Just wanted to pass along my dyno results on my 1976 F-100. It's a fresh professionally built short block 390 engine with a set of Edelbrock 428 cobra jet heads, Edelbrock performer intake manifold, Edelbrock 1411 750 cfm carb, Melling MTF-4 camshaft, dual exhaust with headers and MSD ignition. I am running a C-6 automatic transmission and a level 2 shift kit. The engine has been dialed-in by a professional shop for max power/performance using premium fuel. A compression test was performed on all cylinders and are operating within specs. The numbers it produced was 230 horsepower at 4750 RPM at the rear wheels and 290 torque at the rear wheels. So my question is, are these numbers good or can I still get more power without going to something more major? The technician doing the dyno pulls stated the C-6 tranmission robs me a lot of the horsepower, about 30% - 40% and a C-4 would produce bigger numbers. The truck has a lot of get-up and go power when driving. He also stated this set-up is good for what I use it for - crusin around and hot-rodding around in. So, with a truck that weighs 4400, are these numbers good and reasonable for my set-up or am I being shorted elsewhere?
That seems about right the C-6 has a ton of drag. My 390 with the np 435 was 347HP and 480 torque at the rear wheels. Because of my knee issue i had to put a C-6 in it from TCI. The new numbers were 301HP and 409 torque. So it is a big loss.
Just wanted to pass along my dyno results on my 1976 F-100. It's a fresh professionally built short block 390 engine with a set of Edelbrock 428 cobra jet heads, Edelbrock performer intake manifold, Edelbrock 1411 750 cfm carb, Melling MTF-4 camshaft, dual exhaust with headers and MSD ignition. I am running a C-6 automatic transmission and a level 2 shift kit. The engine has been dialed-in by a professional shop for max power/performance using premium fuel. A compression test was performed on all cylinders and are operating within specs. The numbers it produced was 230 horsepower at 4750 RPM at the rear wheels and 290 torque at the rear wheels. So my question is, are these numbers good or can I still get more power without going to something more major? The technician doing the dyno pulls stated the C-6 tranmission robs me a lot of the horsepower, about 30% - 40% and a C-4 would produce bigger numbers. The truck has a lot of get-up and go power when driving. He also stated this set-up is good for what I use it for - crusin around and hot-rodding around in. So, with a truck that weighs 4400, are these numbers good and reasonable for my set-up or am I being shorted elsewhere?
Any thoughts on this please.
Thank You
Well lets se if I can pick all this info out one by one?? 30 to 40% is way high for the C6.....28% is about tops with a fresh broke in C6.... and with a medium shift kit in it....you would have a higher pressure in the trans for more of a direct drive.... A Nice rollerized kit could be put in...and drop that down to about 22%..and yes a rollerized C4 is about 18% ...Depending on the build.. A good manual Trans is about 10 to 12% drag loss..
#2..I think the Performer intake sucks.. Its just lighter weight... and I have run Melling Cam in my life in a Brand X motor..and never again...Maybe they have a better profile on them now? I dont know....But I run Comp Cams...for the most part.....
#3.. the Edheads are fine... but with another Intake like the Edlebrock RPM, and a Holley 750....and a little bit of tootsie rolling on the ports to clean up the flash slag...the heads would flow alot better...
#4 you didnt mention what the CR was rebuilt too? Stock? 9 to 1? 10 to 1? There's a hell of alot left in that motor...
#5 So your leaving alot left on the table.....It all depends on how fast you want to go....
#6 So at the mininum at a 30% loss on the tranny...tells me your lossing 69hp from the motor.... at only 230rwhp... So that would only make it a 300hp engine with all the extra's you have put on it...... You have alot more on the table with some parts changing... But On the upside..i do like the MSD.. I just hope like so many other's that dont resist them..you dont burn up the box... JMO....
Time for me to get Flamed now.....LMAO!!!
RJ
__________________
Blue Saphire 70 F250 390/C6 Limited Slip 4.10
Hedman Full length
Holley 750
B&M Mega shifter
Sunpro 5" Super Tach III
ION 138 series wheels
With a Secret BBF/TBA sometime??
That seems about right the C-6 has a ton of drag. My 390 with the np 435 was 347HP and 480 torque at the rear wheels. Because of my knee issue i had to put a C-6 in it from TCI. The new numbers were 301HP and 409 torque. So it is a big loss.
Ok..I rest my case.....straight drive about 10 to 12% and you went to a C6 and dropped 46hp.... 22 to 25%..NOT 30 to 40%.... JMO.... But thats also a truck trans....and we all know the Car Manual's drag less.... JMO..
RJ
__________________
Blue Saphire 70 F250 390/C6 Limited Slip 4.10
Hedman Full length
Holley 750
B&M Mega shifter
Sunpro 5" Super Tach III
ION 138 series wheels
With a Secret BBF/TBA sometime??
Well lets se if I can pick all this info out one by one?? 30 to 40% is way high for the C6.....28% is about tops with a fresh broke in C6.... and with a medium shift kit in it....you would have a higher pressure in the trans for more of a direct drive.... A Nice rollerized kit could be put in...and drop that down to about 22%..and yes a rollerized C4 is about 18% ...Depending on the build.. A good manual Trans is about 10 to 12% drag loss..
#2..I think the Performer intake sucks.. Its just lighter weight... and I have run Melling Cam in my life in a Brand X motor..and never again...Maybe they have a better profile on them now? I dont know....But I run Comp Cams...for the most part.....
#3.. the Edheads are fine... but with another Intake like the Edlebrock RPM, and a Holley 750....and a little bit of tootsie rolling on the ports to clean up the flash slag...the heads would flow alot better...
