Hey Rob, Thanks for your input. I like the goin' fishin' analogy. Thanks for the tip on jetting. The Holley manual for that carb suggests jetting down 1 step for every 2000 ft. but it sounds like that might not be the way to go. If I do try that and get a stumble I'll know what's going on. Looks like I just need to play. Wish I was rich, the chassis dyno I mentioned in earlier posts can be rented for $600 per day. That would be a great way to quantify any changes besides seat of the pants. Thanks again, Bob Belz 71 SS454
----- Original Message ----- From: "Rob Thorburn" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 09, 2002 9:25 AM Subject: Re: [Chevelle-List] tuning tips anyone? > Hi Bob: > > Even if someone had a BB with all of those parts, it would be a different > setup because of the tranny, the ring and pinion gear, and so on. > 1. Get in that: I'm Goin' fishin' mood, you know: I'm going to waste away > the whole day, but I'm not a bum, because I'm fishin'. > 2. Find some isolated area, away from residential, where you can tear off a > couple of gears. I have a freeway on-ramp. > 3. Change the total timing in two degree increments. Start at 30 degrees, > run up the ramp, then again at 32, and so on. Jot down your impression of > each timing setting. As you get away from the ideal setting it should > become obvious. > 4. The same idea with the jetting. Jump two jets at a time, starting with > the stock jetting. Leaning a Holley, most often, causes undesireable > effects, such as bog or stumble. Even for your elevation, never > underestimate a Big block's love of fuel! A stumble is a "too lean" > condition, one hundred percent of the time. I will go out on a limb and say > that you cannot make a engine fall on its face with too much fuel. A too > rich condition will cause a loss of chrisp acceleration. You will sense > that the engine is cleaning out through that too rich part. The most common > over rich error is over modifying the accelerator pump, most all other > errors are too lean. If you have a big cam, and/or headers, the engine will > want more fuel than what Holley jetted for. > > Have fun; > Rob '67 Malibu > '67 El Camino (still in a basket) > > > ----- Original Message ----- > From: "Robert Belz" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Sunday, July 07, 2002 7:18 PM > Subject: [Chevelle-List] tuning tips anyone? > > > > Anyone care to share their tuning specs if they are using a Holley 770, > > Performer RPM intake and MSD distributor (on a big block)? So far I have > > tried 32 to 38 degrees total timing, left the blue bushing in the > > distributor and changed the springs to the light blue to get all advance > in > > by 3000 RPM. Left the carb jetting stock (probably could lean it out some > > as I'm at 4800 ft.) Haven't seen much in the way in performance increases > > so far. > > Thanks, > > Bob Belz > > > > > > ----------------------------------------------------- > > To Unsubscribe please visit www.chevelles.net/list.html > > To start a new topic, send mail to: [EMAIL PROTECTED] > > > > > > > > ----------------------------------------------------- > To Unsubscribe please visit www.chevelles.net/list.html > To start a new topic, send mail to: [EMAIL PROTECTED] > ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
