hi all. I have a 94 F150 with the 300 I6 with 208,000 miles on it. its currently at the shop getting a valve job. Ive heard that doing a port and polish on the 300 head will really wake it up. is that true? I figure that, why not do it now while the head is off. the bill is kinda up there already, so I was wondering if its worth the extra money. the truck has the E4OD trans with an 8.8" rear with a 3.08 ratio, if that matters.
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Brian L.ask for facebook
1994 F150 XL 2wd standard cab short bed 300 I6
E4OD trans 8.8 rear towing package with 3/4 ton springs linex bedliner safety rack cab guard
210,000+miles http://www.youtube.com/user/W12CO1
5 hp, maybe a little more, at WOT at peak rpm. Add long tube headers & a cam and it will wake up. From what I read here, that is about all you can ask the stock EFI to support. That moves your peak HP up the RPM scale too. If your combo is right, you keep your low-end torque.
On a 200k engine, IMO, I would not do a cam swap. If I had to do that much work, I'd rebuild it so all the bearings are new, it's clean, and any other issues, if any, are resolved.
If your engine was otherwise sound, run it.
What are they doing about the hardened valve seats?
thanks for the replies. 85e150six4mtod, that doesnt seem worth the extra money. I dont wanna risk losing any low end torque, I was actually hoping to gain some by porting. Ive heard the stock EFI head on the 300 is pretty restrictive, so I was hoping to free it up alittle. Im not sure what theyre doing about the valve seats, Im leaving it up to them.
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Brian L.ask for facebook
1994 F150 XL 2wd standard cab short bed 300 I6
E4OD trans 8.8 rear towing package with 3/4 ton springs linex bedliner safety rack cab guard
210,000+miles http://www.youtube.com/user/W12CO1
Mild porting...cleaning up the casting flash, humps and bumps, etc. Port match so that any ledges sticking out in the downstream flow are removed and blended in.
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1983 F150 300 I6, Comp Cam 260h and lifter kit, Port/Polished head, Offy DP Manifold, Holley 4160/1848-1 465 cfm, EFI Exhaust manifolds, Walker Y Pipe to 3-Way Cat, generic Turbo Muffler, Recurved DSII, Mallory HyFire 6a & ACCEL Super Stock Coil, Taylor Spiro Pro Wires, EFI plugs.
the EFI head suffers from shrouding on the intake valve, minimizing advantages on porting and polishing. if you have the valve unshrouded you will see some improvement, but lose some of the swirl effect. i'd vote for a mild port and polish, and consider having the head decked. doing so will increase your compression and boost your output, although not by a huge amount. port matching is a great idea, and while you're reassembling, consider improving your valvetrain. some disagree, but i've always believed that a good roller vavletrain is worth the investment, in horsepower, torque, "smoothness," and decreased wear on the rest of the engine.
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If it ain't broke, you ain't worked it hard enough...
thanks for the response folks. Ive decided to not have the head ported and polished at this time.
__________________
Brian L.ask for facebook
1994 F150 XL 2wd standard cab short bed 300 I6
E4OD trans 8.8 rear towing package with 3/4 ton springs linex bedliner safety rack cab guard
210,000+miles http://www.youtube.com/user/W12CO1
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