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  #16 (permalink)  
Old 02-27-2005, 12:13 PM
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Running a .045 gap on the plugs right now, ac 135 plugs i believe or maybe they are 134 not sure, anyways total advance is 34 degrees. As far as the cating numbers I did post the last 3 digits of them. I checked through nopa rules and dont see anything banning the double humps, just most aftermarket, all vortec and angleplug heads.

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Old 02-27-2005, 12:32 PM
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Oh another thing,
Right now as the car is sitting in the shop I have started out with a 12 degree initial advance and light springs that give another 22 degrees in the dist. I'll be playing around with that once the track opens and I can test for any performance gains by increasing initial and lowering the centifigul. Unfortunately ti wont be opening til the snow melts which is another 2 months away. Good thing for me as it gives me lots of time to be ready and have this thing tuned
Also I have ordered a few books to guide me on my way. How to rebuild your smallblock chevy, High performance engine assembly guide, How To Build & Modify Chevy Small Block V8 Cylinder Heads, and Chevy Small Block Part & Casting Number Guide. Any others that anyone could reccomend?
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Old 02-27-2005, 12:37 PM
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.045" may be a little big on the spark plug gap. That is more for a CD ignition. You may make more power with .035" to .040". Or, get a spark box. It will make a huge difference.
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Old 02-27-2005, 12:50 PM
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I cant wait to give the list of parts/tools I want to the owner/driver tomorrow.
He's really gonna love you guys
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Old 02-27-2005, 06:37 PM
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If you buddy wants to ride around then what you got will probably work with some tuning, but the hard cold facts are guys spend thousands of $$$$ on these engines and a real competitive piece has heads tweaked by HVH, a Braswell Carb, and a custom camshaft. Just with the 3 items mentioned he can spend 6K $'s. I'm not saying go out there and not have fun, I am telling you that some timing and spark plug changes will still have you falling short on power to the guys up front by as much as 100HP.

Chris
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Old 02-27-2005, 08:25 PM
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C and S Specialties makes some good carbs as well.
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Old 02-27-2005, 09:00 PM
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I understand and appeciate what your saying but Ive got to tell you that with our $2k engine we still placed 16th in track points and 49th in NOPA and we only raced half of the reg season races at the track we were running.
We were plagued by engine troubles last year and I dont want that happening with me calling the shots this year. If I can pull an extra 10 hp out of what we have then Ill do everything I can to get it. If I can tune this setup to place top 5 all year long we have a good chance at track and even NOPA championship and thats what were concerned with. We have done it before but like I said in an earlier post...I wasnt the engine guy...just carb and chassis tuning so I have a lot more to deal with but Ill get it figured out hopefully by season start.
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Old 03-15-2005, 09:29 PM
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460 and 461 heads were 1.94's...they were double humps as well...327 i believe ...breaks out ur builders clay and check ur clearence b4 tring to bump up ur lift or compression ,since u stated u had this thing milled a lot...what about converter's and intake choices? they also have a big effect on power and performance.
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Old 03-15-2005, 10:58 PM
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I hate the rules we have to run by....
Stock converters and stock cast iron intakes only.
Heres the rules we have to run by....guess I could have posted them long ago


http://www.noparacing.com/PDF%20Documents/05Streetrules.pdf
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