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Went to the track very disapointed

This is a discussion on Went to the track very disapointed within the Drag Racing forums, part of the Racing Forums category; I don't quite remember but it is a 281 hr street strip cam from compcam. The machine shop uped my ...

  1. #21
    Member lingenfelter69's Avatar
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    2003 ZO6

    I don't quite remember but it is a 281 hr street strip cam from compcam. The machine shop uped my ratio to a higher lift when they stroked it and fly cut my pistons. The compression was uped to 11 to 1 also

  2. #22
    Member lingenfelter69's Avatar
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    Iam sorry i meant a chip on the rev limiter msd o i would not over rev it.

  3. #23
    Member lingenfelter69's Avatar
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    2003 ZO6

    XR281HR
    XFI RPM High Lift Hydraulic Roller Camshaft

    rpm 2200-7200
    112 lobe
    281intake 283exaust
    .571intake .573 exaust

  4. #24
    Member lingenfelter69's Avatar
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    I messed up it is a xfi xe-r 281hr
    232intake 234 exaust
    .595 intake .598 exaust
    112 lobe

    With the ratio increased and the pistons fly cuted now is there any reason to move to a

    xfi xe-r 287
    238 intake 240 exaust
    .605 intake .609 exaust

  5. #25
    Moderator 35th-ANV-SS's Avatar
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    You need it dyno tuned. That's the only way you are going to see where your peak power is and to get the most out of your set-up. My car with a stock 346 and moderate bolt-on's ran a 13.19 at 107mph and I'm certain I can break into the 12's with practice. My peak power is at 5500RPM and I shift right before redline at 6200rpm. I am thinking that if your rev limiter is set at 5500, you are wasting a lot of ass that the car has.

  6. #26
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    Iam sorry i meant a chip on the rev limiter msd o i would not over rev it.
    There are no chips for these cars.
    Just computer programming.

  7. #27
    12 SECOND CLUB FASTEDDIE Z's Avatar
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    You definetly need to raise your rev limiter to at least 6300 -6500 rpm . 5500 is way too low . My stock engine is set @ 6100 -6200 rpm . You have a cam . Your power is going to be upstairs on the tach . Use it

  8. #28
    Veteran 0rion's Avatar
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    just my opinion here but it sounds like you have multiple issues going on. Firstly, like Luos said, drive your own car. Your mechanic could own a rocket ship but that doesn't mean that with some practice you couldn't out launch him. Especially in your own car. You'll drive it better than he will with practice.....can't get practice from the bleachers.
    Secondly, get a good tune on the car by a reputable tuner. Do you know for sure that the car has a safe AFR and not knocking? The tune is extremely important and will make or break your times.
    Lastly, get at least some drag radials on there. Launching on street tires at your power level might as well be on ice. It'd be hard to cut decent 60's. A 2.3 60' time is horrendous. I don't mean it's bad.......I mean it sucks. Gotta get that car launching and moving out of the hole better than that to run decent times.

    Do those 3 things and you'll see a huge improvement in your times.

  9. #29
    Senior Member FasstChevys's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    That 2.3 60' time is killing him. For every .1 you shave off that, you shave about .2 in the 1/4....so I'd say that car has a lot more in it..
    So, for example, if you can get down to a 1.8 from 2.3 60 foot time, the OP should be .75 seconds quicker at the end.

    I also agree with Orion that a 2.3 60' is flat out horrible. Don't expect to win many races like that.


    Quote Originally Posted by 35th-ANV-SS View Post
    Full slicks? Not sure..but 5500 lbs is a pretty heavy piece of machinery to be pulling really hard off the line
    This shit cracked me up when I read it because I knew you were mistaking the RPMs for weight, and then I noticed you corrected yourself...........man, if you can't laugh at yourself, then who can you laugh at?

  10. #30
    Senior Member FasstChevys's Avatar
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    Quote Originally Posted by FASTEDDIE Z View Post
    You definetly need to raise your rev limiter to at least 6300 -6500 rpm . 5500 is way too low . My stock engine is set @ 6100 -6200 rpm . You have a cam . Your power is going to be upstairs on the tach . Use it
    absolutely - and is the whole purpose for changing the cam in the first place (bigger cam moves more air, consumes more fuel, allows for more power at higher RPMs)

  11. #31
    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    Quote Originally Posted by FasstChevys View Post
    This shit cracked me up when I read it because I knew you were mistaking the RPMs for weight, and then I noticed you corrected yourself...........man, if you can't laugh at yourself, then who can you laugh at?
    Haha yeah I agree ..it was like 2AM and my head and eyes were wondering around on me.

  12. #32
    Moderator Firebirdjones's Avatar
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    85 mph in the 1/8th is roughly 108 mph in the quarter.

    With a motor built the way you say it is, you are definately leaving something on the table. Like Orion said, it's probably a combination of things going on.

  13. #33
    Member lingenfelter69's Avatar
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    So I talked to the machine shop today, showed them my dyno sheets. I thought that the computer was set to cut out at 5500rpm. The power was done climbing at 5200 anyways. Turns out that my coumputer is set to cut out at 5200. Iam going on thursday to get it raised to 6300 and then to the dyno on friday to try again. I guess it is a learning process. Was 399.9 rwhp and 694 rw torque so far, wish me luck.

  14. #34
    Senior Member Too Fast's Avatar
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    I'm sorry. If you are really making ~700 ft-lbs of torque, and 400 RWHP, you should be deep in the 12s if not high 11s. Hell, my car, with no tune and only LT headers/lid/ORY ran 109+ 18 months ago, maybe it was 30 months ago. Best that night was a 12.89, with a 1.99 60 ft.

    I need to get to the track again soon, I've been "Tuned by Frost."

  15. #35
    Member lingenfelter69's Avatar
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    So I only have once chance to raise the rpm before I take it to the dyno, what should I set it at that I know that it will peak and flatten out? I was thinking 6500. The cam pulls from 2200rpm to 7200rpm.

  16. #36
    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    So I only have once chance to raise the rpm before I take it to the dyno, what should I set it at that I know that it will peak and flatten out? I was thinking 6500. The cam pulls from 2200rpm to 7200rpm.
    As I said before, your DYNO tune will tell you how much power you are getting at what RPM. I don't think you necessarily want to just "raise" the rev limiter beyond where the factory setting is at. Do you have stock pushrods?

  17. #37
    Member lingenfelter69's Avatar
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    Iam not sure, the machine shop picked all of the internal engine parts for me.

  18. #38
    Senior Member BLKCLOUD's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    .... Was 399.9 rwhp and 694 rw torque so far, wish me luck.
    You're not making 694 lb/ft of torque at the wheels. Look at your graph again.

  19. #39
    Member lingenfelter69's Avatar
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    Does your torque not multiply threw the rear with the 4.11's?

  20. #40
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by lingenfelter69 View Post
    Was 399.9 rwhp and 694 rw torque so far, wish me luck.
    oh hell no...not N/A ... i'd take your car far away from that tuner and that dyno...go to a real place to get real numbers and a real tune.

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