RPM 408 Results
12-09-2011, 10:35 AM
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RPM 408 Results Made 486hp/481ft-lbs corrected.
Race Proven Motorsports 408
Callies Compstar crank/rods
Wiseco Pistons
FAST 90/90
Trickflow 215cc cnc'd heads (unmilled)
QTP 1 3/4 in headers
QTP ORY, SLP LM
T-56
9in w/ 4.30 gears
Overall I'm happy with the torque throughout the RPM range, but I think it needs more air. Looks like it's starving up top. Thoughts on intake/exhaust are welcome, but the heads aren't changing anytime soon due to lack of funds. Looking for options to continue making power past 6k while limiting impact to low end torque (and keep that torque from dropping off so sharply after 4600 as well).
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Race Proven Motorsports 408
Callies Compstar crank/rods
Wiseco Pistons
FAST 90/90
Trickflow 215cc cnc'd heads (unmilled)
QTP 1 3/4 in headers
QTP ORY, SLP LM
T-56
9in w/ 4.30 gears
Overall I'm happy with the torque throughout the RPM range, but I think it needs more air. Looks like it's starving up top. Thoughts on intake/exhaust are welcome, but the heads aren't changing anytime soon due to lack of funds. Looking for options to continue making power past 6k while limiting impact to low end torque (and keep that torque from dropping off so sharply after 4600 as well).
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12-09-2011, 11:03 AM
#2
Yes,a ported fast 102/102 combo and a better merge on that y-pipe will net you over 500. I also see that you don't have a cut-out listed as a mod. Are you maf or speed density? What lid are you running, if you are?
12-09-2011, 11:37 AM
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Stock Maf, obviously not ideal.
Thinking about switching to a single plane as opposed to another FAST, would like to hear thoughts about that option as I'm not terribly well versed on them.
Lid was on it when I bought it a few years ago, not stock but not sure which manufacture.
Likely will go 3in duals, x-pipe dumped before the axle. The car was dyno'd with open headers to determine how much the exhaust setup was choking it up and didn't change either way so I'm sure the greatest restriction on that side is the headers.
So, thoughts on Victor Jr, 2inch headers to 3 inch dual x-pipe? Pro's, con's?
Thinking about switching to a single plane as opposed to another FAST, would like to hear thoughts about that option as I'm not terribly well versed on them.
Lid was on it when I bought it a few years ago, not stock but not sure which manufacture.
Likely will go 3in duals, x-pipe dumped before the axle. The car was dyno'd with open headers to determine how much the exhaust setup was choking it up and didn't change either way so I'm sure the greatest restriction on that side is the headers.
So, thoughts on Victor Jr, 2inch headers to 3 inch dual x-pipe? Pro's, con's?
12-09-2011, 11:39 AM
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Down the line this will likely happen, but for now I'm looking at the best configuration of external parts. Primarily the pro's & con's of switching to a Vic Jr style setup.
12-09-2011, 12:59 PM
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i think you need bigger heads or a different cam,or both.
12-09-2011, 01:42 PM
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Stock Maf, obviously not ideal.
Thinking about switching to a single plane as opposed to another FAST, would like to hear thoughts about that option as I'm not terribly well versed on them.
Lid was on it when I bought it a few years ago, not stock but not sure which manufacture.
Likely will go 3in duals, x-pipe dumped before the axle. The car was dyno'd with open headers to determine how much the exhaust setup was choking it up and didn't change either way so I'm sure the greatest restriction on that side is the headers.
So, thoughts on Victor Jr, 2inch headers to 3 inch dual x-pipe? Pro's, con's?
Thinking about switching to a single plane as opposed to another FAST, would like to hear thoughts about that option as I'm not terribly well versed on them.
Lid was on it when I bought it a few years ago, not stock but not sure which manufacture.
Likely will go 3in duals, x-pipe dumped before the axle. The car was dyno'd with open headers to determine how much the exhaust setup was choking it up and didn't change either way so I'm sure the greatest restriction on that side is the headers.
So, thoughts on Victor Jr, 2inch headers to 3 inch dual x-pipe? Pro's, con's?
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12-09-2011, 04:21 PM
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12-09-2011, 04:46 PM
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Made 486hp/481ft-lbs corrected.
Race Proven Motorsports 408
Callies Compstar crank/rods
Wiseco Pistons
FAST 90/90
Trickflow 215cc cnc'd heads (unmilled)
QTP 1 3/4 in headers
QTP ORY, SLP LM
T-56
9in w/ 4.30 gears
Overall I'm happy with the torque throughout the RPM range, but I think it needs more air. Looks like it's starving up top. Thoughts on intake/exhaust are welcome, but the heads aren't changing anytime soon due to lack of funds. Looking for options to continue making power past 6k while limiting impact to low end torque (and keep that torque from dropping off so sharply after 4600 as well).
Uploaded with ImageShack.us
Race Proven Motorsports 408
Callies Compstar crank/rods
Wiseco Pistons
FAST 90/90
Trickflow 215cc cnc'd heads (unmilled)
QTP 1 3/4 in headers
QTP ORY, SLP LM
T-56
9in w/ 4.30 gears
Overall I'm happy with the torque throughout the RPM range, but I think it needs more air. Looks like it's starving up top. Thoughts on intake/exhaust are welcome, but the heads aren't changing anytime soon due to lack of funds. Looking for options to continue making power past 6k while limiting impact to low end torque (and keep that torque from dropping off so sharply after 4600 as well).
