Will be interesting to see your B21 build progress, I haven't seen one being done up myself.
Hopefully parts are readily available for the B21?
R-Sport B21AT turbo build
All heads fit a B21, however unshrouding valves is not 100% possible due to the edges of the chamber matching the bore size. A 405 head from a B23 does fit though.
GreenGLWill be interesting to see your B21 build progress, I haven't seen one being done up myself.
Hopefully parts are readily available for the B21?
For the most part, yes, though "A" pistons (with the dish) are hard to come by. GCP had 5 in a 0.50mm overbore with no plans to get more. I decided not to overbore as my clearances were still in-spec for standard bore.
As others have pointed out, beyond that the B21 and B23 are very similar for parts.
jamesinchttps://ozvolvo.org/discussion/comment/180102#Comment_180102
For the most part, yes, though "A" pistons (with the dish) are hard to come by. GCP had 5 in a 0.50mm overbore with no plans to get more. I decided not to overbore as my clearances were still in-spec for standard bore.
As others have pointed out, beyond that the B21 and B23 are very similar for parts.
Good to hear, should be minimal hiccups in your build then :)
And nice to know some of the parts interchange, I still have plenty to learn on these cars.
14 days later
Block is cleaned up now, still waiting on a couple more parts before I can really reveal what my goals are here! Unfortunately due to FedEx being shit, all the parts I'm getting with @VolvoHordz are still out there somewhere in a dusty corner of some warehouse ?
And I forgot to order freeze plugs! So I have to track down some of those first.
How big is that bore worn? There's a bit there gauging on the top of the bores.
11 days later
Check out these Glyco bearing shells, pretty bad corrosion! Fresh out of their vac wrap. They've obviously sat for a very long time.
Top weather led to more progress on the block today!
James we carry freeze plugs at Autobarn. Just measure the size you need and give your local shop a call.
nugget_940James we carry freeze plugs at Autobarn. Just measure the size you need and give your local shop a call.
That's good to know, I already have some Volvo ones for this block now. I tried the Repco near me but they didn't have shit.
Finishing what I started yesterday, today I cleaned up the sump, removing a couple of dents along the way.
- Edited
Small update of the past few days' work. Finished cleaning the pistons, checked all the clearances, checked ring end gap, everything nominal. Installed new head alignment dowels and assembled pistons onto rods. Holding off installing rings on pistons until I have the crank bearings, auxiliary shaft bearings, and remaining freeze plugs sorted and the crank installed. Then I'll do it all at once and install pistons as I go.
I use Redline assembly lube on moving parts as I assemble them. It's good but if you're planning to let the engine sit for a very long time before running it, consider something with more tack like royal purple.
Edit: after looking at the above photo I was concerned I'd put the #3 rod on backwards, but on closer inspection it is correct and for some reason this rod has the cast markings reversed.
5 days later
I'm waiting on aux shaft bearings for at least a few more weeks so won't have much to report here I'm afraid. I've torn down some hoses, I'll take them to Pirtek at some point to be remade:
I suspect many of you have started to work out what I'm building.
No idea! Looks like AC and/or PS hoses...baffling! :)
Jurbo?
Headaches.
You’re building headaches.
I think that it is cool, but only because they will be your headaches.
SpacI think that it is cool, but only because they will be your headaches.
Yeah so as hinted in photos and Spac's comments, this is going to be a B21AT build, utilising the R-Sport carby turbo kit.
It's been quite a ride so far. The original TB03 turbo is trash (let's face it, it's a crap turbo). I'm going to be running a new GT2252S.
The R-Sport kit I bought from @Spac in 2015 I think, and I bought the B21A from @Angus242164 also in 2015, and the whole lot has sat in my garage ever since.
This is very much a desire build, I'm not chasing crazy power, it will make like 5psi because I'm pretty sure the Zenith CD175 won't flow enough fuel to go above that.
I'm deleting the mechanical fuel pump as the original boost-referenced pump is too hard to come by and I honestly can't be bothered modifying one. This will be a conversion from K-Jet so the car will already have a return system and I'd rather run an electric pump that can utilise that, so that I don't have to re-plumb the fuel system.
- Edited
Here's a couple more photos that I didn't want to share while I was still working out the details of the project.
I had the old powdercoating blasted off the micro-intercooler, I'm going to clean up the rough casting and have it powdercoated. As a final step I'll skim the lettering on a mill. In a tragic industrial accident, the charge air pipe that goes over the top of the valve cover was badly damaged. My machinist is fabricating a new one to match the original.
This nut was pitted and rusted from storage, I skimmed it on the lathe and filed it back into shape, then blued it (heat with a torch until cherry red, drop in oil). What is overkill? ?
Test fitting parts just to see how it looks. The cover plate was hot tanked and then clearcoated. These cast aluminium parts are very porous so if you don't clearcoat them they'll become an oily mess as soon as you put fingerprints on them.
New freeze plugs thanks @ramrod and @iceton1975. I used a 24mm impact socket and a mini sledge hammer (short handle, very heavy). Permatex Aviation form-a-gasket no. 3 on the sealing surfaces.
I'm waiting on a lot of parts at the moment. I'm also gathering parts to be zinc plated. I also need to re-make the oil cooler hardlines that go from the sandwich plate to the block. The box of parts I got from @Spac has the oil cooler hardlines from a 740T and while they will fit and do the job, this is an R-Sport build and I'd like to reproduce the original hardlines.
Also it blows my mind that I actually found a source for the B21AT/ET carb jets IN AUSTRALIA (https://classiccarbs.com.au/)