4in down pipe and hp crossover - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 09-23-2008, 12:59 PM Thread Starter
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4in down pipe and hp crossover

i finally ordered a 4in. downpipe for my truck and a hpx crossover from itp diesel just ondering if i will notice any performance gains from either one i currently have the stock dp straight piped to my grand rock stacks and i ordered the crossover line because it seems like everybody has it but me

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
TIM MOYE TRANSMISSION
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post #2 of 4 Old 09-23-2008, 01:54 PM
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Originally Posted by CUMMINS_KILLA99 View Post
i finally ordered a 4in. downpipe for my truck and a hpx crossover from itp diesel just ondering if i will notice any performance gains from either one i currently have the stock dp straight piped to my grand rock stacks and i ordered the crossover line because it seems like everybody has it but me
You'll probably notice some difference with the 4". The other thing you'll notice is decrease in EGT.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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post #3 of 4 Old 09-23-2008, 02:19 PM Thread Starter
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bout how many dregrees you think 100 or so

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
TIM MOYE TRANSMISSION
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post #4 of 4 Old 09-23-2008, 05:38 PM
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Originally Posted by CUMMINS_KILLA99 View Post
bout how many dregrees you think 100 or so
It probably varies by brand. I'm not really sure on #'s, but any drop in EGTs is great. I put my Banks exhaust on the same time I had put my pyrometer gauge in, so I didn't have anything to compare with. I'm about a week away from ditching the Monster muffler & straight piping it. I'm going to monitor whether or not it makes a difference. Let's wait & see if someone has some better insight as far as how much you can get your EGT to drop with an aftermarket exhaust.

"HEAVY" 2001 F-250 XLT 4x4 EC SB:
TW 6pos chip, S&B CAI, Monster 4" exhaust w/ Power Elbow, Big Head WGA, Technicooler, ITP boost fooler, Gen 1 Wicked Wheel, Six-Gun Tuner, Optima Yellow Tops, AutoMeter(Boost, Trans, EGT), CCV mod, MTS TC, MTS valve body, Trans Tech performance rebuild kit, TransGo shift kit, Hornblasters 242 Shocker Train Horns.

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