351 needs more power
Former Vendor
Joined: Apr 2019
Posts: 279
Likes: 3
From: Shawnee KS
If you increase injector size without compensating for that change in any way, it will give it that much more fuel under all conditions (not good). So if you go from 19lb to 24lb injectors for instance (a 20% increase), it will give it 20% more fuel at idle, cruise, wide open throttle, etc. There is a little variance here as the o2 sensor has a smaller % of authority to pull some of that fuel back out of it but it can't compensate for anywhere near 20% more fuel.
Put another way, it would be like increasing all of the jets in a carb by 20%, not just the main jets.
Put another way, it would be like increasing all of the jets in a carb by 20%, not just the main jets.
Thread Starter
|
Junior User
Joined: Oct 2019
Posts: 96
Likes: 0
If you increase injector size without compensating for that change in any way, it will give it that much more fuel under all conditions (not good). So if you go from 19lb to 24lb injectors for instance (a 20% increase), it will give it 20% more fuel at idle, cruise, wide open throttle, etc. There is a little variance here as the o2 sensor has a smaller % of authority to pull some of that fuel back out of it but it can't compensate for anywhere near 20% more fuel.
Put another way, it would be like increasing all of the jets in a carb by 20%, not just the main jets.
Put another way, it would be like increasing all of the jets in a carb by 20%, not just the main jets.
Thread Starter
|
Junior User
Joined: Oct 2019
Posts: 96
Likes: 0
but in finding all the complicated stuff im going to have to do im starting to give up on the 96 ive also a 77 f150 with a 351 im thinking of building it instead can do alot more to those older ones also im way more comfortable working on older stuff whats your guys opinion build the 96 or the 77?
Logistics Pro
Joined: Aug 2014
Posts: 3,572
Likes: 855
I would keep it cheap and simple, stick to your goals and the basics.
You want more power, great, keep it realistic to your budget.
What is your budget?
I have similar motor, 1994 351w, SD. First I bought quarter horse for tuning, that is in the budget $250.
Pimpx, not my style, specially when I advertise what I run, don't want 'PIMP' anything on my truck, then there's the cost, outside of budget.
Good intake, heads, cam, exhaust headers, will get you closer to your goal.
To really feel the mods, you will have to change your gears. Being an overdrive trans, depends on hwy driving. 4.10s would be great, 3.73(2) would be better than 3.55.
For me, new heads are out of budget, so, I'm porting the ones that I have, lots of write ups.
For any build/mods, you need a realistic budget, and stick with it.
You want more power, great, keep it realistic to your budget.
What is your budget?
I have similar motor, 1994 351w, SD. First I bought quarter horse for tuning, that is in the budget $250.
Pimpx, not my style, specially when I advertise what I run, don't want 'PIMP' anything on my truck, then there's the cost, outside of budget.
Good intake, heads, cam, exhaust headers, will get you closer to your goal.
To really feel the mods, you will have to change your gears. Being an overdrive trans, depends on hwy driving. 4.10s would be great, 3.73(2) would be better than 3.55.
For me, new heads are out of budget, so, I'm porting the ones that I have, lots of write ups.
For any build/mods, you need a realistic budget, and stick with it.
Former Vendor
Joined: Apr 2019
Posts: 279
Likes: 3
From: Shawnee KS
This is such an odd stance. You're basically saying you'd rather run an inferior EFI system because you have some internal force that requires you to run a sticker on your vehicle or a word in your signature (instead of just throwing away the stick and saying SPE ECU or Stinger ECU or Stinger Performance ECU or something). Regardless, if you can't afford it anyway (since it's outside of your budget) it's weird to say the name is what's holding you back. For the record, it stands for (P)lug (i)n (M)egasquirt (P)rocessor.
Logistics Pro
Joined: Aug 2014
Posts: 3,572
Likes: 855
This is such an odd stance. You're basically saying
It's my opinion, its what works for me, and I like to keep my budget low, but not too low that sacrifices my needs.
I'm just putting out suggestions that my help others with their goals.
For the record, it stands for (P)lug (i)n (M)egasquirt (P)rocessor.
Hmm, pimpx is just megasquirt?, neither are in my budget.
