Today I think I got it figured out so we can fairly accurately determine RVP at home (HVP) as suggested in yesterday's entry. Test 1--First, I refrigerated the complete test bomb for an hour, bringing its surface temperature down to 34 degrees F...
Today I had a sled racer from Utica with a sealed pail of C12 and it tested dandily--6-7psi. But last month Tripod Dan's sealed pail of Q16 was nearly dead at 2psi. Then Jesse Helwig bought 5 gallons of Sunoco Maximal from a bulk tank at a retailer--0 psi, totally...
I've done a couple more YouTube videos talking about what I feel is proper mixing of oil/ fuel, and transfilling from drum to jug, and jug to sled. They should be up by this coming weekend. And please forgive the Star-Wars-like intro and credits--that's the work...
also airflow/ HP improvements with preproduction Boyesen Viton sealed/ dampened/ insulated Rage Cages!
Causes, effects, avoidance… understanding the chemistry = better tuning!
SLP, MBRP, Speedwerx, BMP and D&D Riot Kit with Stock, D&D, and Jaws exhaust
Cat XF6000, 7000, 8000, Etec 600 & 800, Viper vs XF7000!, Polaris Indy 600 & 800
horspower, dB, airflow, backpressure, and appearance
The Cat 800 that Johnny Caputo and Jeff Sherlock are bringing to tune on 11/24 is his normally aspirated lakeracer! Johnny's supercharged Cat 800 is being brought East by the Speedwerx crew (along with a second supercharged Cat 800 and a stage 2 single...
Descriptions of how carburetors work tell us that fuel spraying from the needle jet is atomized by the airflow and… Wait. Stop right there. How is it atomized, and why? What makes the atomizing finer or coarser? Let’s look into it. Long ago, a...
Every year the sled dyno seems to get slower, and here it is (along with MC SuperFlow CycleDyn eddy current roller dyno schedule) for Spring-Fall 2013: 3/16 Jeremy Higgens (MC) Yam YZ450F flattracker (RLJ-Ron Jewell engine) 4/7 Sean Ray (MC)...
Now that we have testing equipment I like to test racers' fuel's RVP while we're hooking up the sled/ engine to the dyno. I've caught several samples with no or low RVP, meaning we must have the engine very hot while tuning on the dyno to ensure adequate...
On Apr 20, 2013, at 5:56 PM, Baldur Gislason <baldur@foo.is> wrote: On the latest post about listening for deto, I figured I'd chime in.10 years ago I started listening for detonation on car engines using a pair of Peltor ear muffs that I drilled and epoxied...
Our copper tube detonation sensor—which functions much like a stethoscope—has been the subject of much discussion with DTR members who operate their own engine and track dynos. This will provide clarity and understanding about how we use it. Sean Ray installed...
testing higher airflow engine with timing, fuel flow, Y pipes and single pipes on 92.7 octane
Here's a Zeltex 101C octane test meter that I acquired on Racejunk.com for much less than the current new price of $11,000. It had been used for a few years by a dirt track owner for testing gas in some class of racers who were limited to using pump...
Reid Vapor Pressure TESTING! For race engine tuning, our biggest problem is stale race gas that racers buy unwittingly. Stale race gas can have excellent octane, but volatility can be poor due to the absence of important “light ends” of the fuel. Light ends are the...
BOOST, TIMING, & FUEL On the dyno, we often jockey ignition timing and boost pressure levels, to enable us achieve maximum reliable power on a given octane. Do we go with more timing and lower boost, or less timing and more boost? Less timing...
Turbo Mach Z twin, now with twin pipes, Turbo HTG 1080 triple, now with dialed in carburetion
12/14 Petschke Motorsports dyno testing the ETEC 800 with their new flowbench tested Y pipe results posted on this website members' pages 12/15 Keith Monroe, F7 w/ D&D trailport dissapointing performance last season was traced to a counterfeit BMP pipe modded...