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Buick/Rover stroker

  
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Buick/Rover stroker

 
NixVegaGT NixVegaGT
New User | Posts: 10 | Joined: 01/09
Posted: 01/27/09
12:14 PM

Just for the fun of it, I figured I'd write down the details of my Buick/Rover stroker engine:

Late Rover cross-bolted block align-honed +22 thou for Buick 300 main bearings. Rear main modified for Buick 300 labyrinthine rear seal. Sleeved with top-hat liners and bored to 3.74".

Buick 300 crank (3.4" stroke) 2.5" mains.

Chevy pink rods from early 302, big ends narrowed by 100 thou. The small end bored out for Ford 0.9122 pin. Deburred/polished beams.

Ford 255 pistons, 40 over (3.74").

Buick 300 heads: Buick Stage II turbo v6 valves. Comp cams beehives and retainers (105 lbs closed, 293 lbs. open). A little pocket work with smoothed transitions. Triple angle with backcut.

Custom Erson cam: 108º LCA, 286/294 adv dur., 0.544" lift (@1.6), timing: 35/71/75/39. Used with Rover cam retainer plate. TA performance lifters with oil holes for the cam lobes.

Harland Sharpe adj. roller rockers (1.6) with new shafts, D&D fabrications rocker shaft gussets.

Late Buick V6 front cover with high volume pump. Pretty much just a kit with longer gears and a plate. The cover is pretty lightly used. Nice part.

Harcort single plane, Pro-form 650 race bodied E85 carb with billet metering blocks. Custom fabricated headers, 32" long, 1 5/8" primaries and 2 1/2" collectors. 4 into 1.

All in all I end up with almost 300 cid, (3.74"x 3.4"), Static CR: 11.8:1ish. I'm assembling it in the next month. Then it's off to the dyno. I'm interested to see how it turns out. FUN!

Anybody else building one of these?  
-Nic '73 Vega GT, Aluminum Wildcat 5.0

oldsfreak-#002 oldsfreak-#002
User | Posts: 218 | Joined: 03/09
Posted: 08/04/09
05:43 PM

if I may ask, how do you narrow the big end of a connecting by .100", i know you cut the mating surfaces, by cutting off .100" total the top and bottom of the housing would be correct but what about the parting lines,  they would still be huge,  unless you would cut the crap out of it and have them bored i guess, honing wouldnt do it right away,  SBC small journal rods would have been a better choice on that one I think  
"Racing isnt a hobby, its a way of life"

TheSilverBuick TheSilverBuick
Guru | Posts: 1227 | Joined: 02/06
Posted: 08/05/09
12:28 PM

This project sounds awesome!  I think by narrowing he meant he narrowed the rod itself, not the diameter, but actual thickness of the rod.  
-
The Silver Buick- '77 Skylark coupe w/ a Fuel Injected Buick 455&TKO-600, '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428&C6. '69 Firebird replaced!

http://www.bangshift.com/forum/index.php?topic=6189.0

oldsfreak-#002 oldsfreak-#002
User | Posts: 218 | Joined: 03/09
Posted: 08/05/09
08:02 PM

gotch ya,  gotta do all you can for clearance  
"Racing isnt a hobby, its a way of life"