ASM Monoblade on a SR 396
09-06-2006, 11:13 AM
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ASM Monoblade on a SR 396 So I have this new ASM Monoblade bolted up to a fully ported LT4 intake sitting on my SR 396. It's extremely responsive compared to the 58mm but I'm struggling a little with the idle. The dyno tune air/fuel ratio is dead on where it needs to be, I've set the idle screw up to keep her around 11-1200rpm which it seems to do better with but still almost seems it wants to die pulling up to a light, it won't though just gets down to about 300rpm then it'll come back up around 900 or so.
It's getting a SuperVic here shortly and I wonder if I'll have the same issues, the LT4 intake is the only bottleneck possible in this engine and still not sure the idling issue would be due to the intake or possibly being caused by shaving off the IAC port entrance when you bore out the opening for the monoblade.
appreciate any tips.
It's getting a SuperVic here shortly and I wonder if I'll have the same issues, the LT4 intake is the only bottleneck possible in this engine and still not sure the idling issue would be due to the intake or possibly being caused by shaving off the IAC port entrance when you bore out the opening for the monoblade.
appreciate any tips.
09-06-2006, 12:01 PM
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Sense there's no IAC port to worry about, I'd try running nearest to "0" iac counts as possible maybe 5-10. You probably over that already though with your throttle blades opened up (to change idle instead a combo of IAC and throttle blade opening)...Hope you get it, I want to see what dyno numbers differences you see with that combo. 
Edit: you do realize that you'll have to reprogram idle speed in the computer to get the PCM to try and idle the car. Then just set t-body opening to get the low IAC counts.....
Edit: you do realize that you'll have to reprogram idle speed in the computer to get the PCM to try and idle the car. Then just set t-body opening to get the low IAC counts.....
09-06-2006, 12:54 PM
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Originally Posted by jimbob
Sense there's no IAC port to worry about, I'd try running nearest to "0" iac counts as possible maybe 5-10. You probably over that already though with your throttle blades opened up (to change idle instead a combo of IAC and throttle blade opening)...Hope you get it, I want to see what dyno numbers differences you see with that combo.
Edit: you do realize that you'll have to reprogram idle speed in the computer to get the PCM to try and idle the car. Then just set t-body opening to get the low IAC counts.....
Edit: you do realize that you'll have to reprogram idle speed in the computer to get the PCM to try and idle the car. Then just set t-body opening to get the low IAC counts.....
Originally Posted by Tony Shepherd
Is your IAC counts maxed out in the tune?
09-06-2006, 04:31 PM
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is there still an idle air control motor?
you tuning this?
whats your air fuel ratio idle? with my fairly big cam i had to richen it to around 13.5-14.0, and add some timing.
helped alot
you tuning this?
whats your air fuel ratio idle? with my fairly big cam i had to richen it to around 13.5-14.0, and add some timing.
helped alot
09-06-2006, 04:39 PM
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Originally Posted by blkchevyz
is there still an idle air control motor?
you tuning this?
whats your air fuel ratio idle? with my fairly big cam i had to richen it to around 13.5-14.0, and add some timing.
helped alot
you tuning this?
whats your air fuel ratio idle? with my fairly big cam i had to richen it to around 13.5-14.0, and add some timing.
helped alot
I did not tune it, Mike @GForce dyno-tuned it.
09-06-2006, 07:11 PM
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Originally Posted by BRETTINATOR
I don't have the chart with me here at work but the a/f is dead on from what was on the graph, this car runs a little rich but it puts out more power that way for whatever reason, if you try leaning it, she drops power.
I did not tune it, Mike @GForce dyno-tuned it.
I did not tune it, Mike @GForce dyno-tuned it.
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09-06-2006, 11:33 PM
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Originally Posted by jimbob
I pretty much figured the reason Big cammed LT1 cars make more power a little richer is one bank is too lean. I have never double Widebanded a Big cam LT1 but looking at readings off narrow band, one bank is always leaner. In my case it's the drivers side. By about a half point I would say. So, I noted on the dyno that running about 12.5 to 1 (after Y-pipe, wideband) seems to give most horse power. At the drag strip it seems 12-12.5 gives best mile an hour. With cams like 847 (on strokers) and less you can get away with making most horse power around 13 to 1 (less variance from banks).
