frank_ster Posted June 20, 2010 Share Posted June 20, 2010 (edited) So next week i will begin swaping in a 1987 buick 3.8L v6 in to my 05 legacy gt. I thought long and hard about this. Reasons being cost to build 600 hp subaru engine a lot ! at least 6 grand. specs of the 3.8 buick engine 230 ft lbs tq at 1900 rpm no boost 550 ft lbs tq 3800 rpm @19 lbs boost 3.5" stroke 3.8" bore cost of parts motor 200$ crank shaft and connecting in stock form good for 750 hp cost of race roller cam shaft 250$ 450$ for set of weisco pistons 200$ for set of cometic head gaskets Installation : the stock dbw throttle body from the legacy will be used, motor plate will be fabricated, and then mated to the 5eat with rwd/4wd conversion and automation direct plc will be used for full manual shifting. Mega squirt fuel management. 12 36# lb/hr injectors and factory buick ignition system. Fed by holset hx 35w turbo. Edited October 4, 2010 by frank_ster Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
stiwanabe Posted June 20, 2010 Share Posted June 20, 2010 interesting concept... Link to comment Share on other sites More sharing options...
TRSCobra Posted June 20, 2010 Share Posted June 20, 2010 I'm sure it's like 300lbs heavier though. Watch out understeer! Link to comment Share on other sites More sharing options...
frank_ster Posted June 20, 2010 Author Share Posted June 20, 2010 maybe 40 lbs heavier. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
TRSCobra Posted June 20, 2010 Share Posted June 20, 2010 How does an iron v6 weigh only 40lbs heavier than an all aluminum h4??? And you're probably gonna need a cowl induction hood to clear that taller engine. Link to comment Share on other sites More sharing options...
Vitamin_G Posted June 20, 2010 Share Posted June 20, 2010 6 grand would be cheap for a reliable 600HP Subaru! Link to comment Share on other sites More sharing options...
frank_ster Posted June 20, 2010 Author Share Posted June 20, 2010 it fits under the hood .. the h4 is pretty heavy compared to an all aluminum I4. Yes it will be heavier but i'm willing to make that sacrafice. witch is also easily over come by larger rear sway bar. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
quick4dr Posted June 20, 2010 Share Posted June 20, 2010 sick build idea. I had a 98 pontiac GTP with the supercharged 3.8l making 247whp and 28xwtq, ran a 13.3 great motor to build with. im sure using a zzp turbo kit on it, mated to a legacy body would call for real quick ride. Link to comment Share on other sites More sharing options...
scoobydoobie Posted June 20, 2010 Share Posted June 20, 2010 subscribe Link to comment Share on other sites More sharing options...
CwhillVT Posted June 20, 2010 Share Posted June 20, 2010 subscribed, this will be interesting. GL Link to comment Share on other sites More sharing options...
underpowerd Posted June 20, 2010 Share Posted June 20, 2010 i'm in; lots of pics plz. Link to comment Share on other sites More sharing options...
Chameleon Posted June 20, 2010 Share Posted June 20, 2010 subscribed....lots of pictures must be taken plz Link to comment Share on other sites More sharing options...
joeleodee Posted June 20, 2010 Share Posted June 20, 2010 This is definitely intriguing. I've always loved that powerplant. BTW, where did you find the parts at those prices? Link to comment Share on other sites More sharing options...
brilliant sleeper Posted June 20, 2010 Share Posted June 20, 2010 Never would of thought of a Buick motor going into a LGT. Wild concept. Definitely subscribed. Link to comment Share on other sites More sharing options...
busabusa Posted June 20, 2010 Share Posted June 20, 2010 GL with build Adventures in Turbomachinery Link to comment Share on other sites More sharing options...
Gire Posted June 20, 2010 Share Posted June 20, 2010 Damn. In for results. Sounds like a fun swap. Where in Canada are you?? Link to comment Share on other sites More sharing options...
Laverne Posted June 20, 2010 Share Posted June 20, 2010 in... GNX LGT... Sweet Link to comment Share on other sites More sharing options...
ehsnils Posted June 20, 2010 Share Posted June 20, 2010 Sounds like a challenge. Is it only engine swap or does the transmission go to? Link to comment Share on other sites More sharing options...
frank_ster Posted June 20, 2010 Author Share Posted June 20, 2010 i live in monttreal , i'm in washington state for busness not far from vancouver ! going to use the 5eat as described in the first post. I will also do my mod to make the tranny rear wheel drive. and with a flip of a switch 4wd. parts wise . summit racing. Parts for grand nationals have been around forever so they are easily availiable. this same engine ran 12.70 @ 117 mph in the 1/4 mile in my sunbird. in completely stock form now with a cam that has more than .300" valve lift (now .500") it should have a lot more breathing room. with this 3.8 and automatic it should be able to leave a stop light either buring off the back tires or click in the 4wd. the holset hx 35 is actually a small turbo for a 3.8 so it should be able to get up and go almost instantly. and mega squirt with anti lag should make 4wd burn outs easy to do. Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
frank_ster Posted June 20, 2010 Author Share Posted June 20, 2010 Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
ehsnils Posted June 20, 2010 Share Posted June 20, 2010 Any reason to abandon the AWD? A DCCD (or similar setup) seems to be more useful than a manually engaged 4WD. Link to comment Share on other sites More sharing options...
burnout8488 Posted June 20, 2010 Share Posted June 20, 2010 How do you plan on beefing up the transmission to handle all that torque? Or will you keep the boost at a safe level while keeping the transmission relatively stock? (Cooler, IPT VB, etc.) Link to comment Share on other sites More sharing options...
peteyjr Posted June 20, 2010 Share Posted June 20, 2010 Intrigued and Suscribed as well Link to comment Share on other sites More sharing options...
Bbc84 Posted June 20, 2010 Share Posted June 20, 2010 subscribed for results Link to comment Share on other sites More sharing options...
frank_ster Posted June 20, 2010 Author Share Posted June 20, 2010 tranny .. just going to go full pressure. if that is not enough raise the pressure Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
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