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Old 10-01-2018, 05:11 PM   #1
pcaminos740
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Exclamation B230FT RODS: 9mm or 13mm??

Hello everyone!
I have a 740 turbo 1986 (b230ft), it has 9mm connecting rods. I would like to know if I can put the 13mm rods of a b230 (I think they came in the b230 since 90 or 91).

Another question.
Does anyone know these connecting rods are compatible with my car? I have to change pistons?

https://www.maxpeedingrods.com/Volvo...-Con-Rods.html

https://www.cxracing.com/products-by...olvo-1520-01x4

Thank you all!
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Old 10-01-2018, 09:11 PM   #2
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The small end width differs by .2mm looking at the links you provided.
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Old 10-01-2018, 10:36 PM   #3
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Grab the maxx speeding rods with ARP bolts. Should be bolt in and go. May need to lightly sand/debur the sides of the small end bushing so the pin slides in.
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Old 10-02-2018, 12:31 AM   #4
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Quote:
Originally Posted by pcaminos740 View Post
Hello everyone!
I have a 740 turbo 1986 (b230ft), it has 9mm connecting rods. I would like to know if I can put the 13mm rods of a b230 (I think they came in the b230 since 90 or 91).

Another question.
Does anyone know these connecting rods are compatible with my car? I have to change pistons?

https://www.maxpeedingrods.com/Volvo...-Con-Rods.html

https://www.cxracing.com/products-by...olvo-1520-01x4

Thank you all!
Again all the experts are advising without asking critical questions

Have you said exactly which pistons you're planning? Remind me
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Old 10-02-2018, 10:40 AM   #5
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Thank you for your answers!
On the other hand, do you think I can change my 9mm connecting rods to the 13mm of the b230ft '91 +?
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Old 10-02-2018, 10:45 AM   #6
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Originally Posted by pcaminos740 View Post
Thank you for your answers!
On the other hand, do you think I can change my 9mm connecting rods to the 13mm of the b230ft '91 +?
No point to upgrade from over done noodles to al dente noodles, just piss with the cock youve got and when you get the funds throw in some superbitchin rods and pistons.

Ive been running 9mm rods for 5 years with 200 whp and still no koolaid man. Ymmv
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Old 10-02-2018, 11:28 AM   #7
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Quote:
Originally Posted by John V, outside agitator View Post
Again all the experts are advising without asking critical questions

Have you said exactly which pistons you're planning? Remind me
stock is implied by the initial 9 vs 13 question.

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Old 10-02-2018, 11:50 AM   #8
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how psi stock cna support?

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Old 10-02-2018, 01:53 PM   #9
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I understand your point. But I have the possibility to get free 13mm connecting rods. What I would like to know if I can remove the 9mm connecting rods and put the 13mm ones.
what do you think?
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Old 10-02-2018, 02:53 PM   #10
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Quote:
Originally Posted by pcaminos740 View Post
I understand your point. But I have the possibility to get free 13mm connecting rods. What I would like to know if I can remove the 9mm connecting rods and put the 13mm ones.
what do you think?
They are a direct swap. If reusing the bearings or using new, check the rod to crank clearances.
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Old 10-02-2018, 03:22 PM   #11
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Quote:
Originally Posted by pcaminos740 View Post
I understand your point. But I have the possibility to get free 13mm connecting rods. What I would like to know if I can remove the 9mm connecting rods and put the 13mm ones.
what do you think?
yep. but for the effort, I'd spend some money and get the stock replacement hbeam rods personally. the 13mm rods are stronger but that's a relative thing.. the h-beams are WAY stronger.
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Old 10-02-2018, 05:45 PM   #12
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Quote:
Originally Posted by pcaminos740 View Post
Thank you for your answers!
On the other hand, do you think I can change my 9mm connecting rods to the 13mm of the b230ft '91 +?
Yes, of course. Obviously. Do you have them?
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Old 10-02-2018, 05:49 PM   #13
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Quote:
Originally Posted by linuxman51 View Post
stock is implied by the initial 9 vs 13 question.

Thank you oh great mind-reader..I was confused by the full text which asked about the H-beams.... and it suggested he was considering those by its inclusion...bad habit of mine to read what people write.

(I doan think you watched the whole video before responding)
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Old 10-02-2018, 08:13 PM   #14
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Originally Posted by John V, outside agitator View Post
Thank you oh great mind-reader..I was confused by the full text which asked about the H-beams.... and it suggested he was considering those by its inclusion...bad habit of mine to read what people write.

(I doan think you watched the whole video before responding)


I dare you looking at all the details posted by the OP!

Silly you, asking insignificant details before immediately considering your expert opinion to be essential to the good continuation of existence.

