Help choosing intake manifold
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Help choosing intake manifold
In the summer of next year im planning on redoin the engine in my truck, nothing over the top. I wanna build it for low to mid range since it will be a daily driver with occasional fun but its a truck so i dont need the power up high, just off the line.
Heres a list of parts i got in mind:
cam...already picked out
long tube headers
free flowing dual exhaust with race mufflers, no cat
GT-40 cylinder heads
Thats the extent of the main stuff. so knowin that now i need help finding a intake manifold to replace the stock one.
BTW this is a 302 fuel injected in a 86 f150.
Heres a list of parts i got in mind:
cam...already picked out
long tube headers
free flowing dual exhaust with race mufflers, no cat
GT-40 cylinder heads
Thats the extent of the main stuff. so knowin that now i need help finding a intake manifold to replace the stock one.
BTW this is a 302 fuel injected in a 86 f150.
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From: The blues
FYI, I've heard that people have been disappointed with the gt40 intake and heads combo in their trucks though. Which ever intake you get it'd be a good idea to port match it to your heads. And get a 1" plenum spacer to lengthen your runners creating more velocity and low-rev torque.
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The stock mustang 5.0HO intake is what you want with a 1" spacer and the lower port matched to the heads. If your desired powerband band is 0-4000rpm you want a small intake and small port heads... like the stock heads. You can port the exhaust side but leave the intake side alone, and then use a high lift RV cam like the Comp 31-255-5. This combo will be 40-60ft lb stronger than the GT40 parts below 3000rpm.
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From: The blues
We were just debating this on another thread, check it out
https://www.ford-trucks.com/forums/7...ormance-2.html
https://www.ford-trucks.com/forums/7...ormance-2.html
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Ok ill keep my stock heads. Now what is meant by porting the exhaust side of them? And also what do you mean by matching the intake to the heads?
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Porting the heads means using a grinding tool like a dremmel or die grinder and a carbide bit to remove material from the port. It's easy to do but even easier to do wrong so it's not something you want to go into blindly, you need to do some research on what these heads need. Port matching is much the same but in this case involves matching the dimensions of the port opening in the lower intake to that in the head. It's common for the intake port opening to be smaller than the head port openings and this hurts overall airflow. Both these proceedures are time consuming and tedius, you could spend an hour or more on each port no problem.
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They're rectangular..not quite square, but the shape has very little to do with how well they flow.
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im not sure what size the ports are on the headers i want because they dont tell me on the site but if there oval, would it be more benecial to use the dremel or whatever to make em match the heads?
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Also I have been looking on summit for mustang intakes and was wondering, which would be better suited for my truck? a operating range of "idle to 5500" or "1200 to 5200"? Id have to guess idle to 5500. Another thing, what is the main difference from a mustang intake and a truck intake if they both have the same operating range.
For an example: summitracing.com
there both the same brand of intakes and same basic range.
For an example: summitracing.com
there both the same brand of intakes and same basic range.
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From: The blues
The operating range in the pick-up and mustang require different performance needs because of the roughly 1 ton difference. The mustang will require less torque(wider cross section runners), and be set-up to rev faster i believe. while the truck intake probably has longer runners with a smaller cross section to get more torque. The extra torque will allow the truck to operate in the same range as the mustang.
Whereas if you had the mustang intake you'd probably need to rev the engine a lil bit higher in order to achieve the same amount of torque as the mustang. This would result in poorer gas mileage and less driveability, however you'd have a nice top-end. But Top-end isn't nearly as important in a daily driver/off-road vehicle as it would be in a street/strip vehicle.
Whereas if you had the mustang intake you'd probably need to rev the engine a lil bit higher in order to achieve the same amount of torque as the mustang. This would result in poorer gas mileage and less driveability, however you'd have a nice top-end. But Top-end isn't nearly as important in a daily driver/off-road vehicle as it would be in a street/strip vehicle.
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From: The blues
Oh your link doesn't take me to a product, but since i think the only truck intake on summit is edelbrock and i'm pretty sure i remember what they look like there's another down fall to the mustang intake.
It has only 1 throttle body opening and is centered on the plenum, this would require a new TB, TB throttle cable bracket, possibly new throttle cable, new intake ducting, and maybe even a new filter. And if your staying smog legal then a mustang egr spacer between the TB and intake opening. And then it'd be best to get the 1" spacer for it.
Just IMO, it's more work, time, and money than it's worth.
It has only 1 throttle body opening and is centered on the plenum, this would require a new TB, TB throttle cable bracket, possibly new throttle cable, new intake ducting, and maybe even a new filter. And if your staying smog legal then a mustang egr spacer between the TB and intake opening. And then it'd be best to get the 1" spacer for it.
Just IMO, it's more work, time, and money than it's worth.