Ford Windsor Forums

Hi all,

i'm currently building up a twin turbo'd 302w. So far i have AFR 185 heads, a good block to slide a yet to be decided bottom end into, and two turbo's from which the boost will be made. Now my question is what should i run for the bottom-end? I was thinking about a tryed and tested crane 2031 cam, Scat I - beams, Scat crank and a low comp piston, most probably an eagle. i want to keep comp to about 8.5 - 8.8, and let the turbo's make the power. I realise the issues with the webbing in the block, but at 6psi with a safe tune it should last some time.

I'm sure other people have had alot more experience than me with boosted windsors, so i'm extremely keen to tap into that. please tell us your thoughts on the issue guys.

cheers.

I've always heard that the 302 Ford had a stellar bottom end.  I've been told that the factory rotating assembly could handle 550 flywheel horse power.  I think Ford Racing only recommends 400 horsepower on the factory block.  In the July issue of Car Craft they built a 479 horsepower 302 that used the factory crank, fhttp://www.jegs.com/webapp/wcs/stores/servlet/category_10001_10002_104516_-1_10175actory rods, and a forged piston.  This motor made power up to 7000 RPM.

I am personally building a 400-450 horse 302, I used a factory crank, scat I beam rods with bushed pins, and speed-pro H273cp30 pitsons.  I am questionig running the cast piston under this much power though.  Personally I'd stick with a Speed-Pro forged piston, a scat rod, and a Ford Racing crank.. Ford Racing has a nodular iron crank for around $330 doolars, for the one peice rear main seal block.

 If you are worried about block stability check out these parts, you may want to hadd them in the equasion.  If you do get a main girdle, have the block line honed with the girdle on.

http://www.jegs.com/webapp/wcs/stores/servlet/category_10001_10002_104516_-1_10175

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1989 Firebird L03
1993 Thunderbird 5.0 HO
1995 F150

Gonna be building a 351 Boss this summer!
Summer's over, never got to it...
This is my current build though
http://www.302w.com/Forums/forums/thread/1100.aspx

Before you get too far into it, have a think about a 351 block. A 351 block should hold a couple of hundred hp over a 302 block.

 

Most 302 failures on TT setuis seem to be in the ballpark of 500-600 rwhp. The block generally splits down the valley through the cam bearings before much else lets go. 

 

With 6psi, would I be right in assuming youre aiming for 4-500rwhp? In that case you should be relatively safe.

thanks for the reply mate! I'm aware of the issues with the 302w block, but the problem with sourcing a EFI 351 engine for rebuild, is i live in Aus, meaning i have to source the block through the US, as no one stocks them here. Also the conversion with a 302 will be easier and most parts are relatively easy to source.

Yeh your right, the main aim is to just get this up and running and make good power while being reliable, giving me something to tinker with while i build a 331 DART windsor up, but i don't see this happening in the near future.

i want to make a pretty stout little windsor for now, i'll be using 2 x precision turbo's ( sc61's ). I was told that RPM + abuse are the real killers with the 302w blocks, so i'm hoping if set up properly, i shouldnt have too many issue's!

the bottom-end is a grey area atm, the AFR 185 heads are 58cc, so im looking for a piston with roughly 15cc dish. As this is pretty much a budget build, i'm trying to find the best parts for my money!

 

Ahh I'm in aus too so I know the sort of problems youre having then.

Lots of people run stock ish bottom ends with ARP bolts put through everything possible for that sort of TT build.

 

The other thing to add is that detonnation is a killer - make sure you run a wideband and a fat mix until its all tuned right. Better to be rich than lean. If you keep a conservative tune and a decent rpm limit you should be fairly safe to stick with a cheap bottom end and just rely on the turbos to make the power.

yeh thanks for the advice mate, if only i hadn't already thrown the rotating assembly away!  The block has been bored 0.030", decked, new cam bearings, core plugs and put through the hot wash, but i have afew questions regarding the block, i'll get some pic's up, which will give you a better understanding of what i mean, there is some corrosion to coolant/oil galleries which i'm not too sure about, and also some doubts with the cam bearings...

i'm most likely just being a pedantic ***, but in these photo's there is some corrosion around coolant/oil galleries, should i be alarmed, or what are your thoughts, thanks!

 

Looks ok to me. Just make sure you run proper coolant in it from now on.

 

If youre worried you might be able to get it sonic checked.

idk, maybe i need new glasses but that block looks great to me

 

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1989 Firebird L03
1993 Thunderbird 5.0 HO
1995 F150

Gonna be building a 351 Boss this summer!
Summer's over, never got to it...
This is my current build though
http://www.302w.com/Forums/forums/thread/1100.aspx

yeah thought i was just being fussy!

The turbo's may be sitting around for a while, would it be wise to oil them?!

I'm also chasing parts, as cheap as possible, i'm guessing summit racing and US ebay is the cheapest i'm going to get them. Currently chasing Crane 2031 cam and SCAT crank, if anyone's know's of a better seller, even second-hand.

cheers all, your all making this build alot easier for me!!

 

Oil certainly wont hurt them so I would.

Summit shipped via BAX global direct is pretty good. Ebay local might be an option.

Hi again guys,

 havent posted in here for a while,

 my twin turbo'd windsor is starting to come together, im just curious as to what sized wastegates i should run, will only be running 6 -7 psi for the moment, so they will have to be fairly large, i was considering 2 x 38mm turbosmart gates? or 2 x 44mm tial gates, can anyone give me some advice? cheers.

This guy seems to be planning to make 4-500 power with 38mm gates:

http://www.fordforums.com/f543/turbo-setup-help-please-83446/ 

Have you seen turbomustangs.com? They might have a bit of info over there too.
 

gentlement i doing a replace and buildup on a 5.0 fro my 93 f150 4x4 efi s-cab i found a pair of motors i intend to build from long b lock out   putting in a comp cam rv II cam lifter push rods and the like my question is block wise what do i have to look for to make sur the block will mate up to the heads intake and the like al ready in the truck. you input is really appreciated

hi, i am also in aus and am gathering bits for a tt 302w. I am a little worried bout the 500hp limit and am thinking of using an earlier block? Should i?. I have two r3/t4's, gt40p heads, 65lb injectors, 75mm t/b, ems ecu, explorer intake. I was going to get custom grind cam but read you are using a crane 2031??. is this a turbo cam?. i am also planning on using the stock crank, rods, pistons for now (decomp the heads) and build a stronger engine in the mean time.