just want some reassurance on combo choices

Quick update, block deburred, boref, zero decked, intake valley screens and magnets in. Rotating assembly balanced, checking bearing clearances now. Still have to file rings, decide on cam. Heads deburred. Cleaned up a bit in the Chambers and runners, nothing extreme. Fixed jagged spark plug threads. Aquired another blow proof bellhousing. Need to make final decision on cam..... Have one more potential. It's a custom grind a neighbor has. Hydraulic roller. What's the chances of getting a Dyno run with it? Brian, John, grumpy, Rick, what's your thoughts. I'm ready to get this together. I have been out of commission for the last month. Thanks guys, hope everyone is doing well. It will be with 1.6 Harland sharp roller rockers. I am even kicking the idea of EFI on this build, which is a whole other conversation.
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Christopher Williams said:
Quick update, block deburred, boref, zero decked, intake valley screens and magnets in. Rotating assembly balanced, checking bearing clearances now. Still have to file rings, decide on cam. Heads deburred. Cleaned up a bit in the Chambers and runners, nothing extreme. Fixed jagged spark plug threads. Aquired another blow proof bellhousing. Need to make final decision on cam..... Have one more potential. It's a custom grind a neighbor has. Hydraulic roller. What's the chances of getting a Dyno run with it? Brian, John, grumpy, Rick, what's your thoughts. I'm ready to get this together. I have been out of commission for the last month. Thanks guys, hope everyone is doing well. It will be with 1.6 Harland sharp roller rockers. I am even kicking the idea of EFI on this build, which is a whole other conversation.
20180.jpg
Click to expand...
I learned a while back not to guess or assume with unknown cam profiles.
Have to run an engine simulation to give a Just Answer for you.
Be tonight.
Working on my 87 Corvette now.
 
Christopher Williams said:
Quick update, block deburred, boref, zero decked, intake valley screens and magnets in. Rotating assembly balanced, checking bearing clearances now. Still have to file rings, decide on cam. Heads deburred. Cleaned up a bit in the Chambers and runners, nothing extreme. Fixed jagged spark plug threads. Aquired another blow proof bellhousing. Need to make final decision on cam..... Have one more potential. It's a custom grind a neighbor has. Hydraulic roller. What's the chances of getting a Dyno run with it? Brian, John, grumpy, Rick, what's your thoughts. I'm ready to get this together. I have been out of commission for the last month. Thanks guys, hope everyone is doing well. It will be with 1.6 Harland sharp roller rockers. I am even kicking the idea of EFI on this build, which is a whole other conversation.
20180.jpg
Click to expand...
Ready to get started.
Any Idea who makes this cam ?
The Lobes appear aggressive.
I am judging by the listed Max Open spring pressure listed at 400 lbs.
Up there for a Hydraulic Roller Cam SBC
 
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Its a Good Cam for a Heavy car or truck.
Entry level race cam, like mild bracket racing.
Probably do good with 3.23-3.42 gears and a 26.0-27.0 inch tall rear tire.
 
Maniacmechanic1 said:
Ready to get started.
Any Idea who makes this cam ?
The Lobes appear aggressive.
I am judging by the listed Max Open spring pressure listed at 400 lbs.
Up there for a Hydraulic Roller Cam SBC
Click to expand...
It's a Straub cam a guy I know had ground for a set of profilers he didn't use. It makes a pretty good broad torque spread. Not too shabby. He was planning to run it with an Edelbrock pro Flo 4 set up but went LS
 
Christopher Williams said:
Impressive torque with that single plane. That would be a stump puller down low.
Click to expand...
I have been following Chris Straub on Facebook all year Long.
He is an excellent cylinder head porter.
Like most Pros he leaves out key details.
Shows you what he wants you to know.

Its a Stump puller cam the last by him custom grind.

I do not consider it a Race Cam to Win.

Everyone has their own opinion.

I formulate my own from my own experience.
Along with what i have learned here on Grumpys.

