Anyone put a 351 windsor in an au

[BLACKAUXR8]

the 351 block has more metal in it. A stock 302 block will crack if you try and run anymore than around 450hp through it. So ive been told anyway i could be wrong!

[FGII-XR6]

i've been told by reliable sources that the blocks are the same

[BLACKAUXR8]

ill have to check that out. This will save me sourcing a late model 351 roller block. Cheers for that!!

[mikford]

sorry to pry guys but i`m 99 % sure the 351 is 1inch taller block, and your right about the torque, i have a 351 windsor with 302 closed chambered cleveland heads in my xc coupe and the sheet says 166.4rwkw @ 723Nm torque but only prob is the sheet dosn`t say rev range. love to have that power in my 5litre au xls..mick.

[Sledgehammer]

Yes I have done the deed and droped the 351 in my AU XR. It can be done, it isnt hard. Their are now a few floating around, the added cubic inches is very welcome and next time I will be going a stroker 351 up to say 408 or thereabouts, Ive dont mine for club and race use rather than street us but still easy to do, I ran it on the street with efi in its last guise.

Dont mind sharing all I know so send me a pm or fire some questions here.

I've got pics of mine with all the EFI gear on it as well if you would like to see these, you only have a few manifolds to choose from being the GT40 lower, TFS lower and a couple others, you need to think big as airflow is 20% greater than a 302 from the start as well.

Originally Posted by jimt3te50

I think Sledgehammer said he'd never do it again.........

Yep....I said that.

[Sledgehammer]

Originally Posted by mikford

sorry to pry guys but i`m 99 % sure the 351 is 1inch taller block, and your right about the torque, i have a 351 windsor with 302 closed chambered cleveland heads in my xc coupe and the sheet says 166.4rwkw @ 723Nm torque but only prob is the sheet dosn`t say rev range. love to have that power in my 5litre au xls..mick.

Yes correct, 1 inch taller.

[Sledgehammer]

Originally Posted by BLACKAUXR8

ill have to check that out. This will save me sourcing a late model 351 roller block. Cheers for that!!

I would not use a 351 roller block they are not the same. I used an early read 1969 block for the added strength. The real advantage over the 302 block is better rods, main caps thicker, 1/2 inch head bolts used, generally more metal etc but at a cost - weight.

If you are on an unlimited budget use an aftermarket block like a dart as the base, otherwise you will have to see what you can find the '51 blocks are not everywhere these days.

Blocks are also wider in the valley, compared to 302, so anyone whos knows what they are looking at will see this straight away.

[347 mont]

Originally Posted by au3xr6

use a 302 block the difference between the 302 & 351 is stroke IE crank & rods so with a 302 block the insurance co will never know

That is the case with cleveland motor but with the Windsor they ARE different blocks, the deck height is higher, 302mhas adeck height of 8.2, 351 has a 9.5 deck height and are wider

[toyotaxr8]

the mains in the 351w are 3inch and i think the 302w has smaller mains

[Sledgehammer]

Originally Posted by au3xr6

use a 302 block the difference between the 302 & 351 is stroke IE crank & rods so with a 302 block the insurance co will never know

Yes I would stroke the '02 to 347. No one would know. One of the above posts says 450HP max, thats pretty much close to mark with a 302 block as they are not structurally strong enough.

Originally Posted by toyotaxr8

the mains in the 351w are 3inch and i think the 302w has smaller mains

The 351W crank can be used in the 302W. Its offset ground to make the stroker, some combos below:

CID Block Bore OverBore Crank Stroke RodLength Notes
314 302 4 0.03 302 3.075 5.205 Offset grind crank to 3.075 / Likely uses turbo 4 cylinder rods 400 horsepower maximum
319 302 4 0.03 302 3.125 5.4 Offset grind crank to 3.125 / 500 horsepower maximum
331 302 4 0.03 302 3.242 5.2 Offset grind crank to 3.240 / Likely uses 1.9L 4 cylinder rods 400 horsepower maximum
337 302 4 0.03 351W 3.3 5.4 Offset grind crank to 3.3
342 302 4 0.03 351W 3.35 5.4 Offset grind crank to 3.350
342 302 4 0.03 351W 3.35 5.4 Offset grind crank to 3.35
347 302 4 0.03 351W 3.4 5.4 Offset grind crank to 3.400 / or use Summit SES-5-52-05-000 or Trick Flow crank TFS-55325360 with Summit SES-5-44-05-201 rod
357 302 4 0.03 351W 3.5 5.4
372 351W 4 0.03 351W 3.64 6.2 Offset grind crank to 3.640 / 600 horsepower maximum
375 351W 4 0.03 351W 3.68 6.125 Offset grind crank to 3.680 / Likely uses Chrysler 340/360 rods 575 horsepower maximum
377 351W 4 0.03 351W 3.7 6.2 Offset grind crank to 3.70 / 550 horsepower maximum
393 351W 4 0.03 400M 3.85 6.209 Offset grind crank to 3.850 / Will not require cylinder bore notching No mallory metal required for balancing Users Chrysler 340/360 rods.

[HLC]

that bonnet buldge/scoop looks sweet.

[AU1XLS]

Be prepared to do bonnet mods as well due to block height of the 351w compared to the 302w

[Sledgehammer]

Gotta love a bonnet scoop on an AU, they just set them off nicely.