what i have in my 300-6 & Split Ex. Manifolds

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what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Thu Jan 03, 2013 12:36 am

hi, been lurking for years. really enjoy forum & all the info. i have a sickness for most all inline 6 engines. Fords, IHC, Slant sixes, Jaguars, Datsuns & others. Truck i have now, 83 F150 4X4 short box 300-6, NP435 , 3.55 axles. Block & Head 87 F.I. .030 over Hyp. cast pistons. block opened for mech. fuel pump. Cyl. Head pocket ported, Ex. port roofs, bumps ground smooth. Elgin camshaft ( like Isky Mile a more) Duraspark Dist., advance recurved. Hooked to GM HEI module, TFI coil. Offy D.P. intake, Trans Dapt 1 in. swirl port plastic carb spacer. New 390 Holley carb. ( changed to #37 pump nozzle ) 90? Dodge Truck V6 plasic AIr cleaner, with dual Ford snorkels. ( oval shaped, fits carb nice & clears Heater Box ) Exhaust Manifolds, Front F.I. & Rear is carb. type, with front 3 ports cut-off. Steel cap welded on using Stainless rod. Rear Man. bolted to intake, with working Heat Riser. 2.25 in. pipes to Ultra Flo Muffler. Single 3 in. straight out. Truck starts & runs very nice. Lugs like a Tractor, too much? Thinking of changing to ZF 5 speed or 3.08 axles. maybe later? a sportier camshaft. Thought i would share my build. Hope many here consider my Exhaust Manifold setup, it is WAY BETTER than running hot coolant to intake.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Luckyman » Thu Jan 03, 2013 1:44 pm

Very Creative. Very Interesting. Any possibility of posting photos of the exhaust manifold setup?

I got a dual snorkel air cleaner from a 90's Mustang GT (5.0 HO) for my Holley 4V on a DP. But the one snorkel had to be removed and the hole blocked because of clearance issues. But still looks great with the one snorkel (Older one from a 390) coming off to the right front.
1 "76" F150 RC, LB, 2WD, 300, NP435, 9" open 3.00, special order 2-76/Delivered 4-76. Still "new".

1 "73-79" F150 RC/SS/SB/4WD, "84"-300, T18, NP205, 9" open 3.50, Dana 44 3.50 open, Offy DP, Holley 470, EFI + single 2.5" exhaust. Gathered from 15+ donor/parts trucks. "Fubar". Runs good, safe, still needs details/project continues.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby 1986F150six » Thu Jan 03, 2013 3:08 pm

BIG 6 farmer wrote: Exhaust Manifolds, Front F.I. & Rear is carb. type, with front 3 ports cut-off. Steel cap welded on using Stainless rod. Rear Man. bolted to intake, with working Heat Riser. 2.25 in. pipes to Ultra Flo Muffler. Single 3 in. straight out.

Hope many here consider my Exhaust Manifold setup, it is WAY BETTER than running hot coolant to intake.


Wow! That is really thinking "outside of the box"! :D
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Thu Jan 03, 2013 3:36 pm

i do have pictures of all, And i will post them. Problem is, i have to bum this computer & my Girl needs to help me get pixs on here. might take a week or so, but it will happen. Im 25 miles from here, get online every 2-3 days. Thanks for the interest !
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Nashtooth » Fri Jan 04, 2013 12:19 am

How is your intake heat WAY BETTER? Have you done it both ways?
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Luckyman » Fri Jan 04, 2013 12:42 pm

Nashtooth wrote:How is your intake heat WAY BETTER? Have you done it both ways?


Dont mean to be a hijacker, but it might be a day or three before Big 6 Farmer responds. So, in the meantime I'll throw my experience in here while we await the way better explanation.

The intake heating process is much quicker with the intact heat riser valve directing warm/hot exhaust to the bottom of the intake vs. having to wait for the coolant to get hot enough to start making a differance inside the intake. Exhaust gives almost instantaneous heating vs. 5-10 minute warm up period for the hot water set up. I have two trucks. One, factory stock with intact heat riser and one with hot water plate under intake manifold and carb. The one with the heat riser is much more drivable much more quickly in cold weather than the one with the hot water plates. In a mild or warm climate it probably doesnt matter too much. But even in the summer time here in MT the stock set up has better instantaneous cold start drivability. After warmup however the water plate set up may deliver a cooler air fuel mixture.
1 "76" F150 RC, LB, 2WD, 300, NP435, 9" open 3.00, special order 2-76/Delivered 4-76. Still "new".

