TnT with converters have me puzzled?
#1578044
02/12/14 03:44 PM
02/12/14 03:44 PM
|
Joined: Nov 2008
Posts: 833 MN
hemidup
OP
super stock
|
OP
super stock
Joined: Nov 2008
Posts: 833
MN
|
Here's what I have. A daily driver 2005 392 supercharged G3 Hemi 4x4 Ram pickup, RFE545 auto trans with 3.92's. At the time of testing the truck weighed 5185lb +/- depending on fuel. Both test's were at Cedar Fall's 2 weeks apart using prototype Edge Racing converters with one being an 11" and the other a 9.5". Both flash at 3800 rpm and the difference in weight is only 2.5 lbs. Nothing else was changed. Made multiple passes with pretty much the same e.t. and mph results. 11" converter track results. Shift points set at 6100 rpm, shift recovery at 4100 which is normal in a stock truck and the shift selector in D for dumb. 60' 1.48 330' 4.34 1/8 6.86 @ 97.6 1/4 11.05 @ 113.2 Happy with the short times, but questioned myself with the 1/4 mph since it only picked up 15 mph in the back half so I pulled it and installed the 9.5" to test. 9.5" converter track results. Shift points set at 6100, and the shift recovery never pulled the motor below 5000 rpm with shift selector in D for dumb. 60' 1.49 330' 4.44 1/8 7.0 @ 98 1/4 11.03 @ 118 Between the 2 coverters the prototype 9.5" slowed my short times down slightly ( a tenth in the 1/8 ) but picked up 20 mph in the back half. I know my short times from both converters should have put my truck into the high ten's but I also deal with "catalitic converter overload protection" mode due to the OEM pcm which dumps in fuel at wot and I have no controll over that. Not yet anyways. So between the 2 prototype converters, what could I tell the builder on how to improve them
Jerry Williams.
|
|
|
Re: TnT with converters have me puzzled?
[Re: hemidup]
#1578045
02/12/14 03:52 PM
02/12/14 03:52 PM
|
Joined: May 2004
Posts: 12,476 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,476
Taxes & Virus's R-US, NY
|
That's not from your convertor, somthing else is going on there...You first run was steller except for the back half and almost looked like it leaned out or boost fell off. A 6.86 is a 10.86, so somthing happened there...Do you have A/F meter to see what happened in the back half....
Me, I would go with the first convertor...9.5 all the way. I have gone 11.13 at 121mph in a 4000lb pump gas Charger, so your light on mph in the back half. Front half is awesome. That run in our charger netted 7.0 at 99mph in the 1/8 with a 1.5 somthing 60ft, so there is more in your combo by a bunch..Figure out where your mph went.
Last edited by Dragula; 02/12/14 03:58 PM.
|
|
|
Re: TnT with converters have me puzzled?
[Re: hemidup]
#1578046
02/12/14 04:00 PM
02/12/14 04:00 PM
|
Joined: Jan 2003
Posts: 6,266 Renton Washington
Triple Threat
master
|
master
Joined: Jan 2003
Posts: 6,266
Renton Washington
|
I would give them all that information, and any data logs you might have that show RPM and MPH, this will tell them Efficiency. My guess given the above info is the 11" is so loose to get that much flash that is is inefficient on the back half. It might be turning RPM, but clearly its not pulling. Odd that shift recovery is so low given how poorly it acts up top. 9.5" sounds tighter, and more efficient. Thats why the truck struggles down low, but picks up acceptable MPH on the back half. I think if this converter can be made a little looser to help the truck get moving from 60-330, and not scrifice efficiency or MPH on the back half, you'll be in good shape. But i'm not a converter guy so
-Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA
|
|
|
Re: TnT with converters have me puzzled?
[Re: hemidup]
#1578047
02/12/14 10:38 PM
02/12/14 10:38 PM
|
Joined: Jan 2003
Posts: 10,081 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 10,081
Frostbitefalls MN (Rocky&Bullw...
|
Those numbers are all over the map. No way to tell whats' up without a LOT of info. Something is going on big time to through the times around like that. Can you Data record boost and fuel curve? converter and engine rpm?
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
|
|
|
Re: TnT with converters have me puzzled?
[Re: hemidup]
#1578049
02/13/14 12:08 AM
02/13/14 12:08 AM
|
Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
60' 1.48 330' 4.34 1/8 6.86 @ 97.6 1/4 11.05 @ 113.2 Happy with the short times, but questioned myself with the 1/4 mph since it only picked up 15 mph in the back half so I pulled it and installed the 9.5" to test. 9.5" 60' 1.49 330' 4.44 1/8 7.0 @ 98 1/4 11.03 @ 118
Looking at the short times the 11" was working better right up to the 1/8... my guess its shutting off fuel on the topend
|
|
|
Re: TnT with converters have me puzzled?
[Re: 383man]
#1578051
02/13/14 03:03 AM
02/13/14 03:03 AM
|
Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Your #'s are close to mine. I am car # 201 and your 1/8 is very close to mine with the 11" in your truck. I figured you would mph way more then I do with your car supercharged but as was said you answered your own question of no top end. Your on par for 10.80's or 10.70's with no trouble if it mph's like it should which I would think should be 125 to 130 if running right on a supercharged eng. And pay no attention to the crappy RT. Ron
Even with his boost he is trying to move 5185 LBS so thats not close to yours
|
|
|
Re: TnT with converters have me puzzled?
[Re: MR_P_BODY]
#1578052
02/13/14 03:33 AM
02/13/14 03:33 AM
|
Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
|
Quote:
Quote:
Your #'s are close to mine. I am car # 201 and your 1/8 is very close to mine with the 11" in your truck. I figured you would mph way more then I do with your car supercharged but as was said you answered your own question of no top end. Your on par for 10.80's or 10.70's with no trouble if it mph's like it should which I would think should be 125 to 130 if running right on a supercharged eng. And pay no attention to the crappy RT. Ron
Even with his boost he is trying to move 5185 LBS so thats not close to yours
Yea he is that just says he is making alot of power with that supercharged Hemi. Even at his weight if its running right I would think it should still mph more then my NA car at about the same et ? Ron
|
|
|
|
|