So I just got off the phone with Lyle at DC Performance and he was giddy as a school girl over the track results. He stated that he ran through a few calculations from his Motec training back when he was with Edelbrock. Based on the figures from that training he was told that for every MPH increase in the ET (1/4mi), you should get ~12whp. So Trainman's increase from 110.55 to 113.224 (2.674mph difference) should be equal to 32.09 extra ponies at the wheels! :rock: All from the intake manifold work!
I trust Lyle completely when he stated this, as he has been dragging for years competing in several venues and winning at the Gator's National's event. We were in agreement that you just can't recreate a real world environment on the dyno. So that initial ~10whp/15wtq gain on the dyno has proven to be quite a bit more.
I also did check a few websites that had hp calculators on them and this is what I came up with:
From
http://www.race-cars.net/calculators/et_calculator.html
vehicle weight of 5500lbs, 1/4 mi trap of 110.55 and rear hp is 579.95
vehicle weight of 5500lbs, 1/4 mi trap of 113.224 and rear hp is 623.06
Net gain of 43.11whp
from
http://www.dsm.org/tools/calchp.htm
Vehicle weight at 5500lbs, 1/4mi et of 12.496, and 1/4 trap of 110.55 we get:
Using the ET method, I come up with 557 horsepower
Using the Speed method, I come up with 580 horsepower
Vehicle weight at 5500lbs, 1/4mi et of 12.354, and 1/4 trap of 113.224 we get:
Using the ET method, I come up with 577 horsepower
Using the Speed method, I come up with 623 horsepower
gains of et method: 20hp
gains of speed method: 43hp
from
http://www.dragtimes.com/horsepower-et-trap-speed-calculator.php
1/4 et of 12.496, trap of 110.55, and weight of 5500 we get 568.53 flywheel hp
1/4 et of 12.354, trap of 113.224, and weight of 5500 we get 599.80 flywheel hp
gain of 31.27hp
Not too shabby!