Carburated HP?
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Carburated HP?
Is anyone making big HP with just carb, intake and exhaust? The reason I ask is that my rules are No Fuel injection, turbos, Nitrous. My S2000 motor resides in a stock car. NASCAR type car. 2200 lbs total weight when we roll on the track.
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From: Tampa
WTF? I don't think anyone is going to remove the electronic fuel injection on their S2000 to replace it with a carb. Besides there are different fuel maps for on and off VTEC. You can't tune a carb for that.
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From: Clatskanie, OR
Originally Posted by Requiem,Apr 4 2010, 10:31 PM
WTF? I don't think anyone is going to remove the electronic fuel injection on their S2000 to replace it with a carb. Besides there are different fuel maps for on and off VTEC. You can't tune a carb for that.
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From: Worcester, MA
You won't find much info on installing a carb on a previously EFI engine around here. You may be better off over on VWvortex in the carb and ITB forum or on LS1tech.com. Lots of guys install carbs on those motors and you never know if they'd have some helpful info.
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From: Scotland
Yeah it will be very difficult to do that... plus kind of pointless... can you not get some cams that keep the engine in constant 'Vtec mode' which you could tune for then? Or would the airflow differ so much that it would be complex to tune the carb?
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From: Pawtucket, RI
Shouldn't be that big a deal, IMO, to throw a pair of 50mm DCOE webers or PHH Mikunis on there and get it reasonably tuned for the range of interest.
Wouldn't worry too much about VTEC vs. non-VTEC "maps" for it. Good thing about carbs is: the more air you draw in, the more fuel you get. You can play with the sizes of the main fuel and air jets to keep it in the desired A/F range for the desired rpm range.
In my limited experience (3x2bbl 45mm on my 240Z), carbs ain't that bad, really, particularly if it's for a track car and you don't care too much about idle quality and cruise mpg. Ultimately you can get more power with fuel injection because carbs require a venturi (which will be at least a smidge restrictive) to get the pressure drop required to draw fuel in. Not necessarily that huge of a loss.
Wouldn't worry too much about VTEC vs. non-VTEC "maps" for it. Good thing about carbs is: the more air you draw in, the more fuel you get. You can play with the sizes of the main fuel and air jets to keep it in the desired A/F range for the desired rpm range.
In my limited experience (3x2bbl 45mm on my 240Z), carbs ain't that bad, really, particularly if it's for a track car and you don't care too much about idle quality and cruise mpg. Ultimately you can get more power with fuel injection because carbs require a venturi (which will be at least a smidge restrictive) to get the pressure drop required to draw fuel in. Not necessarily that huge of a loss.
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From: SF Bay Area and Sactown
Originally Posted by ZDan,Apr 5 2010, 02:48 PM
Shouldn't be that big a deal, IMO, to throw a pair of 50mm DCOE webers or PHH Mikunis on there and get it reasonably tuned for the range of interest.
Wouldn't worry too much about VTEC vs. non-VTEC "maps" for it. Good thing about carbs is: the more air you draw in, the more fuel you get. You can play with the sizes of the main fuel and air jets to keep it in the desired A/F range for the desired rpm range.
In my limited experience (3x2bbl 45mm on my 240Z), carbs ain't that bad, really, particularly if it's for a track car and you don't care too much about idle quality and cruise mpg. Ultimately you can get more power with fuel injection because carbs require a venturi (which will be at least a smidge restrictive) to get the pressure drop required to draw fuel in. Not necessarily that huge of a loss.
Wouldn't worry too much about VTEC vs. non-VTEC "maps" for it. Good thing about carbs is: the more air you draw in, the more fuel you get. You can play with the sizes of the main fuel and air jets to keep it in the desired A/F range for the desired rpm range.
In my limited experience (3x2bbl 45mm on my 240Z), carbs ain't that bad, really, particularly if it's for a track car and you don't care too much about idle quality and cruise mpg. Ultimately you can get more power with fuel injection because carbs require a venturi (which will be at least a smidge restrictive) to get the pressure drop required to draw fuel in. Not necessarily that huge of a loss.
What kind of carb setup are you going to use? Hard to find weber/mikuni's nowadays. I think there is a hybrid brand out called SK which utilizes both weber and mikuni parts. Since its a racecar just tune it for VTEC since I'm assuming that is where your car rpm's are going to reside during the race.You will be a pioneer if you get this up and running good. Last time i heard someone switch from efi to carb was a D16Z6 back in the day running like 17:1 CR.
