building 383 stroker
Thread Starter
Instructor
Joined: Jan 2009
Posts: 193
Likes: 0
From: NJ
building 383 stroker
I am keeping my options open and need some help with what direction to go. I am currently thinking about rebuilding my motor once again and add on a blower but it may be more money than I can afford right now. So I was considering leaving my current set up and just adding a stroker kit. I am just curious how much HP I will gain and if its worth going this route? I am currently running Edelbrock performer RPM heads, cam (234/244 @.050 lift) and air gap manifold. 750 mighty demon carb, double strike ignition, full roller 1.5 rocker arms, 3000 stall. I would get a 383 stroker kit with 10.5-1 compression. How much HP will I gain roughly? I would also put a bigger cam in while the motor is apart if it would make a significant power difference.
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
HP = (torque X rpm) / 5252
In other words, at 5,252 rpm, torque equals HP. So, at that rpm, every 1 ft. lb. increase in torque equals 1 additional HP.
Racer
Joined: Jul 2006
Posts: 277
Likes: 0
From: Big Spring TX
I would say it would be a very nice bump in HP and TQ. Your limiting factors are those heads and that cam. Edelbrock heads have very poor flow numbers when compared to just about every other manufacturer out there.
Chevy High Performance Magazine
Intake Port Flow Test Results
Airflow Research 190/Brodix-8 Pro/Canfield Aluminum/HolleySysteMAX/GM LT4/Edelbrock
Performer*
.200 144 125 141 130 147 121
.300 208 177 201 184 197 174
.400 244 220 247 222 230 216
.500 262 254 258 242 250 235
.600 261 226 257 252 243 236
Chevy High Performance Magazine
Intake Port Flow Test Results
Airflow Research 190/Brodix-8 Pro/Canfield Aluminum/HolleySysteMAX/GM LT4/Edelbrock
Performer*
.200 144 125 141 130 147 121
.300 208 177 201 184 197 174
.400 244 220 247 222 230 216
.500 262 254 258 242 250 235
.600 261 226 257 252 243 236
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Assuming you are using the exact same cam, heads, etc...only change is cubic inches. 350 vs. 383 (My original post stated 10-20hp increase)
Displacement: 350 cu. in.
Carburetor: Holley 600 cfm
Heads: Air Flow Research 195cc Street
Intake: Air Flow Research FloPower RPM
Camshaft: Air Flow Research hydraulic, with 218/223° of duration @ 0.050 in. lift, and 0.460/0.470 in. lift
Headers: 1 5/8 in.
Comp. Ratio: 9.0:1
MAX HP: 420 @ 5000
MAX Torque: 435 @ 3800
Displacement: 383 cu. in.
Carburetor: Holley 600 cfm
Heads: Air Flow Research 195cc Street
Intake: Air Flow Research FloPower RPM
Camshaft: Air Flow Research hydraulic, with 218/223° of duration @ 0.050 in. lift, and 0.460/0.470 in. lift
Headers: 1 5/8 in.
Comp. Ratio: 9.0:1
MAX HP: 440 @ 5000
MAX Torque: 470 @ 3500
http://www.ryanscarpage.50megs.com/combos2.html
Last edited by LFZ; Sep 29, 2009 at 04:54 PM.
