[1baddgarage]

[QUOTE=Darrell;1995765]700-800 rwhp and you want fuel economy??? You are going to have to take a way different approach at building this engine. Buying an assembled production line shortblock isn't going to work. You are going to need a piston with a ring stack a little lower on the piston than a conventional engine. All of your piston to wall, ring end gap and other clearances are going to have to be set according to the level of boost you plan on running. You are going to have other major things to address as well such as fuel system, roll cage, transmission and rear axle. Get your check book out.[/QUOT

To make 700-800 rwhp with a 450 rwhp N/A engine will require 10-12 lbs of boost. That isn't a lot of extra pressure in the cylinder. The world short blocks also allow for custom combinations. As for the rest I've built my fare share of cars from the ground up before, I know what has to happen. All I wanted was to know what everyone was getting for mpg with a 347, since this is my first complete ford build, that's all I needed to know. I'm not all that concerned with mpg, like I said, it just made a difference in my cubic inch decision. And with the foot out of the throttle the mpg of the 450 N/A and 700- 800 forced induction will be virtually identical anyways. The first stage of my build is the complete engine, and transmission. I already have a fuel system that will handle 450 rwhp. I also have a rear axle that will handle whatever I through at it also, as long as I don't do 5000 rpm clutch drops with slicks. No cage will ever touch this car, it is being built for the street, not the strip. A nice set of subframe connectors will keep it in line. As far as the forced induction that will be down the road about a year. Yes, the check book is out.

[Nice 5.0]

I thought you were suppose to launch a 5000 rpm's when you have a 5 speed and slicks. I must be doing somethng wrong.

[Sleeper_Stang_89]

[quote=1baddgarage;1997117]

Originally Posted by Darrell 700-800 rwhp and you want fuel economy??? You are going to have to take a way different approach at building this engine. Buying an assembled production line shortblock isn't going to work. You are going to need a piston with a ring stack a little lower on the piston than a conventional engine. All of your piston to wall, ring end gap and other clearances are going to have to be set according to the level of boost you plan on running. You are going to have other major things to address as well such as fuel system, roll cage, transmission and rear axle. Get your check book out.[/QUOT To make 700-800 rwhp with a 450 rwhp N/A engine will require 10-12 lbs of boost. That isn't a lot of extra pressure in the cylinder. The world short blocks also allow for custom combinations. As for the rest I've built my fare share of cars from the ground up before, I know what has to happen. All I wanted was to know what everyone was getting for mpg with a 347, since this is my first complete ford build, that's all I needed to know. I'm not all that concerned with mpg, like I said, it just made a difference in my cubic inch decision. And with the foot out of the throttle the mpg of the 450 N/A and 700- 800 forced induction will be virtually identical anyways. The first stage of my build is the complete engine, and transmission. I already have a fuel system that will handle 450 rwhp. I also have a rear axle that will handle whatever I through at it also, as long as I don't do 5000 rpm clutch drops with slicks. No cage will ever touch this car, it is being built for the street, not the strip. A nice set of subframe connectors will keep it in line. As far as the forced induction that will be down the road about a year. Yes, the check book is out.

my 331 gets 23+

[93mustank]

Originally Posted by Nice 5.0 I thought you were suppose to launch a 5000 rpm's when you have a 5 speed and slicks. I must be doing somethng wrong.

His rear can take anything he can throw at it lol....but cant take 5000 rpm dumps

[baine21225]

[quote=1baddgarage;1997117]

