โAug-15-2004 01:22 AM
โJul-04-2011 12:04 PM
โJul-03-2011 11:33 AM
Griff in Fairbanks wrote:Thanks And yes I can get the Doug Thorley headers and your right on the HP increase with the Tri-Y that Doug has come up with, I dont really want to spend $895 on a set of them unless I really have to, I'm hoping I can find a good set of shorties and spend the extra money on a new Intake Manifold and carb.oldtrucker63 wrote:
Hey anyone here know the part number for a set of headers or a web-site where I can order a set, It is a 1979 Dodge 440 with the 727 trans And it's the M400 chassis, I'm hoping someone has already changed there's and know's the set that is direct bolt on.???...Thanks.
The problem is RPMs ... most headers are designed for high RPM engines for race tracks and drag strips. Our vehicles operate at low RPMs, making most headers only marginally effective or even counterproductive.
The exception is Tri-Y headers, such as those made by Thorley, which are designed to boost horsepower and torque in the low to mid-RPM ranges. However, finding a set can be difficult and somewhat expensive.
I recall an article, I believe it was in Streetrodder magazine, that compared various headers and stock manifolds. For our applications, stock manifolds were almost as effective as any of the headers. (They only tested commonly available headers so Tri-Y headers weren't included in the comparisons.)
Dodge made a set of high performance manifolds for the B/RB blocks back in the 60's that might be a consideration, if you can find a set. Clearance may be a problem because those manifolds swept UP and back instead of straight down.
Based on everything I've read (and recall), the most cost effective improvement would be to leave the stock manifold in place and install a dual exhaust system with an H or X crossover.
Having said all that, I intend to go with Tri-Y headers on MLP, with dual exhaust including a X crossover. If I have to, I'll have a set custom made. (I'm "pushing the envelope" on this project and am willing to pay the extra cost.)
โJul-03-2011 11:27 AM
chinook440 wrote:Thanks Just by looking at the photo of the summit racing headers the 79820's look like they will fit, I think the $429 price tag is a bit to high, Maybe I can find some a Bit cheeper than this, The block huger type would have to come out more to the rear on the right side anyway, The way they come out would be right on top of the A frame on the passenger side, The driver side this would work.
The only ones i know of that say they fit the 79 bigblock vans are the expensive thorley headers which from reading your other post you already know.
Besides those... these 2 hedman models say they fit the bigblock B series vans up to 78
http://www.summitracing.com/parts/HED-79820/
http://www.summitracing.com/parts/HED-79220/Application/?query=Model|B300
not sure what,s different on the 79,s but those might be able to work for you ? Summit is real good about excepting returns as long as you don,t modify them.
These shorties might work also http://www.sandersonheaders.com/Sanderson-DD2-Chrysler-383-440-V8-Blockhugger-Header-Set.html
They show that they stick out from the head 3 3/4" which might be to tight ?
Good luck
โJul-03-2011 09:15 AM
oldtrucker63 wrote:
Hey anyone here know the part number for a set of headers or a web-site where I can order a set, It is a 1979 Dodge 440 with the 727 trans And it's the M400 chassis, I'm hoping someone has already changed there's and know's the set that is direct bolt on.???...Thanks.
โJul-03-2011 07:50 AM
โJul-03-2011 06:59 AM
โJul-02-2011 06:51 PM
โJul-02-2011 06:38 PM
Leeann wrote:
There is a core on mine - my parts guys don't charge me for it unless I tell them I'm not turning it in. So I need to get that booster installed and the core back to them.
โJul-02-2011 06:31 PM
โJul-02-2011 06:01 PM
โJul-02-2011 05:45 PM
โJul-02-2011 05:42 PM
Leeann wrote:
I got a reman Cardone from my local parts house. When I find the receipt (or get the energy to go out to the RV and write it down from the box), I'll get the part number. It's a 54- something.
I had the Dodge p/n and Griff got me the Carquest p/n that included the master cylinder (they don't do that any more), but both numbers crossed to the same bare booster.
โJul-02-2011 05:13 PM
โJul-02-2011 03:42 PM
Leeann wrote:
Life is good ๐
I have the Bendix medium and heavy duty catalogs, which don't mention the RM300, and the light duty catalog, which doesn't mention the boosters. Duh.
โJul-02-2011 03:37 PM
ALnCORY wrote:
Yeaaaaaaaaaaaaaaaaa!!!!!!!!!!! Trish is back.... my only question is will you still be able to wear your cool boots when you're all healed up?