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  #16 (permalink)  
Old 01-08-2009, 12:44 PM
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In defence of 300 inline motor & their fuel economy

I have 1981 F250 4x4 550k+ replaced original 300 with one that ran on more than 3 cylinders and had only 17ok on it. Truck got 10-12 mpg I am very good at tuning engines and it now get 17 cty, 20+hwy I believe my next test will yield 22 hwy have to wait and see. Bought magazine where they test all the new trucks. They tested the new 1/2 ton truck even toyota and nissan not own of the half tons used less gas than my truck except the gmc hybrid beat me in city mileage but not on the freeway. My truck is 3/4 ton no,over drive, no fuel injection, 4.10 gear ratio which was is shorter gear than any truck tested. Dodge ram1500 14/20 NewF150 14/20 Gm 1500 14/20
Gm hybrid 21/22 Nissan titan 13/18 Toyota tundra 14/18 O LOOK IMPORTS USE LESS FUEL, NOT! Results as stated in Motor trends Truck trend Jan/feb 2009

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  #17 (permalink)  
Old 01-08-2009, 01:19 PM
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What brought this to life, the thread is over 5 years old, and these posts have no technical merit, moving to the Basics Forum.
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Old 01-08-2009, 03:59 PM
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replay

I had not looked the date on the posts. and just felt like sharing some of the experiences I had with some of the different engines.
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Old 01-08-2009, 07:26 PM
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Oh, nothing wrong with that, I was just surprised to see the thread was that old. Have a good day and weekend.
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  #20 (permalink)  
Old 05-27-2009, 05:15 PM
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There are lots of performance parts for a 300ci. They make 4b intakes,exhaust headers,after market cams,new reworked heads and you can upgrade the ingiton.
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Old 01-24-2011, 12:54 PM
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good info, even if old... but:

Quote:
Originally Posted by asa67_stang
sorry to bring up an old topic, but i just got here and felt that it needed to be said

there are many, many things that can be done to the big six ford, as has been said earlier, the 300 is a torque machine and with a little work it can be made even more potent

i mainly hang out at a Fordsix forum
Hi,

I'm new to this site and doing lots of research for my 300 six (96 pre-runner which had EFI until yesterday). I am making a "1450 truck" out of this, and the wiring is a NIGHTMARE thanks to the original builders (I bought it salvage, believe it or not).

Anyway, first race went 11 miles and lost all spark. I said "that's it"! So I jerked out the 150 lbs or so of stock intake, exhaust, and cad. converter, but probably should have started shopping sooner.

I already bought Clifford headers, and the guy running the company was very nice to me and got me pretty exited about keeping this motor. Previously I was ready to scrap it, even though my very first 79 F-150 had a carb'd version of this motor and I loved it... but this is a RACE truck!

Well anyway, I really like the idea of the clifford intake with dual webers, but I'm on a budget and started shopping for other options.... PLUS... in extreme dirt and awful terrain, having multiple carbs sounds like more crap to go wrong. Maybe I'm incorrect here.

So; two things:

1) The guy I spoke to at classicinlines.com (the sponsor of "fordsix" which you mention above), does not make "many parts for the big six", and even said he "has never built one and specializes in the small 6". I went... "uh, ok, is there an intake you CAN recommend?". He said "no". All of a sudden I'm less enthused about this motor again.

2) Could anybody give me any feedback on the Offenhauser intakes (or even the Clifford cast aluminum one? If I can spend 300 bucks for a dual-plane intake and another 300 or so on a single carb (or even steal it off my other race truck to see how it does)... it's a WIN for me. Again, I like the idea of the Clifford intake and dual webers, it looks awsome (but suspension is more critical for me right now, and my budget it too tight to drop the $1,319 bucks for the intake, carbs, and linkage.

Thanks for any feedback or thoughts.

My truck is a long-travel front, deaver-leafed rear, with a manual 5 speed. Gearing isn't an issue right now, with 5 gears to choose from. If anything, I'm probably too low with 4:88's. I have King shocks all around, and putting on king bumps right now.
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  #22 (permalink)  
Old 01-24-2011, 12:59 PM
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Quote:
Originally Posted by kwlskeeter
Hi,

I'm new to this site and doing lots of research for my 300 six (96 pre-runner which had EFI until yesterday). I am making a "1450 truck" out of this, and the wiring is a NIGHTMARE thanks to the original builders (I bought it salvage, believe it or not).

Anyway, first race went 11 miles and lost all spark. I said "that's it"! So I jerked out the 150 lbs or so of stock intake, exhaust, and cad. converter, but probably should have started shopping sooner.

I already bought Clifford headers, and the guy running the company was very nice to me and got me pretty exited about keeping this motor. Previously I was ready to scrap it, even though my very first 79 F-150 had a carb'd version of this motor and I loved it... but this is a RACE truck!