Originally Posted by Darrell 700-800 rwhp and you want fuel economy??? You are going to have to take a way different approach at building this engine. Buying an assembled production line shortblock isn't going to work. You are going to need a piston with a ring stack a little lower on the piston than a conventional engine. All of your piston to wall, ring end gap and other clearances are going to have to be set according to the level of boost you plan on running. You are going to have other major things to address as well such as fuel system, roll cage, transmission and rear axle. Get your check book out.[/QUOT To make 700-800 rwhp with a 450 rwhp N/A engine will require 10-12 lbs of boost. That isn't a lot of extra pressure in the cylinder. The world short blocks also allow for custom combinations. As for the rest I've built my fare share of cars from the ground up before, I know what has to happen. All I wanted was to know what everyone was getting for mpg with a 347, since this is my first complete ford build, that's all I needed to know. I'm not all that concerned with mpg, like I said, it just made a difference in my cubic inch decision. And with the foot out of the throttle the mpg of the 450 N/A and 700- 800 forced induction will be virtually identical anyways. The first stage of my build is the complete engine, and transmission. I already have a fuel system that will handle 450 rwhp. I also have a rear axle that will handle whatever I through at it also, as long as I don't do 5000 rpm clutch drops with slicks. No cage will ever touch this car, it is being built for the street, not the strip. A nice set of subframe connectors will keep it in line. As far as the forced induction that will be down the road about a year. Yes, the check book is out.

700-800 hp street car.......why?

[95StangMX]

[quote=baine21225;1997664]

Originally Posted by 1baddgarage 700-800 hp street car.......why?

Duh cause no cage will ever touch his car..........guess he plans on trying to run a hussle

[baine21225]

i guess?

[The Novice]

[quote=baine21225;1997664]

Originally Posted by 1baddgarage 700-800 hp street car.......why?

+1 a car with 450 HP that can actually get it to the ground and tires i think would be a better bet.

On the street you'll be spinning threw the gears like hell. Why dont ya just try to start out like you said, "in stages". i think you'll find a 500HP+ Street car is plenty.

Save the money and buy good sets of tires so you can actually hook the street car. The Roads here in michigan suck, i dont live too far from ya. I wouldnt say its worth it. The difference in HP to the lack of traction for the street i would suggest trying in stages and seeing how well the 500 HP works, i think you'd be happy and eat less tire. But remember this is just a suggestion.

[Stangzilla]

I am still wondering how he is gonna get 450hp 2 the wheels on a 9.5:1 compression 371ci motor? thats like what 520hp or so 2 the flywheel on that low of compression with that little of cid with that cam? hmmmm

[baine21225]

Originally Posted by Stangzilla I am still wondering how he is gonna get 450hp 2 the wheels on a 9.5:1 compression 371ci motor? thats like what 520hp or so 2 the flywheel on that low of compression with that little of cid with that cam? hmmmm

3/4 cam, duh......wheres w/t when you need him

[Stangzilla]

Originally Posted by baine21225 3/4 cam, duh......wheres w/t when you need him

LOL, hahahahah, I remember that 1!! That wuz fuckin funny!!

[1slo5.0]

Originally Posted by 1baddgarage To make 700-800 rwhp with a 450 rwhp N/A engine will require 10-12 lbs of boost. That isn't a lot of extra pressure in the cylinder. The world short blocks also allow for custom combinations. As for the rest I've built my fare share of cars from the ground up before, I know what has to happen. All I wanted was to know what everyone was getting for mpg with a 347, since this is my first complete ford build, that's all I needed to know. I'm not all that concerned with mpg, like I said, it just made a difference in my cubic inch decision. And with the foot out of the throttle the mpg of the 450 N/A and 700- 800 forced induction will be virtually identical anyways. The first stage of my build is the complete engine, and transmission. I already have a fuel system that will handle 450 rwhp. I also have a rear axle that will handle whatever I through at it also, as long as I don't do 5000 rpm clutch drops with slicks. No cage will ever touch this car, it is being built for the street, not the strip. A nice set of subframe connectors will keep it in line. As far as the forced induction that will be down the road about a year. Yes, the check book is out.

