stock efi upper and lower - help me!

fantozi · 08-07-2001, 01:02 AM

How many HP is a stock upper and lower good for ??? Is this better than a weiand stealth intake and a 650 carb??

Capri306 · 08-07-2001, 11:06 AM

Well, it's not that simple. You're comparing an EFI intake to a carb setup. AFAIK, the stock intake is good for a doorstop compared to what's in the aftermarket. A Cobra intake is supposedly good up to 400 horse (n/a of course), just for comparison, so I'd draw the line on the stocker at a little less than 300 or so. I'm sure there's exceptions (there are to EVERY rule), but usually the stock intake, heads, and exhaust are the first things to go on a 5.0L Mustang. They're adequate pieces in stock form, but that's not what the majority of us want.

As for a Stealth, I've heard good things so far. Here's the question that should determine if you want to convert to carb: will you drive this car every day, and/or in a lot of different traffic situations, and/or year 'round? If yes to any of those, stick with the EFI, if for nothing else than driveability. Carb guys don't attack me on this, but we all know that EFI is more suited to daily driving and changing atmospheric conditions than carbs are. In addition, until you upgrade your cam, heads, and exhaust, it won't yield any more power with a carb. In fact, you may lose power with that large of a carb on a stock 5.0L. My suggestion is to stick with the EFI.

------------------
Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch

fantozi · 08-07-2001, 03:40 PM

Actually I have just bought a ford crate motor from ford. I got the 340 hp with x heads and e cam. I cannot decide which is better for me tho. EFI or CARB. I have a complete stock set up for the efi but would have to buy the carb stuff. My mustang is a 83 which is carb but I sorta want to convert over to EFI. I only drive this on the weekends (maybe 3000 miles a year).

08-07-2001, 01:02 AM	#1
fantozi Registered Member Join Date: Aug 2001 Location: Albuq, NM Posts: 21	stock efi upper and lower - help me! How many HP is a stock upper and lower good for ??? Is this better than a weiand stealth intake and a 650 carb??

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How much HP on ported E7's and stock ported upper	89FHPLX	Windsor Power	5	02-08-2002 07:29 PM
Explorer upper....but what lower to use???	84LX89GT	Windsor Power	2	08-13-2001 05:30 AM
REAR UPPER AND LOWER CONTROL ARMS	bcinyuz	Windsor Power	1	05-08-2001 04:17 AM
Edelbrock Upper W/ Truck Lower??	IMPULSERACING	Windsor Power	2	04-16-2001 02:05 PM

08-07-2001, 11:06 AM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Well, it's not that simple. You're comparing an EFI intake to a carb setup. AFAIK, the stock intake is good for a doorstop compared to what's in the aftermarket. A Cobra intake is supposedly good up to 400 horse (n/a of course), just for comparison, so I'd draw the line on the stocker at a little less than 300 or so. I'm sure there's exceptions (there are to EVERY rule), but usually the stock intake, heads, and exhaust are the first things to go on a 5.0L Mustang. They're adequate pieces in stock form, but that's not what the majority of us want. As for a Stealth, I've heard good things so far. Here's the question that should determine if you want to convert to carb: will you drive this car every day, and/or in a lot of different traffic situations, and/or year 'round? If yes to any of those, stick with the EFI, if for nothing else than driveability. Carb guys don't attack me on this, but we all know that EFI is more suited to daily driving and changing atmospheric conditions than carbs are. In addition, until you upgrade your cam, heads, and exhaust, it won't yield any more power with a carb. In fact, you may lose power with that large of a carb on a stock 5.0L. My suggestion is to stick with the EFI. ------------------ Capri306, Moderator, The Mustang Works Online 1979 Mercury Capri, 5.0L -- C4 -- 2.73 1987 Mustang LX Notch

08-07-2001, 03:40 PM	#3
fantozi Registered Member Join Date: Aug 2001 Location: Albuq, NM Posts: 21	Actually I have just bought a ford crate motor from ford. I got the 340 hp with x heads and e cam. I cannot decide which is better for me tho. EFI or CARB. I have a complete stock set up for the efi but would have to buy the carb stuff. My mustang is a 83 which is carb but I sorta want to convert over to EFI. I only drive this on the weekends (maybe 3000 miles a year).