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-   -   merge collectors ? (https://classracer.com/classforum/showthread.php?t=22478)

Tony Curcio 01-01-2010 03:33 PM
Re: merge collectors ?
 
Quote:
Originally Posted by gmonde (Post 160189)
what was the size on the merg collector vs the straight collector i know from the o2 sensor just by adding collector extensions(14") on 3 1/2 hooker headers it changed the afr by.13.00-12.50 and it picked up in the 60 ft and the bung is close as i can get to the primary out lets as possible ,,,your merge collector does it choke down??? or is it the same size as the straight ??? gmonde

The straight collector is 14" long by 3" diameter.

The merge is 8" long, the narrow part of the "venturi" is 3.0", the outlet is 3.5".

72Malibu 01-01-2010 03:41 PM
Re: merge collectors ?
 
Quote:
I have found that, Usually, lower compression engines make more power on a little richer mixture.
They can also like a degree or two more timing than the same combo with hi compression
I am far from scientific in any of my tuning, no afr meter, no egt, just tuning on my 10.5-1 alum. headed big block. I run my timing locked at 40* and the 1000hp is jetted 87/92 w/ rear pv blocked. It falls right in line with the fat/advance statement made above ;)

gmonde 01-01-2010 07:53 PM
Re: merge collectors ?
 
whats the cubic inch on the engine and i assume its a stocker ,whats the primary tube size ? doing some research gmonde

72Malibu 01-01-2010 08:39 PM
Re: merge collectors ?
 
Mine is 505 cubic inch, 2" tubes, just a bracket racer.

Tony Curcio 01-02-2010 11:27 AM
Re: merge collectors ?
 
Quote:
Originally Posted by gmonde (Post 160359)
whats the cubic inch on the engine and i assume its a stocker ,whats the primary tube size ? doing some research gmonde
350 c.i., 255/280 HP stocker. Step headers with 1 5/8 to 1 3/4 tubes.


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