racprops
OBS Enthusiast
The big question of a 1987 Chevy Tuned Port Intake VS an old fashion performer dual plane Intake with a Throttle Body Injection system on it by an adaptor.
The target power and RPM range is 1500 To 4500RPMs, with the main goal is as much torque as possible at 1500RPMs.
This will be on my special 383 engine which is built to have is low torque peek at 1500 to 2000RPMs, and thanks to Rhoads Roller Lifters also switch to the performance profile and have a second torque around 3800/3000RPMs.
So the question is which intake will give the most 1500 RPM Torque?? This range of 1500 to 2000RPMs is the range I am gearing my van to run at 75/85MPH, as in my cruse speed/RPMs.
The specs are:
The cam is #806 cam’s Specs; 207/214 @.050 117 440/454 lift with 1.6 full roller rockers (milder rockers)
I will be running Rhoads V-Max roller lifters, and with Rhoads Lifters running at 10% reduction cam will be at:
180/192 114 .396/408 at low RPMs
These are the cam specs of a low RPM cam, one that had it torque peek at 2000/2200 RPMs not 2800/3000RPMs, it came out of a 90 Cadillac Chevy 350 that was rated at the 2000/2200 Peek, much like the classic Chevy 400 and the Olds 403 did.
Yet at 2500/ 3500 will be running the full power cam.
This will give me a variable cam, mild at low RPMS and HOT at higher RPMs.
The heads are stock swill port 193s, ceramic coated for lean burn running.
The pistons are Keith Black “D” shaped crowns also ceramic coated, and Teflon coated skirts.
The rings are chrome molly with number two as a gapless ring.
The crank is old school 400 turned to fit a 350 Block, with stock 400 Rods.
Compression is calculated at 9.5+
Thanks for your input.
Rich
The target power and RPM range is 1500 To 4500RPMs, with the main goal is as much torque as possible at 1500RPMs.
This will be on my special 383 engine which is built to have is low torque peek at 1500 to 2000RPMs, and thanks to Rhoads Roller Lifters also switch to the performance profile and have a second torque around 3800/3000RPMs.
So the question is which intake will give the most 1500 RPM Torque?? This range of 1500 to 2000RPMs is the range I am gearing my van to run at 75/85MPH, as in my cruse speed/RPMs.
The specs are:
The cam is #806 cam’s Specs; 207/214 @.050 117 440/454 lift with 1.6 full roller rockers (milder rockers)
I will be running Rhoads V-Max roller lifters, and with Rhoads Lifters running at 10% reduction cam will be at:
180/192 114 .396/408 at low RPMs
These are the cam specs of a low RPM cam, one that had it torque peek at 2000/2200 RPMs not 2800/3000RPMs, it came out of a 90 Cadillac Chevy 350 that was rated at the 2000/2200 Peek, much like the classic Chevy 400 and the Olds 403 did.
Yet at 2500/ 3500 will be running the full power cam.
This will give me a variable cam, mild at low RPMS and HOT at higher RPMs.
The heads are stock swill port 193s, ceramic coated for lean burn running.
The pistons are Keith Black “D” shaped crowns also ceramic coated, and Teflon coated skirts.
The rings are chrome molly with number two as a gapless ring.
The crank is old school 400 turned to fit a 350 Block, with stock 400 Rods.
Compression is calculated at 9.5+
Thanks for your input.
Rich