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-   -   Hi all! New Guy here, Low Buck Comp build, E/ED (https://classracer.com/classforum/showthread.php?t=48563)

MICROMACHINE72 11-11-2013 11:14 AM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Thanks guys, yes we are building a homemade header, with a thick port spacer plate to get the intake out farther so the primaries can have a little straight shot before being bent. I'm on the fence however if I should do two 3 into 1 with 2-3" collectors or 6 into 1 3-1/2 collector. The engines don't scavenge well so I would think the 6 into 1 may be the ticket unless we get some pulse reversion? Maybe build both and see what works better. I'll take it to a local speed shop chassis dyno so I can play with the carbs, they only charge $100 for 2-hrs play. And yes, the pistons are your typical TRW-Speed pro heavy weights, but I have removed a bunch off the pin bosses, and with the rods I'm using they will be coming out the hole about .100 so we will mill the heads down around the dome, bring the ring pack up a little. Like I said earlier, this is the first effort, if all goes well I have plans for a homemade solid roller set up and fab up a better intake. The goal is High 8.90's/.8.80's with the first effort.

cutta 11-12-2013 11:45 AM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Quote:
Originally Posted by MICROMACHINE72 (Post 408349)
Thanks guys, yes we are building a homemade header, with a thick port spacer plate to get the intake out farther so the primaries can have a little straight shot before being bent. I'm on the fence however if I should do two 3 into 1 with 2-3" collectors or 6 into 1 3-1/2 collector. The engines don't scavenge well so I would think the 6 into 1 may be the ticket unless we get some pulse reversion? Maybe build both and see what works better. I'll take it to a local speed shop chassis dyno so I can play with the carbs, they only charge $100 for 2-hrs play. And yes, the pistons are your typical TRW-Speed pro heavy weights, but I have removed a bunch off the pin bosses, and with the rods I'm using they will be coming out the hole about .100 so we will mill the heads down around the dome, bring the ring pack up a little. Like I said earlier, this is the first effort, if all goes well I have plans for a homemade solid roller set up and fab up a better intake. The goal is High 8.90's/.8.80's with the first effort.
What design constraints will you be using to build your rocker arms?

MICROMACHINE72 11-12-2013 01:14 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
I'm just using std. 1.7 BBC rocker arms

Harry 6674 11-12-2013 01:43 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Very cool build. Maybe you'll get to pit on asphalt all the time or at least high and dry.

Marty Knox 11-12-2013 02:22 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Quote:
Originally Posted by MICROMACHINE72 (Post 408349)
Thanks guys, yes we are building a homemade header, with a thick port spacer plate to get the intake out farther so the primaries can have a little straight shot before being bent. I'm on the fence however if I should do two 3 into 1 with 2-3" collectors or 6 into 1 3-1/2 collector. The engines don't scavenge well so I would think the 6 into 1 may be the ticket unless we get some pulse reversion? Maybe build both and see what works better.
I've been kicking around the idea of pairing cylinders, going 3 two into one, then three into one collecter.

cutta 11-13-2013 03:33 AM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Quote:
Originally Posted by MICROMACHINE72 (Post 408537)
I'm just using std. 1.7 BBC rocker arms
I gotcha, I though you may have been doing a clean sheet design of some. Was hoping to get some ideal stiffness, stress, and mass numbers.

Marty Knox 11-13-2013 07:46 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Quote:
Originally Posted by Marty Knox (Post 408554)
I've been kicking around the idea of pairing cylinders, going 3 two into one, then three into one collecter.
This is an idea I got from Tom Langdon. Pair the 1 and 6, 2 and 5, and 3 and 4. The idea is to increase the mid-range torque.

RonTheAnnouncer 11-13-2013 10:24 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
Quote:
Originally Posted by Marty Knox (Post 408777)
This is an idea I got from Tom Langdon. Pair the 1 and 6, 2 and 5, and 3 and 4. The idea is to increase the mid-range torque.
Way too much thought put into that. Just run zoomies!:D
Good luck on your build, Micro, I applaud your courage trying to run comp on a budget! I love looking at all of the wild engine combos guys run in that class.

MICROMACHINE72 12-07-2013 06:50 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
4 Attachment(s)
Couple of new pics from last couple weeks up to today.. Need to get my ***** in gear if we are so make our goal to the gators.. Cutting the tops of the sleeves on the Bridgeport, Made a little fixture and final decked it today! Hurray! Might go out in the garage tonight and set up the final bore operation 4.00. Picked up this little Jewel (crank grinder) this past Thursday at an auction. I think I'm the only one in the neighborhood with one! 5.4 "stock" Triton-mod-motor rods ready to go!

MICROMACHINE72 12-07-2013 06:53 PM
Re: Hi all! New Guy here, Low Buck Comp build, E/ED
 
1 Attachment(s)
rods..


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