1 "73-79" F150 RC/SS/SB/4WD, "84"-300, T18, NP205, 9" open 3.50, Dana 44 3.50 open, Offy DP, Holley 470, EFI + single 2.5" exhaust. Gathered from 15+ donor/parts trucks. "Fubar". Runs good, safe, still needs details/project continues.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Harte3 » Fri Jan 04, 2013 2:03 pm

Yes,the water heated arrangement does take a bit longer. But when it is cold out and I know I'm going to be out and about I plug in the block heater at least 2-3 hours before firing up and driving. Works for me. I've used block heaters for some 30 years...and wouldn't be without them in a cold climate.
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Luckyman » Fri Jan 04, 2013 4:30 pm

Harte3 wrote:Yes,the water heated arrangement does take a bit longer. But when it is cold out and I know I'm going to be out and about I plug in the block heater at least 2-3 hours before firing up and driving. Works for me. I've used block heaters for some 30 years...and wouldn't be without them in a cold climate.


What Harte 3 said :thumbup: :thumbup: The block heater is great when I remember to go plug it in for an hour or three before I'm going to use the truck. Starts and runs like summertime.

But with out the block heater, the heat riser equipped truck starts and runs much easier on cold starts in winter.
1 "76" F150 RC, LB, 2WD, 300, NP435, 9" open 3.00, special order 2-76/Delivered 4-76. Still "new".

1 "73-79" F150 RC/SS/SB/4WD, "84"-300, T18, NP205, 9" open 3.50, Dana 44 3.50 open, Offy DP, Holley 470, EFI + single 2.5" exhaust. Gathered from 15+ donor/parts trucks. "Fubar". Runs good, safe, still needs details/project continues.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Fordman75 » Fri Jan 04, 2013 4:50 pm

The issue I see with this is the rear cylinders are still going to choked down by the stock manifold. The front cylinders are going to flow better then the rears. They will flow better then an intact carbed ex manifold, due to there only flowing 3 through it instead of 6. But it still isn't going to flow as well as a rear efi manifold. The difference might not be huge but it is a difference.

With less exhaust flow you will also have less scavenging. Which means you'll also end up with less air/fuel in the rear cylinders. Again I don't know if the difference would be enough to cause any issues, but it would still bug me knowing it. :lol:

But it is still a cool idea to the issue of intake heating. :thumbup:
Ted

54 Ford F100/F150 4x4
300, NP435 4spd, NP205 transfercase
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Mon Jan 07, 2013 12:05 am

Thank you Lucky Man, you nailed it ! As far as an engine Heater, when its below zero here in Nebr. I love em. about the rear manifold not flowing as well as the F. I. front? After smoothing around inside both, i think the difference is nil. There is a lot of open area @ heat riser. And now it only has to exhaust 3 cylinders. Remember we are talking about cast iron manifolds, not tuned tube headers. got my pictures wih me, get my gal to help me get em here. I dont mean to rub anyone wrong with this info. I really just want to help.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Nashtooth » Mon Jan 07, 2013 1:03 am

The more I think about this the better I like it. I think the water plate retards icing until the block and head heat up, which is about 15 minutes. Until then there's not a lot of heating happening. Including in the cab. We don't go below zero around here, but 37 degrees at 97 percent humidity is a chiller.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Fordman75 » Mon Jan 07, 2013 1:09 am

Hey man don't mind me. I didn't think any flow difference would be huge or cause any problems. Sometimes I just let some little stuff get me all paranoid. :roll: :lol:

Like I said you've got a cool solution to the heat riser issue. :beer:

I can't wait to see your picture/s of your set up. :thumbup:
Ted

54 Ford F100/F150 4x4
300, NP435 4spd, NP205 transfercase
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Mon Jan 07, 2013 1:43 am

Yes Fordman, those little things keep me awake at nite. Gives me comfort to know that others have the sickness too. Im 52, wish i wasnt so ignorant about a computer. I could share my photos. Mommas sleepin, hope she gets it done in morn.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Ford blue is all we do » Mon Jan 07, 2013 2:59 am

