Recent content by sierra4000

Another idea is to insert a spacer for split intake note: lambda measurement is the basis

Thanks, so new size 1,1mm with steel rods, with cast pistons , redline 7000rpm is in safe range, Radek

Compression ratio is around 11.5 310 degree camshaft ported heads open/ optimized exhaust by computer program I saw gains (peak HP) with 100 octane fuel from a different brand I saw gains (area under the TQ curve) with just a change (reduction) in the diameter of the exhaust end and you see...

Hello, Exist some old tricks - recommendations for quick changes during fine dyno tuning to maximize power ?? (racing old style engine) for example: different fuel carb. height change (differet spacer) antireverse plate exhaust tailpipe diameter change etc etc Thanks for any tips Radek

So, is mainly mechanical problem to maintan head/piston in safe without mutual contact? Yes , this area is quite short Original dimension is 1.4mm head gasket+0.4mm piston top under block face now block is milled -0,7mm new area dimension 1,1mm

Original engine 150Hp/5700 rpm with Throttle body 55mm

Sorry What is MFG? Original is 54mm, seems undersized. Original engine had 150 hp.

Rally, MFI - KJetronic

Hi, what is Throttle body diemeter requirement for V6 engine? 2800 ccm 200hp target 7000RPM Thank You for ideas Radek

So can we say that the quality of the surface affects the flow velocity? High RPM port capacity?

Clarification if the intake runner is roughened along its entire length, can I expect any gain? Thanks Radek

Hello, How way intake runner surface affects flow numbers and power results? (two same runner volume with different surface) (rough vs smooth) Thank You Radek

I'm aware of all the mechanical reasons, but from a combustion efficiency perspective?

V6 engine bore 94, stroke 68 mm, redline 7000 rpm, original steel connecting rods, forged pistons, 100 octane fuel, we want to get some compression ratio with block milling but keep safe piston to head distance.

Hello, What is minimum (ideal) Quench dimension for flat-top pistons? Piston to head distance for racing engine. Thanks Radek