[78w72]

Originally Posted by Steve C.

Flow characteristics of various high-performance mufflers might be interested.

You'll need Adobe Acrobat Reader to view:


http://www.exhaustsoundclips.com/cfm.pdf



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that looks like the charts from jim hands book. shows "flomasters" flow terrible & are comparable to OEM stock mufflers. he also did on car testing at the track & the results reflected those CFM numbers.

the best value to performance are the ultra flos, & pypes race pros are almost an identical design. some dont like the sound but others love them, i own the race pros on a pypes 3" X- system with 2"/3.5"hooker super comp headers & i'm very happy with the sound on the street.

jal- if you change to new mufflers, please report back if they helped the times.

[Dragncar]

Originally Posted by 78w72

for mufflers, a straight through design is best for max flow. jim hand tested all kinds of mufflers in his book & the flowmasters were one of the worst flowing.

the pypes race pros & dynomax untraflos are some of the better flowing mufflers & are a straight through design. summit has them for great prices... about $60ea for race pros.

And Flowmasters sound like cheap turbo mufflers with 1/2 gallon of water in them. There is that.

[68blackbird]

Dragncar. Your Inbox is full?

Originally Posted by Dragncar

And Flowmasters sound like cheap turbo mufflers with 1/2 gallon of water in them. There is that.

[Dragncar]

Originally Posted by 68blackbird

Dragncar. Your Inbox is full?

I am at 92% so I am not sure why you are having problems with PM. I deleted a few more, give it a shot.
I am looking for the cam card since I finally have a day off. I know I have it. I have been working straight from the 16th, except for Cmass day.

[Dragncar]

Originally Posted by 68blackbird

Dragncar. Your Inbox is full?

68blackbird, I found a pic of the cam card you were looking for. Got me to 10.83 with 9.3 CR
I bought it used off E Bay. I could sell it when I pull the engine but is still in the car right now. Maybe UD can regrind one.

[Steve C.]

I used those UltraDyne lobes but with a 108 lobe separation.... and with stinky hair

Bullet Racing can grind a cam with those lobes.

http://www.pontiacstreetperformance....p/racerSC.html

Back then I used a Dr.Gas X-crossover with 3.5" in and 3.5" out reduced at the mufflers. It was heavy ! Keep the weight in mind.


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