Guess the horsepower game....

[blykins]

I'll be dyno'ing a TFS headed 390 on the 14th of this month. 

Specs:

*4.080" bore, block bored/honed with torque plates, square decked with BHJ fixture, align honed with ARP studs
*Factory 391 crankshaft, with shaped counterweights, BBC rod journals, stock stroke
*Scat 6.800" I-beam rods
*Racetec forged flat top pistons, with Hastings 1.5/1.5/3mm piston rings, compression ratio ~10.4:1
*TFS cylinder heads, assembled with Comp beehive springs, tool steel retainers
*Factory non-adjustable rockers with POP stands and end stands
*Performer RPM intake with some plenum and divider work
*Quick Fuel Q-850 carburetor
*Cam is one of my custom hydraulic rollers, 240/243 @ .050", .555"/.580" lift, 109 LSA on a 103 ICL, with Morel lifters.
*Running a Canton rear sump pan, MSD distributor, blah blah blah
*Cylinder heads measured at 169.8cc intake port volume, 69.8cc chambers, flowed 233/164 @ .300", 317/215 @ .500", 333/220 @ .600"
*Will be turning water pump and alternator

I did end up having to cut .200" off the bottoms of the stands for the non-adjustable rockers, in order to get the geometry correct. 



And a shot of my favorite helper screwing in the spark plugs....



Ok, so for the rules of the game....

Closest without going over on horsepower wins.  I will be posting UNCORRECTED horsepower.  Winner gets some Lykins Motorsports schwag....probably a decal and a T-shirt or something. 

[428 GALAXIE]

468 horses 495 torq.

I like these quessing games.

[chilly460]

525hp @ 6300

Very interesting build, to me, for a few reasons:
1) Have tons of 445 with BBM/Survival/Ported Ebrocks and a hydraulic roller to compare it to
2) Comparisons to 393/408 small blocks with good AFR or other CNC heads, for the Cobra guys

[e philpott]

Will the Alternator belt be tight or loose ??
Is this the high rpm hydraulic you talked about earlier ??

558 HP is my swag for swag

Uncorrected 530 hp , I got faith in ya Brent !

[machoneman]

539 hp here! 

[mn67]

475 @6100,  500tq

[Drew Pojedinec]

500 even.



And it that your daughter?  Dang man, she was born just a lil while ago. We getting old.

[cjshaker]

Without going over? Is this the Price Is Right?
I wouldn't mind having a free shirt, so I'll take a stab at it.

460 is my guess.

[blykins]

Will the Alternator belt be tight or loose ??
Is this the high rpm hydraulic you talked about earlier ??

558 HP is my swag for swag

This is not the high rpm one, although this one will probably get up there a little bit. 

BTW, the game is for *uncorrected* horsepower, not corrected.  Ain't no way this thing will make 558 uncorrected.  I'll let you change your answer. 

[blykins]

500 even.



And it that your daughter?  Dang man, she was born just a lil while ago. We getting old.

We are getting old man. 

She turned 6 last month.

[sixty9cobra]

482

[chilly460]

Will the Alternator belt be tight or loose ??
Is this the high rpm hydraulic you talked about earlier ??

558 HP is my swag for swag

This is not the high rpm one, although this one will probably get up there a little bit. 

BTW, the game is for *uncorrected* horsepower, not corrected.  Ain't no way this thing will make 558 uncorrected.  I'll let you change your answer. 

Brent, you build quite a few small blocks as far as I understand so I'll ask.  A 393/408 with heads that flowed same as the TFS would likely do 550-575 with this cam, there are so many of them out there it's a cookie cutter recipe by now.  Why do you feel the 390 would be down from there?   If you put a Victor on it, do you think it would gain up top?  I know the Victor likely wouldn't pull ahead til 5500 or 6000 on a 390, but for seems they help 20hp or so on the 445s that go to 6500 if a guy is willing to give up the low/midrange.

I'm not putting the FE down at all, just trying to solve the riddle of where the bottleneck is.  My guess is the transition from intake/intake port drops flow, but I have zero data to back it up. 

[Lenz]

490

[blykins]

Will the Alternator belt be tight or loose ??
Is this the high rpm hydraulic you talked about earlier ??

558 HP is my swag for swag

This is not the high rpm one, although this one will probably get up there a little bit. 

BTW, the game is for *uncorrected* horsepower, not corrected.  Ain't no way this thing will make 558 uncorrected.  I'll let you change your answer. 

Brent, you build quite a few small blocks as far as I understand so I'll ask.  A 393/408 with heads that flowed same as the TFS would likely do 550-575 with this cam, there are so many of them out there it's a cookie cutter recipe by now.  Why do you feel the 390 would be down from there?   If you put a Victor on it, do you think it would gain up top?  I know the Victor likely wouldn't pull ahead til 5500 or 6000 on a 390, but for seems they help 20hp or so on the 445s that go to 6500 if a guy is willing to give up the low/midrange.

I'm not putting the FE down at all, just trying to solve the riddle of where the bottleneck is.  My guess is the transition from intake/intake port drops flow, but I have zero data to back it up.

I build a lot of small blocks too , but it takes a healthy 393/408 small block to make 575 hp.  FWIW, a 408C with 208cc 3V CHI heads with a 248/254° .680" lift solid roller will make about 600 hp here.   My 408C's with 3V heads and hydraulic rollers will be around the 525-550 hp mark. 

I don't expect the 390 to be anywhere near that.

I *really* shaped the divider of that Performer RPM and spent quite a bit of time on it.  I feel that it's really the most optimal intake for this combination, unless it was maybe a ported Port-o-sonic or a Street Master.  I will most likely try a 1" and a 2" Super Sucker on the dyno. 

Here's how the Performer RPM port opening matched up with the TFS port opening after a little work and some flange milling:

[chilly460]

Sorry, realized I worded that poorly.  I wasn't referring to port match, I was looking at how FEs basically have a large continual curve to the intake tract.  My hunch is that the flow numbers for the heads are good, but bolt up the intake and the overall flow drops more than a small block (assuming the intake is good as well and is not the bottleneck).  Again, no data there, just the only bottleneck I can think of would be the intake tract turning as a whole. 

Don't want to get too far with this discussion as it feels negative when that's not the intent, focusing on the opportunity to have OOTB CNC'd heads for the FE to play with.  Hope this 390 kicks ass.