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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 10-02-2010, 12:45 PM
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Domestic_Nuwbee Domestic_Nuwbee is offline
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302 EFI...Want more power!

Hey guys, I got a stock 92 302EFI in my 90 F250. I'm looking to get some more power out of it. Any suggestions? I don't want to be told to swap in a 351, as this motor has potential itself.

open to all kinds of suggestions!

Thanks,



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Old 10-02-2010, 01:03 PM
96ford250 96ford250 is offline
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search there is a millions threads on it but theres; 6 litre tune up, free flowing exhaust, I6/460 intake tube, SD friendly cam, 1.7 rockers, gt40 heads, motorcraft oil filter, auto light plugs, gap them, fuel filter, LT headers, and bump up the timing. theres so much stuff to do to these trucks just say away from cold air intakes they dont work and the I6/460 intake tube is a fraction of the price and works better. Dont waste your money on chips or spacers it wont do anything for you
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Old 10-02-2010, 01:11 PM
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Thanks 96ford250,

I know i can easily search for threads on this, but other guys want power for diff reasons, in diff ways in specific areas. I guess I'm just looking for something basic for some more gitty up n go. Your wisdom is being considered. Thank you.
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Old 10-02-2010, 01:18 PM
96ford250 96ford250 is offline
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the biggest problem is the SD system doesnt adapt well to changes so if ur gunna go crazy with it or go past a mild build ur gunna need to get it rechipped or switch to a maf set up
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Old 10-02-2010, 09:36 PM
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Quote:
Originally Posted by Domestic_Nuwbee View Post
Hey guys, I got a stock 92 302EFI in my 90 F250. I'm looking to get some more power out of it.
Put a HO cam in it with 1.7 rockers and add a complete exhaust system with longtube headers and you'll have lots more HP.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
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Old 10-04-2010, 11:36 PM
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Quote:
Originally Posted by Conanski View Post
Put a HO cam in it with 1.7 rockers and add a complete exhaust system with longtube headers and you'll have lots more HP.
Is the HO cam lumpier?! what does the 1.7 rockers do in comparison to what my motor has? I'm being told that by lots of ppl. Dual or single exhaust exit and how big?

I know I sound ridculously stupid, but I'm new to all this.

thanks guys,
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Old 10-05-2010, 08:32 AM
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Quote:
Originally Posted by Conanski View Post
Put a HO cam in it with 1.7 rockers and add a complete exhaust system with longtube headers and you'll have lots more HP.
If his 302 is the original with the 302 firing order wouldn't he have to swap the crank to a 302 HO crank with the 351w firing order to match the 351w firing order of the HO cam?
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1987 F-150 Custom: 4-Speed with Granny Low (Borg Warner T18), 4.9L 300 EFI (Rebuilt by Jasper in the mid 90's), 3.08 Gears, 4WD, 400K+ Miles (and still goin!) Daily Driver , AVG: 20 MPG() Highway
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Old 10-05-2010, 08:38 AM
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If his 302 is the original with the 302 firing order wouldn't he have to swap the crank to a 302 HO crank with the 351w firing order to match the 351w firing order of the HO cam?
No.. cranks are the same for both firing orders, and same goes for the injectors on batch fired SD trucks, Ford wires the injectors the same for both firing orders, so you can swap cams with either firing order into ths motor without any other changes.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
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Old 10-05-2010, 08:47 AM
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Quote:
Originally Posted by Domestic_Nuwbee View Post
Is the HO cam lumpier?! what does the 1.7 rockers do in comparison to what my motor has?
The HO cam(from a Mustang HO motor) is quite a bit larger, it produces 0.444 lift and 266 degrees duration on both intake and exhaust with the stock 1.6:1 rockers versus 0.379/0.395" lift and 244/256 deg duration from the truck cam. Adding 1.7 rockers increases lift to 0.472" with the HO cam. This cam is a direct swap into this motor and will really wake it up.. lots more mid and top end power.

Quote:
Originally Posted by Domestic_Nuwbee View Post
I'm being told that by lots of ppl. Dual or single exhaust exit and how big?
On a 5.0 a single 3" is plenty so if you go with duals make them 2-1/4" or 2-1/2" max to maintain some low end TQ.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
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Old 10-05-2010, 02:38 PM
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this is a spendy option if you use your 4wd, but gears would be an awesome upgrade. throw some 4.10s in there, and it will move a little quicker
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Old 10-05-2010, 02:44 PM
l67cooled l67cooled is offline
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Conanski, You caught my interest.


Does the HO cam need to be from a SD mustang engine? Will stock injectors keep up with the added power/ air intake? I'm pretty unfamiliar with the 5.0's so I may have a few dumb questions.
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Old 11-18-2010, 10:46 PM
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I just found out i have a 91 5.0 HO Cobra motor in the truck. ( did that come in 91 tho?!?! or 93? ) If I go with 1.7 rockers... what kind of problems will I encounter. Will I clear the valve covers?! how about baffling? I got about 100k on the motor, so if I upgraded to 1.7 rockers... will I need to upgrade my springs?

what does the swap from speed density - Mass air flow consist of?

I just want my truck to have some pull and decent top end. I understand that there is plenty I can do....just don't know where to start. Or what upgrade compliments the other. I guess it all narrows down to personal preference... but I come to you guys for the years of wisdom

Thank you!

Last edited by Domestic_Nuwbee; 11-18-2010 at 10:50 PM. Reason: Forgot!...what will E303cam do on my motor?
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Old 11-18-2010, 11:20 PM
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Quote:
Originally Posted by Domestic_Nuwbee View Post
I just found out i have a 91 5.0 HO Cobra motor in the truck. ( did that come in 91 tho?!?! or 93? )
Really? Who told you this and what proof do they have? No 5.0HO was ever factory installed in these trucks so you don't have one unless a previous owner swapped it in, and if they did you probably wouldn't be looking for more top end power, you would be wondering why your truck is so much faster than every other one of this vintage.


Quote:
Originally Posted by Domestic_Nuwbee View Post
If I go with 1.7 rockers... what kind of problems will I encounter.
If you buy the cast aluminum rockers the oil baffles inside the valve covers will have to be clearanced or they will hit the rockers, but otherwise there will be no problem.
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1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
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Old 11-18-2010, 11:39 PM
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Here is who im going to be going w/ for my Mass Air Conversion kit. Im sure others could enlighten you on how to do it cheaper but i don't feel like hunting down a ECU and digging out old existing wiring from a donor car or truck. Mass Air Conversion Kits « Dunne-Rite Performance

Here is another company i have been looking into going w/ also for the Mass air kit. Alil pricey but they have alot more options for you to choose from.
Interactive Systems & Technologies Mass Air Home Page

Good luck on your quest for more powa

Mario
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Old 11-19-2010, 12:40 AM
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Conanski,

I bought this truck from my brother in law, and he bought it from his coworker who is a Ford Junkie. Builds all his own vehicles and swaps motors out. In the 2yrs my bro in law owned it ( for towing boat ) he only used it 3 times. So I borrowed it once to go camping...and I could not believe how strong this truck ran! its pretty quick and pulls pretty hard. Mind you... this is coming from someone has owned nothing but Hondas and currently has a Jetta daily driver. Hence "Domestic_Nuwbee" I'm new to the v8 feild, so it all feels powerful. First time I drove it, fell in love. So I bought it off of my brother believing the potential it has. So i asked my bro to ask his coworker what they actual power plant of this truck was....ask him today actually. He said 5.0 Cobra...
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Old 11-19-2010, 12:40 AM
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