| From | Message |
EyeTrip
R/T
6/17/2002
02:33:36
|
 Subject: My R/T is A Turd!
IP: Logged
Message:
I am about out of ideas. I'm now frustrated!
Went out Friday to the drag strip and the best I could do is 14.99!
This just isn't right......
HomePage
|
EyeTrip
R/T
6/17/2002
20:51:41
|  RE: My R/T is A Turd!
IP: Logged
Message:
The best part is, I raced guy with a SS/T ram that just installed a Powerdyne 6#'er with a jet chip and gibson headers. We ran neck to neck all the way down.
It just isn't right....
HomePage
|
CW
GenIII
6/17/2002
21:33:48
|  RE: My R/T is A Turd!
IP: Logged
Message:
Hmmm something isn't right. Sounds like a heatsoaked supercharger. Not that I have any experience but installing a blow off valve with a 9lb pulley I have heard works well. Was it hot and or humid and what elivation were you running at. You should be faster as mine will run a 14.9 in close to 80° weather. That is measured with a G-Tech though.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/18/2002
00:15:18
| RE: My R/T is A Turd!
IP: Logged
Message:
It was 80deg at about 70feet altitude humiduty was about 20%. Just a thought... do you think the stock PCM is holding it back? I took a reading with the laptop and it showed 168F at one time. Is this bad? hehe
HomePage
|
CW
GenIII
6/18/2002
08:51:54
| RE: My R/T is A Turd!
IP: Logged
Message:
What was 168°? If it was coolant temp that is good. If it is IAT that is not good. Where did you locate the IAT to? Like I say it should be better. My times are at 3000 feet.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/18/2002
10:01:18
| RE: My R/T is A Turd!
IP: Logged
Message:
Sorry it was the IAT temp. And I relocated it in the intake tube to the S/C. I think the headers are putting out too much heat. My fuel temp is high aswell.
What do you think of heat wrapping the headers?
HomePage
|
CW
GenIII
6/18/2002
14:16:41
| RE: My R/T is A Turd!
IP: Logged
Message:
Not a good idea on the street I have seen where a little moisture gets into the wrap causing metal fatigue resulting in a blown header. Can you make it so it can draw cooler air? I wish Bernd was in on this one he knows alot more about supercharging than I do.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
4wDakota
GenIII
6/18/2002
15:40:23
|  RE: My R/T is A Turd!
IP: Logged
Message:
Why don't you get an IAT adjuster,They have been out of stock but I'm sure Bernd could loan you one or help you rig one up. At least try it. You may be able to put a resistor inline.
Cut the wire going to the IAT and use a quick connector to put it back together. Make a 1/4 mile run at the track or G-Tech.
Pull the quick connector off and using 2 quick connects install a small piece of wire with a resistor soldered in (Bernd should be able to suggest a resistor to drop the temp about 40 degrees). Run the truck again and see what happens.
That will tell you if its the timing being pulled out because of the IAT.
98 CC 4x4, 5.2 Auto 3.55LSD
|
4wDakota
GenIII
6/18/2002
15:42:25
| RE: My R/T is A Turd!
IP: Logged
Message:
Another suggestion.
This may be nuts but relocate the IAT sensor in front of the blower, right at the flter so the compressor heat doesn't throw it off. Then back out timing manually with an aftermarket ignition to keep it from pinging.
98 CC 4x4, 5.2 Auto 3.55LSD
|
CW
GenIII
6/18/2002
20:01:48
| RE: My R/T is A Turd!
IP: Logged
Message:
Part of the problem I think is the fact that the supercharger is getting heat soaked but I am not 100% sure.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/18/2002
20:30:21
| RE: My R/T is A Turd!
IP: Logged
Message:
Ok, here is some numbers at the 1/4 mile
IAT - 102F
Spark Adv - 28.0deg
TPS - 61%
RPM - 4380
Load - 70%
MPH - 89
ECT - 208
Why is the spark advance not up around 40deg?
