Yeah let me kno. Ported upper not windstar though right? And not cut and welded? Let me know what your numbers are. Anyone have an idea of a safe but good compression ratio for 93 octane?

 

Seeing as the new 5.0 is 11:1 compression and rated to run 87 octane, I say you can probably do up to 12:1 maybe?

 

Heyy, totally new here, but I'm gonna chime in anyway. Add some lightweight pullies to that list. Nothing kills HP like a set of cast-iron wheels. I'm also gonna have to agree with the lightweight rims idea, even if its a difference of less than 100 lbs, youre going to want to shave as much curb weight as you can without starting to mess with pulling A/c and all that junk. And I'm also going to have to say stick with the aluminum drive shaft, the amount of money you'll save over carbon fiber will cover a good portion of the build. I'm totally new to Ford product and have just switched from Hyundai (shoot me) and I know Hyundai used throttle body coolant lines that seriously hurt performance. If this is a spring/summer car and you've got the coolant lines, plug them. you don't have to worry about the butterfly freezing up and it'll help intake temps.

 

I'm not having a carbon fiber driveshaft made no worries.
And I think you can go up to 12:1 but I think 11:1 might be better for a dd.

 

Ran across this thread while searching info on truetrac diffs.
Dont know much about the 3.8s.
So the Windstar intake flows better than the stock Mustang intake?

 

12:1 would seriously affect drivability. It would be prime for an N/A track car, but lean closer to 11:1 if you're using this as a daily

 

yes it flows much better. And thats why I'm thinking 11:1. It will only be driven in the spring/summer. I will have another car to drive. But make no mistake, this will be a driver, not a track car. I'm not building it around the track it anyway. I'm doing what I want to it, whether it be body, engine, rims, etc.

 

I didnt say to run that high of compression, just answering the question of "whats a safe compression for 93 octane." I would run somewhere around 10.5-11 if there are no f/i plans down the road.

 

Not if I build the n/a motor I want, no.

 

11:1 4.2 or 4.3L with the right cam, good heads/valve train, ported lower, Windstar upper and get a good free flow exhaust set up.

SSM little fox coupe ripped 11's N/A. Kirk (I forget his screen name on 3.8M/V6P...Silver2000???) has an N/A vert that was running some good times.