Typical ranges on a 10 second time-slip?
10-27-2009, 07:43 AM
#1
Typical ranges on a 10 second time-slip? Just added a new combo this weekend and dynoing it today with a tune. If the weather is good I want to go tomorrow night. I have no bar so I will just make 1/2 track passes until the end so... what is the typical range for a high 10 second pass @ 3800 lbs? I may not have enough to do it but figure I will need:
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
10-27-2009, 05:41 PM
#3
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Just added a new combo this weekend and dynoing it today with a tune. If the weather is good I want to go tomorrow night. I have no bar so I will just make 1/2 track passes until the end so... what is the typical range for a high 10 second pass @ 3800 lbs? I may not have enough to do it but figure I will need:
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
I would say your right on the money. I have trapped 97 in the 1/8 with 1.48 to 1.46 sixties at 3550 race weight and my car runs consistent 11.1's with a best of 11.04.
10-27-2009, 07:56 PM
#5
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Dyno's don't mean a damn thing. My times are in my sig, and it is definitely going to net a 10 second time slip next time I vist a 1/4 mile track. It ran 11.teens @ 122 when it was 3 tenths slower in the 1/8. My little motor just made 396 to the wheels, no dyno queen here!! lol
Last edited by 358chevycamaro; 10-27-2009 at 08:01 PM.
10-27-2009, 10:14 PM
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Did your AFR lean out after 5700 - if so maybe look at fuel filter, pump or injectors.
What valve springs did you go with - possible valve float?
Did you measure for proper pushrod size?
Is your new throttle body opening to 100% - can check that with a scan tool.
What valve springs did you go with - possible valve float?
Did you measure for proper pushrod size?
Is your new throttle body opening to 100% - can check that with a scan tool.
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10-27-2009, 10:31 PM
#8
You still have the 224/228 cam?
I have a 224/227 cam and swapped to a tv2 cam thats 232/234 and even though my peak hp was only 30hp higher, my hp at 6,300 was 60 more hp!!!!!
Big difference on the big end of the track. Its seems these motors love cams with 230 or higher duration. My converter is 3600 and the combo is sweet.
I have a 224/227 cam and swapped to a tv2 cam thats 232/234 and even though my peak hp was only 30hp higher, my hp at 6,300 was 60 more hp!!!!!
Big difference on the big end of the track. Its seems these motors love cams with 230 or higher duration. My converter is 3600 and the combo is sweet.
10-27-2009, 10:52 PM
#9
Did your AFR lean out after 5700 - if so maybe look at fuel filter, pump or injectors. -Brand new 42's installed 10 minutes prior. No filter/pump fueling problem
What valve springs did you go with - possible valve float? Patriot Gold (.650 lift) were on the new heads
Did you measure for proper pushrod size? I'm running adjustable 1.85 Comps. We measured the wipe pattern by marking the top of the valves
Is your new throttle body opening to 100% - can check that with a scan tool I watched the tuner adjusting everything tonight and when he would go WOT it showed 100 on the HP Tuners
What valve springs did you go with - possible valve float? Patriot Gold (.650 lift) were on the new heads
Did you measure for proper pushrod size? I'm running adjustable 1.85 Comps. We measured the wipe pattern by marking the top of the valves
Is your new throttle body opening to 100% - can check that with a scan tool I watched the tuner adjusting everything tonight and when he would go WOT it showed 100 on the HP Tuners
10-27-2009, 11:18 PM
#10
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Dyno's don't mean a damn thing. My times are in my sig, and it is definitely going to net a 10 second time slip next time I vist a 1/4 mile track. It ran 11.teens @ 122 when it was 3 tenths slower in the 1/8. My little motor just made 396 to the wheels, no dyno queen here!! lol
what lift they go to isnt the important part. what was the closed pressure @ installed hieght? open pressure? are the springs new or used? are you running stock or aftermarket rocker arms?
but even if it didnt fall off and peaked at say 6300ish like it should with that size cam, what numbers were you exspecting with budget heads and a 224 cam thru a stalled auto?
10-27-2009, 11:22 PM
#11
Just added a new combo this weekend and dynoing it today with a tune. If the weather is good I want to go tomorrow night. I have no bar so I will just make 1/2 track passes until the end so... what is the typical range for a high 10 second pass @ 3800 lbs? I may not have enough to do it but figure I will need:
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
1.49 or better 60'
6.90 1/8th
100 MPH 1/8th
Sound about right?
I would love to pull a 10.9 with it first time out.
10-28-2009, 05:15 AM
#12
justin, i have a huntch that your car dont wiegh 3800 and the dyno you were on may read a little low at times. lol
what lift they go to isnt the important part. what was the closed pressure @ installed hieght? open pressure? are the springs new or used? are you running stock or aftermarket rocker arms?
but even if it didnt fall off and peaked at say 6300ish like it should with that size cam, what numbers were you exspecting with budget heads and a 224 cam thru a stalled auto?
what lift they go to isnt the important part. what was the closed pressure @ installed hieght? open pressure? are the springs new or used? are you running stock or aftermarket rocker arms?
but even if it didnt fall off and peaked at say 6300ish like it should with that size cam, what numbers were you exspecting with budget heads and a 224 cam thru a stalled auto?
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
I'm running Comp Magnum 1.85 adjustables and I guess I was expecting around 420. The compression is bumped to 11:1 and I have the intake. I have seen some with just cams do my number.
10-28-2009, 05:25 AM
#13
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ok, your goal is not out of reach by any means. just wanted to make sure you had a realistic number in your head. even tho you cant put faith in numbers like 358chevy said earlier. i think the problem lies in the rockers. no need for adj rockers on your combo that i can see, unless your leaving somethin out. aftermarket rockers tend to be alot heavier on the valve and lead to valve float. alot more spring is usually needed to control them. find your stock rockers and rock out..... i bet your problem goes away
10-28-2009, 08:33 AM
#14
No. I had the 1.85 adjustables for more lift on the stock cam. This cam is designed for use with the 1.85's... why I went with it. It puts the lift at .580 with the rockers. But if it cures a problem I could run the stock rockers and have less lift. Other option is pull the cam, go back to stock rockers and use maybe a larger lift/duration cam that will still work great with the springs.
10-28-2009, 10:01 AM
#15
No. I had the 1.85 adjustables for more lift on the stock cam. This cam is designed for use with the 1.85's... why I went with it. It puts the lift at .580 with the rockers. But if it cures a problem I could run the stock rockers and have less lift. Other option is pull the cam, go back to stock rockers and use maybe a larger lift/duration cam that will still work great with the springs.
I would try stock rockers before you do anything else.
