toyota chinook motor upgrade/modification

[refried]

Nice Chinook, I always wanted to build one, my father had a couple in the 70s/80s and I thought they'd be great with 4wd. I put a Buick V6/T350 in my Toyota with a Downey kit 25+ years ago and have been very happy with the swap, never any problems with overheating and have only broken one rear in 300,000 miles (broken tooth). It's too bad Downey is gone, They had great kits, I built a smallblock Landcruiser with thier parts and liked the fit and customer service so much I built the pu. They even built me a free set of heavier motor mounts 10 or 15 years after my purchace because I kept breaking one.
If I was to build another pu I'd go with the 4.3 with an automatic, The Buick engine is smaller and fits beter but parts are getting scarce and expensive.

 

[ihatemybike]

I believe the GM 3.8L V6 engine can be adapted. They mated them to the 4L60E using a different bellhousing in the Camaro. Supercharge versions are common enough in the scrap yards.

http://en.wikipedia.org/wiki/Buick_V6_engine

 

[chuckd]

Well, it looks like the kits that I would need would be nearly $1000 from Advanced Adapters and I would feel the need to rebuild any kind of motor before installing it. So as nice as the V6 swap sounds I can't see putting around $3000 into it (including donor motor and misc. parts). I've done some research on a 20R head on a 22R motor and this may be the route I choose. Thanks everyone for your input, its good to know my options. Also thanks for the picture of the V6 fit into the engine bay, doesn't look as tight as I thought it might be.

 

[Toyotero]

I've done some research on a 20R head on a 22R motor and this may be the route I choose.

One option that would be pretty trick would be a 20R/22R hybrid with TBI if you could swing it. You'd get the flow of the 20R head, high compression of the hybrid and tune-ability, efficiency and power benefits of EFI fairly inexpensively, at least in $$ wise, tinker time would probably be high. :-/

http://forum.ih8mud.com/79-95-toyota-truck-tech/396742-project-20re-junkyard-fuel-injection-tbi.html

 

[chuckd]

That does sound appealing, however is there stock toyota equipment for the EFI setup that would bolt up to the 20R head?

 

[chuckd]

Thanks for the links, they were insightfull.

 

[blakeape]

If you want to stay toyota a 3.4 V6 is an option. You would have to swap in a V6 5spd from either a 3.4 or 3.0 V6. The R150 5spd behind the 3.0 would also have a passenger side drop t-case which you would need. I help a friend do a SAS, 3.4, R150 with pass side chain drive t-case swap into his 1986 22r, IFS, carbed, non power steering, basic single cab. Nothing too difficult, just took some time and $.

 

[theboonedockssaint]

If you want to stay toyota a 3.4 V6 is an option. You would have to swap in a V6 5spd from either a 3.4 or 3.0 V6. The R150 5spd behind the 3.0 would also have a passenger side drop t-case which you would need. I help a friend do a SAS, 3.4, R150 with pass side chain drive t-case swap into his 1986 22r, IFS, carbed, non power steering, basic single cab. Nothing too difficult, just took some time and $.

This sounds what I would like to do or find a Toyota truck with a diesel or maybe even a turbo four gas? Another thing I wanna look into is a gear venders over drive. I really like the idea of the Toyota v6 and they are everywhere now.

 

[Toyotero]

That does sound appealing, however is there stock toyota equipment for the EFI setup that would bolt up to the 20R head?

The issue is that the 22R and 20R intake ports are very different shapes
http://www.lcengineering.com/TechNotes/?techid=49

Once I saw a guy on a Celica forum cut up a 22RE and a 20R intake then tigged them together to make a 20RE (he had gotten the EFI from a 83-85 Celica 22RE also). He claimed that the 20R head/engine ran very well with EFI... much better than a 35 year old late 70s carb setup anyhow and more powerful than a 22RE. I read once that the 20R head flows close to LCEngineering's stage 5 22R head.