Do another Simulation with the custom grind with 1.6 rockers & 1000 cfm Pro Flow EFI TBI.
 
B3qE2pn.png
omaDbE6.png


400 SBC.
10.5:1 static compression.
Isky 272/282 RR roller hyd. cam with 1.5 Rockers.
Small Tube Open headers.
Single plane intake.
1000 cfm EFI Throttle body injection.

Notice Volumetric efficiency is over 100 % from 5500 -7000 rpm.

Torque is lower down low to help hookup on street tires or drag radials as not to blow them off.
If you can not hookup you lost the race instant.
Other guy passes by easy.
You need 200-700 HP more now than baseline you had to catch up.
Time distance is the 1/4 mile race on the street or dragstip.

Horsepower is Superior to custom Straub cam.

Isky RR272/282 has 559 HP @ 6500 RPM.
 
Straub cam would be nice with higher gear ratio. The isky would really shine with a higher ratio using rpm to win race. Rpm make hp. It really comes down to what you want from your combo. Street vs. Race. Where you want to plant your power also. Matching a setup properly goes farther then looking max numbers most of the times.
 
Strictly Attitude said:
Straub cam would be nice with higher gear ratio. The isky would really shine with a higher ratio using rpm to win race. Rpm make hp. It really comes down to what you want from your combo. Street vs. Race. Where you want to plant your power also. Matching a setup properly goes farther then looking max numbers most of the times.
Click to expand...
I agree, the car currently has 3.42s, and that high 2.20:1 ratio first gear that can be a pain in the butt if you don't have lower gears or some power to get it rolling. It's not terrible if you ride the clutch and use it as a stall. But it will put some hot spots on the flywheel in traffic.
 
Maniacmechanic1 said:
B3qE2pn.png
omaDbE6.png


400 SBC.
10.5:1 static compression.
Isky 272/282 RR roller hyd. cam with 1.5 Rockers.
Small Tube Open headers.
Single plane intake.
1000 cfm EFI Throttle body injection.

Notice Volumetric efficiency is over 100 % from 5500 -7000 rpm.

Torque is lower down low to help hookup on street tires or drag radials as not to blow them off.
If you can not hookup you lost the race instant.
Other guy passes by easy.
You need 200-700 HP more now than baseline you had to catch up.
Time distance is the 1/4 mile race on the street or dragstip.

Horsepower is Superior to custom Straub cam.

Isky RR272/282 has 559 HP @ 6500 RPM.
Click to expand...
I have some choices to make. Those are both interesting shafts and two different animals. I think I would float the valves before I get to reap all the HP from the isky. I suppose I could install it a few degrees advanced. I don't have plans for a rev kit, but if I consider the isky I will consider a rev kit. I definitely don't want to have things come apart from floating them. Thanks for crunching numbers. I do appreciate it as always
 
Maniacmechanic1 said:
I have been following Chris Straub on Facebook all year Long.
He is an excellent cylinder head porter.
Like most Pros he leaves out key details.
Shows you what he wants you to know.

Its a Stump puller cam the last by him custom grind.

I do not consider it a Race Cam to Win.

Everyone has their own opinion.

I formulate my own from my own experience.
Along with what i have learned here on Grumpys.

Do another Simulation with the custom grind with 1.6 rockers & 1000 cfm Pro Flow EFI TBI.
Click to expand...
You are correct about the details. It's the small things
 
brian, without changing ANYTHING , different other than the cam used in the software dyno,
please run the same software dyno you used above
with the,
crane 119661 and 119651 cams and CROWER 00471 cam
as comparing those on an equal basis should be educational
crane119661.png

crower00471.jpg

crower00471.png


crane119651.jpg
 
Grumpy said:
brian, without changing ANYTHING , different other than the cam used in the software dyno,
please run the same software dyno you used above
with the,
crane 119661 and 119651 cams and CROWER 00471 cam
as comparing those on an equal basis should be educational
crane119661.png

crower00471.jpg

crower00471.png


crane119651.jpg
Click to expand...
I will after work Grumpy.
 
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