|
Re: Low Deck 400 Combos....
[Re: Streetwize]
#1346858
12/18/12 08:05 PM
12/18/12 08:05 PM
|
Joined: Jan 2003
Posts: 19,363
Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
|
Oh criminy people are worried about rod ratios  Hear me know and listen to me later...You aint gonna find any power there brother  Just find an acceptable to YOU piston CD that will allow the ring pack you want to use for the power level you are after and get a rod that fits...Nuff said.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: Low Deck 400 Combos....
[Re: Al_Alguire]
#1346859
12/18/12 08:11 PM
12/18/12 08:11 PM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
I agree--Rod ratio is the most talked about least HP producing item in a modern engine today. I worked at a shop that did high end national winning circle track SBC's. Every other builder in the USA did 6 in minimum most did longer--BIG names I tell ya--we would get one in for a redo/ fresh up--dyno it--put our 5.7 rod combo in it and pick up a little--"Long rods are better" is a MYTH---yea I know about dwell etc ---build about a few decades worth of engines and you understand if the rod clears the cam and oil pan and keeps itself hooked to the crank and piston then thats all there is to it!!!!
|
|
|
Re: Low Deck 400 Combos....
[Re: Hutch]
#1346860
12/20/12 12:59 PM
12/20/12 12:59 PM
|
Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger
master
|
master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
|
Quote:
I have a bit of an odd ball combination but it is a low deck deal based on a 383 so I thought it would still fit the thread. 4.280 bore with a short piston , small dome netting approx 11:1 compression. 6.860 MP lightweight Oliver rods , lightened stock crank with a slight decrease in stroke to 3.360" . MP Stage 6 heads with a small port ,MP 2.14 , 1.81 valves (3/8" stem) , MP 590 solid camshaft, Edelbrock victor 440 manifold with .080 cut off each side to fit the heads properly and a old carb shop 850 carb. This deal is 385 cid and seems to like shifting around 7800 rpm.
Its in a 3100 lb car and has run a best of 9.86 at 135.60 in good air through header mufflers.
Many don't believe its basically a 383 but thats fine. Its very mild , behaves well and has proven to be a great bracket motor for the past 5 years. I have another one of these im going to start pieceing together but I will increase the stroke to 3.600 as the small motor is lacking slightly in the torque department.
Hutch
What kind of piston is that? specs?
Thanks Rem
|
|
|
Re: Low Deck 400 Combos....
[Re: RemCharger]
#1346862
12/21/12 04:11 AM
12/21/12 04:11 AM
|
Joined: Jan 2003
Posts: 296
Ontario Canada
Hutch
enthusiast
|
enthusiast
Joined: Jan 2003
Posts: 296
Ontario Canada
|
Quote:
Quote:
I have a bit of an odd ball combination but it is a low deck deal based on a 383 so I thought it would still fit the thread. 4.280 bore with a short piston , small dome netting approx 11:1 compression. 6.860 MP lightweight Oliver rods , lightened stock crank with a slight decrease in stroke to 3.360" . MP Stage 6 heads with a small port ,MP 2.14 , 1.81 valves (3/8" stem) , MP 590 solid camshaft, Edelbrock victor 440 manifold with .080 cut off each side to fit the heads properly and a old carb shop 850 carb. This deal is 385 cid and seems to like shifting around 7800 rpm.
Its in a 3100 lb car and has run a best of 9.86 at 135.60 in good air through header mufflers.
Many don't believe its basically a 383 but thats fine. Its very mild , behaves well and has proven to be a great bracket motor for the past 5 years. I have another one of these im going to start pieceing together but I will increase the stroke to 3.600 as the small motor is lacking slightly in the torque department.
Hutch
What kind of piston is that? specs?
Thanks Rem
Don't laugh too hard. I actually bought them from the friend of a mopar 383 lover who had passed away and left these pistons behind for his future project which never happened (he had the same idea as me I guess). They are Venolia pistons , .187" dome with valve reliefs , lightened in every possible way , .927 pins (very short but similar to todays lightweight honeycomb style pistons undercut below the oil rings for weight savings) and they were made in 1971!! They are very noisy as the running clearance is much higher than what is run with todays designs.
Hutch
|
|
|
Re: Low Deck 400 Combos....
[Re: 74yellowduster]
#1346867
03/02/13 12:44 AM
03/02/13 12:44 AM
|
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
dangina
pro stock
|
pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
|
Quote:
mine's kind of a newbie motor
400 .030 over KB240 flatop pistons. Eddie performer rpm kit - came with rpm heads, cam, rpm intake. HS 1.5 rockers, hv pump, holley 750 street carb, schumy headers. heads needed milling so the comp ratio is about 9.7:1 MSD 8386 dizzy (has a built in elec ign)
300/308 duration 238/246@.050 lift .480/.495
i'm curious what kind of hp/tq i'll get. it's waiting in line for the dyno
I'll make a guess at 425-450hp/torque? what do we get if we win? 
|
|
|
|
|
