Finally finished My 406

[paulrowe]

Hey guys it's been a long while since I last posted but I'm finally getting motivated to get my motor and transmission swapped. Going to run a TH400 and a 205. Anyway thought I'd post some pics of my engine build. Just took the NP203 out today! Man that things a pig! Pulling the engine and transmission tomorrow.

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[GXPWeasel]

Nice and clean!
Can't wait to see it in the truck.

 

[89Suburban]

Love the color, should help brighten up the engine compartment.

 

[Overland Suburban]

Looks good! Is a 406 a 400 bored 30 over? I know probably a stupid question but I'm just learning all this chevy stuff

Tracy

 

[RoryH19]

Nice, that engine, trans and t-case will be a beast.
Cool engine color, what is it called?

 

[legopnuematic]

1st I must say, thanks for sticking with the stock themed corporate blue, its such a nice color choice. Second, I dig the painted valve covers, not really much of a fan of chrome covers as they always rust and look tacky.

 

[legopnuematic]

Looks good! Is a 406 a 400 bored 30 over? I know probably a stupid question but I'm just learning all this chevy stuff

Tracy

Yes and a 60 over 400 would be a 412

 

[Overland Suburban]

Yes and a 60 over 400 would be a 412

Thanks! Is there a thread where you cover the components you put in that sweet looking engine?

I had a friend who is an engine builder who built a 400 for his 68 long box chevy 3/4 ton with 36" tires. Believe it or not we averaged 17 mpg on road trips. He used the edelbrock performer camshaft

Tracy

 

[AuroraGirl]

Long ago in the 90s, my plow truck was equipped with a detuned midwest modified race car engine. Most guys round here like to run SBC and 351 fords(ford small blocks???) as they ban big blocks in competition. My gpa built engines for guys back in the day and when he had an extra at one point, when the truck started running real bad he tuned the engine to run on regular gasoline(race gas and huge compression ratios) and apparently was hauling over 350hp on cheap pump gas. He eventually sold that engine, which was a 400 bored over to 406. Im very upset and wish I were alive in the 90s to have stopped him. I want that engine in my truck

 

[paulrowe]

Thanks guys! My build consists of stock rods and bottom end ground .010/.010 and internally balanced with ARP rod bolts. Dart 165 SS heads with 76cc chambers. Pistons are 12cc dish. It works out to be 9.2:1 compression. Cam is a COMP xtreme 4x4. It's the smallest one they have. .432 intake .452 exhaust basic operating range 600 to 4600 rpm. This is a torque experiment, hope it works out lol! Comp roller tip rockers, Edelbrock Performer intake and the trusty old Rochester.

 

[paulrowe]

I'll let you know the Dyno results later on!

 

[paulrowe]

Well the results are in! I made 352hp and 452ftlbs. Torque was all in before 2900 rpm. Kind of wish I went with a little bigger cam now but that's what I got so I'm happy. That torque should get the old girl moving anyway.

 

[Doppleganger]

My favorite motor. If I had stupid $ I'd have one with a roller cam.

Nice.

 

[Rusty Nail]

350 horse 450 tq?
Dude, nice freaking job.

I bet you will likr it very,very much.
Ensuring even lift across all valves with simple aftermarket rockers PLUS running "the smallest 4x4 cam" ?
Win. City.
She'll run AWESOME!

 

[paulrowe]

Thanks Rusty! So how do you think it'll pull with the 3.08 gears? Was hoping the torque might help make up for them?