531 headjob...

Thumperslaw · Mar 17th, 2019, 18:18

Friend of mine has a 531 head for I think a good price. Now.. thinking of getting it for for b230fk engine. I’ve read that it’s a better flowing head then the standard 530. Port ‘n polish with better cam is the plan. Waste of money or would it be worth slapping in some big valves? Would you have to deck the pistons or would it be swap with easy?

T5Sweep · Mar 17th, 2019, 19:10

What are your goals? Are you wanting 200whp or 1000whp? More details required.

Thumperslaw · Mar 17th, 2019, 19:11

Quote:

Originally Posted by T5Sweep

What are your goals? Are you wanting 200whp or 1000whp? More details required.

Over 300 whp for sure

barkster1971 · Mar 17th, 2019, 19:21

Put the next size up valves installed as you can use the same valve seats that are in. Get a decent cam in . Bigger throttle body off a 960. Decent turbo and you'll be alright.

Thumperslaw · Mar 17th, 2019, 19:27

Quote:

Originally Posted by barkster1971

Put the next size up valves installed as you can use the same valve seats that are in. Get a decent cam in . Bigger throttle body off a 960. Decent turbo and you'll be alright.

Does the 960 throttle body bolt on to intake of would you take the intake from 960

Laird Scooby · Mar 17th, 2019, 20:42

Quote:

Originally Posted by Thumperslaw

Does the 960 throttle body bolt on to intake of would you take the intake from 960

Given the 960 is a straight-6 3.0 i would suggest the throttle body bolts onto the B230 inlet manifold.

Not sure if you'll need anything else though.

Interesting idea though, i wonder if i can release a few gee-gees on my 760 (B280E V6) with a larger throttle body..................

mocambique-amazone · Mar 17th, 2019, 21:41

You will need more diameter at the exhaust valve. The inlet valve is OK
A different inlet manifold
The cr is worse with a 531. If you want to run high boost it will be fine.
Bigger turbo
3"exhaust
Cam
Difficult with LH2.4
Intercooler
Piping
Flywheel
Clutch
Gearbox

You have enough pounds to spent hopefully
300whp is high level and hard to hit.
The butterfly is the last important step

Good luck, Kay

Dirty Rooster · Mar 17th, 2019, 22:26

Quote:

Originally Posted by Thumperslaw

Friend of mine has a 531 head for I think a good price. Now.. thinking of getting it for for b230fk engine. I’ve read that it’s a better flowing head then the standard 530. Port ‘n polish with better cam is the plan. Waste of money or would it be worth slapping in some big valves? Would you have to deck the pistons or would it be swap with easy?

How about dyno'ing your engine with stock head,
then swap for 531,
then bigger valves, then throttlebody,
big turbo, injectors,
water/NOX,
etc.

Post as a build thread and get us all informed. The dyno results from each stage would make for informative reading.

Go for 900bhp at the end. Goldbrick!!

classicswede · Mar 17th, 2019, 22:31

Porting and polish are two words so often used wrongly together. Ports should not be polished on ever ground with a fine grit.

The combustion chamber is best polished

Mar 17th, 2019, 18:18	#1
Thumperslaw Volvo bandit Last Online: Nov 4th, 2019 20:45 Join Date: Nov 2017 Location: Oxfordshire	531 headjob... Friend of mine has a 531 head for I think a good price. Now.. thinking of getting it for for b230fk engine. I’ve read that it’s a better flowing head then the standard 530. Port ‘n polish with better cam is the plan. Waste of money or would it be worth slapping in some big valves? Would you have to deck the pistons or would it be swap with easy? __________________ 240 estate with Borbet A wheels, coilovers,front bucket seats, nardi wood wheel, turbo power now!! 1976 Harley shovelhead kicker only 1985 Harley evo

Mar 17th, 2019, 19:21	#4
barkster1971 VOC Member Last Online: Yesterday 16:56 Join Date: Jun 2009 Location: Swineshead/Salford	1 up Put the next size up valves installed as you can use the same valve seats that are in. Get a decent cam in . Bigger throttle body off a 960. Decent turbo and you'll be alright. __________________ new engine! new car!

Mar 17th, 2019, 22:31	#9
classicswede Trader Volvo in my veins Last Online: Today 08:21 Join Date: Dec 2004 Location: Anglesey	Porting and polish are two words so often used wrongly together. Ports should not be polished on ever ground with a fine grit. The combustion chamber is best polished __________________ http://www.classicswede.org www.classicswede.co.uk

Mar 17th, 2019, 19:10	#2
T5Sweep Master Member Last Online: Oct 24th, 2022 09:28 Join Date: Sep 2014 Location: Peterborough	What are your goals? Are you wanting 200whp or 1000whp? More details required.

Mar 17th, 2019, 21:41	#7
mocambique-amazone Master Member Last Online: Jan 24th, 2022 17:08 Join Date: Nov 2008 Location: small village in the north of Germany	You will need more diameter at the exhaust valve. The inlet valve is OK A different inlet manifold The cr is worse with a 531. If you want to run high boost it will be fine. Bigger turbo 3"exhaust Cam Difficult with LH2.4 Intercooler Piping Flywheel Clutch Gearbox You have enough pounds to spent hopefully 300whp is high level and hard to hit. The butterfly is the last important step Good luck, Kay

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)