Carbed 7m?

rnoswal · 07-03-2006, 02:56 AM

FI is a compromise. Good, smooth reliable running, great cold starts and is getting better all the time, but it is not the system to use if you want power. Sure, if you can upgrade everything to much bigger or force the air in somehow it will perform well, but not great. The intake is small and is built that way for a reason, but not to race. If everyone was happy with there stuff, there would be no reason for this forum almost, except for the problem solving.

It seems like if you want all out power, or barely streetable for the N/A a carb is the best way to go and like I said 3, 2 barrell Webers are the way to go. I used to race a Toyota Celica and went from the stock carb to a 350 then 500 Holley to a dual set of Dellortos. There was no camparison. The twin carbs were more adjustable to each cylinder and never changed once set. Wide open throttle was awesome sounding. Run alcohol with it, which by the way is no problem, except using almost %50 more fuel, but cheaper, very strong!

Cams, bigger valves, a bunch more compression, good headers and collector and of course the sidedraft carbs and I bet you get well over 300 hp that pulls from idle all the way up, no waiting for turbo to spin up. Put a shot of nitrous................ I wish I had the money for all of that. No real way to pass the smog test with that setup, but I would love to drive it.

I had a 69 XKE Jag with twin 1 1/2" strombergs, good torque but.......... I found a guy that had three, 2" SU's and wanted to trade! Sure!!! The difference was like night and day. Hard to beat a variable venturi carburetor. Carbs aren't for everyone and they are getting harder and harder to get parts for, but tuning them are so much easier and more fun.......well to me anyway.

Russ

Isphius · 07-03-2006, 05:24 AM

That does sound cool... I hope to build something like that. The 7m is a good flowing motor already and it already makes 200 hp out of 3 liters, so its something good to start with. And just because carbs are basically the analog fuel control version for motors, For everyone....Think of it this way. You can get a 40$ digital watch. Its easy to use, doesnt break, any of that. Then get an analog rolex. Isnt it a lot better? lol.

07-03-2006, 05:24 AM	#2
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	That does sound cool... I hope to build something like that. The 7m is a good flowing motor already and it already makes 200 hp out of 3 liters, so its something good to start with. And just because carbs are basically the analog fuel control version for motors, For everyone....Think of it this way. You can get a 40$ digital watch. Its easy to use, doesnt break, any of that. Then get an analog rolex. Isnt it a lot better? lol. __________________ Yay the supra assistant is gone!!! WEEE!!

07-03-2006, 02:56 AM	#1
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	FI is a compromise. Good, smooth reliable running, great cold starts and is getting better all the time, but it is not the system to use if you want power. Sure, if you can upgrade everything to much bigger or force the air in somehow it will perform well, but not great. The intake is small and is built that way for a reason, but not to race. If everyone was happy with there stuff, there would be no reason for this forum almost, except for the problem solving. It seems like if you want all out power, or barely streetable for the N/A a carb is the best way to go and like I said 3, 2 barrell Webers are the way to go. I used to race a Toyota Celica and went from the stock carb to a 350 then 500 Holley to a dual set of Dellortos. There was no camparison. The twin carbs were more adjustable to each cylinder and never changed once set. Wide open throttle was awesome sounding. Run alcohol with it, which by the way is no problem, except using almost %50 more fuel, but cheaper, very strong! Cams, bigger valves, a bunch more compression, good headers and collector and of course the sidedraft carbs and I bet you get well over 300 hp that pulls from idle all the way up, no waiting for turbo to spin up. Put a shot of nitrous................ I wish I had the money for all of that. No real way to pass the smog test with that setup, but I would love to drive it. I had a 69 XKE Jag with twin 1 1/2" strombergs, good torque but.......... I found a guy that had three, 2" SU's and wanted to trade! Sure!!! The difference was like night and day. Hard to beat a variable venturi carburetor. Carbs aren't for everyone and they are getting harder and harder to get parts for, but tuning them are so much easier and more fun.......well to me anyway. Russ