Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
09-26-2010, 09:51 PM | #1 |
Registered User
Join Date: Dec 2008
Location: Ashland, KY
Posts: 700
|
engine build questions?
the motor that im going to be building for my 68 long bed. the truck has a th400 and 3.73 posi. im going to be switching to a 700r4 within a year tho. im really wanting 400 hp and a motor that i can drive everyday. ive asked a ton of questions about this so far and thanks for all the help this far.
heres what i have decided on 400 sbc .030 over stock rod lenght flat top pistons with 4 1cc relief valves cam Dur @ .050 214/214 Lift .442/.442 intake performer EPS Heads Edelbrock 64 cc E-Street Roller rockers 650 Cfm Holley DP so i have three questions 1. does this motor sound like it will acheive what i want from it? 2. would i get better power/economy from a set of GMPP Vortec heads 3. am i wasting my time using the stock lenght rods? thanks for taking the time with ALL MY QUESTIONS i have had about building this motor lol
__________________
68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD |
09-26-2010, 10:22 PM | #2 |
Registered User
Join Date: Dec 2009
Location: Arlington, WA
Posts: 16
|
Re: engine build questions?
Looks like a fun combo. I run a 406 myself.
A sbc with 4.155 bore, 3.75 stroke, 64cc head chamber, 4.1cc flat top pistons, and I am guessing .020 deck hight would have around 11.2 static compression. You will need a much larger cam, or larger cc heads. My .02 |
09-26-2010, 11:14 PM | #3 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
|
Re: engine build questions?
I think you're going to have too much compression with that combo to run on pump gas. I would go with a piston with a small dish, and a bit bigger cam. A 406 can utilize a fairly good sized cam. With that small cam you're leaving a good bit of power on the table.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
09-26-2010, 11:24 PM | #4 |
Registered User
Join Date: Dec 2008
Location: Ashland, KY
Posts: 700
|
Re: engine build questions?
how big would i be able to go without losing ability to double as a daily driver?
__________________
68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD |
09-26-2010, 11:34 PM | #5 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
|
Re: engine build questions?
I have used this cam in a 406 with stock dished pistons, Vortec heads, and the typical intake, carb, ignition, and made very respectable power, and it could have easily been a DD.
http://www.summitracing.com/parts/CCA-12-239-3/
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
09-27-2010, 11:21 AM | #6 |
Registered User
Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
|
Re: engine build questions?
I built a 406 for my blazer years ago. It has an Isky 270 mega cam. The duration at .050 is 221. With this cam, 10.0 compression, pocket ported 487 heads, and a performer intake, it had awsome low end torque, and was pretty much all over with after 5000 rpm. Perfect for a mild daily driver type application. As general rule, the cam usage descriptions are based on a 350. Pick the rpm and usage you need, and go one size bigger for the 400.
For your 400hp goal, I think you'll need more cam than you have picked. I wouldn't worry too much about the rods in such a mild application.
__________________
Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
09-27-2010, 03:44 PM | #7 |
Badass
Join Date: Jan 2009
Location: lox. fl
Posts: 4,586
|
Re: engine build questions?
im going to be watching this. i have a 400 stock bore about to go in my 84 in a few weeks. maybe going to a 406 alum heads in a year or so.
but dont you think a 650cfm carb is to small? for what your looking for
__________________
Think outside the box? -84c10 (1stcar)→My Build← -00 Saturn 5spd drop a gear and disappear! 1/4:13:90 |
09-27-2010, 04:41 PM | #8 |
Registered User
Join Date: Dec 2008
Location: Ashland, KY
Posts: 700
|
Re: engine build questions?
honestly i jus want dependability! i said 400hp before but if i could get between 350 and 400 i would be pumped but would settle for less as long as its still a strong motor! I plan to drive this truck to death and then rebuild it again lol! ive decided on the 70cc combustion chamber Estreet heads to give me a better compression ratio for pump gas and seriously considering the cam Captainfab suggested
__________________
68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|