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Old 08-17-2011, 11:22 AM
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blow through carb. size

Hi every body,
I'm new to this forum and all of you,I hope you welcome me as new friend and I live in Kuwait.
I have some experience in Moper's engines,can any one of you my friends answer if I have 340 stroked to 405 CID. and twin
turbo,what size of blow through carb.I can use with it? Or
what is the general formula?
thank you very much to all of you.

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Old 08-19-2011, 11:04 AM
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Quote:
Originally Posted by walsabbagh
Hi every body,
I'm new to this forum and all of you,I hope you welcome me as new friend and I live in Kuwait.
I have some experience in Moper's engines,can any one of you my friends answer if I have 340 stroked to 405 CID. and twin
turbo,what size of blow through carb.I can use with it? Or
what is the general formula?
thank you very much to all of you.
What's the Max rpm it will see. Also how much boost this will affect the volumetric efficiency of the engine.
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Old 08-19-2011, 11:39 AM
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Generally, you just want to use the same size you would use for it naturally aspirated.
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Old 08-19-2011, 04:06 PM
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Originally Posted by TurboS10
Generally, you just want to use the same size you would use for it naturally aspirated.
I have always wondered don't you want to run a bigger Carb due to the higher ve of the forced induction engine?
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Old 08-19-2011, 10:15 PM
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Originally Posted by zildjian4life218
I have always wondered don't you want to run a bigger Carb due to the higher ve of the forced induction engine?
Carbs are rated at a certain pressure differential. When the top side pressure goes up such as with turbocharging it will flow alot more air than it is rated for. The higher density air increases the signal in the boosters so they also flow more fuel as long as the needle and seats will keep it fed.
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Old 08-19-2011, 10:22 PM
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Quote:
Originally Posted by TurboS10
Carbs are rated at a certain pressure differential. When the top side pressure goes up such as with turbocharging it will flow alot more air than it is rated for. The higher density air increases the signal in the boosters so they also flow more fuel as long as the needle and seats will keep it fed.
Ah ok like most four barrels are rated at 1.5" and two barrels at 2". Sorry didn't mean to hijack just curious.
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Old 09-13-2011, 03:20 AM
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dears,

my gool is :7500 RPM,the engine ve should be 95% n/a,with small tt turbo my gool is 700HP@7000RPM.
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Old 09-13-2011, 03:22 AM
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T3/T4 small turbos
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