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#26 | |
Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: Small block 400 build up...anyone running that setup?
Quote:
For your machine work ask the shop to put deck plugs in. Strengthens the bores. I also recommend going to a 6" rod instead of the stock 5.5" It gives the pistons better rod angularity. (less cylinder wear) Being a 406 you are going to need intake runner volume around 220cc for all around performance. If you do a lot of street Driving I recommend Drilling the steam holes unless they come drilled all ready. I also recommend a 3000 stall speed. The 2500 or stock is going to be to tight and can knock the thrust out of your crank. These are the # of my 406 @ 35 deg of timing. It also gets a cool 9.5 MPG. |
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#27 |
Registered User
![]() Join Date: Jan 2008
Location: St.Petersburg,Fl
Posts: 1,267
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Re: Small block 400 build up...anyone running that setup?
My 406 is a two bolt with splayed 4 bolt mains, I plugged the steam holes in the block and zero decked it.I run thermal coated SRP flat top pistons, 5.7 rods,coated combustion chambers,Comp cams X-treme mechanical roller,Jesel shaft rockers,Edelbrock Victor jr.heads, Bowtie intake,Chuck Gulledge Holley reworked to 830cfm.I also run a crank scraper,windage tray,and lifter valley baffle. I haven't got the truck finished but it seems to make sick power on test runs in front of the shop.I'm guessing 560h.p. or so. My last 406 also had the steam holes plugged,with no problems whatsoever. I had sprayed probably 15 bottles of NOS at a 150 shotat the strip,drove it to Tennessee 3 times,and it was my only driver.It never failed.These are the only small blocks I'll ever own,unless we go 427 or 434 in the future.
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#28 |
Registered User
Join Date: Mar 2001
Location: Paradise TX USA
Posts: 1,200
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Re: Small block 400 build up...anyone running that setup?
I have a 400SB that I built about 15 years ago, still running in my 69 GMC. Since these engines were pretty strong in stock form, I built it to be a daily driver, not a race engine. All I did was clean up the bores with a .020 overbore, put in dished pistons and ported the stock heads. I used a Crane 260 cam and topped it off with an edlebrock performer intake and 1406 Carb.
Its a great engine with loads of torque, runs fine on 87 octane, never had any overheating problems, and still gets decent mileage (12-14 hwy) when I can keep my foot out of it. I'd highly recommend this engine.
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"Negative people always seem to have a problem for every solution" |
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#29 | |
Senior Member
![]() Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
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Re: Small block 400 build up...anyone running that setup?
Quote:
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#30 | |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: Small block 400 build up...anyone running that setup?
Quote:
Thank you!!!!!
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#31 |
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: Small block 400 build up...anyone running that setup?
What do you anticipate for the compression ratio w/ the Vortec heads? Those larger 400sbc bores w/ the small 64cc iron heads will likely require you to run 93 octane to keep out knock w/ stock pistons.
Anyone have an any experience with this?
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85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! ![]() 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! ![]() |
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#32 | |
Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: Small block 400 build up...anyone running that setup?
Quote:
The v- tec head combo is slick. runs hard. |
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#33 |
high-Tech Red Neck
Join Date: Feb 2008
Location: Livingston, MT/On my boat WA/BC/AK
Posts: 2,294
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Re: Small block 400 build up...anyone running that setup?
If you build a 400 small block, this has been my experince...
DON'T EVEN DAYDREAM OF PULLING ANYTHING WITH IT!!! I had a 78 Blazer, rebuilt the 400, 4 bolt main, ran great, had good power. was bored +.030, Went against the machinists advice, hooked it up to a trailer to tow a 65 impala about 45 miles. By the time got home I needed a new engine. It got way too hot and cooked its self. Started smoking and using all kinds of oil.
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"He used to be a pretty nice feller, now he's a welder!" |
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#34 | |
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: Small block 400 build up...anyone running that setup?
Quote:
Your final gear ratio & tire size have a lot to do with towing capacity. If you have 3.08 gears & 35" tires, don't plan on towing much. You'll end up lugging the engine & may end up w/ some preignition.
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85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! ![]() 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! ![]() |
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#35 |
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: Small block 400 build up...anyone running that setup?
What's the minimum octane rating? Would 93 octane even cut it?
__________________
85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! ![]() 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! ![]() |
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#36 | |
Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: Small block 400 build up...anyone running that setup?
Quote:
A 400 needs a good pump clean radiator and make sure you purge all the AIR out. AIR = steam in a water system. |
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#37 |
Mean Green
Join Date: Sep 2007
Location: Portland, OR
Posts: 522
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Re: Small block 400 build up...anyone running that setup?
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#38 |
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: Small block 400 build up...anyone running that setup?
Steam trapped in the system can definately give you a fun time. I've found it helpful to put a small hole in the thermostat just in case.
__________________
85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! ![]() 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! ![]() |
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#39 |
Registered User
Join Date: Dec 2008
Location: Calumet Oklahoma
Posts: 3
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Re: Small block 400 build up...anyone running that setup?
Ive built several stock cranks will work fine with spot on machine work. If you ran a fast but streetable use aftermarket all heads (pro comps on ebay for 699.00 and hydraulic cam around 240 duration and low 500 lift with performer rpm or victor jr 1 3/4 headers and 10 - 10.8 to 1 compresion. Iused a voodoo lunati cam on last engine with these heads and dyno'd at 436 hp and 458 ft lbs with 750 carb
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#40 | |
high-Tech Red Neck
Join Date: Feb 2008
Location: Livingston, MT/On my boat WA/BC/AK
Posts: 2,294
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Re: Small block 400 build up...anyone running that setup?
Quote:
The load was a 65 Impala that weighed about 4500 lbs, and the trailer was probably another 1200 lbs. It was a warm day, I pulled the trailer from Prey Mt to Bozeman, Mt over the Bozeman Pass, it was about 85 degrees outside. I never had an overheating problem before I towed the trailer. The engine ran good and made great power.
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"He used to be a pretty nice feller, now he's a welder!" |
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#41 |
Registered User
Join Date: Sep 2007
Location: Emporium,Pa
Posts: 248
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Re: Small block 400 build up...anyone running that setup?
Throw my 2 cents in:
400 SB 2-bolt main block bored .030 over S.C.A.T Crank, Stock Stroke Melling M-55 Standard volume/Standard Pressure oil pump w/pickup 5.7 rods with ARP Waveloc rod bolts. Full Floating ARP Main bolts Speed Pro Flat Top Hyperutectic pistons with teflon coated skirts 350 Truck heads (76 cc chambers if I am thinking right having the steam holes drilled and new springs and oil seals put in) Right now Im looking for a oil pan that will work with the crossmember in my 71 and the Melling pickup and trying to figure out whats up with my cam bearings.
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"When you were born, you cried and the world rejoiced. Live your life so that when you die, the world cries and you rejoice." [Cherokee saying] 2001 Dodge Ram Sport 1500 4x4. (old ride) 1987 GMC V1500 Sierra Classic ("new" ride) |
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