Anywho I'll let you guys know how she does this Friday at the track.
09-07-2006, 12:04 AM
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Cool...good luck
I hope to have mine out for the 22-24 Sep races....Now that the fuel pump has been replaced and I have an actual second gear accelleration. It will be interesting to see if it's any faster, should be! (to bad the DA sucks up here now) On a side note...Ellis did get 1.52 60 foot with it, on those lack of fuel runs...."Got to love autos"
Oh, and also I run the same compression as you. AFR 210 heads done by LLoyd...Hyd roller cam though.
I hope to have mine out for the 22-24 Sep races....Now that the fuel pump has been replaced and I have an actual second gear accelleration. It will be interesting to see if it's any faster, should be! (to bad the DA sucks up here now) On a side note...Ellis did get 1.52 60 foot with it, on those lack of fuel runs...."Got to love autos"
Oh, and also I run the same compression as you. AFR 210 heads done by LLoyd...Hyd roller cam though.
Last edited by jimbob; 09-07-2006 at 12:10 AM.
09-07-2006, 12:12 AM
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Originally Posted by jimbob
Cool...good luck
I hope to have mine out for the 22-24 Sep races....Now that the fuel pump has been replaced and I have an actual second gear accelleration. It will be interesting to see if it's any faster, should be! (to bad the DA sucks up here now) On a side note...Ellis did get 1.52 60 foot with it, on those lack of fuel runs...."Got to love autos"
Oh, and also I run the same compression as you. AFR 210 heads done by LLoyd...Hyd roller cam though.
I hope to have mine out for the 22-24 Sep races....Now that the fuel pump has been replaced and I have an actual second gear accelleration. It will be interesting to see if it's any faster, should be! (to bad the DA sucks up here now) On a side note...Ellis did get 1.52 60 foot with it, on those lack of fuel runs...."Got to love autos"
Oh, and also I run the same compression as you. AFR 210 heads done by LLoyd...Hyd roller cam though.
09-07-2006, 12:23 PM
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Originally Posted by jimbob
I pretty much figured the reason Big cammed LT1 cars make more power a little richer is one bank is too lean. I have never double Widebanded a Big cam LT1 but looking at readings off narrow band, one bank is always leaner. In my case it's the drivers side. By about a half point I would say. So, I noted on the dyno that running about 12.5 to 1 (after Y-pipe, wideband) seems to give most horse power. At the drag strip it seems 12-12.5 gives best mile an hour. With cams like 847 (on strokers) and less you can get away with making most horse power around 13 to 1 (less variance from banks).
and BRETTINATOR i was talking about air fuel at ldle. did they do any idle, and part throttle tuning?
09-07-2006, 01:21 PM
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Originally Posted by blkchevyz
i actually swapped my wide band to different sides and didnt see much if any of a change.
and BRETTINATOR i was talking about air fuel at ldle. did they do any idle, and part throttle tuning?
and BRETTINATOR i was talking about air fuel at ldle. did they do any idle, and part throttle tuning?
Last edited by BRETTINATOR; 09-07-2006 at 02:40 PM.
09-07-2006, 06:04 PM
#14
Originally Posted by BRETTINATOR
LLoyd does awesome work, I had LME max my 210s to flow .319, now if I can get my driving down right I might get into the 10s on motor, will find out Friday.
I got a red 93 for you but I may not be able to go to the track due to work
09-07-2006, 06:07 PM
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Originally Posted by blkchevyz
i actually swapped my wide band to different sides and didnt see much if any of a change.
and BRETTINATOR i was talking about air fuel at ldle. did they do any idle, and part throttle tuning?
and BRETTINATOR i was talking about air fuel at ldle. did they do any idle, and part throttle tuning?
09-07-2006, 07:32 PM
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Originally Posted by jimbob
What size cam did you run? and on what LSA...
On a good note the problems fixed, one small 1/8" hole on the monoblade just above the IAC opening on the TB completely cured the problem, runs fantastic now!
09-08-2006, 10:35 AM
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Originally Posted by T/A KID
have any pics, I may have to drill on my Monoblade.
drill an 1/8" hole centerline of the monoblade on the bottom about a 1/4" up from the bottom of the blade just which will be above the IAC opening of the TB.