#4 you didnt mention what the CR was rebuilt too? Stock? 9 to 1? 10 to 1? There's a hell of alot left in that motor...
#5 So your leaving alot left on the table.....It all depends on how fast you want to go....
#6 So at the mininum at a 30% loss on the tranny...tells me your lossing 69hp from the motor.... at only 230rwhp... So that would only make it a 300hp engine with all the extra's you have put on it...... You have alot more on the table with some parts changing... But On the upside..i do like the MSD.. I just hope like so many other's that dont resist them..you dont burn up the box... JMO....
Time for me to get Flamed now.....LMAO!!!
RJ
Totally agree with ya there Russ! Also clean out the bowls on those heads. That will pick up in the CFM department for sure!!!
__________________
Wes Adams FORD428CJ
Built Ford Tuff With Good Ford Stuff
79 F-250 X-Cab 4x4 6.9 Turbo Diesel
64 Falcon X-Ram 428
55 FORD Truck 4-link Rides on air with X-Ram 428
67 Stang 351 C/J
2000 Yamaha V-MAX VMOA#4277
That's insane... arn't they rated around 200hp and high 300ft tq stock truck engine? am i thinking gross hp here?
I guess some might see it as insane and others would think its a drop in the bucket! I love having some power under my right foot!!! LOL I dug up an ole video that I have or I should say a short clip lol
And some thought I was insane for running a solid roller everyday. Even from Oregon to Texas and back in this thing! Kid you not..... http://www.youtube.com/watch?v=Q2dd3PjiV4o
__________________
Wes Adams FORD428CJ
Built Ford Tuff With Good Ford Stuff
79 F-250 X-Cab 4x4 6.9 Turbo Diesel
64 Falcon X-Ram 428
55 FORD Truck 4-link Rides on air with X-Ram 428
67 Stang 351 C/J
2000 Yamaha V-MAX VMOA#4277
Hey Russ, what do you mean a roller kit for the c6? Is that the torrington kit that replaces the thrust washers? I have a stage 2 kit going into the c6 and I plan on adding clutch fibers. Anything else worth doing to get the drag down?
Just wanted to pass along my dyno results on my 1976 F-100. It's a fresh professionally built short block 390 engine with a set of Edelbrock 428 cobra jet heads, Edelbrock performer intake manifold, Edelbrock 1411 750 cfm carb, Melling MTF-4 camshaft, dual exhaust with headers and MSD ignition. I am running a C-6 automatic transmission and a level 2 shift kit. The engine has been dialed-in by a professional shop for max power/performance using premium fuel. A compression test was performed on all cylinders and are operating within specs. The numbers it produced was 230 horsepower at 4750 RPM at the rear wheels and 290 torque at the rear wheels. So my question is, are these numbers good or can I still get more power without going to something more major? The technician doing the dyno pulls stated the C-6 tranmission robs me a lot of the horsepower, about 30% - 40% and a C-4 would produce bigger numbers. The truck has a lot of get-up and go power when driving. He also stated this set-up is good for what I use it for - crusin around and hot-rodding around in. So, with a truck that weighs 4400, are these numbers good and reasonable for my set-up or am I being shorted elsewhere?
Any thoughts on this please.
Thank You
Juice, How much ya got invested in the build, with the custom parts?
John
__________________
In the cool still quiet hours of night, you can hear chevies rusting away.
I too agree with Russ's post (can't believe I said that ) The cam though is an RV type grind and if the comp ratio is in the 9 to 1 range, ought to work well for his combo. As for the HP/TQ output, one thing I wonder is what truck it's in, what tires and wheels are on it ? That to me would also have an effect on the numbers, for instance, having 255/60/15's on aluminum wheels on the rear with a half ton F100, vs 235/75/16's on an F250. The 250's numbers would be a good bit lower than the F100. A bigger cam and bigger intake would move the power up in the rpm range and lift the numbers some, but at the cost of some bottom end torque.(how much though, would depend on the cam chosen) No way I'd even contemplate putting a C-4 behind a 390, unless you just like removing and repairing transmissions.
That seems about right the C-6 has a ton of drag. My 390 with the np 435 was 347HP and 480 torque at the rear wheels. Because of my knee issue i had to put a C-6 in it from TCI. The new numbers were 301HP and 409 torque. So it is a big loss.
Ok now I'm getting worried... I had no idea that the C6 stole that much HP/TQ. I have a C6 in mine now, but it needs to be rebuilt. I bought a Toploader 4 speed and was thinking of changing it over, until everyone said it would be too much trouble. Now I am leaning back towards the straight drive now....
As far as the numbers on your motor go OrangeJuice, the FE reacts very well to head work and intake mods. I like the Edelbrock carb, but some on here don't so use your judgement on that. I will have to agree with these guys on the cam issue and the performer intake. The RPM is a much better intake for a little more money. Melling isn't the best choice in my opinion of coarse. I am a Comp man myself. They make several great cams for a reasonable price and performance range.
All JMO of coarse.... Most of these guys are vets and will steer you in the right direction.
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) The cam though is an RV type grind and if the comp ratio is in the 9 to 1 range, ought to work well for his combo. As for the HP/TQ output, one thing I wonder is what truck it's in, what tires and wheels are on it ? That to me would also have an effect on the numbers, for instance, having 255/60/15's on aluminum wheels on the rear with a half ton F100, vs 235/75/16's on an F250. The 250's numbers would be a good bit lower than the F100. A bigger cam and bigger intake would move the power up in the rpm range and lift the numbers some, but at the cost of some bottom end torque.(how much though, would depend on the cam chosen) No way I'd even contemplate putting a C-4 behind a 390, unless you just like removing and repairing transmissions.
