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  1. Rod ratio

    I agree with rarson. Another example is the ever popular 383 Chevy with 5.700 rods - 5.700 rod / 3.750 stroke = 1.52 Rod/Stroke Ratio. Or the stock Chevy 400 - 5.565 rod / 3.750 stroke = 1.484 Rod/Stroke Ratio. These things will last forever if built right.Chris
  2. TMO Question

    Thanks for the info.Chris
  3. TMO Question

    I understand. I was just curious if anyone had tested the MAF on a bench to see what Hz is equivalent to what air volume. Then the baro pressure and the intake air temp could be used to convert to air mass. Again, No problem I was just curious.Chris
  4. TMO Question

    I am logging with the TMO data logger and I have a question. Is the injector pulse width the actual pulse width or just a baseline? In other words, does the computer use the Low/Mid/High/O2 trims to add or subtract from the injector pulse width? Also, as anyone ever flow tested the factory...
  5. Intake Adjustable Cam Gear Moves Ignition Timing?

    When you change the cam timing on your intake cam it will also change the CAS settings. Even though you have not rotated the CAS housing, you have rotated the CAS sensor in relation to the housing.Chris
  6. CAM alternatives to HKS?

    Leon, That will be great. Please also measure the BCD (base circle diameter) and the Toe to Heel (from max lift to base circle). This will help tell me if they are RG's or not. Also, please note if there is any lettering, casting, or marking of any kind on the cam.Thanks, Chris
  7. CAM alternatives to HKS?

    COMP does not regrind the factory cams. We have always used new cam cores. Your customer was clearly lied to or is lying to you.Chris
  8. How do I hook up My Cam Sensor on my New Cams?

    Here are the specs to drill your cam: 17/64" drill 1.49" deep M8 x 1.25 1.37" deepI am sorry for any confusion. All of our cams from now on will be drilled and tapped for the 2G style sensor so that they will work in either the 1G or the 2G applications.Chris
  9. CAM alternatives to HKS?

    The stock springs work well if they are not worn out. If you are uncertain of the "life" of your springs I highly recommend replacing them with aftermarket springs and retainers. The biggest improvement is from the reduction in weight by using the aftermarket titanium retainers and the added...
  10. CAM alternatives to HKS?

    Yes you can get the "split pattern" grind. The 101100 set comes with the 101-101-8I intake and the 101-102-8E exhaust. The 101200 set comes with the 101-201-8I intake and the 101-202-8E exhaust. So just ask for the 101-101-8I and the 101-202-8E camshafts. I am not 100% sure if this...
  11. CAM alternatives to HKS?

    The cams might not be on their website but give them a call or email them. Either shop can get the cams quickly if they are not on the shelf now.Chris
  12. Camshafts vs Stroker

    This can vary by motor and turbo so keep in mind that this is just an estimate. The 101300 will give you the same rpm in a 2.4L as the HKS264's in a 2.0L. The 101400 will give you the same rpm in a 2.4L as the HKS272's in a 2.0L. However, you will never get a cam that has a good power band...
  13. Camshafts vs Stroker

    I love that line "Just remember that not all products are good on all engine configurations". The combination is more important than just one part.220 duration at 0.050" valve lift and 0.415" maximum valve lift is easily obtained. I will not get into the calculations but, the only real...
  14. Camshafts vs Stroker

    The HKS 272's will be way better than the factory grind. So, since you have them already, it won't cost you that much to at least try them. I did not know that Crower would be making a stroker cam for their catalog. It would be interesting to see what the specs are. I do not know much...
  15. Camshafts vs Stroker

    You will need a larger cam to obtain the same rpm range. A larger motor will "tame" the camshaft. If you want power to ~8500 rpm you will need a fairly large camshaft. I am also assuming that you will have some type of aftermarket fuel management system. The HKS 272/272 combo will work well...
  16. 1/4 time for a newbee

    It's been while but, I remeber that I knocked about a second off of my ET when I foot braked the car. Stomp on the brakes and bring the boost up. You will be amazed by the difference. :)Chris
  17. Tranmission temp gauge

    I don't mean to push Transdude out of the way but, if he does not, B&M sells a transmission temp gauge. I used one a long time ago on a 1970 Cutlass. All you have to do is T into the trans line for the temp probe then wire in the gauge.Chris
  18. Swapping an A/T into my Race Car?