Big 6: I was wondering if you could post all the specs on your holley 390 setup? Just bought one off racing junk and was going to install with a Offy dual plane on a stock motor with exhaust headerand 2 1/4 glasspacks and DS II. Currently jetted #51 and #58, 25 squirter and white cam , 7.5 power valve, Purple secondary spring with quickfuel vacuum adjustable head. But needing some guidance before installation to shorten my learning curve. Thanks
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Mon Jan 07, 2013 3:48 am

My 390 Holley is new outa the box, Dont know whats inside. The part # is for the Offy DP set up, i know that. Did change squirter to #37 Back in the 80s, used to build carbs for Drag Racers. Slap it on & try it, might need work ? Jetting? close? might need 2-3 sizes bigger with Headers. Your pump shot to small. Purple spring, with adjustment top close? Power valve right for stock engine. DONT USE CHEAP BOWL GASKETS. Holley parts or better. First off you have to get HEAT to your intake manifold, or you will go insane trying to get it to run right. If you have not bought Headers yet, dont. You will have problems getting a good seal to Cylinder Head & tuning issues? Go get used F.I. Manifolds & run hot coolant to intake. Or better yet, make dual manifolds like mine. Have photos up soon. Thank you Ken
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby THE FRENCHTOWN FLYER » Mon Jan 07, 2013 2:25 pm

X2 what Big 6 farmer said. The biggest change needed for the 390 carb is a big squirter nozzle - like 37. Worked for me.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Ford blue is all we do » Tue Jan 08, 2013 3:15 am

Okay Thanks, A 37 squirter with what cam color. I bought an assortment off Ebay. I am at between 2800 and 3300 feet above sea level. (I forgot that part of the equation) Also thought the carb heat was not super critical until after it became cold with the headers on I found out how critical it is! :oops: So lesson learned there! The Offy has the hot water heat plate installed and ready to go. I purchased a SunPro 7011 which is an air/fuel ratio meter and Jeg's sold me a Denso #234-4127 sensor, Does anyone know if that is the correct sensor? Also what is the best way to install the carb? My truck linkage is pull to open and the way the carb goes on manifold it needs to be pushed? Thanks again for all the tutelage! Kyle
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Harte3 » Tue Jan 08, 2013 11:01 am

With an Offy DP the suggested carb orientation is with the primaries next to the engine.
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Luckyman » Tue Jan 08, 2013 1:03 pm

Harte3 wrote:With an Offy DP the suggested carb orientation is with the primaries next to the engine.


On mine, with primaries facing the head, I was able to rig the accelerator cable to pull on the the Holley from the bottom instead of trying to figure out how to push from the top. Requires a bunch of tweaking and adjusting of the cable bracket to get the alignment and pull just right but works well once sorted out.
1 "76" F150 RC, LB, 2WD, 300, NP435, 9" open 3.00, special order 2-76/Delivered 4-76. Still "new".

1 "73-79" F150 RC/SS/SB/4WD, "84"-300, T18, NP205, 9" open 3.50, Dana 44 3.50 open, Offy DP, Holley 470, EFI + single 2.5" exhaust. Gathered from 15+ donor/parts trucks. "Fubar". Runs good, safe, still needs details/project continues.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Harte3 » Tue Jan 08, 2013 1:55 pm

I used a Lokar cable routed around the front and pull from the top of the linkage toward the fender.
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby THE FRENCHTOWN FLYER » Tue Jan 08, 2013 2:32 pm

Ford blue is all we do wrote: Also what is the best way to install the carb? My truck linkage is pull to open and the way the carb goes on manifold it needs to be pushed? Thanks again for all the tutelage! Kyle


Add a bellcrank. That way you can change the pedal travel easily too.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Tue Jan 08, 2013 6:51 pm

on mine i made a heavy bracket mounting on manifold bolts. used factory cable for 1V Carb. installed ball stud on carb. to pull open. Working fine, so far.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Ford blue is all we do » Wed Jan 09, 2013 12:01 am

Okay Thanks For the help. If I ever get some days off I'm going to gather up some parts and see what I can tear up.
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Wed Jan 09, 2013 12:09 am

