Don Terrill’s Speed-Talk

by Rick! » Tue Apr 16, 2024 7:52 am For the OP, here's a screenshot from an ET Predictor based on Pat Hale's Performance Racing Atmosphere calculations. (a modified version of SAE J1349) I believe Larry's program uses Pat's CF calculations. I also use some formulas off of epi-eng.com for water vapo...

Larry, What are you using for Cd and FA? I long time ago I found somewhere on the internet. 70 Chevelle .42 Cd 25.52 FA Stan i did a very quick Simulation for Mark's 650 HP ... i didn't fine-tune it or nit-pick it however, i came out pretty close to reality :) VortecPro_DragCoefficient_FrontalArea....

.... this would be an "Ideal Run" that would show 650 Peak HP with a very flat TQ and HP Curve
something to shoot for !
 

RCJ wrote: ↑Sat Apr 13, 2024 5:02 pm Page 2 about 1/3 of the way down, there is a picture of an exhaust port with expoy in it. I have a set of heads somebody hacked the exhaust port at the header flange. What epxoy are you using ?

No epoxy there ... instead that's Brazing , welding Brass to bottom of Exhaust Ports

I use the Drag Times DA calculator for my correction factor. Is this reasonable? its better and more accurate to use Air Density OnLine's Calculator ( even though it sometimes calculates wrong Vapor Pressure value ) it calculates the Density Altitude Feet closer than DragTimes or Richard Shelquist ...

I suppose your not allowed to use the W shaped or finned intake port floor. Would be a cool way to have fun with the port while complying with the cc rules. You can.. I tried it on my first engine. "I tried it on my first engine." did it gain HP ?? did it lose HP ??? or no difference in H...

July 8 2011 12.75 @ 105.93, 8.082 @ 83.39, 1.74 60’ Track elevation: 630’, 73.4°F/23°C, 29.83” Hg/101.02 kPa, 65% rh DA: 2046’ 12.449 @ 108.551 MPH corrected Moroso says that at 3650 lbs and a 108.56 MPH (I'll use corrected) HP is 350. But, the car only produced 280HP at the tires so my thinking mu...

Doug_Hughes_SBC_461X_as_received_OEM_shape_Cyl#3_Nov_6_2023.jpg 20231106_174006_2016x1512.jpg 20231106_173602_2016x1512.jpg 20231106_173552_2016x1512.jpg 20231106_173527_2016x1512.jpg Mill_for_ScrewInStuds_4.jpg Mill_for_ScrewInStuds_3.jpg Mill_for_ScrewInStuds_2.jpg Mill_for_ScrewInStuds_1.jpg Mil...

i just by accident found this old Picture
using Epoxy AB Sticks to extend Runner Dividers , they also touch each other
at Plenum Floor
 

Larry, what size tungsten did you use? Also, did you need to use your chiller to keep it cool? Thanks 3/32" tungsten in TIG i have a brand new water cooled TIG Torch in a box , never opened it, never used it :D for that amount of welding , a few times i wanted to hook it up and use it , too la...

SpeierRacingHeads wrote: ↑Sat Apr 06, 2024 2:48 pm Here is a 300-25 I done for a 350/360hp Super Stock engine. It hated it! Ended up pulling it and grinding it all back out while it was still on the dyno.

Chad, was that with a Q-Jet Carb ???
its very hard to beat the Edelbrock Victor-E Manifold with a Q-Jet

Anybody have pics of their work? DSC03108_1280x960.jpg DSC03114_1280x960.jpg DSC03116_1280x960.jpg DSC03127_1280x960.jpg DSC03140_1280x960.jpg DSC03142_1280x960.jpg DSC03143_1280x960.jpg DSC03144_1280x960.jpg DSC03147_1280x960.jpg DSC03148_1280x960.jpg DSC03154_1280x960.jpg   Impressive work as alw...

Larry, do runner extensions this long have any side effects like needing to stagger jet, engine wanting more spacer area or a reduction in reversion pulse dampening that you have seen? it didn't need any Jet staggering , mostly because 2 Spacer's added Plenum height causing largest amount of the Mi...

Anybody have pics of their work? DSC03108_1280x960.jpg DSC03114_1280x960.jpg DSC03116_1280x960.jpg DSC03127_1280x960.jpg DSC03140_1280x960.jpg DSC03142_1280x960.jpg DSC03143_1280x960.jpg DSC03144_1280x960.jpg DSC03147_1280x960.jpg DSC03148_1280x960.jpg DSC03154_1280x960.jpg   Larry, do runner exten...

Anybody have pics of their work? DSC03108_1280x960.jpg DSC03114_1280x960.jpg DSC03116_1280x960.jpg DSC03127_1280x960.jpg DSC03140_1280x960.jpg DSC03142_1280x960.jpg DSC03143_1280x960.jpg DSC03144_1280x960.jpg DSC03147_1280x960.jpg DSC03148_1280x960.jpg DSC03154_1280x960.jpg