Finally dyno tested #3482
The dyno operator was surprised at how much power it made.
Mike
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Sweet!
At the wheels, correct?
congrats.
-G
congrats.
-G
Before we went to the Dynojet chassis dyno, I simulated Mike's engine
in Dynomation so I happen to have the relevent info on hand. Mike's
engine is a 393C (4.03" bore by 3.85" stroke Scat kit with Probe flat
top pistons, 11:1 on 92 octane) with unported CHI-4V heads, equalized
Blue Thunder dual plane intake, QFT 750 carb, a cam of specs:
239/244 (268/273) degrees dur. 0.605"/0.588" lift (less 0.018" lash), 108 LSA
GTS headers with these mufflers:
http://pantera.infopop.cc/eve/...562/m/4850059725/p/1
They are Cherry Bomb Extreme mufflers (p/n 545-7425, single 2 1/2"
inlet, dual 2 1/4" outlet) with Hooker tips (p/n 520-22202, 2 1/2" X 3").
The pipes are Dynomax 2" mandrel J bends (p/n 289-42310) cut to fit.
Each muffler has a removable insert in each tip. The inserts are packed
with ATV/Motorcycle muffler packing. Though Mike had two remaining
pulls we only dyno'd them with the inserts as I forgot they were removable.
The engine was also equipped with this paper element air cleaner:
http://pantera.infopop.cc/eve/...562/m/2010056465/p/1
> The dyno operator was surprised at how much power it made.
After the first pull, the dyno operator said "Well, I didn't expect that."
I opened my laptop with Mike's engine modeled in Dynomation and said "I did".
Dynomation has a mode that simulates a chassis dyno and it predicted 417 rear
wheel HP. If we'd remembered to remove the exhaust tip inserts, I'd bet it
would have been very close. Dynomation estimates the engine in the 525 HP
range at the crank.
> At the wheels, correct?
Yes. By way of comparison, a 5.4L Supercharged Shelby GT500 (stock except
for a K&N air filter set-up) made 392 RWHP.
Dan Jones
in Dynomation so I happen to have the relevent info on hand. Mike's
engine is a 393C (4.03" bore by 3.85" stroke Scat kit with Probe flat
top pistons, 11:1 on 92 octane) with unported CHI-4V heads, equalized
Blue Thunder dual plane intake, QFT 750 carb, a cam of specs:
239/244 (268/273) degrees dur. 0.605"/0.588" lift (less 0.018" lash), 108 LSA
GTS headers with these mufflers:
http://pantera.infopop.cc/eve/...562/m/4850059725/p/1
They are Cherry Bomb Extreme mufflers (p/n 545-7425, single 2 1/2"
inlet, dual 2 1/4" outlet) with Hooker tips (p/n 520-22202, 2 1/2" X 3").
The pipes are Dynomax 2" mandrel J bends (p/n 289-42310) cut to fit.
Each muffler has a removable insert in each tip. The inserts are packed
with ATV/Motorcycle muffler packing. Though Mike had two remaining
pulls we only dyno'd them with the inserts as I forgot they were removable.
The engine was also equipped with this paper element air cleaner:
http://pantera.infopop.cc/eve/...562/m/2010056465/p/1
> The dyno operator was surprised at how much power it made.
After the first pull, the dyno operator said "Well, I didn't expect that."
I opened my laptop with Mike's engine modeled in Dynomation and said "I did".
Dynomation has a mode that simulates a chassis dyno and it predicted 417 rear
wheel HP. If we'd remembered to remove the exhaust tip inserts, I'd bet it
would have been very close. Dynomation estimates the engine in the 525 HP
range at the crank.
> At the wheels, correct?
Yes. By way of comparison, a 5.4L Supercharged Shelby GT500 (stock except
for a K&N air filter set-up) made 392 RWHP.
Dan Jones
Dan or Mike
Two questions about the camshaft. Is the camshaft a flat tappet grind or a roller cam? What's the intake lobe center line set at?
I'm just wanting to educate myself a bit. Thanks
-G
Two questions about the camshaft. Is the camshaft a flat tappet grind or a roller cam? What's the intake lobe center line set at?
I'm just wanting to educate myself a bit. Thanks
-G
George,
Its a solid lifter cam. The lifters have an oil hole in the bottom, Comp #817-16 Bee hive springs, Comp #26918-16 for a GM LS1
As far as lobe center line...104 degrees
Mike
Its a solid lifter cam. The lifters have an oil hole in the bottom, Comp #817-16 Bee hive springs, Comp #26918-16 for a GM LS1
As far as lobe center line...104 degrees
Mike
Those are nice results. That should move the p-car nicely.
Blaine
Blaine
Thanks Blaine, I bet it doesnt move like a turbo tho 
Maybe not up top, but that's a helluva lot friendlier and fun torque curve.