Dolan BMW Turbo racing cylinder head modification, for turbocharged, supercharged, and naturally aspirated high horsepower motors
Here is some pics of a porting service I am providing. This is a beta version of what I'm providing. Pricing is underrated for the quality of work considering how much time this all takes me. I have 2 heads on my shelf. They both came off 1988 SETA motors.
They have never been machined EVER. I will be cutting the valves unless I decide to do a larger valve or if someone else wants something else done. The porting is done by someone with over 30 years engine building experience. And he isn't a shop, it's a family member of mine who is an engineer, machinist, fabricator, welder, ect He has a lot of credibility I could provide if need be.' He's a master at porting and has worked for a lot of company's that he had designed heads for quads, such as.
Yamaha and much more. My words don't so the talking the work does.
My products sell themselves with quality and consistent work.
Visually Inspect head free
25 Disassemble head
20 Clean head
50 Grind valves (12) multi angle, back cut and correct stem (if possible)
125 Jig, prep, pre-heat and weld core cracks below cam (8” max total length of repair)
30 Pressure test head
100 Remove, install and ream new bronze valve guides (extra cost for shorter guides or seals)
60 Cut valve seats (must know for race or durability – seat width critical)
20 Hand lap all valves
250 Pocket port intake and exhaust (custom shaping or cutting valve guide protrusion is extra)
140 Correct intake and/or exhaust ports (gasket match to supplied gaskets if reasonable)
150 Correct combustion chamber flaws (precision match CC volume or set CC to spec is extra cost)
40 Mill head (heavy cut is extra--- weld head surface for strength is extra --- repairs extra)
Other options ---
150 Ceramic coat exhaust ports
80 Ceramic coat valve head surfaces
200 Cut valve seats for oversized valves
100 Heat dissipating ceramic coating on exterior of head
150 Modify chambers for oversized bore (must supply head gasket sample)
65/hour Install valve springs to desired installed height/seat pressure
TBD Viton, Teflon or other special valve stem seals
65/hour Flow Bench result sheet (must provide your cam specs)
Coolant passages welded if sample headgasket is provided
Inspect and disassemble head
Grind valves multi angle, back cut and correct stem (if possible)
Jig, pre-heat and weld core cracks (8” max total length of repair)
Pressure test head
Remove, install and ream new bronze valve guides (extra cost for shorter guides or seals)
Cut valve seats (must know for race or durability – seat width critical)
Hand lap all valves
Pocket port intake and exhaust (custom shaping or cutting valve guide protrusion is extra)
Correct intake and/or exhaust ports (gasket match to supplied gaskets if reasonable)
Correct combustion chamber flaws (precision match CC volume or set CC to spec is extra cost)
Mill head (heavy cut is extra--- weld head surface for strength is extra --- repairs extra)
Other options ---
Ceramic coat exhaust ports
Ceramic coat valve head surfaces
Cut valve seats for oversized valves
Heat dissipating ceramic coating on exterior of head
Modify chambers for oversized bore (must supply head gasket sample)
Install valve springs to desired installed height/seat pressure
Viton, Teflon or other special valve stem seals
Flow Bench result sheet (must provide your cam specs)
Completely capable of doing any inline motors. The cost on multivalve motors will differ from 12V motors.
There will be updates to my service provided.
This is the beta version till I accuire enough time to finish my experimental service
To see how much interest I get. If people have more questions shoot me a pm.
Sorry for the unprofessional photos but it's what I have for now.
Only doing these for a limited amount of time. So get them while they are hot.
<a hre
Located in laguna beach CA
Here is some pics of a porting service I am providing. This is a beta version of what I'm providing. Pricing is underrated for the quality of work considering how much time this all takes me. I have 2 heads on my shelf. They both came off 1988 SETA motors.
They have never been machined EVER. I will be cutting the valves unless I decide to do a larger valve or if someone else wants something else done. The porting is done by someone with over 30 years engine building experience. And he isn't a shop, it's a family member of mine who is an engineer, machinist, fabricator, welder, ect He has a lot of credibility I could provide if need be.' He's a master at porting and has worked for a lot of company's that he had designed heads for quads, such as.
Yamaha and much more. My words don't so the talking the work does.
My products sell themselves with quality and consistent work.
Visually Inspect head free
25 Disassemble head
20 Clean head
50 Grind valves (12) multi angle, back cut and correct stem (if possible)
125 Jig, prep, pre-heat and weld core cracks below cam (8” max total length of repair)
30 Pressure test head
100 Remove, install and ream new bronze valve guides (extra cost for shorter guides or seals)
60 Cut valve seats (must know for race or durability – seat width critical)
20 Hand lap all valves
250 Pocket port intake and exhaust (custom shaping or cutting valve guide protrusion is extra)
140 Correct intake and/or exhaust ports (gasket match to supplied gaskets if reasonable)
150 Correct combustion chamber flaws (precision match CC volume or set CC to spec is extra cost)
40 Mill head (heavy cut is extra--- weld head surface for strength is extra --- repairs extra)
Other options ---
150 Ceramic coat exhaust ports
80 Ceramic coat valve head surfaces
200 Cut valve seats for oversized valves
100 Heat dissipating ceramic coating on exterior of head
150 Modify chambers for oversized bore (must supply head gasket sample)
65/hour Install valve springs to desired installed height/seat pressure
TBD Viton, Teflon or other special valve stem seals
65/hour Flow Bench result sheet (must provide your cam specs)
Coolant passages welded if sample headgasket is provided
Inspect and disassemble head
Grind valves multi angle, back cut and correct stem (if possible)
Jig, pre-heat and weld core cracks (8” max total length of repair)
Pressure test head
Remove, install and ream new bronze valve guides (extra cost for shorter guides or seals)
Cut valve seats (must know for race or durability – seat width critical)
Hand lap all valves
Pocket port intake and exhaust (custom shaping or cutting valve guide protrusion is extra)
Correct intake and/or exhaust ports (gasket match to supplied gaskets if reasonable)
Correct combustion chamber flaws (precision match CC volume or set CC to spec is extra cost)
Mill head (heavy cut is extra--- weld head surface for strength is extra --- repairs extra)
Other options ---
Ceramic coat exhaust ports
Ceramic coat valve head surfaces
Cut valve seats for oversized valves
Heat dissipating ceramic coating on exterior of head
Modify chambers for oversized bore (must supply head gasket sample)
Install valve springs to desired installed height/seat pressure
Viton, Teflon or other special valve stem seals
Flow Bench result sheet (must provide your cam specs)
Completely capable of doing any inline motors. The cost on multivalve motors will differ from 12V motors.
There will be updates to my service provided.
This is the beta version till I accuire enough time to finish my experimental service
To see how much interest I get. If people have more questions shoot me a pm.
Sorry for the unprofessional photos but it's what I have for now.
Only doing these for a limited amount of time. So get them while they are hot.
<a hre
Located in laguna beach CA
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