Tuning, programming, changing software takes time, I have time, that is in the budget.
run an inferior EFI system
Former Vendor
Joined: Apr 2019
Posts: 279
Likes: 3
From: Shawnee KS
Hey, I'm just a regular user, I'm not your customer, and your not my supplier.
It's my opinion, its what works for me, and I like to keep my budget low, but not too low that sacrifices my needs.
I'm just putting out suggestions that my help others with their goals.
Ah, repackaged and rebranded Megasquirt hardware.
Hmm, pimpx is just megasquirt?, neither are in my budget.
Tuning, programming, changing software takes time, I have time, that is in the budget.
Very subjective. Could you start a new thread on why that is?
It's my opinion, its what works for me, and I like to keep my budget low, but not too low that sacrifices my needs.
I'm just putting out suggestions that my help others with their goals.
Ah, repackaged and rebranded Megasquirt hardware.
Hmm, pimpx is just megasquirt?, neither are in my budget.
Tuning, programming, changing software takes time, I have time, that is in the budget.
Very subjective. Could you start a new thread on why that is?
Yes, it's Megasquirt based. This is no secret, we state this specifically on our site. It is not however simply rebranded and repackaged. The processor and firmware is MS, the boards inside are all ours and NOTHING inside of the ECU is part of any Megasquirt kit that is available to "build your self" anywhere. So it's still our unique product with it's own electronics internally.
There is already a thread so I'm not going to make another. There is also our site which explains all of this in great detail. As you stated though, you're not a customer (prospective or otherwise) and you can have your opinion that you don't like the name so much you'd never use it and I'll have my opinion that it's an odd stance.
Thread Starter
|
Junior User
Joined: Oct 2019
Posts: 96
Likes: 0
I would keep it cheap and simple, stick to your goals and the basics.
You want more power, great, keep it realistic to your budget.
What is your budget?
I have similar motor, 1994 351w, SD. First I bought quarter horse for tuning, that is in the budget $250.
Pimpx, not my style, specially when I advertise what I run, don't want 'PIMP' anything on my truck, then there's the cost, outside of budget.
Good intake, heads, cam, exhaust headers, will get you closer to your goal.
To really feel the mods, you will have to change your gears. Being an overdrive trans, depends on hwy driving. 4.10s would be great, 3.73(2) would be better than 3.55.
For me, new heads are out of budget, so, I'm porting the ones that I have, lots of write ups.
For any build/mods, you need a realistic budget, and stick with it.
You want more power, great, keep it realistic to your budget.
What is your budget?
I have similar motor, 1994 351w, SD. First I bought quarter horse for tuning, that is in the budget $250.
Pimpx, not my style, specially when I advertise what I run, don't want 'PIMP' anything on my truck, then there's the cost, outside of budget.
Good intake, heads, cam, exhaust headers, will get you closer to your goal.
To really feel the mods, you will have to change your gears. Being an overdrive trans, depends on hwy driving. 4.10s would be great, 3.73(2) would be better than 3.55.
For me, new heads are out of budget, so, I'm porting the ones that I have, lots of write ups.
For any build/mods, you need a realistic budget, and stick with it.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread Starter
|
Junior User
Joined: Oct 2019
Posts: 96
Likes: 0
Hey, I'm just a regular user, I'm not your customer, and your not my supplier.
It's my opinion, its what works for me, and I like to keep my budget low, but not too low that sacrifices my needs.
I'm just putting out suggestions that my help others with their goals.
Ah, repackaged and rebranded Megasquirt hardware.
Hmm, pimpx is just megasquirt?, neither are in my budget.
Tuning, programming, changing software takes time, I have time, that is in the budget.
Very subjective. Could you start a new thread on why that is?
It's my opinion, its what works for me, and I like to keep my budget low, but not too low that sacrifices my needs.
I'm just putting out suggestions that my help others with their goals.
Ah, repackaged and rebranded Megasquirt hardware.
Hmm, pimpx is just megasquirt?, neither are in my budget.
Tuning, programming, changing software takes time, I have time, that is in the budget.
Very subjective. Could you start a new thread on why that is?