    This is the ultimate setup for racing. You can then easily adjust your gearing to better suite your car. Unlike the stock trans, a GM (or other domestic) trans has a much wider selection of gearing. However, it will be a lot of work (i.e. custom front member, etc.). If you are really after a...
  19. Difference between 1g and 2g cams?

    This can get complicated but here is a basic rule. If the heads flow well at higher lift then the higher lift cam will make more power assuming the duration, separation, etc. is the same. More duration will yield more power at a higher rpm. A tighter lobe separation will yield more peak...
  20. Swapping an A/T into my Race Car?

    He is correct. However, IPT sells one and there are some others on the Auto Trans forum here that are using one. They are mostly 2G guys though so, I do not know how much that will help. I will be making a system for my 1G car so if you need any help just let me know.Chris
  21. Swapping an A/T into my Race Car?

    I am very interested in hearing how this works out for you. I am also trying to convert to an auto. However, it looks like I might just swap cars. From what I've read IPT can setup the trans to hold that kind of power. If you are not on it yet there is an egroups for auto trans DSM's. I can...
  22. Difference between 1g and 2g cams?

    I do not what kind of time restraint that you have but, I could measure your 2G cams and tell you how they compare to some 1G cams that I have measured. I will check them in the head and at the lobe. It would only take a couple of days plus shipping. PM me if you are interested.Chris
  23. Auto to Manual Conversion

    I might just end up doing that. However, I liked this idea so that I could always convert it back to a manual car if I decide to sell it. It would also answer the question of which is better since the car and motor would be the same the comparison should be more accurate. It is also hard to...
  24. Auto to Manual Conversion

    If this is in the wrong place just let me know. I am thinking of converting my manual car to auto. Or, I may just swap with an auto owner. Does any one that switched from the auto to the manual want to sell their auto parts?Chris
  25. autostick

    Yes, I want to use the lever to change gears. But, this should be easy enough with a simple switch going to the controller. However, I have a 1G. Does your controller also work with the 1G or only the 2G?Thanks, Chris
  26. IPT Electromatic auto shifter [Merged 5-7]

    I am going to try to convert my manual car to an auto. For several reasons, three of which are: to piss off the 5 speed guys, to better bracket race the car, and to finally answer the age old question of which is faster. Since I am using the same car / motor the test should be valid. But of...
  27. autostick

    Brad, I am thinking of doing the same thing but still using a floor mounted shift arm. Would you be willing to sell a unit for my car?Thanks, Chris
  28. CAM alternatives to HKS?

    I am not sure of all of our vendors that sell the cams but, we have worked with both Forced Performance and Turbo Trix in the past. They are both great shops that are able to help you with anything DSM related.Chris
  29. CAM alternatives to HKS?

    Yes, you can purchase this grind. However, just be sure that you have a good set of springs and retainers.:D It would be a custom cam order. Just ask your dealer to order 8722/8725 107 +9. It is a dual pattern cam with 203/0.415" intake 211/0.390" exhaust. We can make it a single pattern...
  30. CAM alternatives to HKS?

    I agree 100% with Leon. Something else is wrong. The springs could be severely worn or you are having lifter problems.Chris
  31. CAM alternatives to HKS?

    The 10.3mm is for the HKS272 intake. The 9.8mm is for the HKS 272 exhaust. Lift is dependent on head flow. If the heads flow well past the 10.3mm/9.8mm, then more lift will yield more power.Chris
  32. CAM alternatives to HKS?

    You will not need aftermarket springs or retainers with our catalog cams. However, if you are trying to turn 9000+ rpm with our largest 101200 cams and old factory springs, I would use the Crower pieces. Even thought they are competitors of ours, I would highly recommend the Crower pieces...
  33. CAM alternatives to HKS?

    Yes, it is a package deal. A change to any one of these will affect the VE of the motor.Chris
  34. CAM alternatives to HKS?

    The reason for this has to do with the time available to expel the exhaust gases. It is much easier for a cylinder to remove the exhaust gases at 4k than it is at 5k. Try to think of it as the injector available time to inject. As the rpms increase there is simply less time to do the task...
  35. CAM alternatives to HKS?

    Yes more lift relates to more airflow but overlap does not always hurt torque. If all else is equal, a cam with a tighter lobe separation, more overlap, will have more peak torque. Of course this only applies if the exhaust back pressure relative to the intake pressure is not too high. This...
  36. AEM AEM EMS is it worth it?