Ford blue is all we do wrote:Okay Thanks, A 37 squirter with what cam color. I bought an assortment off Ebay. I am at between 2800 and 3300 feet above sea level. (I forgot that part of the equation) Also thought the carb heat was not super critical until after it became cold with the headers on I found out how critical it is! :oops: So lesson learned there! The Offy has the hot water heat plate installed and ready to go. I purchased a SunPro 7011 which is an air/fuel ratio meter and Jeg's sold me a Denso #234-4127 sensor, Does anyone know if that is the correct sensor? Also what is the best way to install the carb? My truck linkage is pull to open and the way the carb goes on manifold it needs to be pushed? Thanks again for all the tutelage! Kyle
Sounds like your on your way, & doin fine. Pump cams are something to play with. ( it seems i liked the red ones ). as high as you are, & with your headers. 2-3 bigger jets, might be right on? Glad to hear you got coolant to intake. i know if you can rig up air cleaner to suck hot air off headers, it will run much smoother & keep carb from icing. unhook in summer time. A lot of oxygen sensors will interchange. from what i know, its mostly about how many wires. Heated or not. Call Jegs Tech. Line, they should know.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby sdiesel » Sat Jan 12, 2013 1:37 pm

Exhaust , very creative and clever.
I am using coolant for 2 reasons that i like over the heat riser

1, the manifold is plumbed that way, and..

2. the coolant at temperature is more consistent heat, never getting too hot.

3. i have a valve at the supply hose that i can limit the amount of coolant that passes into the manifold if , when its very hot i may not want to use manifold heat and allow the rising heat from the exhaust and ambient temps heat the manifold.
I also have a Fish carb that has a peculiar filter housing. on it i have a hose that can be directed to the exhaust manifold or directed out the fender depending on need and season.

That has been my solution. for what its worth.
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Sun Jan 13, 2013 3:14 am

Yes, i think for a Turbo build. coolant heat would be best. But, that would vary. depending on how truck was used & how cold it was outside. below 10? degrees
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Sun Jan 13, 2013 3:57 am

And thanks sdiesel on liking my exhaust manifolds. wont use that on my Turbo Engine, would leak @ intake heat riser ( under pressure). Like the idea of being able to turn on/off intake heat. Coolant or exhaust type.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby Ford blue is all we do » Tue Jan 15, 2013 12:25 am

Okay guys, thanks for all the advice. I was going to got the bell crank route but ran out of time to fab it up. So just made a bracket from old 1V cable mountafter welding the heads of two bolts together and bolting that to the manifold. While this took a little shimming it works well. Also, Installed air/fuel gauge using a cheaper sensor that was recomended off another site. It is a one wire instead of the four wire Jeg's sold me (again no time to run all the wires). It works as advertised after warming up. Shows to be running just one step away from Full Rich, this was in town driving then about 9 miles at 70. Will check mileage tomorrow on 148 mile trip to work an back. Manifold heater works better than great I guess the temperature tranfer abilities of aluminum help this also. Truck has higher vacuum at idle and runs WAAAYYYY better. Last bit of news is I used a air cleaner from a 1995 chebroleta C1500 with a 350 ci. Thanks again, Kyle
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Re: what i have in my 300-6 & Split Ex. Manifolds

Postby BIG 6 farmer » Wed Jan 16, 2013 12:03 am

Ford blue is all we do wrote:Okay guys, thanks for all the advice. I was going to got the bell crank route but ran out of time to fab it up. So just made a bracket from old 1V cable mountafter welding the heads of two bolts together and bolting that to the manifold. While this took a little shimming it works well. Also, Installed air/fuel gauge using a cheaper sensor that was recomended off another site. It is a one wire instead of the four wire Jeg's sold me (again no time to run all the wires). It works as advertised after warming up. Shows to be running just one step away from Full Rich, this was in town driving then about 9 miles at 70. Will check mileage tomorrow on 148 mile trip to work an back. Manifold heater works better than great I guess the temperature tranfer abilities of aluminum help this also. Truck has higher vacuum at idle and runs WAAAYYYY better. Last bit of news is I used a air cleaner from a 1995 chebroleta C1500 with a 350 ci. Thanks again, Kyle
Glad to hear your moving in good,happy direction. Take that Chevy air cleaner & suck only hot air off your Headers. That will help even more.
83 F 150 SB 4x4 300 six NP 4speed - 89 F 150 300 six Turbo (in works) - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) - My Gal ? Shes gone... New rule, keep the old junk. Trade the women in as needed !!!
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