"It lives"
Thread Starter
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
"It lives"
I finally started my freshened (re cammed) motor after somewhat depressing dyno results (If we "raced dynos" I would be SCREWED) it turns out the dyno I was on is overly conservative. I also stepped up and bought a new MSD distributor with dual pickups, a set of Taylor spiro pro wires and I had to buy a new Autometer tach (goodbye tach drive). Timing the motor made quite a difference in as much as the timing mark doesn`t bounce around the way it did with my trusty factory transistorized distributor. The only problem (so far) is the brackets that hold the tach in are too short (or my dash is too thin) but I will figure something out. ...redvetracr
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Re: "It lives" (542C2)
I must have missed you adventures at the dyno. What did you end up making?
(Remember, I am the guy that races dynos.)
Steve
(Remember, I am the guy that races dynos.)
Steve
Race Director
Joined: Jan 2000
Posts: 13,013
Likes: 2,253
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Re: "It lives" (redvetracr)
Don't worry about dyno numbers. Look for improvements on it. There are tons of variables that can be "manipulated" to create good dyno numbers. Everyone I know is still laughing at that 911 HP big block on the front of Car Craft.
Same goes for flowbenches. The one I use is known to be conservative. Even though it is calibrated the same and all, they have literally taken a head that was just flowed on it, drove across town and flowed it on an identical bench and seen up to a 8-10% increase in flow!
Yet the engine dyno at the main shop I use is almost dead on identical to a shop down the street. Same deal, dyno'd engine, took it down the street and dyno'd it within 3 hours and it made exactly 2 hp different! That's close!!
I could have kept "racing" mine the other day, but I would soon have moved the engine way past the parameters I wanted just to create a bigger number. Does no good. There is a lot more to making a fast car than peak Hp numbers.
I've "kicked" it beside some blown cars as we left a chassis "dyno" day with my old 427. Knowing they made more HP than I did, I just knew they would walk away from me. SURPRISE.....I was still way out in front each time even though we made sure we were going fast enough to make sure wheelspin would not be an issue and it was a pure "HP" race. Gotta work on the "combo". Trust me. I've been spanked by stuff that shouldn't have beat me too!
JIM
Same goes for flowbenches. The one I use is known to be conservative. Even though it is calibrated the same and all, they have literally taken a head that was just flowed on it, drove across town and flowed it on an identical bench and seen up to a 8-10% increase in flow!
Yet the engine dyno at the main shop I use is almost dead on identical to a shop down the street. Same deal, dyno'd engine, took it down the street and dyno'd it within 3 hours and it made exactly 2 hp different! That's close!!
I could have kept "racing" mine the other day, but I would soon have moved the engine way past the parameters I wanted just to create a bigger number. Does no good. There is a lot more to making a fast car than peak Hp numbers.
I've "kicked" it beside some blown cars as we left a chassis "dyno" day with my old 427. Knowing they made more HP than I did, I just knew they would walk away from me. SURPRISE.....I was still way out in front each time even though we made sure we were going fast enough to make sure wheelspin would not be an issue and it was a pure "HP" race. Gotta work on the "combo". Trust me. I've been spanked by stuff that shouldn't have beat me too!
JIM