Uploaded with ImageShack.us
Man I have the same heads and intake on a 402ci LS2. I have an A3 th350 tranny and a 5000rpm stall. My car first time out at the track went 10.39@129mph. It's not the heads. I have work done to my heads and my intake is ported. This is a route you can look at. We opened up the bore size to 4" and dropped in bigger valves to accommodate the bigger cubes.
12-09-2011, 04:59 PM
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I see all these suggestions about what he needs to do and from what I can tell they are all incorrect. Why build a motor, slap it together with a bunch of parts that don't work together. Whatever heads and intake you have then you should get a cam speced for that application. If you change to a Victor intake then you need to change your cam to accommodate the change in air flow to the engine. Spec each part to work together instead of just throwing a bunch of crap together.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.
Good luck man and hope this helps.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.
Good luck man and hope this helps.
12-09-2011, 07:50 PM
#16
I see all these suggestions about what he needs to do and from what I can tell they are all incorrect. Why build a motor, slap it together with a bunch of parts that don't work together. Whatever heads and intake you have then you should get a cam speced for that application. If you change to a Victor intake then you need to change your cam to accommodate the change in air flow to the engine. Spec each part to work together instead of just throwing a bunch of crap together.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.
Good luck man and hope this helps.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.
Good luck man and hope this helps.
Its very easy to spend other people money isnt it? We talked about his build and thought it out. He had plans to change a few things next year and didnt have the money right now but with his motor blown up he wanted to get it fixed. I have built 408's that made over 560rwhp through a TR6060 trans, 9 inch and a 15 inch wheel tire combo with a fast 92 on it. I have also done a 402 that made over 510 with a ported ls6 head and a 90mm intake on it. He didnt have the money to change them right now but the plan was to change them in the future. So instead of having to change the came and a few other things down the road we chose to work around them. The car will run great at the track with the way the torque curve look. Its mostly a street car and it will be fun in the mean time.
12-09-2011, 08:04 PM
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Its very easy to spend other people money isnt it? We talked about his build and thought it out. He had plans to change a few things next year and didnt have the money right now but with his motor blown up he wanted to get it fixed. I have built 408's that made over 560rwhp through a TR6060 trans, 9 inch and a 15 inch wheel tire combo with a fast 92 on it. I have also done a 402 that made over 510 with a ported ls6 head and a 90mm intake on it. He didnt have the money to change them right now but the plan was to change them in the future. So instead of having to change the came and a few other things down the road we chose to work around them. The car will run great at the track with the way the torque curve look. Its mostly a street car and it will be fun in the mean time.
12-09-2011, 08:12 PM
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I see all these suggestions about what he needs to do and from what I can tell they are all incorrect. Why build a motor, slap it together with a bunch of parts that don't work together. Whatever heads and intake you have then you should get a cam speced for that application. If you change to a Victor intake then you need to change your cam to accommodate the change in air flow to the engine. Spec each part to work together instead of just throwing a bunch of crap together.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.Good luck man and hope this helps.
My build is a prime example of the way things need to happen. I had the TFS 215cnc heads, ported 90mm Fast and didn't want to sell them to buy the 225 cnc or the 235cnc heads. So I called Geoff@EPS to spec a cam to work with the parts I already have. As stated above I went a 10.39@129mph N/A right off the trailer and she still has a lot more left in her. My car is 3500+ with me in it so it's not like my car is light weight.
Save your money. Use the heads you have. Match them to the motor (open up to match bore size of the motor) and install bigger valves. Port your intake to help with the CFM needed by the engine. Call Geoff@EPS (or who ever you prefer) to spec you a custom cam to get all your parts to work together. Buy a good flowing exhaust system to help the engine breath. 1 7/8 or 2" stepped to 1 7/8 wouldn't hurt your build either.Good luck man and hope this helps.
Yes, I said about getting the work done to the heads and buying the exhaust but wouldn't this be cheaper than buying all that other crap that was mentioned?
12-10-2011, 12:45 AM
#19
It seems you have a good combo but there's still plenty left to do in bolt-ons.
Be sure to check FS section, I sold my 85 MAF for $30 shipped
Lid - if its not the biggest focker out there, sell it and get one (FTP 104mm)
Chris1313 ram air - Buy it
Stock MAF - Ditch it and opt for either 85mm (for cheap) or go Speed Density
Underdrive pulley - Buy one
Headers - Sell the 1 3/4, get ARH or TSP 1 7/8"
No need to ask me how I know just read this:
https://ls1tech.com/forums/dynamomet...yrs-later.html
Be sure to check FS section, I sold my 85 MAF for $30 shipped
Lid - if its not the biggest focker out there, sell it and get one (FTP 104mm)
Chris1313 ram air - Buy it
Stock MAF - Ditch it and opt for either 85mm (for cheap) or go Speed Density
Underdrive pulley - Buy one
Headers - Sell the 1 3/4, get ARH or TSP 1 7/8"
No need to ask me how I know just read this:
https://ls1tech.com/forums/dynamomet...yrs-later.html
12-10-2011, 09:45 AM
#20
I don't recommend modifying those 215 heads, simply sell them for good money and buy the heads you need. If you could sell those for $1600-$1700 and pick up some used 235's for slightly more, that would be your best bet.
A quick search I found some TFS 235's posted for $1750
https://ls1tech.com/forums/parts-cla...d-checked.html
A quick search I found some TFS 235's posted for $1750
https://ls1tech.com/forums/parts-cla...d-checked.html