Logistics Pro
Joined: Aug 2014
Posts: 3,572
Likes: 855
was thinking of keeping the stock heads getting a different intake throttle body,headers and a good cam would like 300 hp but I really dont have the money for a pimp x system although it would be nice to have was honestly thinking of carb swaping it could put a nice holley 850 double pumper on a performer rpm intake but I dont know what all id have to do to swap it
- Edelbrock 3881Performer intake
- BBK 56 mm throttle body (expensive, but the only choice for bolt on)
- Headers, shorties or long tube (some do not have EGR connection, easily added)
- there are many cam choices, call your cam company, they will guide
Stock EFI would be fine. Next upgrades would be to swap or port heads, those will be restricting you the most.
If you get an aggressive cam(not recommended for daily driver), you will need to tune, options are:
- QuarterHorse
- MegaSquirt
- Holley HP or Dominator
- Edelbrock Pro-Flo 4
- Pimpx
For the DIY tuner, it is pretty amazing the little gains you will get, with tuning the EFI. Can be quite the learning curve.
Thread Starter
|
Junior User
Joined: Oct 2019
Posts: 96
Likes: 0
Your choices are:
- Edelbrock 3881Performer intake
- BBK 56 mm throttle body (expensive, but the only choice for bolt on)
- Headers, shorties or long tube (some do not have EGR connection, easily added)
- there are many cam choices, call your cam company, they will guide
Stock EFI would be fine. Next upgrades would be to swap or port heads, those will be restricting you the most.
If you get an aggressive cam(not recommended for daily driver), you will need to tune, options are:
- QuarterHorse
- MegaSquirt
- Holley HP or Dominator
- Edelbrock Pro-Flo 4
- Pimpx
For the DIY tuner, it is pretty amazing the little gains you will get, with tuning the EFI. Can be quite the learning curve.
- Edelbrock 3881Performer intake
- BBK 56 mm throttle body (expensive, but the only choice for bolt on)
- Headers, shorties or long tube (some do not have EGR connection, easily added)
- there are many cam choices, call your cam company, they will guide
Stock EFI would be fine. Next upgrades would be to swap or port heads, those will be restricting you the most.
If you get an aggressive cam(not recommended for daily driver), you will need to tune, options are:
- QuarterHorse
- MegaSquirt
- Holley HP or Dominator
- Edelbrock Pro-Flo 4
- Pimpx
For the DIY tuner, it is pretty amazing the little gains you will get, with tuning the EFI. Can be quite the learning curve.
Logistics Pro
Joined: Aug 2014
Posts: 3,572
Likes: 855
The e303 performance cam is Mass Air EFI only!
More than likely due to the 110° lobe separation, which is NOT recommended for stock SD applications.
There are other SD cams that will will work, but will have 114 lobe separation guaranteed to work.
Going down to 112, you probably will have to have a tuner to make it happy.
If you keep your SpeedDensity, you need a computer friendly cam.
Many have success with the xe258hr on SpeedDensity.
More than likely due to the 110° lobe separation, which is NOT recommended for stock SD applications.
There are other SD cams that will will work, but will have 114 lobe separation guaranteed to work.
Going down to 112, you probably will have to have a tuner to make it happy.
If you keep your SpeedDensity, you need a computer friendly cam.
Many have success with the xe258hr on SpeedDensity.
New User
Joined: Dec 2019
Posts: 19
Likes: 1
Need help deciding
[Conaski, didn’t want to hi jack the thread but you seem to be the man to talk to lol i have a 95 f150 supercab that im building a motor for as the original motor has 328,000 on it and burns a quart of oil a day! I was wondering if the sd system would run a 393 stroker if i upped the injectors to 24lb, did aftermarket heads and bbk throttle body along with small comp cam as theres very few sd friendly, ive had several people tell me that i could do it and it would run fine, i planned of getting a adjustable fuel reg to fine tune the mixture, what do you think?
Last edited by Ronald Kramer; Jan 15, 2020 at 09:26 PM. Reason: Mispelling
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
It's plain to me here, you'd better stick with EFI. Put an 850DP on a 351 and I can tell you you'll be sorely disappointed. The instant you nail the go pedal the first time, you'll be wondering why the engine died. You don't understand how a carburetor works.