Need help beefing-up my 300-6.
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Joined: Jun 1999
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Need help beefing-up my 300-6.
I got a problem. I want to make my 300-6 to get around 230 horses, or even 210 would be nice, but theres a problem... its FUEL INJECTED!! Witch really limits what I can do. Plus, I cant find any place that really offers performance products for the 300-6. So far I took off the cat and put a glasspack on. That should have added 5-10 horse. Any help or comment would be appreciated greatly.
Thanks.
Thanks.
Junior User
Joined: Jun 1999
Posts: 98
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From: San Ysidro
Need help beefing-up my 300-6.
I was in the same dilema you are, and i convert my 87 Bronco to carb, that was really simple, just buy a carb and intake from a yonk yard, the only trouble was fitting the passingear, but i solve it by makeing it a custom suporter, then i put a dual muffler, and i was thinking about buy headers and
a four barrel carb and intake....but....that was running over $1000 so i make numbers, and i decide to go and make a engine swap, and now i'm running a 302, and i'm realy a lot more happy with it, it sucks just a little bit (about 1 MPG less than the 300)more gas but it realy runs a lot more.
hope this help.
a four barrel carb and intake....but....that was running over $1000 so i make numbers, and i decide to go and make a engine swap, and now i'm running a 302, and i'm realy a lot more happy with it, it sucks just a little bit (about 1 MPG less than the 300)more gas but it realy runs a lot more.
hope this help.
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Need help beefing-up my 300-6.
There are several things you could do to your 300. Not sure what year it is, or how much money your willing to put into it, but, the factory 92 300's have about 150 horsepower. Obviously a cam, will add some hp. If your interested in keeping the EFI, think about a MSD ignition, A K&N filtercharger injection kit adds about 19% more power. Headers also add, hypertech powermodule's add hp.
IT ALL DEPENDS ON HOW MUCH $$$$$ YOUR WILLING TO SPEND!
IT ALL DEPENDS ON HOW MUCH $$$$$ YOUR WILLING TO SPEND!
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Need help beefing-up my 300-6.
I can't find very many suppliers of perf parts for the 4.9L. I have found a company called Hypertech. They have a perf chip that you can add and a reprogrammer for the speedo and rev limit. The only other thing I could suggest would be to put a high flow air filter or filter assembly such as K&N on your motor. I have been told that the 4.9's are famous for not being able to breath enough. Another thing would be to put a step higher plug in that is one step hotter than the original. Make sure you have a good e-coil and wires to get that spark to the engine. I have noticed with my truck that if I run 93 oct gas in it it runs better too. Its a little expensive with dual tanks but I think the power is worth it. Good luck. Bruce Hartman
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Need help beefing-up my 300-6.
Hi, Have you tried Clifford Performance? They are the 6 cyl. gods. I'm in the process of building a carbed 300 for my 81 F-100. My dad had a 92 F-150 4x4 with a 300. He tried a Flowmaster cat-back system & a K&N airfilter. He said that it did make an improvement. After the mods he towed a 20ft.car trailer with a 65 442 & numerous parts from S.Carolina to S. Dakota with no problems. You shouldn't need headers because that year truck should have factory split ex.manifolds(just like headers). A high flow cat. converter would probably help also. Write back if I can help any further.
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Need help beefing-up my 300-6.
Robert,
Can you tell me which year modle 300 engines used the split exhaust manifold. Can you put it onto older heads and blocks? Do you happen to have one laying around or how much should I be expected to pay for one in a junk yard?
Thanks,
Gerald
Can you tell me which year modle 300 engines used the split exhaust manifold. Can you put it onto older heads and blocks? Do you happen to have one laying around or how much should I be expected to pay for one in a junk yard?
Thanks,
Gerald
Senior User
Joined: Jun 1999
Posts: 121
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From: Eveleth, MN
Need help beefing-up my 300-6.
they are really plugged up from tht factory. Mine happens to be carbed but I managed to get 230 HP out of it, and 340 ft.lbs of torque. I didn't lose and MPG either. I spent about $1500 on mine(included master rebuild kit) About $200 for the offy intake, $225 for split hooker headers, $250 for holley 390cfm carb, 500 for engine kit with comp cam kit, and another 250 on engine machining. I wish I would have went with a bigger carb, the 390 cfm runs out of "flowage" at about 3500rpm. With the engine built like this the machinist told me It would redline at 6000rpm! oh ya, and another 40 bucks for a K@N filter. next up is a msd6 ingnition. This engine will push my 4500 pound Bronco down the 1/4 mile in the low 17's@77mph, use to run mid 20's@62mph. and will 0-60 mph in 10 seconds instead of 18 seconds
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Joined: Jun 1999
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From: Eveleth, MN
Need help beefing-up my 300-6.
I found then in the "JEGS" catalog.......
Another thing I figured out is that you should run a single exaust right after the headers, it added a little more kick at the bottom end and maintained the top end power (dual 2.25" into a 3" single pipe through a big block series flowmaster and out the stock position.
Another thing I figured out is that you should run a single exaust right after the headers, it added a little more kick at the bottom end and maintained the top end power (dual 2.25" into a 3" single pipe through a big block series flowmaster and out the stock position.
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Need help beefing-up my 300-6.
My '91 F-150 has this combination: Clifford "Street Rod" headers which are two sets of unequal-length 3-into-1 headers ((Jet-Hot coated and ordered from Clifford with smog hookups); a custom stainless steel 2.25-in. dia. "Y" piping into an GM "E-Body" 3-inch high-flow catalytic convertor from Random Technologies into Gibson 3-inch cat-back system. Pulls extremely hard in any gear; just remember, these are real truck engines, designed for low-rpm torque, not high-winder car motors transplanted into a pickup. The above modifications will enhance that capability.
Ed
Ed
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Joined: Feb 2000
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Need help beefing-up my 300-6.
Hey Fast Eddie, i didn't know how much of a difference that kind of a setup made. I've been looking for a modification like this. Can you tell me how much it costed you for the parts and installation? Also, will it pass smog in California and how will effect my Gas milage?
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