400ci small block fuellie heads which cams should be used

Mark Bradley said:
I don’t thing his original question has been addressed and neither has he stated what the intention of the motor is.
The victor jr is an open plenum 3500-7500 RPM manifold
The torquer 2 is also an open plenum but intended for a lower RPM ranch 2500-6500.
Both of them would be a hot mess of goo on a mild motor that can not put out the RPM.
My 2¢ is you should find a factory dual plenum intake and use the lower RPM it gives to.

Cheers
Click to expand...

We have an original corvette inlet of the 60' s as well.
We are getting a camshaft first.
Now it seems the compression is too low ( we will need new pistons)

A
 
Captain's log:

Spend all day measuring...
Only to find that we have 8.5 to 1 compression .
Deck heigth of the dished pistons is way to low.
So now we need pistons that fill the void.
In theory this will raise the compression to 10.3 to 1.

More to come
 
Indycars said:
If you want to have a software simulation to compare with the dyno, I will need the following. A few
things I can guesstimate and I will give you those details if I do.

DynoSim5 Input Variables

CID Or Bore & Stroke
Rod Length
Heads with flow numbers
Valve Sizes
Intake Manifold Model
Carburetor Size or EFI
SCR
Header Tube Diameter
Cam Card
Cam Installed per Cam Card, or Retarded or Advanced
Rocker Ratio

http://www.proracingsim.com/dynosimmainpage.htm
Click to expand...
Do you sell this software ?
Can I get graphs out of it? We could use it on other engines too.
I would need to know if we can compare cams ( in and out) and set the difference out in a graph.
Thanks in advance
Arjen
 
http://www.proracingsim.com/desktopdyno.htm
https://www.jegs.com/i/Comp-Cams/24...MIovazxJbx2gIVAdvACh24Kgx2EAYYASABEgJyPfD_BwE


https://www.amazon.com/Competition-Cams-186011-Racing-Software/dp/B003HGFQGC

a logical progression and a few thoughts

I constantly get people posting about the mistakes they made or less than ideal choices in component selection they made. in most cases if you ask them several questions you'll rapidly find they either just started out modifying the car they owned without giving the project much thought as to...
garage.grumpysperformance.com
this is a good value for the price
 
Last edited:
Arjen said:
Do you sell this software ?
Can I get graphs out of it? We could use it on other engines too.
I would need to know if we can compare cams ( in and out) and set the difference out in a graph.
Thanks in advance
Arjen
Click to expand...

I'm using DynoSim5 by Motion Software and it cost $100.

http://www.proracingsim.com/dynosimmainpage.htm
http://www.proracingsim.com/purchasejac2.htm

Yes you can overlay up to 4 graphs on the same grid. All the text on the graphs I did with PhotoShop, but
you could do the same thing with PaintNet and it's free.

Below I was comparing three different cam timings for my engine in the TBucket.

CamTimingComparison.jpg

Another simulation I did for another member here on the forum comparing two different cams.

Engine_HowardsVsCrane_01.JPG

.
 
Arjen said:
Thx

So switch is the best software to buy today ?
Click to expand...
There is no right answer for this question. It depends on your budget and how willing you are to
find the input data. The more expensive software has a lot of inputs that you may not have immediately
and will take time and tools to get there.
 
Pipe Max not needed for street engine caliber builds.

For High end Ultra High Output Race Engines pushed to the edge.
 
hello everyone,

based on the cam that grumphy gave us we have come up with this mingle of bits: ( my students did this )

"camshaft edelbrock performer RPM 7102

valvesprings comp cams 982-1

Pistons speed pro hypereutectic H601P30

pistonrings R1037430

conrods Eagle H beam 5565B3D

oil pump Summit Racing® Oil Pump and Pickup Kits SES-3-60-08-001"

do you think this will work ?
any help is greatly appreceated!
 
Arjen said:
hello everyone,

based on the cam that grumphy gave us we have come up with this mingle of bits: ( my students did this )

"camshaft edelbrock performer RPM 7102

valvesprings comp cams 982-1

Pistons speed pro hypereutectic H601P30

pistonrings R1037430

conrods Eagle H beam 5565B3D

oil pump Summit Racing® Oil Pump and Pickup Kits SES-3-60-08-001"

do you think this will work ?
any help is greatly appreceated!
Click to expand...
Off to work.
Will look into more later today.
Rick & John also do Engine tech like Grumpy & me.
Think Grumpy is busy today.
 
Arjen said:
hello everyone,

based on the cam that grumphy gave us we have come up with this mingle of bits: ( my students did this )

"camshaft edelbrock performer RPM 7102

valvesprings comp cams 982-1

Pistons speed pro hypereutectic H601P30

pistonrings R1037430

conrods Eagle H beam 5565B3D

oil pump Summit Racing® Oil Pump and Pickup Kits SES-3-60-08-001"

do you think this will work ?
any help is greatly appreceated!
Click to expand...

Arjen,

Just a helpful hint......

You will get better, more complete answers if you would post things like the cam card, we
don't have all the cams memorized. Links to components like pistons and oil pump. Some
members are going to pass on posting answers because they don't have time.

What is your Dynamic Compression Ratio with these pistons and camshaft, rods ???

You don't need a HV oil pump unless you will doing several oil system modification. I don't
know about your Summit pump, but most HV are 25% over volume. I used the Melling 10552,
which is only 10% over volume and I did several of the oil system mods. My pressures hot at
idle (900 RPM) 20-25 psi and max is 60 psi.

The notes on Summit for the Melling 10552 pump is incorrect showing 25%, it should be 10%
https://www.summitracing.com/parts/mel-10552

Oil System Mods
http://garage.grumpysperformance.com/index.php?threads/oil-system-mods-that-help.2187/

Bytor sold his Melling 10552 and went stock.
http://garage.grumpysperformance.com/index.php?threads/10552-oil-pump.9809/

Grumpy is busy for a couple days, so he might not answer right away.
 
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