bravenrace
Member
Okay, I've designed my 347 using my Engine Analyzer program along with other research and some harsh realities. I've bought some parts and have some yet to buy. The parts I already have are pretty much carved in stone, so no changes are going to be made there, but the parts that I have picked out and not yet purchased are open for discussion, along with any building tips and tricks.
First, this is for my '65 Mustang with a T-5 and a 3.80 trac loc rear with 27" tall tires. While my priority is open track use, the reality is that it will get a lot more street miles than track. I've built many engines in the past, but it's been decades since I've built a SBF, so any suggestions specific to this engine are appreciated. I don't really need to know generalities of engine building. Been there, done that.
Okay, the engine. This is what I have so far:
- '87 5.0 block machined for 347
- Eagle balanced rotating assembly with cast crank, I-beam rods and forged pistons with standard valve reliefs
- Crane 1.6 ratio roller rockers
- Edelbrock Air Gap manifold
- Hedman Elite headers and Magnaflow 2.5" exhaust.
The items above are pretty much written into stone at this point, save the rocker and maybe the intake. Heads, cam, carb, ignition are all open. My plan, based on the program and research, was originally to use AFR 165 heads and a Comp XE274HR cam, which seemed to work the best on the program and was also the recommendation that Comp made. The carb is a Holley 650 double pumper.
Now, here's the thing. Trick Flow is headquartered in my home town and I know some of the guys there. So instead of the above combo I've decided to use TFS track heat 170 heads with 58cc chambers and a TFS stage 2 cam. This combo only gives up very little to the AFR-CC combo and is about $600 cheaper. And I get to support a local company. The one down side is that to use the TFS heads, I'll want to return my standard pistons and get the pistons with the correct valve reliefs, but that's not a big problem.
On the computer this combination provides 420hp@6000RPM/405lb-ft@4500RPM, and 300hp/364lb-ft averages from 2000-6500RPM. This is at SAE standard conditions, not dyno standards. By replacing the intake rockers with 1.7 ratio, these numbers are within a tick of what I got with the original combination.
If these numbers are reasonably accurate, then this is plenty of power for me, but I want to run this by you guys anyway. So, what say you?
First, this is for my '65 Mustang with a T-5 and a 3.80 trac loc rear with 27" tall tires. While my priority is open track use, the reality is that it will get a lot more street miles than track. I've built many engines in the past, but it's been decades since I've built a SBF, so any suggestions specific to this engine are appreciated. I don't really need to know generalities of engine building. Been there, done that.
Okay, the engine. This is what I have so far:
- '87 5.0 block machined for 347
- Eagle balanced rotating assembly with cast crank, I-beam rods and forged pistons with standard valve reliefs
- Crane 1.6 ratio roller rockers
- Edelbrock Air Gap manifold
- Hedman Elite headers and Magnaflow 2.5" exhaust.
The items above are pretty much written into stone at this point, save the rocker and maybe the intake. Heads, cam, carb, ignition are all open. My plan, based on the program and research, was originally to use AFR 165 heads and a Comp XE274HR cam, which seemed to work the best on the program and was also the recommendation that Comp made. The carb is a Holley 650 double pumper.
Now, here's the thing. Trick Flow is headquartered in my home town and I know some of the guys there. So instead of the above combo I've decided to use TFS track heat 170 heads with 58cc chambers and a TFS stage 2 cam. This combo only gives up very little to the AFR-CC combo and is about $600 cheaper. And I get to support a local company. The one down side is that to use the TFS heads, I'll want to return my standard pistons and get the pistons with the correct valve reliefs, but that's not a big problem.
On the computer this combination provides 420hp@6000RPM/405lb-ft@4500RPM, and 300hp/364lb-ft averages from 2000-6500RPM. This is at SAE standard conditions, not dyno standards. By replacing the intake rockers with 1.7 ratio, these numbers are within a tick of what I got with the original combination.
If these numbers are reasonably accurate, then this is plenty of power for me, but I want to run this by you guys anyway. So, what say you?