Lol! Well, I guess you have alot of experience with 700+ rwhp blower engines so you need no advice or input from anyone here. Only 10-12lbs of boost??? Yeah, ok. Your formula is wrong. Fuel economy will not be identical between a 700-800rwhp blower motor and a 450rwhp n/a engine regardless of whether or not you keep your foot out of it. My 560rwhp blower motor car had noticebly better fuel economy after I took the blower off. Foot in it or not, you are still turning that blower over, not to mention the bigger injectors, etc. If your rear axle can't handle 5000rpm launches I don't see how its going to handle anything you throw at it. I'm guessing its not going to handle power shifting either. These are all things that have to be looked at. Rollcages don't make race cars. Having a rollcage doesn't make the car unstreetable at all. With 700-800rwhp and no rollcage the car will be a pretzel if it gets any traction. Rollcages are for safety and for chassis stability (which will actually make the car faster).... Anyway, I'll keep my inexperienced ass out of your thread now. Have fun with the build and good luck!

[1slo5.0]

Originally Posted by Nice 5.0 I thought you were suppose to launch a 5000 rpm's when you have a 5 speed and slicks. I must be doing somethng wrong.

Yep, you are doing it wrong.

Originally Posted by 93mustank His rear can take anything he can throw at it lol....but cant take 5000 rpm dumps

Originally Posted by baine21225 700-800 hp street car.......why?

Because its a pipe dream, obviously.

Originally Posted by Stangzilla I am still wondering how he is gonna get 450hp 2 the wheels on a 9.5:1 compression 371ci motor? thats like what 520hp or so 2 the flywheel on that low of compression with that little of cid with that cam? hmmmm

Its possible. I have a couple of friends with pump gas 347s that made 540-560hp on a DTS dyno. It will take a good combination though, not slapped together parts.

[Stangzilla]

Originally Posted by Darrell Yep, you are doing it wrong. Because its a pipe dream, obviously. Its possible. I have a couple of friends with pump gas 347s that made 540-560hp on a DTS dyno. It will take a good combination though, not slapped together parts.

No I believe and know it is possible but not with what he is using..

[Stangzilla]

Thats funny I just noticed that he said that a nice pair of sf connectors will keep it in line.. SF connectors r as close as usless as it get with a car thats making any power. At the very least he would have to use an Evolution Motorsports X-brace but even that is not enough 4 a car with that much power.. Just let him go Darrell he knows what he is doing... WTF do u know anyway?!! U have only been in the 9's!!! Like Baine said if he uses a 3\4 cam he can make that power on 10-12lbs of boost... Maybe he is gonna use an Apache attack helicopter turbine as his blower, u dont know?

[BEASTstang]

Originally Posted by Darrell Yep, you are doing it wrong. Because its a pipe dream, obviously. Its possible. I have a couple of friends with pump gas 347s that made 540-560hp on a DTS dyno. It will take a good combination though, not slapped together parts.

Do you mind me asking what are the h/c/i they are using to get those numbers darrell? I'm just trying to get the right combo for my 347.....Thanks again darrell

[1slo5.0]

Originally Posted by BEASTstang Do you mind me asking what are the h/c/i they are using to get those numbers darrell? I'm just trying to get the right combo for my 347.....Thanks again darrell

One is using Canfields and the other one is using AFR205s. Strangely enough, the AFR heads are on the lower horsepower engine....

Twisted Wedge CNC185 heads would be a good choice too.

[95StangMX]

I have the twisted wedge cnc 205's giong on mine. need to get back to the car. I cant wait to see how it turns out. Woody and Jay seem to think I should be able to get around 450 to the wheels....what do you think Darrell?

[The Novice]

Originally Posted by 95StangMX I have the twisted wedge cnc 205's giong on mine. need to get back to the car. I cant wait to see how it turns out. Woody and Jay seem to think I should be able to get around 450 to the wheels....what do you think Darrell?

Nice man, havent really heard any updates on your car in a while now, hows it all going? Any pics

btw you using an aftermarket tranny?

[Sleeper_Stang_89]

Originally Posted by 95StangMX I have the twisted wedge cnc 205's giong on mine. need to get back to the car. I cant wait to see how it turns out. Woody and Jay seem to think I should be able to get around 450 to the wheels....what do you think Darrell?

Your combo is like the big sister of mine...