You should know better.
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Old 10-02-2018, 10:13 PM   #15
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Quote:
Originally Posted by Vincent Gagnon View Post


I dare you looking at all the details posted by the OP!

Silly you, asking insignificant details before immediately considering your expert opinion to be essential to the good continuation of existence.

You should know better.

Soory..I was confused..Din't get to sleepy-time till 0330 night before and 0420 this last night..
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Old 10-03-2018, 08:14 AM   #16
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Sounds like a twin turbo LS swap is needed.

How about just get some strong H-beam rods and not worry about noodle rods.
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Old 10-03-2018, 09:29 AM   #17
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Quote:
Originally Posted by John V, outside agitator View Post
Thank you oh great mind-reader..I was confused by the full text which asked about the H-beams.... and it suggested he was considering those by its inclusion...bad habit of mine to read what people write.

(I doan think you watched the whole video before responding)
they are stock replacement hbeam rods. sounds like you didn't read shit


but thanks for underlining my assertion ;)

Last edited by linuxman51; 10-03-2018 at 09:49 AM..
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Old 10-03-2018, 10:25 AM   #18
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Quote:
Originally Posted by linuxman51 View Post
they are stock replacement hbeam rods. sounds like you didn't read shit


but thanks for underlining my assertion ;)
OK, I'll play.

If you are planning to change the rods...which the OP is doing, why not change those heavy, discusting, immoral and offensive pistons?

Why deny yourself the secret of happiness?
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Old 10-03-2018, 10:27 AM   #19
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Quote:
Originally Posted by centason View Post
Sounds like a twin turbo LS swap is needed.

How about just get some strong H-beam rods and not worry about noodle rods
.
Because they're FREE and this is TB.

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Originally Posted by Vincent Gagnon View Post
OK, I'll play.

If you are planning to change the rods...which the OP is doing, why not change those heavy, discusting, immoral and offensive pistons?
Don't take his kodachrome away!
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Old 10-03-2018, 10:32 AM   #20
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Originally Posted by Redwood Chair View Post
Don't take his kodachrome away!


I'm beginning to think that there is a lot of people around here who have this christian idea of "suffering on earth to gain access to paradise".

How else would you explain this pathological repulsion for building a fun car?
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Old 10-03-2018, 10:40 AM   #21
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Originally Posted by Vincent Gagnon View Post


I'm beginning to think that there is a lot of people around here who have this christian idea of "suffering on earth to gain access to paradise".

How else would you explain this pathological repulsion for building a fun car?
He has what he has and wishes to diddle around with what he has to alleviate his boredom, just to do something else with his hands other than tickle a mouse for the man in a cubicle.

IE typical 'new TB'.


Last edited by Redwood Chair; 10-03-2018 at 11:40 AM..
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Old 10-03-2018, 10:43 AM   #22
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People either don't have the funds or don't want to spend for rods/pistons. The op stated he may receive 13 mm stock rods for free. Not that hard to understand. Most people don't need to go to H-beam rods. Blow your motor up, grab another one from the junkyard. This is tb after all. For the people with serious builds, upgrading pistons/rods is a no brainer.
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Old 10-03-2018, 10:44 AM   #23
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Originally Posted by Vincent Gagnon View Post
OK, I'll play.

If you are planning to change the rods...which the OP is doing, why not change those heavy, discusting, immoral and offensive pistons?

Why deny yourself the secret of happiness?
no lofty power goals, no desire to spend an extra ~$600 (and hey if you're doing that, you may as well get the longer rods for her pleasure). Your boy routinely disparages the 'noodly' 13mm rods, and he's not wrong for it.. they bend pretty easy. maybe not as easy as the 9mm rods, but still.

so.. cheap insurance relative to the rest of it. the stock pistons have few if any issues hitting probably double the power of the average tbricker (ok, ok, triple.)

The only probable disgusting and immoral component in OP's car would be the 8v cylinder head.
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Old 10-03-2018, 11:06 AM   #24
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Stop projecting, the OP has clearly stated what he's doing and going to do.

Yes they will swap.

[/THREAD]
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Old 10-03-2018, 11:28 AM   #25
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Originally Posted by Redwood Chair View Post
Stop projecting, the OP has clearly stated what he's doing and going to do.

Yes they will swap.

[/THREAD]
actually I talked to OP, I know *exactly* what he's wanting to do (and not do) so, . My initial post STILL holds up.


I just find it hilariously amusing that the baseline assumption from some people would be "aftermarket pistons" when the thread title itself is 9mm or 13mm rods. I mean.. who in their wrong mind would even put custom pistons on top of 9mm rods (and yet, if they did, the other rods would STILL SWAP). OP was/is talking about stock rods in a stock engine, but


AFTERMARKET PISTONS BABY!


I'll casually wait for the incoming straw-engine argument and suggestions about relative experiences, etc.
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