    I believe that the AEM is a good unit. However, it is not for the newcomer. If you have a good understanding of how fuel delivery works (i.e. AFR, timing, load points, etc) then it is good. Basically if you can tune with the s-afc now, you will not have a problem with the AEM. I have had...
  37. hypereutectic pistons???

    Hypereutictic pistons have more silicon in them. This allows you to run tighter cylinder wall clearance to reduce "cold engine rattle". That and the lower price are the only advantages that I know of. They are excellent for non-interference fit, non-power added motors. However because of the...
  38. CAM alternatives to HKS?

    I am sorry for that. Those specs are for the 101100. The following are for the 101200:At 0.050" valve lift Degrees IVO: Intake valve open 7 deg BTDC IVC: Intake valve closed 25 deg ABDCEVO: Exhaust Valve open 42 deg BBDC EVC: Exhaust Valve closed -10 deg ATDCAt .1mm...
  39. CAM alternatives to HKS?

    Degrees IVO: Intake valve open 2 deg BTDC IVC: Intake valve closed 22 deg ABDCEVO: Exhaust Valve open 39 deg BBDC EVC: Exhaust Valve closed -15 deg ATDCYou use the extreme energy roller cam lobe profile on the 4g63 cams right? It is in the Extreme Energy Family but...
  40. CAM alternatives to HKS?

    Ahh if I only had a nickel.... :DExactly, the HKS grinds are specified at 1mm (.039") and 0mm (I believe that it is actually .04mm or 0.0016") on their cam cards.Chris
  41. CAM alternatives to HKS?

    Thanks for the reply. They are being tested but I will hold off on the results until the vendor completes all of the tests. It looks very promising but, I do not want to put the vendor in a bind without the data in front of me. I'll let y'all, sorry the southerner in me slipped out, know as...
  42. Evo VIII Cams in DSM? [Merged 5-9] 8 cam

    Sorry but you can not. The timing sensor on the EVO VIII is on the exhaust cam, the motor turns the opposite direction, and the angle from the dowel to the #1 lobe looks to have been changed.Chris
  43. CAM alternatives to HKS?

    Moderator, I work at COMP so if this is out of line just let me know. We are currently selling two sets of cams for the 4G63. The 101100 is 204 @ 0.050" valve lift, and 0.407"/0.391" vs. HKS 264 which is 203 @ 0.050" valve lift, 0.406"/0.386". The 101200 is 212 @ 0.050" valve lift, and...
  44. AEM AEM EMS minimal tuning?

    If you convert to speed density you should be able to get the car to idle and drive in a few minutes. I would recommend using the Automaping feature to get the cruising area of your map close before you take it to the tuner. All it takes is a few drives around the block or on the highway for a...
  45. AEM AEM EMS Questions

    I had no problem with the EMS with V0.94. But after I sent the EMS in to have the UEGO resistor fixed they installed V1.03 and it has not worked with the stock MAF since. I tried to convert back to V0.94 but it still did not work.So if you have the new V1.03 go speed density unless you...
  46. AEM AEM EMS Questions

    I agree that the EMS is a good system but you need the following: MAP sensor (3 or 3.5 bar) GM IAT UEGOThe EMS does not work with the Karmen Vortex MAF. AEM says it will but it doesn't. I tried to get my car to run with the stock MAF and gave up. I was told by AEM that since I removed...
  47. AEM EMS NOT MAF compatible

    I have seen some cars making 300+ hp with the 1G MAF. So by your math that means that anyone not making 600+ hp should not go stand alone. :rolleyes:I wanted to tune around the fact that Mitsubishi is notorious for setting up our cars rich. Also, when I changed exhaust, injectors, turbo...
  48. AEM EMS NOT MAF compatible

    This is how I see it. Why would AEM go through all of the trouble to allow the user to input calibration for different sensors if you could "tune around it"? Would you be happy with a calibration setup for a 5 bar MAP sensor even though you would never go past 2 bar? Would you be happy with a...
  49. AEM EMS NOT MAF compatible

    I talked to the AEM technical advisor on how to view or log the airflow from my MAF on my 1990 GSX. I was told that since they do not know the flow of the MAF they can not determine the airflow. So I advise everyone that is using their MAF sensor to convert over to the MAP. I believe that...
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