Well anyway, I really like the idea of the clifford intake with dual webers, but I'm on a budget and started shopping for other options.... PLUS... in extreme dirt and awful terrain, having multiple carbs sounds like more crap to go wrong. Maybe I'm incorrect here.

So; two things:

1) The guy I spoke to at classicinlines.com (the sponsor of "fordsix" which you mention above), does not make "many parts for the big six", and even said he "has never built one and specializes in the small 6". I went... "uh, ok, is there an intake you CAN recommend?". He said "no". All of a sudden I'm less enthused about this motor again.

2) Could anybody give me any feedback on the Offenhauser intakes (or even the Clifford cast aluminum one? If I can spend 300 bucks for a dual-plane intake and another 300 or so on a single carb (or even steal it off my other race truck to see how it does)... it's a WIN for me. Again, I like the idea of the Clifford intake and dual webers, it looks awsome (but suspension is more critical for me right now, and my budget it too tight to drop the $1,319 bucks for the intake, carbs, and linkage.

Thanks for any feedback or thoughts.

My truck is a long-travel front, deaver-leafed rear, with a manual 5 speed. Gearing isn't an issue right now, with 5 gears to choose from. If anything, I'm probably too low with 4:88's. I have King shocks all around, and putting on king bumps right now.
This thread started back in 03 and the person you quoted hasen't been back since 05. Unless someone else sees this you need to start another thread on what you are asking. JMO


Cole
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  #23 (permalink)  
Old 01-24-2011, 02:38 PM
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Quote:
Originally Posted by eloc431962
This thread started back in 03 and the person you quoted hasen't been back since 05. Unless someone else sees this you need to start another thread on what you are asking. JMO


Cole

Probably right, but on other forums when I've started a new thread on an old topic, they refer me back to the old thread like I haven't done my homework!

thanks, tho!
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  #24 (permalink)  
Old 01-24-2011, 03:01 PM
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Quote:
Originally Posted by kwlskeeter
Hi,

I'm new to this site and doing lots of research for my 300 six (96 pre-runner which had EFI until yesterday). I am making a "1450 truck" out of this, and the wiring is a NIGHTMARE thanks to the original builders (I bought it salvage, believe it or not).

Anyway, first race went 11 miles and lost all spark. I said "that's it"! So I jerked out the 150 lbs or so of stock intake, exhaust, and cad. converter, but probably should have started shopping sooner.

I already bought Clifford headers, and the guy running the company was very nice to me and got me pretty exited about keeping this motor. Previously I was ready to scrap it, even though my very first 79 F-150 had a carb'd version of this motor and I loved it... but this is a RACE truck!

Well anyway, I really like the idea of the clifford intake with dual webers, but I'm on a budget and started shopping for other options.... PLUS... in extreme dirt and awful terrain, having multiple carbs sounds like more crap to go wrong. Maybe I'm incorrect here.

So; two things:

1) The guy I spoke to at classicinlines.com (the sponsor of "fordsix" which you mention above), does not make "many parts for the big six", and even said he "has never built one and specializes in the small 6". I went... "uh, ok, is there an intake you CAN recommend?". He said "no". All of a sudden I'm less enthused about this motor again.

2) Could anybody give me any feedback on the Offenhauser intakes (or even the Clifford cast aluminum one? If I can spend 300 bucks for a dual-plane intake and another 300 or so on a single carb (or even steal it off my other race truck to see how it does)... it's a WIN for me. Again, I like the idea of the Clifford intake and dual webers, it looks awsome (but suspension is more critical for me right now, and my budget it too tight to drop the $1,319 bucks for the intake, carbs, and linkage.

Thanks for any feedback or thoughts.

My truck is a long-travel front, deaver-leafed rear, with a manual 5 speed. Gearing isn't an issue right now, with 5 gears to choose from. If anything, I'm probably too low with 4:88's. I have King shocks all around, and putting on king bumps right now.
I'm not sure of the rules you're saddled with, but in some 1450 classes, the only engine restraint is that the engine has to have been available in the truck that's being raced. This would obviously put you up against V8's. If that's the case, I cannot see the 300 cid straight 6 being competitive, w/o a LOT of work.

Getting back to your questions, you already have a header, so in for a dime, in for a dollar at this point, right?

For a 4-barrel carb, I would favor a 390 cfm Holley. This is IF a 4-barrel was needed. BIG "if".

In your case, I would prefer a 2300 Holley 2-barrel. They're used extensively for off road racing, there are tons of tuning parts available, they're available in the aftermarket in 350 and 500 cfm. Even the 350 cfm would be plenty of carb for a basically stock 300 Ford 6.

At this stage I wouldn't worry all that much about the manifold, as long as it can be made to mount the carb. Sure, there's more power to be had in an aftermarket intake- but the cost-to-benefit ratio is outside of what I would be willing to deal with.

