3 replies to this topic

[1972coronet]

I've always been fascinated by the GMC V6's (305/351c.i.d.) and the truly odd Twin-Six (702 c.i.d.) , and am wondering if anyone makes one or both of these neat looking engines in 25th scale .

 

I'd like to build the Tom Daniel's "S'Cool Bus" with a Twin-Six in-place of the kit's engines ; I'd like to add a couple of 6-71 blowers atop as well .

 

Also , if anyone's made their own 305/351 or 702 Twin-Six out of scratch materials or modified from an existing kits' engines , please feel free to post pics of them here .

[charlie8575]

The V6 was a cut-down 348, and I'd imagine the 351 was a cut-down 409, so you might be able to cobble up something using a spare W-Motor.

 

Charlie Larkin

[1972coronet]

The V6 was a cut-down 348, and I'd imagine the 351 was a cut-down 409, so you might be able to cobble up something using a spare W-Motor.

 

Charlie Larkin

Hmm ... sounds like a plan . I thought that those engines looked like chopped W-Engines , but had no idea that they were based upon the tooling of the 348 (ad seq.).

[Longbox55]

The V6 was a cut-down 348, and I'd imagine the 351 was a cut-down 409, so you might be able to cobble up something using a spare W-Motor.

 

Charlie Larkin

The GMC V6 shares no parts with the W engine. It was not a "cut down" 348 or 409. In fact, the V6 actually dwarfs the W engine, and even the Mark IV engine that came after it, being a few inches longer and taller, as well as weighing in at around the 800 pound mark, dry. The block is a 60 degree Y block, with a deep skirt at the bottom of the block, unlike the Chevrolet engine, which is a 90 degree block with no skirt. There V6 came in 305, 351, 401, and 478 ci displacements, plus the was a 637 cid V8 based on the same block in addition to the 702 cid V12. The 351 and 478 V6 and the 637 V8 blocks also saw use as Deisels, using the same block with different pistons, heads, and intakes.

Jolly Goodfellow's site is probably the best reference source for these engines. http://www.6066gmcguy.org/gmcv6a.htm