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I have decided to change my setup (see gallery) and run an intercooler. But now i have the delema of going back to the log or keeping the bbm? they will both have about the same amount of work involved wether i change it back or not;
Change it back to log PRO easyier to run the piping CON lot of work to convert back Keep the BBM PRO dont have to change manifold CON Have to re-route and move alot of stuff,and harder to route intercooler pipes What would you guys do? is the bbm or log better for a turbo setup? if its log than why isn't more EF / EL guys going back?
_________________ FALCAHOLIC |
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| fritzz |
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the bbm manifold does a better job of evening out air flow to all cylinders, the older log style tends to fun a bit leaner on the back cylinders when used with boost. the bbm may have slightly better bottom end to
_________________ # 1997 EL Falcon GLI - 600+rwkw |
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| badcooky |
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There it is.
Maybe go back to the BBM and matchport some stuff?
_________________ BA XL ute. |
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| xfpaul |
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fritzz wrote: the bbm manifold does a better job of evening out air flow to all cylinders, the older log style tends to fun a bit leaner on the back cylinders when used with boost. the bbm may have slightly better bottom end to
wrong! gravity and foward movement actualy can make the rear cyl run rich , dont take my word for it check out the mod the performance guys are doning to the bbm , remove the top and replace with a single plenum
_________________ NC2 Fairlane AU2 Intech 4.0 Wolf V500 ECU Accel 500cc Injectors Eaton M90 Blower MPx Porting 75mm Mustang TB Intercooler Holley 255lph EL XR6 Rear End 3.45 LSD Duel Fuel lots more. |
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ok, so what do we think is the better manifold?
_________________ FALCAHOLIC |
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| fritzz |
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xfpaul wrote: fritzz wrote: the bbm manifold does a better job of evening out air flow to all cylinders, the older log style tends to fun a bit leaner on the back cylinders when used with boost. the bbm may have slightly better bottom end to wrong! gravity and foward movement actualy can make the rear cyl run rich , dont take my word for it check out the mod the performance guys are doning to the bbm , remove the top and replace with a single plenum dude i have tested it myself. the stock log manifolds always run leaner on 6 than the rest with boost. yes a properly designed plenum is better, i have 1 on my car if u haven't noticed! but he is asking which stock manifold is better.
_________________ # 1997 EL Falcon GLI - 600+rwkw |
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| EBXR8380 |
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Generally if a cylinder runs leaner.. Its due to having MORE boost or pressure on that port...
Which makes it strange to have the rear cylinder lean out with older inlet. Btw its not a log manifold if it has individual runers.. It could be there's issues with fuel pulsing in fuel rail ? Or fuel pump , injectors are keeping up with power demand.. In any case if this was an issue ? A good ECU can tune around this.. On the EMS 8860 and E11V2 Haltech ECU's we have had no issues with both inlets up 280 rwkw and 370 on C16 up to 20Lb boost on E.B manifold..
_________________ As in ZOOM 126 edition |
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