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Michigan Short Track Racing Club > Specific Class/Division Discussion > Tech Talk
thunderracer
Been away a while but I have missed this site. I kinda lost the love for racing for a bit when a couple of individual burned me by keeping my parts. I Didn't have the money to buy more so I got out of it. I have been collecting little by little thow. that brings me back to MSTRC.

I am almost finished putting together my motor. I have two different sets of heads to choose from. the numbers are 14102193 and 14102183. The motor is nothing special. Its just a stock freshly rebuilt 350 with a mild street cam. I will be running a 650 holly on a weiand aluminum intake. Ime hoping to be able to race at Thunderbird or crystal. Dont know if it makes a difference but Inless I can get my two speed power glide back I will most likely be running a 350 turbo. I have a choice between 4.36 or 2.75 gear for my ford 9in rear So wich set of heads should I slap on the motor?

Before anybody seys it I know this is not the best set up in the world but being forced to start from scratch this is what I have and cant at this time afford any thing better.
thunderracer
80 views and no opinions?
governor
Go to Brezinski's web site and see which casting numbers they use and you will have a better idea of which one might be best.

If yours are not listed, might look for one that is.

Gov
racerone27
i'm not that familier with the new style heads. you do want to use the heads with the bigger intake valves. also, use the head that has a combustion chamber more like a heart shape. if you have a way to measure the combustion chamber size, then you might want to try the smaller one. it will give you a little more compression. best to find someone who knows these heads. i would think many of the lead sleder's would know.

steve "pops" pastorino
Koolaid
Going off Mortec's website I can't find the # ending in "183". The "193" is only listed as an 87-up 305/350 1.94/1.50 valve head. My thought is that both sets of heads are actually "193's" - maybe the "183's" have some grease on the number that is making them hard to read?

If you are just scraping by with what you have, just throw on the set of heads that is in better condition and go out and have some fun racing! biggrin.gif
thunderracer
QUOTE (Koolaid @ Aug 21 2008, 03:23 AM) *
My thought is that both sets of heads are actually "193's" - maybe the "183's" have some grease on the number that is making them hard to read?


Thats what I was thinking to so two cans and a wire brush latter plus the neighbor coming over and looking at tells me the number is the 183. I too have searched hi and low for info and cant find any.

QUOTE
If you are just scraping by with what you have, just throw on the set of heads that is in better condition and go out and have some fun racing! biggrin.gif


Yep that's what this is all about. Ive tried for many years to get a car done. Every time somebody else needed a loan of a part I was there. They took advantage of that wich has put me behind. now Ime just gonna take what I got and go have a ball. Life is too short. sure would be nice thow if people didn't take advantage of other people I think ime just going to go with the 193's swirlys. they are a known.
lurker
I have been told of a few people running the 350 tbi swirl port truck head with good results, i myself dislike the intake port design, unless some port work is done. The heads do have the small 64cc chambers though, and would make good low rpm torque numbers due to the runner design which is a good thing,


Greg
carbman
QUOTE (lurker @ Aug 20 2008, 01:20 PM) *
I have been told of a few people running the 350 tbi swirl port truck head with good results, i myself dislike the intake port design, unless some port work is done. The heads do have the small 64cc chambers though, and would make good low rpm torque numbers due to the runner design which is a good thing,


Greg



We could never get more than 5700 rpm with TBI heads due to the intake runner design so you will have to gear properly.
lurker
im suprised it made it to 5700 rpm icon_smile.gif remove the swirl vane from the intake runner and things get better, the exhaust side actually flows pretty good

Greg
carbman
QUOTE (lurker @ Aug 21 2008, 12:35 PM) *
im suprised it made it to 5700 rpm icon_smile.gif remove the swirl vane from the intake runner and things get better, the exhaust side actually flows pretty good

Greg



We wanted to but can't do that in the sleds, at least not supposed to.
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