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ZVOLV
06-13-2004, 02:09 PM
So how many versions of the volvo 4 banger 16v boat motor are there? I am a boating guy (hence my avitar) and I have access to boat engines. I am thinking about going with one. Obviously with diferent pistons. Please let me know what info you guys have on these motors. Is there a 2.3 or is it only a 2.5?

Pennybridge Pioneer
06-13-2004, 03:23 PM
why would you not want a 2.5 :???: i say aq171 (2.5 16v head) or aq151 (2.5 8v w/ 531 head and i think a v cam)

mAydAy
06-13-2004, 06:28 PM
There was an AQ171A and AQ171C. Both 2.5l 16v with pZ cams. Stay away from the A. It had small mains and was based on the 9mm rods iirc.
AQ151C is the same as an AQ171C but 531 head with V-cam.

Penta also sold a marinized GM 3.0l 4banger, I'd steer clear of it. Thats the AQ130/AQ131 iirc and some other nomenclatures possibly.
-Andy

Mapleleafer
06-15-2004, 11:48 PM
Here's the poop;
AQ131 = 2.3L (80MM stroke) 8v with 1000531 head and "A" cam
AQ151 = 2.5L (86MM stroke) 8v with 1000531 head and "A" cam
AQ171 = 2.5L (AQ151/B230 type, not B234F design) 16V

Blocks produced before 1988 used small mains and 9mm rods, 1988+ = 63mm mains and big rods.

SUPPOSEDLY... the AQ151 and AQ171 use the same 152MM long conn rods as the B230 engine, and use a 3MM shorter compression height (wrist pin to piston crown) to compensate for the longer stroke.

If you have a lead on a 2.5L crank (151 or 171) with large journals, let me know. I've been holding off on my project for one but will have to complete it as 2.3L if I don't find one soon.

240Psycho
06-15-2004, 11:57 PM
its funny cause i see these engines all the time where i live. infact theres a boat thats been sitting for a year with 2 volvo motors in it. off course its a bayliner:roll:

n xntrx volvo
06-16-2004, 12:15 AM
its funny cause i see these engines all the time where i live. infact theres a boat thats been sitting for a year with 2 volvo motors in it. off course its a bayliner:roll: where?:twisted:

volvo944ti
06-16-2004, 12:16 AM
whats wrong with bayliners they make great canidates to take engine out of adn have one hell of a bonfire with the hull. lol

ZVOLV
06-16-2004, 01:12 AM
Here's the poop;
AQ131 = 2.3L (80MM stroke) 8v with 1000531 head and "A" cam
AQ151 = 2.5L (86MM stroke) 8v with 1000531 head and "A" cam
AQ171 = 2.5L (AQ151/B230 type, not B234F design) 16V

Blocks produced before 1988 used small mains and 9mm rods, 1988+ = 63mm mains and big rods.

SUPPOSEDLY... the AQ151 and AQ171 use the same 152MM long conn rods as the B230 engine, and use a 3MM shorter compression height (wrist pin to piston crown) to compensate for the longer stroke.

If you have a lead on a 2.5L crank (151 or 171) with large journals, let me know. I've been holding off on my project for one but will have to complete it as 2.3L if I don't find one soon.


How is the 171 different than the b234 motor. I want a 16v 2.5 motor. Are you telling me I cant have the best of both worlds? (2.5 and 16v)

Pennybridge Pioneer
06-16-2004, 01:17 AM
aq171c IS a 2.5 w/ a 16v....it is a b230 based engine block, but redesigned for the 16v head. the b234 was volvo's automotive 16v block and is pretty much different from the b230 we know and love. Basically the aq171 is the result of stuffing a 16v head on your b230 engine....uh...yeah....and its 2.5 litres.....and has pz cams which are rumored to be better than the n/a b234f cams, but dunno how they work for turboocharging....

ZVOLV
06-16-2004, 01:42 AM
whats the difference between the marine and the auto volvo engine? I have a chevy 4.3 car engine in my boat and the block is the exact same as the auto block. It just uses stronger pistons, higher revving cam and valve springs (since boats operate at high rpms full throttle most of the time), and some marine accesories.

The b234 is a different block than the b230 already because of the timing belt and balance shaft belt stuff.

So why wouldnt I want to get a 2.5 marine engine and go put it in my car? I would get different pistons and cams and probably do a rebuild.

Unregistered
06-16-2004, 08:03 AM
The b234 is a different block than the b230 already because of the timing belt and balance shaft belt stuff.



And oilpump!

linuxman51
06-16-2004, 12:36 PM
whats the difference between the marine and the auto volvo engine? I have a chevy 4.3 car engine in my boat and the block is the exact same as the auto block. It just uses stronger pistons, higher revving cam and valve springs (since boats operate at high rpms full throttle most of the time), and some marine accesories.

The b234 is a different block than the b230 already because of the timing belt and balance shaft belt stuff.

