Hi Guys,
As you may remember, I am in the process of putting together an M20 Stroker for my E30 Track Car, My Car is RHD, I have a reasonable stainless manifold on there currently, but I want to get something nicer made for the new engine (Current manifold has some ‘dinks’ in it to allow it to clear the column)
I was going to make something myself, I am capable, but do not have time currently due to work, I have a local place lined up to make a nice manifold for me, they make some lovely parts, however looking for some advice please.
I’m thinking 1.5” Primaries into either a 2.25 or 2.5” Collectors.. however I’m unsure on primary lengths, (and secondary lengths).
Does anyone have any information on the lengths on manifolds that are out there? Or what works well for an M20 Stroker.
Am I right in saying the ‘supersprint’ manifolds are pretty much the most highly regarded in the market currently ? Does anyone know what lengths we get here?
My Engine specs can be seen below for reference.
• M20B25 Block (85mm bore)
• M52 Crank
• M52 EU Rods
• 885 Head, 3 angle Valve Seats.
• Shrick 288 Cam & Vernier Pulley
• Shot Peened HD Rockers
• IE Pistons 11:1 Compression
• RHD ITB’s
I understand we can get some theoretical figures for a manifold using the calculations supplied by Bell in ‘4 stroke performance tuning’ but also appreciate there is often no substitute for experience.
Interested to hear your thoughts and ideas guys.
Could also look at the option of getting multiple made up if there was any interest…
Many thanks
As you may remember, I am in the process of putting together an M20 Stroker for my E30 Track Car, My Car is RHD, I have a reasonable stainless manifold on there currently, but I want to get something nicer made for the new engine (Current manifold has some ‘dinks’ in it to allow it to clear the column)
I was going to make something myself, I am capable, but do not have time currently due to work, I have a local place lined up to make a nice manifold for me, they make some lovely parts, however looking for some advice please.
I’m thinking 1.5” Primaries into either a 2.25 or 2.5” Collectors.. however I’m unsure on primary lengths, (and secondary lengths).
Does anyone have any information on the lengths on manifolds that are out there? Or what works well for an M20 Stroker.
Am I right in saying the ‘supersprint’ manifolds are pretty much the most highly regarded in the market currently ? Does anyone know what lengths we get here?
My Engine specs can be seen below for reference.
• M20B25 Block (85mm bore)
• M52 Crank
• M52 EU Rods
• 885 Head, 3 angle Valve Seats.
• Shrick 288 Cam & Vernier Pulley
• Shot Peened HD Rockers
• IE Pistons 11:1 Compression
• RHD ITB’s
I understand we can get some theoretical figures for a manifold using the calculations supplied by Bell in ‘4 stroke performance tuning’ but also appreciate there is often no substitute for experience.
Interested to hear your thoughts and ideas guys.
Could also look at the option of getting multiple made up if there was any interest…
Many thanks
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