Dyno Results - 454

[1968SWBBigBlock]

For any of you that have been on the fence or wondered about running your motor on a dyno, this was a great experience. We could monitor oil pressure and temp, coolant temp, Air/fuel ratio per cylinder, fuel usage between front and back bowls.
We broke the motor in on the dyno and we watched as the oil temp climbed 240 degrees, to hot to be comfortable, so we shut the motor down to let it cool - not a comfortable moment while breaking in a new camshaft - but something I would have never seen if I broke in the cam in my truck
After breakin the oil temps came into line - it can be as simple as a little to much oil in the sump to cause the temps to go up.
Dyno pulls & tuning by Platinum Engine and dyno services, Norwich Ohio, machine work by Watson & Ruppel performance, Sarahsville Ohio
All results are corrected per sttp standards
3300 = 306.5hp x 487.8TQ
4000 = 387.7hp x 509.1 TQ
4400 = 447.0HP x 533.6 TQ
4700 = 465.9HP x 520.6 TQ
5200 = 484.9 HP x 489.8 TQ
5400 = 467.9 HP x 455.1 TQ
MAX = 484.9 HP x 533.6 TQ

454
.040 over bore = 463CI
Edelbrock Performer RPM ported and gasket matched to heads
1” phnolic spacer plate
770 Holley SA carb
MSD Street Fire HEI Distributor
1.7/8” headers with 3” collectors
Comp Cams roller tip rockers
Comp Cams 924 springs
Comp Cams 10 degree retainers
Comp Cams 3/8” Hi Tech pushrods, .080 Wall
Comp Cams Guide Plates
2.19 Intake x 1.88 Exhaust valves – sst
781 Heads ported and gasket matched to intake decked & cc’ed to achieve 10.0-1 compression, competition valve job with blended bowls, bronze guides, cut for high lift camshaft,
KB FHR Forged pistons with .200 dome = 10.0-1 compression with decked head and block, uses the heavier ring pack
Hastings Moly Rings
Pistons are floated on pins
Stock rods with ARP wave loc bolts
Cast Crank – stock turned 10-10, Bearing clearance .0024 Avg.
ARP main bolts- 2 bolt main
Melling M77 oil pump with heavy spring
ARP oil pump studs
Lunati 60204 camshaft set up at 105.250 degrees, nitrided for extra hardness
.554 x .572 lift & 276 x 284 Advertised Duration
Microtrol lifters
Grooved lifter bores for better camshaft oiling
Rotating assembly is spin balanced to within 1 gram
Block was decked, honed with torque plates to .040, & line bored
15W-40 Lubriplate GPO motor oil
GM EOS
Moroso 7 Qt oil Pan & pickup

[redhead69]

Thats a nice stout motor! Should throw you back real hard, congrats

[1968SWBBigBlock]

Thanks - I had a lot of fun thru this learning curve. My engine builder and I spent many hours discussing parts and changes - Dave was very open to what I had to say but quick to stop me if I was looking at some part he had bad luck with in the past.
For me an engine builder with lots of experience and patience was needed. I like to learn and have input thru the entire process.

[steelhorse]

Thats a nice flat torque curve there.Powere where you need it to not all up top

[clay68c10]

Nice numbers. I put mine on the chassis dyno a while back, it's cool to actually have some proven numbers. You gotta love that flat BBC torque curve.

[chevy72blu]

Nice man! I think my numbers would look very similar based on your build sheet, + a bit for the extra cubes. Im sure you're happy with it!

I've thought and thought and thought about dynoing it, but honestly, I really cant afford it for a while and the thing is haunting me. I wont be able to start it until I come back to town a month or two from now anyway though, and maybe it will be different. I just dont want to go back through the hastle of un bolting, picking, and rebolting it all back together.

Why was your oil temp so high?

[1968SWBBigBlock]

We are unsure why the oil temps climbed during breakin.
He said it could be as little to much oil in the oil pan, the crank starts whipping up the oil in the pan and creates the additional heat
I changed the filter when we swapped springs, I only filled the filter up 1/2 way to shed some oil and it seemed to work, we never saw the high oil temp again.
When I built the motor I choose not to install a windage tray, from what I read if you are trying to keep a flat tappit cam alive you want as much oil flying around as you can, "to much oil control on the street can be a bad thing on a street motor"
David Reher - Reher-Morrison racing engines