Upgrades to my stock 273 67 Dart GT

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I did this same swap and for the same reasons.
My well-tuned car would only pull to about 4700-4800 rpm's Wide Open with the 2Bbl and Single Exhaust.
I switched to Dual 2" Exhaust and a 500Cfm 4Bbl Carb. It maybe gained 5 Horsepower honestly. But!
It will pull all the way to the end of my tachometer now and gets about the same mileage.
I call it Smiles Per Hour and my seat-of-the-pants Dyno says It was well worth it!

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Redhelmet said:
I'm leaning towards doing headers at the same time so i don't have to go back and add them in later. So id like to hear opinions on TTI vs DOUGS and if theres any specific products from them that would be best/easiest to install! (LINKS would be appreciated).
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either will fit with your column shift, although you may need to alter the linkage slightly. tti offers a full length and a shorty-- i know you have to mod the linkage on the shorty, but it's not a big deal.

both sell a quality product, however you can call tti on the phone if you have a problem.

additionally, tti sells a complete exhaust system from the headers back.


Also I saw on the forums that dumping the exhaust before the bumper is cheaper and sometimes easier on the 67 darts (Correct me pls if im wrong) But what is your guys' opinion/advice on dumping the exhaust early as opposed to taking it all the way to the bumper, pros and cons of each?
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pros: it's cheaper
cons: it's loud, you may also get drone at specific speed/rpm

there are several companies that sell tail pipes (the part that goes from the muffler up and over the rear axle and to the bumper) specifically designed for 67~69 darts.

Redhelmet said:
Also curious if once i have headers and mufflers ready if my local shop can do the rest or do i need to buy/supply any more pipes etc
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a competent shop should be able to handle an install if you show with parts.

part of the benefit of a complete system such as TTI is that it comes with everything you need to do the install yourself. the connections are slip fit with clamps so you just bolt everything together and you're ready to party.

there are other companies that make complete kits (pypes, hooker blackheart) that are similar and can be installed at home, i know a few the fit is a little more fiddly than others but it's all doable.
 
i used a summit own brand header back dual exhaust kit on my 68 valiant. it included mufflers and came all the way out the back. it has slip fit joints and comes with clamps so nothing more to buy. the tail pipes need to be cut to length/preference under the bumper and in my case the middle pipes also needed shortening but that's just because valiant's are shorter wheelbase so won't apply to you. all in all a good kit that was easy to fit at home.
neil.
 
junkyardhero said:
either will fit with your column shift, although you may need to alter the linkage slightly. tti offers a full length and a shorty-- i know you have to mod the linkage on the shorty, but it's not a big deal.

both sell a quality product, however you can call tti on the phone if you have a problem.

additionally, tti sells a complete exhaust system from the headers back.

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pros: it's cheaper
cons: it's loud, you may also get drone at specific speed/rpm

there are several companies that sell tail pipes (the part that goes from the muffler up and over the rear axle and to the bumper) specifically designed for 67~69 darts.


a competent shop should be able to handle an install if you show with parts.

part of the benefit of a complete system such as TTI is that it comes with everything you need to do the install yourself. the connections are slip fit with clamps so you just bolt everything together and you're ready to party.

there are other companies that make complete kits (pypes, hooker blackheart) that are similar and can be installed at home, i know a few the fit is a little more fiddly than others but it's all doable.
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Thank you! I checked out the site for TTI and see 2.5 and 3 inch systems do they do 2 inch or 2 1/4 or would 2.5 be fine for my setup? Ill definitely give them a call!
 
mbaird said:
You could spend a bunch of money and time buying various parts OR you could just have your heads ported and get more HP. Just find a set of 308s and clean up the bowels / valve job / backcut the intake valves . .
If the engine is original it’s probably close to needing one anyway . And you would have a solid base to build from which will complement any future upgrade . Then that 4 barrel intake will make a difference.
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Actually, you want '302's...'308's have large open chambers...compression loss.
 
Back again looking for some insight! The TTI Headers per their site recommend buying certain mini starters. I searched around on the forums and noticed a lot of people talking about mini starters from dakotas etc. Just wanted to see if theres any specific starters preferably something cheaper/easier to buy say from summit etc. That you guys would recommend or vouge for to fit with a 273/tti setup. Thanks all.
 
Redhelmet said:
Hey everyone,

I am looking for info/advice on upgrades for my stock 273 dart GT. This is my current daily driver, however, I want to make the car more lively and powerful without going too far obviously as mileage and reliability are important. I have had issues recently with stalling/and or vapor lock once the car is hot and at idle. Had a couple mechanics say my carb needs a rebuild as well. (This is/was my first car and I'm learning). I would rather put money/energy into a 4 barrel carb/intake upgrade first for this reason.

So firstly I have been searching on the forums and come to the conclusions that my options for intakes are the LD4B and PERFORMER intakes. I am leaning towards the PERFORMER as I can buy it new online. If someone could provide pros and cons to these as well as ease of swapping either onto my stock 273 1967 v8. As well as what carb may be best for my goal/setup.

The second upgrade I was considering doing alongside this was my exhaust and/or headers. I really hate how quiet the car is lmao. I do have a muffler that i bought months ago before I was in an accident with my car. While my car is currently being repaired in the shop i want to do my research and prepare/buy parts to upgrade the dart once I get it back. I will attach a photo of the muffler I bought below. I believe I can only use this muffler if I keep the car single exhaust (IF someone can confirm this that would be great).

However, I am thinking of going to dual exhaust and want to know the best/most affordable way to do that with regards to headers, X pipes, H pipes, etc. Any info on this would be greatly appreciated. How much of a sound/performance difference will dual exhaust make?

I browse SUMMIT booklets etc and look at headers etc and was curious for example when I see headers that say they're applicable to a 273 mopar. How many issues would I have fitting them etc? More insight/advice on headers would be nice as well as if I need them to do dual exhaust.

Appreciate any info/advice as well as tips on other upgrades you guys think I should maybe focus on. SORRY for the noob questions thanks guys.

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mygasser said:
in order i'd go dual exhaust, 4 barrel inlet and carb, electronic ignition then headers. if you installed a little more cam while the inlet was off then so much the better. have fun :thumbsup:
neil.
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@mygasser hit the nail on the head. He beat me to it. That is exactly what I was going to say. If you bump up the lift and duration on your current cam and do the dual exhaust, Eddy Performer, 600 CFM carb, electronic ignition and headers, I think you would be very happy with the results. Even with a fairly mild cam, I bet you'd be looking at a 35 +/- HP increase. That would be a fun improvement.
 
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Redhelmet said:
Back again looking for some insight! The TTI Headers per their site recommend buying certain mini starters. I searched around on the forums and noticed a lot of people talking about mini starters from dakotas etc. Just wanted to see if theres any specific starters preferably something cheaper/easier to buy say from summit etc. That you guys would recommend or vouge for to fit with a 273/tti setup. Thanks all.
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1989 dakota V8 or V6

www.summitracing.com

ACDelco 88877195 ACDelco Starters | Summit Racing

Free Shipping - ACDelco Starters with qualifying orders of $109. Shop Starters at Summit Racing.
www.summitracing.com www.summitracing.com

you can also grab a reman from rock or the local. try and stay with a known brand a like delco, denso or remy.
 
Redhelmet said:
Thanks that is perfect! was just hoping i didn't actually need the $300+ dollar one they link lol
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nah man, even the $100 Vato-zone starter will do. the lifetime warranty is nice and all, but swapping them out gets old real quick so get something decent.
 
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