also carbed vs the efi he's after


merely saying that the 393 and afr 185 heads are more than capable to make crazy hp and tq if he uses the right intake(s) and injectors to support it...even if he chokes it with a truck intake and 4X4 cam. Who knows?

 

https://www.ford-trucks.com/forums/s...d.php?t=206523

Look at your post (#7) from this thread....says 22 lbers would support 400hp (using a BSFC of .45).

I'm going to do a dyno run on the Destop dyno and I'll report back my results.

 

I am not sure where I got the original information from, I actually cracked a book and read something for the last post.

I also compared my latest information with the holley site and another and it is more accurate.

Here is a link to an easy calculator....sorry for the confusion....suprised capone didn't catch that, he's usually pretty sharp about those things.

http://injector.com/injectorselection.php



If you have time do a dyno run using the afr 165 heads, the 302 shortblock and the HO camshaft vs comp cams 35-514-8

 

hope you weren't offened by the "are you considered and employee of FTE" comment. It was a real question, I am not clear on how the whole moderator thing works, didn't know if you were compensated for your time. And when you posted "We" it made me wonder even more. later

 

I read in another book that the 24lbers will only support 307 hp as well....it all depends on what BSFC rate you use.

I have my dyno information at home, I forgot to post it last night. I'll get more specific when I get the numbers but that 393w with AFR185s, 9.5:1 compression, edlebrock intake, E-cam (just used that for an idea), put out around 480hp. The 351 with the same parts put out like 450hp, had a more flat torque curve between 2000 and 5000, and had better volumeric efficiency. The torque difference at 2000 rpm, was like 20 ft-lbs (around 411 vs 430 I believe).

I didn't think this engine would produce that much power (I know it's not 100% accurate but it's in the ballpark) so I asked ryan to do the regular GT-40 heads to see what kind of power numbers it makes. I don't really want a gas guzzling 480hp and I thought my 24lb injectors were good for 400hp. I don't even know how or have upgraded fuel pumps yet. I've tried to find out but everytime I find someone whos got a high hp F-series doesn't have good fuel pump info. I am also surprised at how little of a difference the 393 vs the 351 made....

*wasn't offended at all, didn't mean to come off in a bad way but I was in a rush, sorry I am a volunteer.

 

It would be a good idea to install new pumps anyways, I'd say the truck has some miles on it.

 

I agree, but I havn't found any high volume pumps that fit.

 

any mustang inline pump will work. also upping to 30lb injectors would probably take care of you.

 

Well, I figured I'd make something work with a mustang pump...so I wasn't that worried about it, but it was something I was going to do after I got the motor running and driving. My stockers will support the power for me to drive it

If I can be in the 12-13ish for MPG in the city when babying it...I'll be happy...but I don't think 480hp will do that...agree/disagree?

 

you might be very supprised. i think because you will use less pedal when driving around town it could get that. that guy with the built 408 i think was getting around 10mpg most the time. how are your gears in your truck? that to may make a difference

 

I have 4.10s and 35" tires....480hp is a lot for a daily driven truck dontcha think?

 

Yep its gonna be so kewl. i think with those tires and gear combo you will see that kinda of mpg . my friend had a hot 88gt pushing 350hp with a vortech he got 18 city/22hwy. and thats just cruising of coarse. plus you have a manual behind it which will help even more. its the auto trannies that really suck your mpg down.

 

I'm a little leary of 480hp...thats soo much (2.3 times more than stock, probably 3+ times what it put out when I owned it).

I'm waiting on Ryan to tell me the HP figures of the other heads...I might go with some cheaper heads instead of the $1400 AFR's.

 

About the only time you'll hear the phrases high hp and decen mpg is in forced induction applications, more so with turbo chargers. Little different than a naturally aspirated combo.



As a thought mustanggt221, a decent head will run you $1000, so you'll only be saving $300 choking an engine to make less potential hp.



If I were wanting to save money and keep the hp and tq reasonable, I might consider the 302 option discussed earlier in the thread and towards the end, yeah I know I tried to sway you into the 351w but that was before I realized you were wanting to blow $5500 on the engine alone..haha. I would say look into the chp 357 option but even then your only saving $100. You could go into the jegs 302 w/t afr or edelborck heads and consider this merely freshening up the engine, then your expectations would be low but you should be impressed by the improvement in power. Then you don't have to worry about all the little things required to really take advantage of the 393 stroker or get it rolling like intake(s), exhaust modification, etc. According to anyone who has went with the stock 302 shortblock and afr combo you should be in the 300+hp and tq range at the crank and thats a whole lot better than an oem 351w, the cam you select will play a huge role in this.

Thats why I think it would be worth your while to see how the 302/afr/smaller roller XE cam grind would do on the desktop dyno, as a reference. If planned right you could save a couple thousand vs saving a couple hundred and choke the big ci stroker..who knows?

I'm with kemicalburns the big stroker 400+hp and tq combo would be nice.



Disclaimer...this post is not intended to agree or disagree with any one individual, just stating the obvious which has already been considered by mustanggt221.

 

The 302 is out of the equation, i still need torque below 2k rpm. It's gonna be a 351 if not the 393. I'm waiting on the results from Ryan and we'll see what those #'s are...400-425hp would probably be the max, but the torque is the most important.