Built GT350 guesses

[Keagan]

Waiting on my new engine to show up and looking for guesses on horsepower numbers.

Build is still N/A 5.2l FPC platform

12.8:1 Compression
Frankenstein Ported Heads
Longtube Catless Headers
JLT intake
1050x Injectors
One Ethanol e85R
Lund Tune

Once break in is through I'll post dyno numbers.

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[JetGray_Mach1]

Damn!! I am more interested in the sound of that beast! High revving NA monster that will be. I bet it will be 600ish WHP.

 

[JetGray_Mach1]

What is the cost of such a build?

 

[Keagan]

Damn!! I am more interested in the sound of that beast! High revving NA monster that will be. I bet it will be 600ish WHP.

Yeah it will rev out to 8800 safely according to the engine builder!

I already had the longtubes, the entire bottom end is new. They are sending my heads off to be ported so i am reusing those. Ill attach the total specs down below.

Cost is around $15k-ish for all parts and labor.

RPG Racing Engine
New Ford Gen 3 Voodoo 5.2L Block
– Block is Line honed, decked and Honed with Dual Torque
Plates.
– New Ford GT350 5.2L flat-Plane Crankshaft, Micro
polished.
– RPG Specific Pistons 3.701" Bore 12.8:1CR
– Manley/ Oliver I Beam Connecting Rods with ARP2000
Bolts
– Total Seal Piston Rings
– Clevite Coated Rod and Main Bearings
– ARP Main Studs and Side Bolts

Frankenstein Ported Heads
PAC-1281X Valve Spring Upgrade
Boundary Billet Black Series/Ported OPGs and Boundary
Grip Timing Sprocket
2015+ GT350 Balance Tubes for full oil flow between
Cylinder heads and Coolant Cross over line between Cylinder Heads
Stainless Works Headers
ID 1050x Injectors
JLT Intake

 

[JetGray_Mach1]

Yeah it will rev out to 8800 safely according to the engine builder!

I already had the longtubes, the entire bottom end is new. They are sending my heads off to be ported so i am reusing those. Ill attach the total specs down below.

Cost is around $15k-ish for all parts and labor.

RPG Racing Engine
New Ford Gen 3 Voodoo 5.2L Block
– Block is Line honed, decked and Honed with Dual Torque
Plates.
– New Ford GT350 5.2L flat-Plane Crankshaft, Micro
polished.
– RPG Specific Pistons 3.701" Bore 12.8:1CR
– Manley/ Oliver I Beam Connecting Rods with ARP2000
Bolts
– Total Seal Piston Rings
– Clevite Coated Rod and Main Bearings
– ARP Main Studs and Side Bolts

Frankenstein Ported Heads
PAC-1281X Valve Spring Upgrade
Boundary Billet Black Series/Ported OPGs and Boundary
Grip Timing Sprocket
2015+ GT350 Balance Tubes for full oil flow between
Cylinder heads and Coolant Cross over line between Cylinder Heads
Stainless Works Headers
ID 1050x Injectors
JLT Intake

8800! Wow that’s lovely.

Thanks for the breakdown! that’s a great price!

 

[Blwnsmoke]

Just curious on this.. "New Ford Gen 3 Voodoo 5.2L Block"

Since when has there been a Gen 3??

 

[honeybadger]

Yeah it will rev out to 8800 safely according to the engine builder!

I already had the longtubes, the entire bottom end is new. They are sending my heads off to be ported so i am reusing those. Ill attach the total specs down below.

Cost is around $15k-ish for all parts and labor.

