SBC 427 Dyno Friday HP guesses
10-31-2014, 12:20 PM
#41
Drifting
We can make more power in your mill with a smaller cam. Your leaving torque and HP on the table.
10-31-2014, 01:32 PM
#42
Safety Car
I am also fuel injected
I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
DO MA NEU!
10-31-2014, 01:40 PM
#43
Safety Car
My back-to-back tests came out at 22% loss, but with a TH400 auto trans......maybe Motorhead's losses included other factors....exhaust, rear end, tires, accessories, which may be more than average.
10-31-2014, 01:57 PM
#44
Race Director
23% of 650hp is 150hp
22% of 650hp is 143hp
i show 510hp at the rear wheels.... so, ether way, I'm right around 650hp...
There have been more back to back's other than Wayne's (Moterhead) and they have also come up with the 20-25% loss numbers... our IRS rear-end eats power as well...
And the modern automatic transmissions are very good as far as power loss goes,,, not like the old th400's and the like
22% of 650hp is 143hp
i show 510hp at the rear wheels.... so, ether way, I'm right around 650hp...
There have been more back to back's other than Wayne's (Moterhead) and they have also come up with the 20-25% loss numbers... our IRS rear-end eats power as well...
And the modern automatic transmissions are very good as far as power loss goes,,, not like the old th400's and the like
10-31-2014, 05:23 PM
#45
Race Director
10-31-2014, 06:21 PM
#47
Race Director
10-31-2014, 08:50 PM
#50
Safety Car
Thread Starter
I been so busy all day .. I have the results ..
584 hp @ 6000
567 Tq @ 4700
584 hp @ 6000
567 Tq @ 4700
10-31-2014, 09:03 PM
#53
Safety Car
Thread Starter
10-31-2014, 09:30 PM
#54
Race Director
10-31-2014, 09:52 PM
#55
Safety Car
Thread Starter
I am not sure that sheet was sent by Chris not the engine builder . There are a few pointers I was made aware of that will make a difference in the power so I have a few questions to ask and I need a good oil pan. I also think my headers are bigger the those used on the dyno and I have a better fuel delivery system making me able to run leaner up top.
It was at 12.7 A/F @6000 I can adjust those A/F tables which should also add to the power.
It was at 12.7 A/F @6000 I can adjust those A/F tables which should also add to the power.
10-31-2014, 11:00 PM
#56
Le Mans Master
Solid numbers!
They should have pulled it higher, it may have made more... BSFC looked pretty good... Should go bottom 11s in a C3... Gonna be a blast...
I hope the drivetrain has good stuff..
They should have pulled it higher, it may have made more... BSFC looked pretty good... Should go bottom 11s in a C3... Gonna be a blast...
I hope the drivetrain has good stuff..
10-31-2014, 11:05 PM
#57
Race Director
Hmmmm this is fun.... Ok... Here are the differences I see... I am at 11:1 compression, my 220's are competition ported, I am fuil injected with controlled timing and AF... And a windage screen...
I was 510hp at the rear wheels in a tko600... Which would put me at say around 650max.... So, I'm going to say 585:-). I think the .5 cr and the head work is the major factor
I was 510hp at the rear wheels in a tko600... Which would put me at say around 650max.... So, I'm going to say 585:-). I think the .5 cr and the head work is the major factor
Guess my guess was pretty much dead nuts on
Last edited by pauldana; 10-31-2014 at 11:46 PM.
