moparstud440
Well-Known Member
How fast in the 1/4 have you gone with 1 5/8 headers with 3" collectors? ET, mph and car weight? Thanks.
1 5/8 headers
- Thread starter moparstud440
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33IMP
Well-Known Member
I'd like to help, but I don't think I've ever had headers as small as 1 5/8.
Wait. Maybe on my four banger vega.......
Wait. Maybe on my four banger vega.......
dartindanno
Well-Known Member
70 Dart 11.9 at 107 mph, 360, Trick Flow heads, 250/[email protected] Bullet cam with .623 lift Cope 904 rmvb with Ultimate 5200 stall and 3:91 gears, MT pro bracket radial
11.40s that was with 1.625 primaries and 2.50 collectors and complete 2.50 exhaust. Dougs headers.
Some of you racers just can’t help yourselves with anything not “race” enough can you?
You forgot to add maybe “on a dump truck” or maybe on a “tow motor”
Rat Bastid
Dunamis Metron
Some of you racers just can’t help yourselves with anything not “race” enough can you?
You forgot to add maybe “on a dump truck” or maybe on a “tow motor”
He was waiting for me to say that lol.
I knew I’ve read that here somewhere before!
Same headers I had.
Ran 1 5/8 hooker competition series on a 340 many times. Worked great. I also had them on this Duster. Fit nice didn't hit anywhere and ran and performed good when sold.
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Locomotion
Well-Known Member
11.14 @ 117 mph weighing 3,540+ lbs. 360-4bbl, unported LAX heads, 1 5/8" - 1 3/4" TTI step headers with 3" X-pipe & Dynomax Ultraflow mufflers ending at the rear axle. 904, footbrake on 9" slicks.
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9secRR
Well-Known Member
9.90 at 135 mph at 2880 lbs.
B3422w5
Well-Known Member
10.68 at 3350…124.70
I know you’re making changes to things, but if it was just headers, How much better do you think it’d do with those headers you just bought?
B3422w5
Well-Known Member
wish I knew. Couple guys that have forgotten more than I know said 25-30 horse perhaps. Dwayne was one of them
not sure what that is on a time slip.
only other thing I am doing is freshening trans, and changing flash on vert( hoping I am going the right way on that)..lol
decided not to swap to 1.6 intake rockers
I knew you were running 1-5/8 and often mentioned yes it was a compromise, but that they fit so nice and for (up to now) they were staying put. I’m no where near that level of performance but could probably use bigger diameter tubes as well. My issue is my exhaust is bent and positioned to fit the Dougs and unless an upgraded set sets exactly as they do I’d need to redo the head pipes. Not happening anytime soon
B3422w5
Well-Known Member
I knew you were running 1-5/8 and often mentioned yes it was a compromise, but that they fit so nice and for (up to now) they were staying put. I’m no where near that level of performance but could probably use bigger diameter tubes as well. My issue is my exhaust is bent and positioned to fit the Dougs and unless an upgraded set sets exactly as they do I’d need to redo the head pipes. Not happening anytime soon
I have the intention to reuse the 3 inch Kooks mufflers I have on the car.
probably gonna take some fab work, i know a couple local guys who are real good with exhaust.
as I drive the car a good bit, it’s gonna need to be made to work
dartindanno
Well-Known Member
From all these responses it sounds like the 1 5/8 header can handle some decent power
Dan the man
Well-Known Member
A good friend of mine had 1 3/4" headers with 3" on his '73 dart sport with a built 360. He finally went with 1 5/8" long tube headers from Doug's and a 2 1/2" exhaust system and it ran a lot better. Bigger is not always better.
Rat Bastid
Dunamis Metron
Then there was something else wrong.
Rat Bastid
Dunamis Metron
You going to apologize for the red X when I test all this **** and show that big tube headers on low compression engine MAKES power IF you don’t kill it will *** backwards cam timing???
Can you translate this jibberish. lol
Not to somebody who thinks 383 road runners are quicker then 340 darts and cudas sureeee cant
when you know you know
carry on
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