Squid4life
Well-Known Member
- Joined
- Jul 5, 2004
So, after seeing Donnie and Norbs playing around with engine sims, I decided to download a free 10 day version of Engine Analyzer Pro to mess around with and see how my SII build will work out. Having a little bit of a hard time as this software is extremely detailed. Some of the info I have, some I could get if my heads were here, some I don't have.
I don't have a cam card, and have limited specs in front of me for what I am thinking about running. One cam is 242 242 @ .050", 113 lsa. That is all I have on it, but it seems similar to the cam that broke in the motor I bought which was 244 244 @ .050", 112 lsa, and 366 lift. I imagine lift would be similar on the cam I am looking to get, but I would have to get the specs or card from Neal.
My block is sitting at 3.98" rough bore, and I have 3.625" cranks. Looking to run 6.3" or 6.35" Crower rods. I have twin TE-63's, Edelbrock converted intake, 90mm TB, the car runs on E85. My heads are Stage 2's, ported by Chapman. No flow sheet yet, and they are not in front of me to take measurements of ports, chambers, or even Ex valve as I have already forgotten that.
I am curious of a few things.
What will the RPM range be? So far with limited info, the engine stops building power at 6k, which obviously means I don't have all my ducks in a row in the S/W. I am curious how much I will need to/ have to rev this motor.
I am curious if this cam mentioned above is a good choice. My use for this car will be a mix of track and street. I will drive it once a week to work, maybe more, and short jaunts to baseball practice for the kids, etc. I am not too concerned with street manners, but I would like it to build boost of course. Richie has a cam for sale on here with the following specs, but it seems a bit large, with a small LSA:
"DLS/PTE 246 solid roller
lift is .616 .616
Dur @ .050 248
lobe lift .385
lobe separ. 110"
Also curious how I need to have my builder set up my spring pressures. Car will be mean, with a decent sized cam, but will see street driving, including highway. So, that throws a new wrench in the equation because if it were a race car only, go high on seat pressure. On a street killer, what kind of pressure will I need?
This also brings up the timing chain vs gear drive question. If I need to have high pressures, then it questions whether I should take chances with a chain. I would prefer to run a chain, and PM the motor and see how it is working after 3-6 months. But, if the cam, RPM, etc requires higher pressures, then obviously there is a point where I should move to a gear drive setup.
Anyhow, Norbs or Donnie, if you want to take a look at the file saved on here, let me know what you think. If there are some changes needed, let me know and I will make them. Donnie, if you have your head specs for your Chapmans, we could use those. Otherwise, I am all ears here!
EDIT: I uploaded the file, but had to change the extension to ".txt". You should be able to change it, or remove the ".txt" and it should convert back. Let me know if it works or not, or if it is even worth playing with.
I don't have a cam card, and have limited specs in front of me for what I am thinking about running. One cam is 242 242 @ .050", 113 lsa. That is all I have on it, but it seems similar to the cam that broke in the motor I bought which was 244 244 @ .050", 112 lsa, and 366 lift. I imagine lift would be similar on the cam I am looking to get, but I would have to get the specs or card from Neal.
My block is sitting at 3.98" rough bore, and I have 3.625" cranks. Looking to run 6.3" or 6.35" Crower rods. I have twin TE-63's, Edelbrock converted intake, 90mm TB, the car runs on E85. My heads are Stage 2's, ported by Chapman. No flow sheet yet, and they are not in front of me to take measurements of ports, chambers, or even Ex valve as I have already forgotten that.
I am curious of a few things.
What will the RPM range be? So far with limited info, the engine stops building power at 6k, which obviously means I don't have all my ducks in a row in the S/W. I am curious how much I will need to/ have to rev this motor.
I am curious if this cam mentioned above is a good choice. My use for this car will be a mix of track and street. I will drive it once a week to work, maybe more, and short jaunts to baseball practice for the kids, etc. I am not too concerned with street manners, but I would like it to build boost of course. Richie has a cam for sale on here with the following specs, but it seems a bit large, with a small LSA:
"DLS/PTE 246 solid roller
lift is .616 .616
Dur @ .050 248
lobe lift .385
lobe separ. 110"
Also curious how I need to have my builder set up my spring pressures. Car will be mean, with a decent sized cam, but will see street driving, including highway. So, that throws a new wrench in the equation because if it were a race car only, go high on seat pressure. On a street killer, what kind of pressure will I need?
This also brings up the timing chain vs gear drive question. If I need to have high pressures, then it questions whether I should take chances with a chain. I would prefer to run a chain, and PM the motor and see how it is working after 3-6 months. But, if the cam, RPM, etc requires higher pressures, then obviously there is a point where I should move to a gear drive setup.
Anyhow, Norbs or Donnie, if you want to take a look at the file saved on here, let me know what you think. If there are some changes needed, let me know and I will make them. Donnie, if you have your head specs for your Chapmans, we could use those. Otherwise, I am all ears here!
EDIT: I uploaded the file, but had to change the extension to ".txt". You should be able to change it, or remove the ".txt" and it should convert back. Let me know if it works or not, or if it is even worth playing with.