13 replies to this topic

[Ste mini]

What Carb is best to get best BHP from a a+ seires engine

[Bluemini]

Depends what engine size is.

[Ste mini]

998 sorry

[minidaves]

hif 38

[Ste mini]

thank you what can i expect to gain from it

[miniman5]

if its a 998, then you wana use a HIF38 thats inch and a half if its a 1275 then you want to use a HIF44 thats inch and 3 qwaters.

[Guess-Works.com]

thank you what can i expect to gain from it

better design, better echonomy, and most responsiveness to tuning....

thats compared to the hs4...

Anything else will be too big for the 998 unless highly tuned

[Sprocket]

A carb does not produce power. It can how ever reduce it, if the thing is too small, too big and or not set up correctly.

Power is produced by the engine and if the engine is consuming as much air as possible and the carb is set up right, fitting a bigger carb will do nothing.

Modifying the engine, causing it to consume more air may eventualy result in the carb choking the engine preventing it from consuming the maximum air that it possibly could and therefore limiting power

[Guess-Works.com]

A carb does not produce power

Ermmm.... it is the major component which provides the correct fuel/air mix ???

much like the human body... you breath and eat to produce power, remove either of them you die...

[Ste mini]

im agreed there its needed for the power to be produced the feul and air have to be provided in the best way possible for the engine to convert it into combustion eg power

[Sprocket]

A HIF 44 on a standard 998 will not give the engine any more power to that correctly set up HIF 38 or HS4 for that matter, just because its bigger. The engine in that state of tune is consuming the max amount of air that it can.

Has every one realy forgot that the whole reason you fit an LCB, highflow air filter, big valve gas flowed head and long duration cams, is to enable the engine to consume more air and as it does so, requires a bigger carb to ensure that it is not the restricting factor and to provide correct fuel/ air mixtures. Even then, when at this state of tune whith the correct carb, set up, fitting an even bigger carb will not produce any more power.

So explain how the carb produces power

Going back to the original question " What Carb is best to get best BHP from a a+ seires engine " It realy does not matter as long as it provides the right amount of air and fuel in the correct proportions that the engine can consume irrespective of Webber Su or injection, fuel economy however will suffer depending on what you choose to run. And considering that its a fairly standard 998 then the HIF is the carb as its the right size and farb better on fuel economy.

I'll say it again, A carb does not produce power but rather restrict it

[binge]

To be honnest, I really wouldnt want to push any more power out of my 998 without having a 5th gear!

Any more speed and the gearstick will probaby come out of its place!

[kada1980]

My 2l pinto had a standard carb running about 105 bhp and went to 130bhp after fitting twin 45 webers it now has a big valve head ported and polished with a 270 piper cam i haven't done a power run but it feels so much better. The key to unleashing power is to get the engine to breath better. A carb will play a big part in that.

[Guess-Works.com]

A HIF 44 on a standard 998 will not give the engine any more power

An where above has anyone suggested he put an HIF44 on his 998 ???

And as for what produces power, you are well aware that no one part of the entire engine makes the power, it's a combination of the all the parts...

But, as we maintain, an HIF38 is THE best carb for a 998 in std/stage 1 tune as it provides the band of tuning capabilities for that particular combination of parts... not only from a tuning point of view but also maintenance and reliability...

Why complicate matters ?