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 Post subject: WTB: B230FT performance parts...
PostPosted: Tue Feb 26, 2019 11:22 am 
Somehow completely sideways in 4th

Joined: Thu Nov 10, 2011 11:43 am
Posts: 243
Location: Regina, SK
Hi guys,

Posting this on behalf of my friend Rob who just bought an '87 Volvo 740 Turbo manual wagon. Head gasket is gone, so this is one of those "while we're at it... " situations where it would be nice to make improvements.

Thanks to Matt the focus will be to just improve air flow. Would also like to keep repair time to a minimum, so looking for the following:
  • TD04HL-16T straight flange with downpipe ideally
  • 531 head

Cur currently had a 530 head, with a tired TD04-12? turbo in it. Going to keep the cam stock for now, and will hopefully implement some of Craig's combustion chamber improvements, as well as a 3 angle valve job before reassembly.

I'll also bug Rob to chime in and maybe to do a bit of a project build on this car as it's pretty neat car that should clean up REALLY nicely.

Thanks,

Rabin


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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Tue Feb 26, 2019 6:51 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 7:14 pm
Posts: 1875
Location: Missing my garage in Sunnyside
If the power goals are modest, and they should be if he's sticking with the 87 block, don't worry about a 531 or getting fancy with head work.
Update the exhaust manifold, turbo, exhaust and that will unlock most of the restrictions until he gets a hotter cam. Even with the stock camshaft that will be maxing out the stock fuel system and potentially blowing up the transmission, if the block hasn't already vented.
I'd look for a proper (90+)long block, or complete engine if I was him.
All that said, I've been out of the Volvo game a long time so...

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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Tue Feb 26, 2019 11:13 pm 
Somehow completely sideways in 4th

Joined: Thu Nov 10, 2011 11:43 am
Posts: 243
Location: Regina, SK
Thanks for the input! I've only absorbed the odd red block details from reading about other peoples builds, but now that I'm helping Rob with the replacing the head gasket on this 740 I'm trying to remember the details.

531 head was more of a 'hail mary' as it'd be nice to have a second head rebuilt and ready to install, and since the 531 was supposed to be better that's what I threw on the list. Car came with a 90+ manifold, with a stock Garrett attached that feels good, but it didn't come with any lines (No idea how involved it is to switch from TD04 to T3), and I'm not sure the current downpipe would work on the T3 either. "while we're at it..." dictates if the turbo needs rebuilding, and the T3 needs a new downpipe AND new lines, then a 16T with a big straight flange might be the better choice as it should flow much better, and just need a new downpipe. I've only experienced a 16T in a 98 V70 T5m and I was really impressed with the quick spool and power delivery. I also quite like the TD04 turbos...

Computer is going to be stock for the time being so it will just move more air at stock boost settings for now. If we can line up a 16T for the install then I'll rebuild it if needed and port the manifold and exhaust housing like I did on my 00R... (I quite enjoyed that...)

All that said this really is just a stock+ build trying to improve air flow as much as possible where we can. Might not have super high power goals, but the improved efficiency should be a secondary benefit. Reliability will be a definite concern though so if a 16T is going to be too much even at stock boost levels then we can rethink, or lower boost further until a suitable built motor shows up. (Right Rob?)

Rabin


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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Wed Feb 27, 2019 12:17 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 7:14 pm
Posts: 1875
Location: Missing my garage in Sunnyside
If you can find a 531, which I doubt, it will cost way more than it's worth, for Robs needs. The stock head with bolt ons, will flow more than enough to blow up the stock rods, clutch, transmission.
These are tractor motors, built for more torque than hp (notice every variant has more torque than hp). Improvements to flow are mostly going to benefit power above 4000. Does Rob spend much time in that rpm range?
Just get a good stock 530, clean it up, do some mild porting if you want and focus on getting air out of it as efficiently as possible. I bet the 90+ manifold hasnt even had the collector ported.

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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Wed Feb 27, 2019 12:34 pm 
Somehow completely sideways in 4th

Joined: Thu Nov 10, 2011 11:43 am
Posts: 243
Location: Regina, SK
Great advice!

What's your thoughts on the 16T then? Too much turbo? Better to use the stock Garrett and find / change the necessary lines? Rebuild the stock TD04-12? (It's a 12 something)

This is mostly about fixing it right and making the best bang for the buck improvements while we're at it. Reliability is more important that power, but it's still nice if the car has some giggle factor in it when it comes on boost. :) (That last part might be more my preference than Rob's...)

Rabin


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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Wed Feb 27, 2019 1:06 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 8:40 pm
Posts: 3409
Location: Calgary, Ab
Athal's right on the money. If you can find a 405 head, which is far more likely, you can gain most of the benefits of the 531 and they were pretty common in Canada at one point. The only 531s you're likely to find in NA are from boats, so they're often rotted out or have that anode ring in the #4 exhaust port. The 405 only came with K-jet so you'll have those injector holes to deal with, but you'll have those injector holes to use if you want to also use the K-jet intake manifold which has a bigger plenum and larger diameter runners. Again, under 6k RPM you probably won't see much benefit, but you also won't lose much where the engine is happy either. But the 530 is a drop-on, bulletproof, common-as-dirt head that'll more than satisfy a small-rod, LH2.2 engine.

I still say to stick with the stock Turbo cam but if you do upgrade to anything I wouldn't go beyond the Enem V15T or IPD Turbo cam, same-same. They maintain most of the bottom end but open up the top some more (beyond the 6k fuel cut), and if you've already uncorked the head/manifold/turbo/exhaust that'll be the next step. It's a quick & easy swap with the engine in the car so don't bother spending that money now, I say.


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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Wed Feb 27, 2019 1:18 pm 
Somehow completely sideways in 4th

Joined: Thu Nov 10, 2011 11:43 am
Posts: 243
Location: Regina, SK
So what about turbo for a max 6K redline? Quick spool and not strangling the motor at redline is sufficient for sure. Be much happier with a nice flat torque curve with excellent drive ability than shoot for all out power.

Already have the 90+ manifold, that also has a decent feeling stock T3 on it, but no lines came with it except the hard lines bolted to the turbo. I'll try to get a picture of it, or get Rob to post pictures of what we have to work with.

530 head sounds like the way to go, so will likely just get this one done since it's what we have. Any recommendations for decking it? Matt already recommended Ehlring gasket set, and 3 angle. I was just going to unshroud the intake valve a little following the basics of what Craig showed in his 242 engine build, but not nearly as pretty, and do some port matching on intake and exhaust sides. Will also port 90+ outlet and exhaust housing. :)

Only uncertaintly now is what turbo to go with - So thoughts and recommendations are appreciated. Guy on FB has a 16T with a straight flange for $150 which is what I thought would be a good fit - but maybe it's too much turbo? Stock TD04 on it looks really restrictive - but I've never even driven a 740 Turbo.

Rabin


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 Post subject: Re: WTB: B230FT performance parts...
PostPosted: Wed Feb 27, 2019 5:08 pm 
Haha, I just built a W24 Octo-Turbo, now what?!
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Joined: Wed Dec 21, 2005 8:40 pm
Posts: 3409
Location: Calgary, Ab
I think a TD04HL-15G from a stock T5 850 would be a good choice. That car makes ~225 hp stock, so does the 5 speed Saab 9000 Aero 5 speed which comes with a similar turbo. I think that's what's on Craig's B230FT at the moment. I've never driven it myself, but I've been in it when he's got the fizz and it's quite exhilarating. Certainly not lazy.


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