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Old 10-27-2021, 07:52 PM   #1
Radtap
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Default Head porting in Az

Looking to have some work done on my head, recently acquired oteva 90 spring kit and realizing stock ain’t the way to go. Anyone know a good shop in Az I can take my head to? Likely gonna get larger valves while I’m at it too. Preferably in Tucson but I can take a trip
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Old 10-28-2021, 02:39 PM   #2
daijoubanai
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might be worth asking on the AZ Volvos facebook group. Someone local might know.
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Old 10-28-2021, 05:37 PM   #3
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Sorry I forget Facebook exists, thought someone here might know someone
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Old 11-02-2021, 08:25 AM   #4
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ship it to culberro, yeh, shiipping cost you some cash but its worth its weight in gold knowing the work will be done right. I sent him my c.h. and have nothing but good things to say about it. Recently on another build I took ch to a local shop and what a night mare. Anyways just my advice.
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Old 11-03-2021, 05:54 PM   #5
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Leaning more towards that cause he’s obviously familiar with Volvo heads, idk if I’d be able to find someone who knows volvo heads well here, couple VW guys but idk
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Old 11-03-2021, 09:16 PM   #6
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Quote:
Originally Posted by Radtap View Post
Leaning more towards that cause he’s obviously familiar with Volvo heads, idk if I’d be able to find someone who knows volvo heads well here, couple VW guys but idk
Hey there. Just so ya know, I'm booked out a ways on heads. Like months.

You can buy the tools for porting a head for ~$150 (all electric stuff), and do it yourself. Pretty easy to do. Let me know if you have any questions, or if you need pointed in a certain direction.

Porting a volvo head is easy. Rebuilding/machining one is less easy and more often screwed up.
Find a shop that knows wtf they're doing before dropping the head off.
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Old 11-03-2021, 09:22 PM   #7
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The only head I've ported was a honda gx200 heads so I can't necessarily say I know what I'm doing, I wanna open up the exhaust side of the head to get the flow a little more balanced but I don't have a flow bench to be able to test nor have I ported even remotely enough heads to know what exactly needs to be done on the 530s. I'll probably give you a shout if I haven't done it or had it done in a few months. My block still needs sleeves, rods & pistons so we're a bit of a ways out before block goes together
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Old 11-03-2021, 10:21 PM   #8
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Quote:
Originally Posted by Radtap View Post
The only head I've ported was a honda gx200 heads...
Honda GX heads suffer from similar issue as the 8v heads
Near horizontal ports, and really poor transitions into the bowl area.

From a thread a few days ago, good links on "how-to"
https://forums.turbobricks.com/showp...4&postcount=14
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Old 11-03-2021, 10:34 PM   #9
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From the somewhat limited research I’ve done so far like I said the exhaust side seems to me the main problem. Looking at my 530 head I’m telling myself I need to make the transition around the valve guide a little smoother and steeper cause I can feel that bump right after the guide aswell as make the bend near the seat a little thinner to help flow a bit more. Tell me if I’m wrong but that’s kinda what I’m getting after looking at Erland’s pictures. I’m gonna be running a set of his valve springs aswell as larger valve so I’m kinda basing it off his 531 pics
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Old 11-04-2021, 11:19 AM   #10
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Raising the roof of the exhaust port is what you don’t want to do, so be careful when working on that bump. Some heads have core shift and you’ll find the cooling passage really quick when working in that area.

You want to widen the port through the turn a bit, make the floor flatter ( “D” shaped), put as big of radius’s as possible on the inside corner.
That’s about all you can do on the exhaust.
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Old 11-04-2021, 01:52 PM   #11
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Yeah my worry was cooling passages since I don’t have a tig welder to fix any mistakes. Worst case scenario trial & error and pull another junkyard head or have someone fix my damage. We’ll just have to see, I appreciate any and all tips for the head though!
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Old 11-07-2021, 08:39 AM   #12
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Racers edge in Tucson, AZ.
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