Engine Builders talk.
08-23-2014, 03:14 PM
#2911
Senior Member
I've never been so wishy washy about how to build a Mod motor. Trucks are a strange new world for me. My SCREW's a little bitch towing a 28 footer and I'm trying to find the happiest spot for Towing ability and my own sanity. The 4v is a wash since I won't get anymore Tq than I have now without raising the powerband. (I'm saving that for the Cobra next year.) If I would have known my wife wanted to start RV camping and Boating I would have bought a new Diesel but this is where I'm at now. I think I'm going with 9.6-10.1 compression, mild head work, 24# injectors to have more tuning in the top range, MPH Torquer cams and OBX shorties. I may end up caving on the blower next year if I can't get the feel of towing performance I want. I've only towed the 28 footer once this year and it's my only experience towing with a little truck. I really wish there were more "quality" diesel conversions out there to mimic. ..just ranting in your thread.
Wayne
08-23-2014, 03:18 PM
#2912
Well I was looking for a lightning but theres a sweet 2002 mustang GT roller that crossed my path. Went ahead and bought it. Shes getting the 5.4 4V. So I regret I must sell my blower...if anyone knows anyone. No I will not put it in the mustang and be "that" guy lol
Last edited by Wolvee; 08-23-2014 at 03:20 PM.
08-23-2014, 03:19 PM
#2913
08-23-2014, 03:21 PM
#2914
Senior Member
Thread Starter
08-23-2014, 03:41 PM
#2915
08-23-2014, 04:44 PM
#2916
Senior Member
It's more than a tune! You need to factor in IAT temps, boost, timing, octane, compression, etc. That's high compression to then throw a blower on. I'd be willing to beat that 93 octane wouldn't support much boost at all, then you factory in heat from the HEATon blower IATs go up, timing starts being pulled and you lose power. E85 is the only way I would build that set up. IATs are hard to keep lower in stock pulley trucks without towing in the summer. I been around the block a bunch with L blower swaps on big heavy trucks that tow!
Wayne
Wayne
08-23-2014, 05:30 PM
#2918
You're preaching to the choir a bit. I've been building and boosting Mod motors for a decade and I know what works. I have even tunned and ran corn in a 10 second V6 and in my personal 2v. I get what you're saying about the compression, it's not optimal. I've been down the road of E85 too many times to know it's just not worth it anymore for DD's or race cars. Nothing's set in stone with my build yet since I just pulled the motor and just started ordering incidentals.
Keeping the Tq high down low is where I'm finding it nearly impossible to do NA with anything more than stock. Comparing the numbers it seems Ford really did design these for their fleet vehicles.
Keeping the Tq high down low is where I'm finding it nearly impossible to do NA with anything more than stock. Comparing the numbers it seems Ford really did design these for their fleet vehicles.
08-23-2014, 06:22 PM
#2919
Senior Member
You're preaching to the choir a bit. I've been building and boosting Mod motors for a decade and I know what works. I have even tunned and ran corn in a 10 second V6 and in my personal 2v. I get what you're saying about the compression, it's not optimal. I've been down the road of E85 too many times to know it's just not worth it anymore for DD's or race cars. Nothing's set in stone with my build yet since I just pulled the motor and just started ordering incidentals. Keeping the Tq high down low is where I'm finding it nearly impossible to do NA with anything more than stock. Comparing the numbers it seems Ford really did design these for their fleet vehicles.
08-23-2014, 06:56 PM
#2920
NA with 4.10's and 33's. Would that be a good starting point pulling a 4500 lbs trailer?