As soon as I back out of the throttle it jumped to 40deg. I also seen 40deg advance @150F IAT just messing around. I'm lost.
HomePage
|
EyeTrip
R/T
6/18/2002
20:40:57
| RE: My R/T is A Turd!
IP: Logged
Message:
I thought of that too. I have a bypass valve on it. I did notice a big difference when I installed that 2months ago. The charger is cooler and I hit a full 6PSI at 3500RPM
HomePage
|
CW
GenIII
6/18/2002
23:40:48
| RE: My R/T is A Turd!
IP: Logged
Message:
Because 40 ° is only good for part throttle if I remember correct 28 does sound a little low though. I think my '79 1/2 ton is set for 36. It has been so long since I played with timing that I am having troubles remembering.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/19/2002
01:33:28
| RE: My R/T is A Turd!
IP: Logged
Message:
The spark advance fluxuates through out the power curve? I thought that WOT it should max out on the advance.
I guess I still think "Old school" hehehe
HomePage
|
CW
GenIII
6/19/2002
08:58:25
| RE: My R/T is A Turd!
IP: Logged
Message:
At WOT it should pretty much climb up to the max point but I am kinda old school there. More spark advance is needed for part throttle because of the lower combustion chamber pressure.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/19/2002
19:36:34
| RE: My R/T is A Turd!
IP: Logged
Message:
Question: Should my TPS sensor read around 100%?
HomePage
|
CW
GenIII
6/19/2002
23:05:02
| RE: My R/T is A Turd!
IP: Logged
Message:
At wide open throttle yes. Were you at WOT when you looked at the sensors?
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/19/2002
23:10:21
| RE: My R/T is A Turd!
IP: Logged
Message:
Yup! Maybe I have a BINGO!
So next question: Ya think I might have a bad TPS? It's bin smooth otherwise. I went out and hooked up with key on and if I mash hard I can get 73%.
I guess I need to get help to see if the butterflys are wide open.......
Thanks CW
HomePage
|
CW
GenIII
6/21/2002
08:53:12
| RE: My R/T is A Turd!
IP: Logged
Message:
Yes get a helper and see if the throttle blades are standing on end at WOT. If the TV cable is over adjusted it can inhibit the throttle opening.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/22/2002
05:18:09
| RE: My R/T is A Turd!
IP: Logged
Message:
OK I hooked up the laptop then I took reedings....
TPS closed = 7%
TPS WOT = 78%
TV Disconnected = Same no change
closed or WOT.
I'm not thinking it's the TPS because it's values are still smooth on either end of the spectrum.
Can the IAT really make that much difference?
HomePage
|
CW
GenIII
6/22/2002
10:24:58
| RE: My R/T is A Turd!
IP: Logged
Message:
I wouldn't think so but I have never played with supercharged applications. Are you actualy getting WOT with the throttle blades? I mean looking at them while someone stands on the thottle.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
|
EyeTrip
R/T
6/22/2002
13:56:18
| RE: My R/T is A Turd!
IP: Logged
Message:
Yeah I did that last night. I had a buddy come over and we verified the butterflys are wide open. Then "ouch" the bottle got me "ouch"
HomePage
|
EyeTrip
R/T
7/11/2002
06:23:48
| RE: My R/T is A Turd!
IP: Logged
Message:
OK.... now I removed the rubber shield on the right side of the grill ... and at hyw speeds it ROCKS.... starting to get the real problem here
HomePage
|
kota on 20s
GenIII
7/18/2002
00:42:52
| RE: My R/T is A Turd!
IP: Logged
Message:
that is the same thing that drtswinger was experiencing. try getting some dryer hose and funneling the cold air to the air filter.
Eric, 98 5.2 5speed, K&N gen II, 50mm TB, 2bbl M-1, 1.7RR's, JBA ciramic headers, carsound cat, dumped gibson, and a lot more
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Required
Posting: Registered Users and Administrators only
|
