393 efi build?
Thread Starter
|
Freshman User
Joined: Dec 2012
Posts: 36
Likes: 0
393 efi build?
The straight six in my truck isn't really cutting it power wise for me and I plan to buy a complete 351 out of a 95 bronco, put in a scat 3.850 crank, stock 351 rods, 302 .30 pistons, gt40 heads, stock truck intake, and a custom grind from compcams. I am shooting for like 9.5-10-1 compression, 350+ft lbs at low rpm and be able to pass emmissions in pa. If anyone has any advice on how to achieve this let me know.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
The straight six in my truck isn't really cutting it power wise for me and I plan to buy a complete 351 out of a 95 bronco, put in a scat 3.850 crank, stock 351 rods, 302 .30 pistons, gt40 heads, stock truck intake, and a custom grind from compcams. I am shooting for like 9.5-10-1 compression, 350+ft lbs at low rpm and be able to pass emmissions in pa. If anyone has any advice on how to achieve this let me know.
Here's a dyno sim for a 5.8 with stock cam and 1.7 rockers, GT40 heads and longtubes and a 393 with the same. The 5.8 has about 9:1 compression with those heads while the 393 is a touch under 10:1..9.89 to be exact. With the stock truck intake on these motors you won't get the horsepower shown.. both combos will run into a wall at 3500-4000rpm so don't expect more than 250-260hp, but low rpm torque should be even higher.
Super Moderator
Joined: Apr 2004
Posts: 34,475
Likes: 2,800
Better check those PA smog regs. Hasn't PA adopted the CA standards? If so, you be hard pressed to pass with that set up. I didn't go all the way through their site, as it was a new vehicle purchase question.
Links are in this thread:
https://www.ford-trucks.com/forums/1...l#post13399531
Links are in this thread:
https://www.ford-trucks.com/forums/1...l#post13399531
Thread Starter
|
Freshman User
Joined: Dec 2012
Posts: 36
Likes: 0
Better check those PA smog regs. Hasn't PA adopted the CA standards? If so, you be hard pressed to pass with that set up. I didn't go all the way through their site, as it was a new vehicle purchase question.
Links are in this thread:
https://www.ford-trucks.com/forums/1...l#post13399531
Links are in this thread:
https://www.ford-trucks.com/forums/1...l#post13399531
Thread Starter
|
Freshman User
Joined: Dec 2012
Posts: 36
Likes: 0
Your aiming WAAAAY too low.. if you put that 351 in just as it is with longtube headers on it you'll exceed those torque goals and a 393 is gonna make 100ft/lbs more than that. The problem you're gonna have is making a stroker run on the stock truck EFI system, fueling requirements are gonna be higher at all rpms so you're gonna need MAF for sure and if your truck has a computer controlled auto that limits PCM choices.
Here's a dyno sim for a 5.8 with stock cam and 1.7 rockers, GT40 heads and longtubes and a 393 with the same. The 5.8 has about 9:1 compression with those heads while the 393 is a touch under 10:1..9.89 to be exact. With the stock truck intake on these motors you won't get the horsepower shown.. both combos will run into a wall at 3500-4000rpm so don't expect more than 250-260hp, but low rpm torque should be even higher.
Here's a dyno sim for a 5.8 with stock cam and 1.7 rockers, GT40 heads and longtubes and a 393 with the same. The 5.8 has about 9:1 compression with those heads while the 393 is a touch under 10:1..9.89 to be exact. With the stock truck intake on these motors you won't get the horsepower shown.. both combos will run into a wall at 3500-4000rpm so don't expect more than 250-260hp, but low rpm torque should be even higher.
I definitely plan on maf.
I am building this for a wheeler so lots of low end torque is good, but the truck is also my daily driver so I like to have a little power at the higher end, since I am a typical 16 year old kid and I like to stomp it from time to time.
Super Moderator
Joined: Apr 2004
Posts: 34,475
Likes: 2,800
Thread
Thread Starter
Forum
Replies
Last Post
Bayer-Z28
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
15
Jan 20, 2020 07:47 PM
abninf87
Performance & General Engine Building
2
Sep 21, 2009 10:17 PM
Bossman89
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
9
Nov 1, 2006 06:35 PM
Tripower455
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
26
Oct 2, 2005 04:48 PM
