BBK LT's and VRS O/R XPIPE = no gains from bassani catted X - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 8 Old 04-10-2002, 08:13 PM Thread Starter
 
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Unhappy BBK LT's and VRS O/R XPIPE = no gains from bassani catted X

Has anyone ever lost HP and TQ across the whole power band after installing LT's?

Well I have. From 1 to 4 across the whole band was lost except in the middle at 5200 to 5700 where i picked up 1 to 4. then went back down.

I switched from a Bassani catted x pipe to BBK LT's and VRS x pipe. And inline 47K resistor.
other than that nothing was changed. I even trired another dyno and I got the same numbers. I just dont get it, It has to be the inline resistor messing things up.

Anyone?

Have of before LT and after LT layed together if anyone can post it for me.

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post #2 of 8 Old 04-10-2002, 08:37 PM
 
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Well I have the resistor too......

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post #3 of 8 Old 04-10-2002, 09:03 PM Thread Starter
 
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Quote:
Originally posted by 32VHEMIJR
Well I have the resistor too......
Yeah but you also have a PROM87. I know it has to be the resistor, I haven't done anything else to car. And I know for GOD DAMN FACT! that LT's and and o/r xpipe are not gonna loose power!!!


So what I am gonna is take the resistor off and soider the wire back together . Drive for a week and re dyno.
If nothing changes then my car is the biggest P.O.S. in the world
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post #4 of 8 Old 04-10-2002, 10:01 PM
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Whats the temp like in your area when you did the dyno pulls? Because if its to cold the resistor will cause the computer to think its ungodedly cold outside and will actually hurt performance, but if it is warm outside then you should be ok. FWIW, I gained almost 2 full MPH in the 1/4 with nothing more then 100K ohm resistor, when I was N/A.

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post #5 of 8 Old 04-10-2002, 10:33 PM Thread Starter
 
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the run with the LT's air temp was 66 deg
w/o LT's and w/o resister it was 90deg.

numbers were sae corrected


I hooked my friends OBD2 deal up to it and it said the air temp was 47 deg when it was more like 80.

I'm just gonna make a dyno trip without the resistor and see what happens because with my mods I should have more then 294 RWHP

and have seen a gain from the LT'S and O/R X pipe
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post #6 of 8 Old 04-10-2002, 11:43 PM
 
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what is the difference between the 100k and 47? How much timing variance might there be on a hot day comparing the resistors to stock?

I have a few 100's and tried one on a semi-cold 55 degree day. That may have been why I wasn't that impressed with it.
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post #7 of 8 Old 04-11-2002, 02:23 AM
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It is possible that you need a tune to see the full impact of the headers. If taking the resistor out doesn't help, you may need a tune. However, I'd recommend the tune anyway.

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post #8 of 8 Old 04-11-2002, 11:00 AM
 
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