So why wouldnt I want to get a 2.5 marine engine and go put it in my car? I would get different pistons and cams and probably do a rebuild.

do it! what're you waiting on?

oldschoolvolvo
06-16-2004, 02:12 PM
Just wondering...has anyone actually done this swap, or is this something new? (It sounds like a good idea though:))

davidmacq
06-16-2004, 04:38 PM
I think it's just a matter of simplicity and what parts you want to use, and whether you want it to have a turbo. So unless your looking at a 2.5 NA app your looking at using parts from both motors.

I'm interested to hear what keeps you from swapping in a whole motor. I'm not sure, but I do think there are some differences. Distributor? I'm not a mechanic, but I think if you look up a picture of the engine you can see some slight differences.

If you search I had a thread talking about best of both worlds. 2.5L F+T, high compression 2.5L. I think it's just a matter of someone tracking down some of these engines.

The Aspirator
06-16-2004, 04:57 PM
So why wouldnt I want to get a 2.5 marine engine and go put it in my car? I would get different pistons and cams and probably do a rebuild.
There's no reason why you wouldn't want to. Besides what's already been said, a B234 car engine has the timing belt tensioner on the block, hence why you need that special tensioner to slap an auto 16v head onto a B230 block. But the Penta 16v head has the tensioner on the head, and is basically slapped on a B230 2.5L block.

I've got two Penta engines in my garage, one is an AQ125c (2.3L, 9.8:1, 160 head), and the other is an AQ125A I think (2.3L, 9.8:1, 531 head). I forget if they have forged cranks and rods or not, I'll have to check. The distributors are definatly different than our auto dizzy's. Sooo, other than the small things, like dizzy, alternator, motor mounts, wiring and sensors, etc.... there isn't any reason why you can't just pop a complete Penta longblock into your car. We put a penta shortblock into my brothers 242.

So if I'm not mistaken, the only parts to make a normal B230 into a 2.5L is just the crank and pistons correct????????????? Someone wanna confirm that for me?

John

MikeHardy
06-16-2004, 05:41 PM
But the Penta 16v head has the tensioner on the head, and is basically slapped on a B230 2.5L block.

yep and you should be able to use that tensioner to put a 16V head on a B230 block. the head has bolt holes for stuff like that you've just gotta find it.

ZVOLV
06-16-2004, 10:18 PM
I have sources for boat motors but I havent been able to call them yet. I just got a job selling supercomputers and data storage systems so I have some $$ coming my way so I am ready to get crazy with project volvo. If you need a server or 2-200 terabytes of storage let me know.

I just need to know what to look for. Does anybody have that pdf with the penta motors that somebody posted here a while ago?


So the 171 is the 2.5 16v? Where is that stamped/marked on the motor? I guess the 2.5 penta is nothing new in the european volvo car community.

ZVOLV
06-16-2004, 10:28 PM
Here is what I found. http://www.lidingomarin.se/pdf/Volvo/SECTION%2003.PDF

ashvolvo
06-16-2004, 10:49 PM
Penta cranks are forged.

For info on a tensioner as ravenexus mentioned, check www.ovlov.net - Dick Prince sells them.
However I do believe that others have had some success with other alternatives.

I dont know heaps about it, my research hasnt got me too far with this topic.
But the above may/may not be handy.

Regards,
Ash

The Aspirator
06-17-2004, 12:26 AM
By the way, my Penta engines say AQ125 on a little plate located around the starter. Let me find that pic I took..... This is where the starter goes.

http://www.vipinfoservices.com/john/images/pentamodel.jpg

John

The Aspirator
06-17-2004, 12:40 AM
Also, I just figured out that my AQ125's have forged cranks and M rods.

John

spongemonster
06-17-2004, 03:17 AM
So could I get some pz cams and use them on my B234f and get some more power outta that sucker (I'm not planning on boost anytime soon)
James

ZVOLV
06-17-2004, 03:35 AM
I wouldnt even know where to start as far as cams go for this motor in a boosted application. I wouldnt want to run marine cams I know that much.


Time to start hunting for a AQ171.... Too bad they dont have oil squirters. Maybe I will get a hybrid (93?+ block w/ 2.5 crank and custom pistons and 16v head).

So the word on the street is the aq171 based head has the tensioner on the head...? So does that mean direct bolt up with the b230 block?

The Aspirator
06-17-2004, 04:00 AM
I think that Raven picked up some marine cams for his 16v, hopefully he'll chime in here. I thought I read somewhere that they're better than the auto cams for a performance application.... maybe.

So the word on the street is the aq171 based head has the tensioner on the head...? So does that mean direct bolt up with the b230 block? I believe so, yes. Then of course you need both manifolds, modified downpipe, and maybe different intake piping. Still not a huge deal. From what I've heard, even the Penta 16v's have trouble with snapping timing belts, just like the auto ones..... but that's like fifth-hand knowledge there..