RPG Racing Engine
New Ford Gen 3 Voodoo 5.2L Block
– Block is Line honed, decked and Honed with Dual Torque
Plates.
– New Ford GT350 5.2L flat-Plane Crankshaft, Micro
polished.
– RPG Specific Pistons 3.701" Bore 12.8:1CR
– Manley/ Oliver I Beam Connecting Rods with ARP2000
Bolts
– Total Seal Piston Rings
– Clevite Coated Rod and Main Bearings
– ARP Main Studs and Side Bolts

Frankenstein Ported Heads
PAC-1281X Valve Spring Upgrade
Boundary Billet Black Series/Ported OPGs and Boundary
Grip Timing Sprocket
2015+ GT350 Balance Tubes for full oil flow between
Cylinder heads and Coolant Cross over line between Cylinder Heads
Stainless Works Headers
ID 1050x Injectors
JLT Intake

Remind me again, are you reusing stock cams? and stock intake manifold?

 

[Keagan]

Just curious on this.. "New Ford Gen 3 Voodoo 5.2L Block"

Since when has there been a Gen 3??

It’s the Gen 3 5.2. The 5.2 they use in the 500s but just with the flat plane crank. Little better Design and improved cooling jackets I believe

 

[Keagan]

Remind me again, are you reusing stock cams? and stock intake manifold?

Yessir for now, was on the fence with L&M came and I might still try them down the road. Same goes for the intake. Wasn’t sure if it was worth upgrading as the stock one I’ve heard is great.

what’s your opinion on this?

 

[honeybadger]

Yessir for now, was on the fence with L&M came and I might still try them down the road. Same goes for the intake. Wasn’t sure if it was worth upgrading as the stock one I’ve heard is great.

what’s your opinion on this?

I think you'll struggle to get the RPM above 8200 with stock cams. At least that was my experience - we dropped power over 8k enough to make it pretty worthless to turn any higher than 8200 (I had a very similar build sheet to you - stock cams and intake, catless headers, built bottom end, ported/polished heads, etc.).

I'll guess you're around 540whp depending on dyno and conditions and timing.

With cams and CJ intake, I'll bet 560 is doable and you'll keep power from 8k and up.

If you're going for RPM and power, def add the cams and CJ

Should note -my guesses are for a road race tune (which are more conservative than a max effort tune)

 

[sublime1996525]

I’m guessing around 540-550whp. I also agree with HB, you won’t sound much past 8,200 with stock cams.

 

[ecoboost321]

Waiting on my new engine to show up and looking for guesses on horsepower numbers.

Build is still N/A 5.2l FPC platform

12.8:1 Compression
Frankenstein Ported Heads
Longtube Catless Headers
JLT intake
1050x Injectors
One Ethanol e85R
Lund Tune

Once break in is through I'll post dyno numbers.

Looks like an awesome build and project ! Just curious, is this going to be for a track only car, or will you be keeping accessories like AC etc with this new motor ? Curious on whether the accessory drive belt and alternator good for RPMS above the stock 8250 limit.

 

[EFI]

Wasn’t sure if it was worth upgrading as the stock one I’ve heard is great.

They are fine for 8,250rpm, not so much for nearly 9,000.

Kinda odd to spend $15,000 on an all out high revving N/A build to keep the stock cams, even more odd to wait and upgrade the cams after the engine is all together and put in the car.

 

[Keagan]

They are fine for 8,250rpm, not so much for nearly 9,000.

Kinda odd to spend $15,000 on an all out high revving N/A build to keep the stock cams, even more odd to wait and upgrade the cams after the engine is all together and put in the car.

RPG stated it wasn't necessary and the cam profiles in these cars are great. My justification is that it always seems like youre riding a fine line with "upgrading" these cars. As some things hurt more then help. @honeybadger can attest I'm sure. Not that cams would hurt, just still sit on the hill of "if its not broke dont fix it". As stated it wasnt my inital plan but that doesnt mean it cant stil happen. Thats what these discussions are for

 

[Keagan]

Looks like an awesome build and project ! Just curious, is this going to be for a track only car, or will you be keeping accessories like AC etc with this new motor ? Curious on whether the accessory drive belt and alternator good for RPMS above the stock 8250 limit.

I plan on keeping them for now. I'll be doing a bunch of duct work/cooling this winter and I'm sure ill be bothered by the condenser and that will be enough justification to get rid of the A/C all together. I do like driving it on the street too lol

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