I would suggest this:

Get the engine running on a carb, preferably a 2-barrel on the OEM intake w/an adapter, if possible- or swapping out for an older intake that took a carb.

You will also need an earlier distributor in all likelihood. Get it dialed in w/as an aggressive of a timing curve as the engine will allow- this alone is often worth more "real world" usable power than anything else you might do, short of a cam or head work, etc.- and costs virtually nothing.

Once you're up and running, you will soon be able to tell if another 15-25 HP (about the max of what you could expect from a different intake/carb) will make enough difference to have you competitive. If nothing else, the engine can be used to acclimate you to the track and to help you dial in the suspension (which is also worth a lot of performance, but is beyond the scope of this post).

You might can tell I'm somewhat out of my element here (putting it mildly ), so take my words w/a salt shaker- this is more food for thought than any hard, fast recommendations to you as I'm sure you're aware.

In any event, I applaud you taking the road less traveled. Who knows, you might start a trend!
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Old 01-24-2011, 06:30 PM
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One of the more desirable engines for an older Ford PU is a 410, a 390 FE with the 428 crankshaft. It gives you an engine with a 4.050 bore, and a 3.98 stroke.
The inline 6 has a bore of 4.00, and the same 3.98 stroke.

So essentially you have 3/4 of a 400 inch V8. I think I would leave the 300 six in the truck. I think it would be a step backwards to replace it with a 302.
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Old 01-25-2011, 12:38 PM
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Quote:
Originally Posted by DanielC
I think I would leave the 300 six in the truck.
Thanks guys!

A little bit more background. 1450 is sort of a "sportsman class" without any rules (well, it depends who you ask). There are guys in Fords running chevy motors and nobody is policing anything right now, and that's fine with most of us.

I have been racing for 10 years, but in a full-size Bronco with a mildly-built 351. I acquired this truck CHEAP with some good stuff on it, but I don't have the dough to build another 351.

I also like the idea of the light motor and weight/horse-power ratio (especially the low-end torque I keep hearing about).

I may not be all that competitive, but last year, 71 trucks showed up at the biggest race of the year (Battle at Primm, NV)... www.snoreracing.net.). At the end of the two days, only 15 trucks got enough laps in on both days to get a "finish". There are a LOT of roll-overs and more break-downs... so if I use my racing experience and a mild powerplant, I could at least make a showing...

It's also the first race of the year, so I need to start now and get some points without spending a lot of $$.

SO... I ordered the Offenhauser dual plane intake and a Mallory Unilite that I've been told by mallory and Clifford will work. This will be my interim solution. As for carb, I'm going to pull the Holley Street Avenger off my Bronco (it needs to come off anyway since I just realized it's parked under a tree and some idiot took the aircleaner off (me). I will put this Holley on and see how it runs. I think it's a 650, but not sure. My dad bought it for the race team but has since passed away.

Let's see how it runs with the intake, headers, Unilite, and my other holley.

Thanks again for the input above!
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  #27 (permalink)  
Old 01-27-2011, 03:21 PM
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Motor mounts don't fit the 300 L6? 1995

So I went to two places, AutoZone and Carquest, and bought passenger side motor mounts. They are both a bit cheesy, and who knows... maybe are made by the same people (different packaging of course)...

The are off by over an inch on the top (of three) bolts. The bottom two line up... but the top one isn't even close!

thoughts?
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  #28 (permalink)  
Old 01-27-2011, 07:03 PM
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Might not even be the right part.

2 bolts and a bead ought to hold it fine. Or just drill the extra hole, if it's not too hard to get to the underside to tighten it. But I would weld it and be done.
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  #29 (permalink)  
Old 01-27-2011, 11:05 PM
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Quote:
Originally Posted by cobalt327
Might not even be the right part.

2 bolts and a bead ought to hold it fine. Or just drill the extra hole, if it's not too hard to get to the underside to tighten it. But I would weld it and be done.
Thanks! I was tempted... but decided to hit up NAPA. The one they sell is right... even the "angles" of the lower bolts didn't seem quite right on the other ones. After looking at the Autozone one and the Carquest one, I'm very sure they are made by the same company, probably in a bad batch with wrong specs or something, made overseas I'm sure.

Napa doesn't have the warranty, but they don't seem to sell as much cheap crud either. Kinda like Harbor Freight.... there is a time and a place for cheap tools, but you get what you pay for!

I'll know tomorrow if the Napa one fits, but it looks way better when compared to the old one. I even bought the driver-side because they look way beefier than the other ones I had purchased.
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Old 06-03-2011, 01:18 PM
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the 300 in line 6 has more horse power then the 302 it is well worth fixing my 78 has the in line 6 in it and it has out run my moms 87 with the 302 many many times trust me
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