Be a good idea to slightly rebuild it too. Ohh and the 16v cam gears use a different style of timing belt, it's got rounded teeth as opposed to square. So you'll either have to use auto cam gears or convert your intermediate shaft gear and crank pulley to the round tooth style. By the way, Dale (245gti) can drill the 16v gears just like the auto ones for adjustable timing.

John

MikeHardy
06-17-2004, 04:59 AM
So the word on the street is the aq171 based head has the tensioner on the head...? So does that mean direct bolt up with the b230 block?
the cam tensioner from a AQ171C 16V would mean that any 16V head (B234F/AQ171) would bolt onto B23/230 block.

yeah i've got penta cams in my 242, there little taller and fatter of lobe then the stock U1 cams. pull more vacum at idle andsound mean through out the rev range, sound bloody evil when revved upto 5000+

ZVOLV
06-17-2004, 11:14 AM
Damn it! My best source didnt even have a Volvo motor.

Is just the crank make it 2.5 or is the bore bigger too? Where can you guys get the motors?

socalsean
06-17-2004, 12:10 PM
watch out for used volvo boat engines. Salt water likes to eat and corrode everything in it's path. try to get a boat engine that only saw fresh water use. my dads getting a custom built boat......built one at a time by small firm in sacramento and he's been talking to the guys about locating one of these engines for me in the deal. sheeze....for 160k, I better be getting a used engine in the deal! hahahaha.

NORCALSEAN

The Aspirator
06-17-2004, 02:43 PM
Damn it! My best source didnt even have a Volvo motor.

Is just the crank make it 2.5 or is the bore bigger too? Where can you guys get the motors?Dude, it's been said above. Crank and pistons make it 2.5L.
SUPPOSEDLY... the AQ151 and AQ171 use the same 152MM long conn rods as the B230 engine, and use a 3MM shorter compression height (wrist pin to piston crown) to compensate for the longer stroke.
So all you really need is the crank, pistions, and a 16v head from a penta and you can build one KILLER B230... err... B250 I guess. I might just do that one day, although I'm staying 8v.

John

davidmacq
06-20-2004, 03:52 PM
http://www.carolina-vacation.com/cgi-local/bbbwanted.pl?read=6776
http://www.carolina-vacation.com/cgi-local/bbbwanted.pl?read=6940
http://www.carolina-vacation.com/cgi-local/bbbwanted.pl?read=6925

Lord_Athlon
06-20-2004, 06:52 PM
Dude, it's been said above. Crank and pistons make it 2.5L.
So all you really need is the crank, pistions, and a 16v head from a penta and you can build one KILLER B230... err... B250 I guess. I might just do that one day, although I'm staying 8v.

John

Wouldnt it be a B254 =P

davidmacq
06-20-2004, 11:59 PM
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR><TD class=HT vAlign=top width="100%"><TABLE class=TH><TBODY><TR><TD noWrap>From : </TD><TD>Scott Webb webbsmarine@yahoo.com</TD></TR><TR><TD noWrap>Sent : </TD><TD>Sunday, June 20, 2004 10:01 PM</TD></TR><TR><TD noWrap>To : </TD><TD>dave macq <dmacq1@hotmail.com></TD></TR><TR><TD noWrap>Subject : </TD><TD>Re: aq151 aq171</TD></TR><TR><TD style="PADDING-BOTTOM: 0px">http://64.4.55.45/spacer.gif</TD><TD style="PADDING-BOTTOM: 0px" width="100%"></TD></TR></TBODY></TABLE></TD><TD class=HT vAlign=top align=right><TABLE cellSpacing=0 cellPadding=2 border=0><TBODY><TR><TD>http://64.4.55.45/i.p.previous.gif (javascript:S('getmsg','','','','','MSG1087786923. 25','','','prev'))</TD><TD>|</TD><TD>http://64.4.55.45/i.p.next.gif (javascript:S('getmsg','MSG1087785186.12','945585' ,'4832','','MSG1087786923.25','0','','next'))</TD><TD>|</TD><TD>http://64.4.55.45/i.p.delete.gif (http://by7fd.bay7.hotmail.msn.com/cgi-bin/getmsg?msg=MSG1087789572.11&mfs=&_HMaction=move&tobox=F000000004&direction=next&curmbox=F000000001&a=cde041fd6e4876631e5b580c6f8839fa#)</TD><TD>|</TD><TD noWrap>http://64.4.55.45/i.p.folder.inbox.gifInbox (javascript:HM('curmbox=F000000001')) </TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR><TD style="PADDING-BOTTOM: 5px" width="100%"></TD></TR></TBODY></TABLE><TABLE height=209 width="100%" bgColor=#ffffff><TBODY><TR><TD vAlign=top><TABLE cellSpacing=8 cellPadding=0 width="100%" align=center border=0 nowrap><TBODY><TR><TD><SCRIPT><!--function Filtered(){return 0}//--></SCRIPT>i got an aq.151 &171 4 cylinder.....complete engine parts all there $150,00 u pay freight..on eather

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Which models you have a, b, c, etc. What is general price for whole engine.
Head, crank, cam, pistons

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