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Author Topic: 318, 340, or 360?  (Read 61511 times)

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270SE

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Re: 318, 340, or 360?
« Reply #270 on: November 17, 2010, 19:44:28 »

I thought I had read dak rt on a separate thread on here...kinda wondered why I couldn't find on . And I have my plan..just waiting for the motor. I've budgeted my checks to allow me to start saving fr the parts. But if I can get a set of headers that flow better, fit better, are coated already, and are cheaper..I'm going to.

And I don't want to stick a big block in this car for a few reasons..but mainly just because I don't want one. Eventually ill find a car with an excuse to get one..but not my DD dip

get the LA summit headers that are coated.  pretty much any "shorty" style truck header will have clearance issues with the brake booster, and possibly the power steering box.  there are some edelbrock ones in 409 stainless that looked promising and come with a Y, but I didn't want to spend $400 to find out they wouldn't fit....
Summit, Jegs, Hooker, Heddman, whatever. They all should work.
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patrickgrossman

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Re: 318, 340, or 360?
« Reply #271 on: November 17, 2010, 19:54:34 »

If you are looking for Dakota headers, I have a set of JBA's if you are interested.

Will they fit on the dip? I don't have the motor yet, but once the ball gets rolling on that project I may look into those..if they'll fit and are what I'm after.

Good lookin out though..ill keep that in mind

Thanks

the LA and magnum exhaust port and bolt locations are the same, so you could try them out on your existing motor for fitment in the car.

if you don't get the cam reground, I'd get the smaller Lunati voodoo roller cam, PN 60710...it's $320 from summit.  the crower 34418 for $306 would be a good fit, too.
the hughes HER0814AL would be good, too
all are very similar in profile to my cam, with a touch more exhaust duration.

for springs, the hughes #1110 springs are the best deal around.  you'll need their matching retainers, or retainers off of some 2.2L/2.5L chrysler motors in the junkyard.

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81cupe

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Re: 318, 340, or 360?
« Reply #272 on: November 17, 2010, 20:50:36 »

i had a 79 dip. i swoped the 318  for a 360 .. with a 2 bbr .. and it was well worth the time and cash .. i had to buy a new torqe converter for the 360 because there balanced diffrent .. and changed the oil pan to a car pan from a truck ... i tryed to use my 318 pan but the main caps were a whole lot biger on the 318 than the 360 .  a 360 with a mild cam and a 4bbr . and a 8.3/4 posi will be a good investment in a daily driver .... lots of fun in a 4 door dip .
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brotherGood

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Re: 318, 340, or 360?
« Reply #273 on: November 17, 2010, 21:21:42 »

Ok, well..as far as the header situation..ill probably just stick with the middle of the line ones from summit or jegs. And the cam ill probably end up going the regrind route..I just wasn't sure if the cost would end up around the same for a new one..cause if that were the case, id just get a new one.
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'86 Dodge Diplomat AHB. Rebuilt 318 LA/Magnum, cop 904, 8.25 rear.

79dodge4ever

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Re: 318, 340, or 360?
« Reply #274 on: November 21, 2010, 17:41:49 »

heres some info that may interest you, its directly from allpar.com
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Re: 318, 340, or 360?
« Reply #275 on: November 21, 2010, 20:14:09 »

Yeah. I saw that..and that helped my reenforce my decision for the mag 318 once that option was brought up again. And believe me...everytime I think about it...I get an evil grin on my face..lol

Even though its not going to be that much..its way better than what I've got now..and I can't wait. I'm in the process of getting my parts list together..so in the next few days ill have one up here. But I do have a question about the summit headers...does it matter for my use whether I get the coated ones or not..and would it be more cost efficient to get the uncoated ones and have them coated?
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'86 Dodge Diplomat AHB. Rebuilt 318 LA/Magnum, cop 904, 8.25 rear.

81cupe

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Re: 318, 340, or 360?
« Reply #276 on: November 21, 2010, 21:22:01 »

ull half to get them for a f body .... my buddy bought some from jegs and they were headmen headers and we had to take the driver side torsion bar off ... and neddless to say it took 2 hours to muscle it back in ....  thats not a good experince
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270SE

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Re: 318, 340, or 360?
« Reply #277 on: November 21, 2010, 21:28:58 »

ull half to get them for a f body .... my buddy bought some from jegs and they were headmen headers and we had to take the driver side torsion bar off ... and neddless to say it took 2 hours to muscle it back in ....  thats not a good experince
I have Hookers and frequently drop them and have no clearance dents.
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brotherGood

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Re: 318, 340, or 360?
« Reply #278 on: November 21, 2010, 22:20:10 »

But will it matter if they're coated or not. I'm honestly leaning towards a bigger name like hooker..simply because I know they are one of the top companies. And when it all gets put in, its getting done by a mechanic that is a friend of my dads...so dads gonna do some "bartering" with him to help bring down the cost. I think dad wants it done just as much as I do..lol
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'86 Dodge Diplomat AHB. Rebuilt 318 LA/Magnum, cop 904, 8.25 rear.

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Re: 318, 340, or 360?
« Reply #279 on: November 21, 2010, 23:03:32 »

Yes, the thermal barrier coatings help with keeping the under hood temps down (thus the heat/speed in the exhaust pulse). Also, the headers won't look like rusty garbage in short order- lastly, Stage 8 locking fasteners. I have never had to re-torque header bolts or listen to leaky header gaskets with these bolts. One thing on the thermal barrier coating- the chromey finish stuff isn't rated as high on temperature resistance. Not too huge a concern on a modern FI car, but on a carbed rig with mod's, you want to be sure you aren't running lean. That can heat the headers above 1400 degrees and start flaking the coating off.
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Re: 318, 340, or 360?
« Reply #280 on: November 22, 2010, 06:41:41 »

But will it matter if they're coated or not. I'm honestly leaning towards a bigger name like hooker..simply because I know they are one of the top companies.
Yes it matters, if you want them to last more than a year or two. Just because the name is big, doesn't make the product better. Use header bolts, no studs.
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GrissomRacing

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Re: 318, 340, or 360?
« Reply #281 on: November 22, 2010, 09:00:36 »

Unless you enjoy replacing header gaskets, use TTI headers.  Yes, they are the most expensive, but also the best.  Install and forget!
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Re: 318, 340, or 360?
« Reply #282 on: November 22, 2010, 09:33:05 »

I had Gibson headers on my Dakota (they would not fit an M body though).  They were first class, no gasket leak problems, nice and solid pieces.  But I reinstalled the factory manifolds when I was working on the truck because the headers resticted access to plugs and even the suspension I was rebuilding.  Performance was unchanged, MPGs went up with factory manifolds.  I'm glad I wasn't the one who spent the big bucks on those headers.
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Re: 318, 340, or 360?
« Reply #283 on: November 22, 2010, 10:38:33 »

In the 80's/early 90's, I used BlackJack Alumi-Coat headers on my F's. The d/s pitman arm ran though the pipes. Passenger side just dropped in. Can't say I ever had a problem w/ them.
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270SE

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Re: 318, 340, or 360?
« Reply #284 on: November 22, 2010, 11:34:18 »

But will it matter if they're coated or not. I'm honestly leaning towards a bigger name like hooker..simply because I know they are one of the top companies.
Yes it matters, if you want them to last more than a year or two. Just because the name is big, doesn't make the product better. Use header bolts, no studs.
And if they do last over that time period (they can), they will look aweful, even if they work great.
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