict vac advance to to 15 deg to stop cruise ping but runs great . Head chambers are a little bit bigger so have lost a little in compression .
1964 Comet Caliente Convertible 302 4sp
1966 Ford Ranchero 390FE - daily driver
1923 408W T-Bucket

cyclone460
Posts: 118
Joined: Wed May 01, 2013 2:30 pm

Re: 390 dyno results

Post by cyclone460 »

cairnscomet wrote:I now its not a Mercury but have just done a 2nd dyno run on the 66 390 Ranchero, C6, 9in
1st run a while back ,stock block,heads ,exh manifolds ,Edel RPM intake 750 Edel ,comp cam 268H with comp recommended springs ,187HP @ 4250RPM and max torque 331ftlbs ,16deg in and 36 total timing carby tuned for fuel economy

2nd run all same bar edelbrock alloy heads, slightly higher rate springs as it would valve bounce at 4200 hence peak test 1 ,FPA headers and richen the carby up -240hp@4710rpm and 304ftlbs@3700

would have been good to see differences with heads first the then headers made sense to fit all at once. 50hp does make it feel a lot more livelier
Now to try it out on the new strip just been built here Springmount Raceway

cyclone460
Posts: 118
Joined: Wed May 01, 2013 2:30 pm

Re: 390 dyno results

Post by cyclone460 »

cairnscomet wrote:I now its not a Mercury but have just done a 2nd dyno run on the 66 390 Ranchero, C6, 9in
1st run a while back ,stock block,heads ,exh manifolds ,Edel RPM intake 750 Edel ,comp cam 268H with comp recommended springs ,187HP @ 4250RPM and max torque 331ftlbs ,16deg in and 36 total timing carby tuned for fuel economy

2nd run all same bar edelbrock alloy heads, slightly higher rate springs as it would valve bounce at 4200 hence peak test 1 ,FPA headers and richen the carby up -240hp@4710rpm and 304ftlbs@3700

would have been good to see differences with heads first the then headers made sense to fit all at once. 50hp does make it feel a lot more livelier
Now to try it out on the new strip just been built here Springmount Raceway


I really like the 66 rancheros and with a BB 390, thats the greatest! I always wanted to pro street one some day. But,I must be missing somthing? A stock 390 makes around 315 HP and yours was 187 HP?

cairnscomet
Posts: 23
Joined: Tue Jan 19, 2016 9:02 pm
Location: Cairns QLD Australia

Re: 390 dyno results

Post by cairnscomet »

on rolling dyno so HP is at the wheels , the engine is is a bit of an unknown ,just did a compression test and oil presure test ,pulled heads ,a couple of new exhaust valves and re lapped seats ,new valve stem seals ,comp 268 cam lifters manifold and Edelbrock carb and 187Hp

now if I can sort this backfire out I will be happy again
1964 Comet Caliente Convertible 302 4sp
1966 Ford Ranchero 390FE - daily driver
1923 408W T-Bucket

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