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Assembling a 454

  
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Assembling a 454

 
franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/21/14
10:54 PM

Hi.. im new here.
i have a question.
im assemblying a BBC 454 with 0.30 over bore piston, they are Speed pro L2399NF forged pistons 9:1 compression ratio, with forged crankshaft and forged rod with stock lenght on 9.800" tall deck... and y put on there a pair of procomp aluminium heads with ferrea valves competition serie 2.250" intake and 1.880" exhaust. the intake runners are 320cc and the chambers 115cc. and my camshaft have 0.618" of lift in intake and exhaust with a duration of 288/294 int/exh. y spend some money on high volume oil pump, a new timing chain with adjustable timing set, i have my own degree cam kit to put on right time as the spect cam says... the intake manifold can be chosed between a dual plane mercruiser and a single plane edelbrok. both rectangular. and the carb is a holley 4160 second vacumm pump 750cfm...
What do you think about this combo of engine, how many horsepower can make aprox, is that enought that carb? i will use the engine on a boat. Confused thank you vry much for your help and comments. Grin  

shyrgfuh3 shyrgfuh3
New User | Posts: 48 | Joined: 01/14
Posted: 02/22/14
04:34 AM

you need a new compression calculator. with flat top pistons and .030 over bore, .016 deck height you get 8.0 compression.

i would get some 85 cc heads which will give you 10.0

if you leave your compression as is i would get a much smaller cam like around a comp xe268h.

that carb is fine due to your low compression.

if you have pro comp rocker studs they will probably break.


comp calculator

https://www.uempistons.com/index.php?main_page=calculators&type=comp&zenid=bf9842c3f2c445aed2cf37f4dafa1f57  

franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/22/14
06:53 AM

the piston doesnt flat top. they are dome of -13.80cc the compression of the engine with 0.020" deck clearance and 0.039" gasket thikness is 9.19:1 CR


Bore: 4.28 (diameter)  
Stroke:  4
Cylinder Head Volume:  115  
Effective Dome Volume:  -13.80
Use (-) for Dome and (+) for Dish.  
Deck Clearance:  0.020"
Compressed Gasket Thickness: 0.039"  
Number of Cylinders: 8
Compression Ratio : 9.19 : 1
Total Displacement (in.3) : 460.39
Total Displacement cc's : 7547.38  

shyrgfuh3 shyrgfuh3
New User | Posts: 48 | Joined: 01/14
Posted: 02/22/14
08:47 AM

ok, xlnt, well i might use a slightly bigger carb like a 770 or 780.  

Dave632 Dave632
Addict | Posts: 2220 | Joined: 07/08
Posted: 02/23/14
07:27 AM

Even going to an 850 would not be cause for alarm.
By the way a tall deck BB is a 10.2.
Other than that your combo sounds good. I used Ferrea valves in my race engines with good results, I used the Titanium ones and never had a failure. I cannot say the same about other cheaper brands. My HP guess would be in the 550-575 range. I would use the single plane intake unless you are planning a lot of low speed running.  
[[SUPPORT AMERICAN CARS, STOMP A RICE CAR TODAY.]]

tuffnuff tuffnuff
Moderator | Posts: 7827 | Joined: 12/09
Posted: 02/23/14
08:58 AM

+1 Dave
The 850 carb would be my choice with the cam/head combo, "Tall" block is 10.2".,. but I'm a little confused here because the L2399NF piston is for a 9.8" block where stock length 6.385" rods will work.,. however, "IF" the block is tall then a .400" longer rod is needed to match the L2399NF pistons.,. or tall block pistons.
Eagle has a 6.800" rod ESP-68003D ($449.97).,. this will raise the piston in the bore and reduce deck height by .015" it will also bump up compression a little.
Clarification is needed here from the poster.,. I peg output around 600+ horse, no problem with aluminum heads.

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

Dave632 Dave632
Addict | Posts: 2220 | Joined: 07/08
Posted: 02/23/14
03:28 PM

Yes Tuff,
I am always conservative with my HP guesses but that setup could hit 600 if all is well with it. If he has a tall deck and is using 9.8 pistons and rods that piston will sit way down in the hole at TDC.  
[[SUPPORT AMERICAN CARS, STOMP A RICE CAR TODAY.]]

tuffnuff tuffnuff
Moderator | Posts: 7827 | Joined: 12/09
Posted: 02/23/14
04:28 PM

Icon QuoteDave632:
Yes Tuff,
I am always conservative with my HP guesses but that setup could hit 600 if all is well with it. If he has a tall deck and is using 9.8 pistons and rods that piston will sit way down in the hole at TDC.


Yep, until the poster comes back with more info we can only keep guessing.,. and IF that slug is submerged in that cylinder, I won't even venture a guess at how low compression or HP will be.,. but pretty anemic.
Let's hope it's a 9.8" block.

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/27/14
06:51 PM

Hi again, im using a short block (9.800"tall deck) stock lenght rods, and i have a edelbrock rpm torker2 single plane renctangular port too and im going to use it, low rpm doesnt matter for me because im going to put that engine on a boat Smile Smile Smile im aproach 3500-4500 rpm range cruising range maybe a little less... mi carb is an 4160 holley manual choke, secundary vacumm. some mechanics near to me recomend me that is necesary secundary opens mechanic without vacumm for marine use and 850cfm at least... i can modify my carb to secondary opens mechanic without vacumm. but i dont know how to calculate witch yet (jets) must use to make 850cfm, because the diameter of the holes between a 750cfm and 850cfm are the same.
Thanks a lot for the opinions.  

franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/27/14
06:58 PM

Hi, im using Ferrea Competition Serie F6000, i used the same serie in other racing engines with excelents results, only had two failures in exhaust once in differents engines and that was because of poor gas mix and rocker stud failure in the other...  

franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/27/14
07:23 PM

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franciscog_12 franciscog_12
New User | Posts: 6 | Joined: 02/14
Posted: 02/27/14
07:23 PM

Icon Quotefranciscog_12:
Hi.. im new here.
i have a question.
im assemblying a BBC 454 with 0.30 over bore piston, they are Speed pro L2399NF forged pistons 9:1 compression ratio, with forged crankshaft and forged rod with stock lenght on 9.800" tall deck... and y put on there a pair of procomp aluminium heads with ferrea valves competition serie 2.250" intake and 1.880" exhaust. the intake runners are 320cc and the chambers 115cc. and my camshaft have 0.618" of lift in intake and exhaust with a duration of 288/294 int/exh. y spend some money on high volume oil pump, a new timing chain with adjustable timing set, i have my own degree cam kit to put on right time as the spect cam says... the intake manifold can be chosed between a dual plane mercruiser and a single plane edelbrok. both rectangular. and the carb is a holley 4160 second vacumm pump 750cfm...
What do you think about this combo of engine, how many horsepower can make aprox, is that enought that carb? i will use the engine on a boat. Confused thank you vry much for your help and comments. Grin


Photo

Photo

Photo

https://www.facebook.com/photo.php?fbid=10200892303710235&set=pcb.10200892306710310&type=1&theater


Some more photos on my facebook
https://www.facebook.com/franciscog12
Cool