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pauli
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 Posted: Mon Jan 17, 2005 9:03 pm Post subject: more power, slower 1/4 |
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did a run down the 1/4 the other week. and since putting in a stage 2 wade cam im .5 sec worse than b4.
i can feel the power there, my guess is ive lost all tourque down low. this comes as my 60 ft time was 2.6 sec.
on the car already was a set of super salon pacemakers with 2.5 inch exh't.
running a standard auto and diff(non lsd).
so can i be right by saying ive lost all my power from the launch which is y ive lost power, or is something wrong somewere.
or am i just a s**t driver, lol |
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tickford_6
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| Posted: Mon Jan 17, 2005 9:18 pm Post subject: |
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your not the only one to get a result like that.
i ended up taking the cam out and puting the XR one back in |
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drazull
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| Posted: Mon Jan 17, 2005 11:04 pm Post subject: |
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| By chance did you put the timing gear on as well? |
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Interceptor
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| Posted: Mon Jan 17, 2005 11:20 pm Post subject: |
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| are you having any traction problems? |
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SVO XR6
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| Posted: Tue Jan 18, 2005 1:58 am Post subject: |
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thats weird, How you launching?
do you change gears or let the auto do it? |
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eed-250
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| Posted: Tue Jan 18, 2005 3:18 pm Post subject: |
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think u got the same problem as SVO_XR6 pauli, s**t driver.
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jonbays
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| Posted: Tue Jan 18, 2005 4:18 pm Post subject: |
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2.6 for the 60 is really poor.
Have you dialled the cam in properly with a vernier cam gear?
My experience with advancing and retarding my JMM dev3HL would say you may need to advance the cam up a little.
Min revved its brain out well but was a dog down low till I dialled it in properly. Even then though the low end was better before the cam. |
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Bozz
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| Posted: Tue Jan 18, 2005 6:24 pm Post subject: |
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This is exactly the problem many people have because they think every last KW will make the car faster when in reality a car can be tuned to have 10% less power and yet do the quarter 5% quicker. How? Its all about torque and power spread and the driver to a lesser extent. For example if you have 90% of your maximum torque available throughout over 50% of the rev range, the car will be MUCH quicker than one that has 90% of the torque available over 20% of the rev range but 20-30% more peak power.
The problem is people think they need more power. Its not as simple as that. |
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Spider_GT
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| Posted: Tue Jan 18, 2005 6:34 pm Post subject: |
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| check all timing liek ont he vernier and that as that makes alot of difference |
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pauli
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| Posted: Tue Jan 18, 2005 7:16 pm Post subject: |
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launching at 2000(thats the stally) and shifting manually.
and no wheel spin
i didnt think u needed 2 play with timing on the wade 2 cams? |
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tickford_6
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| Posted: Tue Jan 18, 2005 7:58 pm Post subject: |
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not sure about pauli
but
mine was dailed in as per wade specs.
made about 15 runs down the strip trying different launches and shift points.
and vever got with in.5 sec of the the time run with the xr6 cam
i even got intouch with wade again and asked them about a few things to try and they told it wouldn't help and to send the cam back for a swap of any grind i want |
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SVO XR6
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| Posted: Tue Jan 18, 2005 9:07 pm Post subject: |
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| pauli wrote: | launching at 2000(thats the stally) and shifting manually.
and no wheel spin
i didnt think u needed 2 play with timing on the wade 2 cams? |
shouldnt have too
What rpm were you changing at? |
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pauli
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| Posted: Tue Jan 18, 2005 9:15 pm Post subject: |
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changing at 5200ish give or take 100.
meh who cares i have a real engine now. |
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USELESS
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| Posted: Tue Jan 18, 2005 10:43 pm Post subject: |
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| Bozz wrote: | This is exactly the problem many people have because they think every last KW will make the car faster when in reality a car can be tuned to have 10% less power and yet do the quarter 5% quicker. How? Its all about torque and power spread and the driver to a lesser extent. For example if you have 90% of your maximum torque available throughout over 50% of the rev range, the car will be MUCH quicker than one that has 90% of the torque available over 20% of the rev range but 20-30% more peak power.
The problem is people think they need more power. Its not as simple as that. |
What he said!!! Stick the standard cam back in.The most imoportant thing is to maximise power down low not at the 500 rpm up top |
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jonbays
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| Posted: Wed Jan 19, 2005 9:06 am Post subject: |
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have to agree if its dialed in thenthis grind isn't working for you.
Stick the XR6 back in or go for Jim Mock new DEV4.
The JMM gear is expensive but it works.
I have the older dev3hl and it works even with an auto fairmont wagon.
It went from 16.8 to 15.6 for the 1/4. Still no rocketship for the 60' though 2.36 best and worst 2.64 giving 15.6 and 16.1 for the full 400m. Just to show the diff same car driver track and day just different launch technique. Best was stall up to only 2000 and no wheelspin. |
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SVO XR6
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| Posted: Wed Jan 19, 2005 10:15 am Post subject: |
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Is the DEV 4 a simular grind to the XR cam?
I thought it would have been more agressive? |
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jonbays
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| Posted: Wed Jan 19, 2005 11:29 am Post subject: |
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| From what I have seen on a dyno an XR6 cam in a modded ecu (unichip) and exhaust AU will give around 140rwkw. Thats about the same as you will get with the dev3hl or dev4 with exhaust but no head mods. I have heard of AU XR6's though with extractors and no ecu only getting 125-135 rwkw too though. |
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SVO XR6
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| Posted: Wed Jan 19, 2005 1:09 pm Post subject: |
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| USELESS wrote: | | Bozz wrote: | This is exactly the problem many people have because they think every last KW will make the car faster when in reality a car can be tuned to have 10% less power and yet do the quarter 5% quicker. How? Its all about torque and power spread and the driver to a lesser extent. For example if you have 90% of your maximum torque available throughout over 50% of the rev range, the car will be MUCH quicker than one that has 90% of the torque available over 20% of the rev range but 20-30% more peak power.
The problem is people think they need more power. Its not as simple as that. |
What he said!!! Stick the standard cam back in.The most imoportant thing is to maximise power down low not at the 500 rpm up top |
Im goin to test your theory.
I have a new cam which gave me a extra 15hp and 12nm, will run down strip n see. Peaks at 5200rpm |
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pauli
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Age:23
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| Posted: Wed Jan 19, 2005 4:53 pm Post subject: |
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| USELESS wrote: | | Bozz wrote: | This is exactly the problem many people have because they think every last KW will make the car faster when in reality a car can be tuned to have 10% less power and yet do the quarter 5% quicker. How? Its all about torque and power spread and the driver to a lesser extent. For example if you have 90% of your maximum torque available throughout over 50% of the rev range, the car will be MUCH quicker than one that has 90% of the torque available over 20% of the rev range but 20-30% more peak power.
The problem is people think they need more power. Its not as simple as that. |
What he said!!! Stick the standard cam back in.The most imoportant thing is to maximise power down low not at the 500 rpm up top |
well i could swap my cams bak, not an xr so i dont realy wanta. plus i like the idle not with a beefy cam. hehehe. and it wouldnt get me anywere.
now if i was 2 put on a higher ratio diff and a 3000 stally then i would be able 2 keep the power and fly through the weak spot of the cam and into the higher torque area. would work better wont it? |
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SVO XR6
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| Posted: Wed Jan 19, 2005 7:59 pm Post subject: |
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correct
With a tuned N/A car, you want to be up in the revs as much as possible, as most the power is there. |
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