Buick 225 V6 odd-fire performance.... - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 08-17-2012, 06:58 PM   #1 (permalink)
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Buick 225 V6 odd-fire performance....

I'm trying to figure out what to do with my 'spare'.....



I'd like to hear about how people use to build these things back in the day....

How should I build it?
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Old 08-17-2012, 07:24 PM   #2 (permalink)
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Found some good stuff prowling around here.
earlycj5.net

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Old 08-17-2012, 07:40 PM   #3 (permalink)
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Quote:
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Found some good stuff prowling around here.
earlycj5.net
Yep, I think there is someone on there that races one!
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Old 08-17-2012, 07:54 PM   #4 (permalink)
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Id keep it stock, Its getting pretty hard to find these motors.
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Old 08-17-2012, 07:55 PM   #5 (permalink)
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Read about a 225 putting out 500 hp.
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Old 08-17-2012, 07:57 PM   #6 (permalink)
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Id keep it stock, Its getting pretty hard to find these motors.
I have more than one

Stock...what is the fun in that!
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Old 08-17-2012, 07:58 PM   #7 (permalink)
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Read about a 225 putting out 500 hp.
Article?
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Old 08-17-2012, 08:08 PM   #8 (permalink)
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I think it was in earlycj5. Hottest 225 or Dauntless. I'll try and find it.
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Old 08-17-2012, 08:13 PM   #9 (permalink)
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This one?

http://www.earlycj5.net/forums/showt...25+performance
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Old 08-17-2012, 08:27 PM   #10 (permalink)
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Yep you found that quick.
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Old 08-17-2012, 08:43 PM   #11 (permalink)
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I have more than one

Stock...what is the fun in that!

I wouldn't know, since I can't leave anything stock.
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Old 08-18-2012, 05:38 AM   #12 (permalink)
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Ken Belle Buick is the aftermarket performance guy for this motor. However, unless the 225 is being used for a period correct restoration of a Kaiser CJ5A it's not worth wasting time on. A newer 231 with EFI would be the wise choice. The whole retro thing is kinda cool, but way better performance can be had from the newer EFI. Not to mention the huge Grand National aftermarket support for this revised version.
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Old 08-18-2012, 07:02 AM   #13 (permalink)
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Bah!

I already have a nice spare engine. Why not do something with it? I'm not interested in EFI at this point at all......

I do think that some of the newer 231 heads could be a fun upgrade. It sure opens up the intake manifold choices. Anyone have any details on running even fire heads on an odd fire block?

Maybe I should find a 4.1L even fire and turn it into an odd fire motor just to make people scratch there heads. Crank should fit. Pistons could be difficult? The cam would need to be different.....

Anyways. The little odd fire ran around for a lot of years and has a strong performance heritage. I think that the knowledge just got lost a little bit over the years. Heck, I don't think Kenne Bell even makes parts for these motors anymore?
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Old 08-18-2012, 07:10 AM   #14 (permalink)
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Not trying to hyjack the OP's post, but I have the even fire 231 in my Willys and it needs rebuilding or replacing. Will the fore mentioned EFI 231 bolt right in it's place? I wouldn't mind fuel injection and these motors are actually easier to find than a '78 era one.
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Old 08-18-2012, 07:15 AM   #15 (permalink)
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Not trying to hyjack the OP's post, but I have the even fire 231 in my Willys and it needs rebuilding or replacing. Will the fore mentioned EFI 231 bolt right in it's place? I wouldn't mind fuel injection and these motors are actually easier to find than a '78 era one.
I think when most people are talking about fuel injected 231 even fire motors they are talking about retrofitting with a GM TBI style system from something like a 4.3 v-6.

There where some late model fuel injected 231 engines like the turbo versions but you don't see those in jeeps too often.

Some of the buick 3800 engines in FWD applications had fuel injection also. I don't know if I have ever seen that retrofitted onto an older 231. I think the throttle body faces the rear ( bellhousing ) of the motor.
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Old 08-18-2012, 07:21 AM   #16 (permalink)
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used to have a 231 odd fire balanced 327 rods 11 to 1 pistons isky cam ported heads offy manifold holly headers t 10 4 spd in a stripped 67 cj5 sand jeep with 31x15x15 terra tires. was a holy terror in the sand. 2 wd hi anywhere you wanted to go at pismo beach including devils slide at the end of the beach before they closed it in the 70's. mash the pedal and hold it on the floor all day long
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Old 08-18-2012, 07:50 AM   #17 (permalink)
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Not trying to hyjack the OP's post, but I have the even fire 231 in my Willys and it needs rebuilding or replacing. Will the fore mentioned EFI 231 bolt right in it's place? I wouldn't mind fuel injection and these motors are actually easier to find than a '78 era one.
I just sold a 1998 Oldsmobile Intrigue my wife drove for a few years. The 3800 would bolt right in its place, and a have a flashable pcm and coil packs.
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Old 08-18-2012, 11:46 PM   #18 (permalink)
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The thought of old school mods on the 225 is appealing to me.

Does this help it rap up? They just don't seem to wind up quick. Fly wheel I guess.
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Old 08-18-2012, 11:57 PM   #19 (permalink)
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My 225 would pop a wheelie (no shocks) and run for hours without water.
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Old 08-19-2012, 09:31 AM   #20 (permalink)
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Mine has plenty of grunt. Will definitely bark the tires with the 4.88s.

Will get rid of the points though.
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Old 08-19-2012, 11:36 AM   #21 (permalink)
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[QUOTE=Mieser;14696893]Bah!

I already have a nice spare engine. Why not do something with it? I'm not interested in EFI at this point at all......

I do think that some of the newer 231 heads could be a fun upgrade. It sure opens up the intake manifold choices. Anyone have any details on running even fire heads on an odd fire block?

QUOTE]

A couple of guys have run EFI on the OF 225.
http://www.earlycj5.net/forums/showt...-on-Megasquirt

Found this on Novack's site about 1/2 way down "Back to Buick". Different crank, cam, dist, heads and intake.
http://www.novak-adapt.com/knowledge/buick_90_v6.htm
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Old 08-19-2012, 04:49 PM   #22 (permalink)
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Personally, I don't want to deal with all the electronics required for fuel injection. I like my mechanical fuel pump and flat head screwdriver simple Autolite 2100 carburetor.

TBI style EFI is possible on an odd fire with an additional rpm signal. The signal coming from the HEI is just too 'raw' for a straight up conversion from what I have researched.
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Old 08-19-2012, 05:24 PM   #23 (permalink)
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The biggest obstacle when doing EFI on the 225 is the firing sequence. It fires at 150, and 90 degree intervals. The crank trigger has helped them overcome this, but I'm not sure how they get the ECM to fire at the uneven intervals.
The 225 is really a Buick 300 with the front cylinders cut off. The 300 was the Buick workhorse of the 60's.
Edit: Duh, they ground the uneven firing into the reluctor wheel!
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Old 08-20-2012, 08:24 AM   #24 (permalink)
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One thing that seems to come up a LOT in researching 225 odd fire performance is split duration camshafts....

Engle Racing Cams still lists a wide variety of cams for the odd fire engine in their catalog....

http://www.englecams.com/
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Old 08-20-2012, 09:41 AM   #25 (permalink)
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the other thing was the rods. they are notorious for chucking a rod. Swap in later model rods if you're gonna rev it any! Have seen several blocks with a nice chunk sticking out through the side!
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