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stroker inline 6

79bonanza

79bonanza

1/2 ton status
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Mar 31, 2010
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Georgetown, Kentucky
i was thinking of getting away from the traditional sbc or bbc for my mud truck and going with a straight 6.

i was wondering if anyone has ever stroker out a staight 6 befor and did it make enought power for mudding or trail riding maybe a few burnouts haha
 
I've seen 4 barrel intakes and split headers for them. It would be great for a crawler. But not for a mudder, they don't like RPMs. Offenhauser is the old speed parts. Keep your eyes open at swap meets and junk yards.
 
IMO, the money spent is not worth it for the minimal power gain. A small block V8 is a much better bargain.
 
i know a small block would prolly make more power but i just want something diffrent from the small block and big block
 
forget about playing in the mud then....you need revs, and torque for mud and dune climbing, unless your turning 28" tires.
 
I've heard tails about old farmers who prefered the six banger over the V8 because they said they didn't have to worry as much about wheelspin in the field with their street tires. Inline sixes make good, controllable bottom end power, but all their action happens before 3,000 rpm. That's about where you want your power to start reaching its peak for mud bogging.
 
The no RPM thing is a myth I have a built 292 that will buzz 6500 all day long .

No one makes a stroker "kit" but you can have the crank offset ground . FYI the 292 is a 4" bore and 327 pistons are a direct replacement . Cams,Intakes,headers , ect can be bought from PAW and Clifford performance. I say build one and throw it in a Light little 1/2 ton stepside with a SM465/NP208 and have fun. 300hp on pump gas is totally doable with the right combo and you could always give it a 75 shot of giggle gas
 
Also they respond well to superchargers and turbo's I'd like to build another one with low-compression pistons and a turbo with a blow through carb and intercooler .

My grandpa and I built a 225 Slant six dodge for my 4x4 1/2 ton 85 dodge and it ripped would buzz to 7000 rpm and pulled strong , granted it wasn't a built V8 but it was way stronger than a stock 318 or 360 of the same vintage and it sounded way cooler
 
Sounds like a lot of trouble and money for an inline six. I guess it all has to do with cam profile and timing and such. The Chevy Trailblazer has an inline six and it can supposedly put out 270 hp at something like 5000 rpm, but can it actually rev out that high in a real world situation?
 
I do like the slant six. Was it a true inline six though? I know those Jeep guys swear by their 4.0L sixes too.
 
yes, they can . my 292 is in a 69 chevy C-10 and with the 4-speed it will rev out very well. Cam,Iduction,exhaust,and Ignition upgrades are really all you need. you can get crazy like I did with pop-up 327 pistons and balanced rotating assembly. its not much more money then building a 350
 
yellowK20 said:
yes, they can . my 292 is in a 69 chevy C-10 and with the 4-speed it will rev out very well. Cam,Iduction,exhaust,and Ignition upgrades are really all you need. you can get crazy life I did with pop-up 327 pistons and balanced rotating assembly its not much more money then building a 350
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Does swapping out the 292 pistons for the 327 help it rev quicker?

I've heard of a couple guys that will swap in 400 pistons ( not sure if Chev, pontiac whatever) into a 392 I.H. They said it helps acheive a quicker rev.

They did say something about the piston rings being closer, and i suppose it is a lighter piston. So it should help.
 
yeah the lighter pistons help, but mostly they "wont" rev because of the stock cam and induction wont let them breath
 
it has 315-70-15's on it in this picture. I put a 383 small block in the truck thinking it would be more fun but I spun a rod bearing at startup ( always double check your clearances) so the 292 got swung back over the core support

l_5d88cadcf7cba68efe9d33d1ea037381.jpg
 
My old 81 K5 Jimmy came with a straight 6 from the factory, but when I drove it back in high school, I wanted the big V8 sound and power. Later, I actually wished I had rebuilt the 6 and did some power mods on it. The 6 had far more torque from idle than the V8 ever did. That and everyone has a V8, but not many with the 6.

If your heart is set on a 6, get one and do some of the mods that yellowk20 is talking about, and keep it to a smaller tire so that you can rev it. But 6'es are much better for trail work and rock crawling duty than mud.
 
One local stock car racer ruled the tracks running 292 Chevy's in cars like old Volvo PV544's..they are hard to beat for low RPM torque...Clifford Research made 4 bbl manifolds and headers ,valve covers and other high performance parts for straight sixes..

The older I get,the more I like old straight sixes..last one I had was a lowly 250 "camel-humper" in my '79 Bonanza,I adapted a Edelbrock to its original 2 bbl integral intake,and ran it with the secondary barrels dissconnected..the thing surprised me,it actually went pretty good,had gobs of off idle torque..more than the 305 I replaced it with did,when its #6 piston decided to lose part of its crown,after years of spark knock from the crappy "Very-Junk" 2bbl carb running too lean,and the poor design of the integral head..
I had the same engine in my '81 G-10 van too,and decided to swap in a 307 V8 from a '73 Malibu--its slower than the six ever was,and sucks more gas down too..I regretted swapping it,it was a ton of work for nothing,really!..and both trucks were SO much easier to work on with the 6 too,especially the van!..:doah:

The 292's were not good on gas,but no worse than a 350..I just assume have a 292 than a V8..
 
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