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Old July 15th, 2008, 12:48 AM   #1
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E-Shift Procats vs Richie V6 Precat Deletes

I installed a set of the precat deletes on a friends car, so I figure why not delay mine for a few and get a dyno going

so now I have a good comparison dyno between my car with procats... vs a buddys car with no cats

E-shift Cats - 249hp/209tq
No Cats - 260hp/(tq was not recorded)

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Old July 15th, 2008, 06:22 AM   #2
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No cats makes that big of a difference.... nice. Wish there were some torque figures, but beggars can't be choosers!

Any smells with that no cat set up and has your friend thrown any codes?
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Old July 15th, 2008, 07:30 AM   #3
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no lights... the smell inside the car (not there)... driving behind him with your A/C on... hahahahahahahah... frucker smells like a semi


I'll have more figures next week, I am going to make a couple pulls in the TL with the procats gone... atlp jpipe gone... so I will be running richie's full setup... I expect to be in the 260's in this same dyno... there is another dynojet I've frequented but their numbers are grossely exaggerated... ie. 20hp higher
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Old July 15th, 2008, 09:28 AM   #4
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so he was not cats at all, only a j-pipe? wonder if that would be a smart move to pull in the AV6, if there isnt a big loss in tq.
just for reference sake there three cats corrects??? 2 after the headers and a third cat??? forgive my lack of knowledge on the subject...
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Old July 15th, 2008, 09:41 AM   #5
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You are correct. The two pre-cats and the third cat.

I was debating dropping all three, but theres got to be some back pressure in there somewhere.
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Old July 16th, 2008, 06:57 AM   #6
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Well I anticipated the loss of back pressure, sooo I am running a resonated catback with a single exit 2.5" diamter.. To an hks canister

Single should definitely keep that backpressure

And the 260hp run was in fact with no precats, atlp jpipe, atlp racepipe, and a billy boat non resonated catback...


Another member dyno'd with the full richie setup and the comptech catback and pulled 264
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Old July 16th, 2008, 07:09 AM   #7
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I wonder what some of the J30 accord guys are pulling
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Old July 16th, 2008, 07:41 AM   #8
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I'm gonna order the j-pipe/test pipe friday and then i'll put it on and baseline my car at the dyno (first time ever) with AEM V2 and j pipe/test pipe. then I'll get my Borla and put that on and then dyno it again. This will be an easy 6 weeks though.
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Old July 16th, 2008, 11:16 AM   #9
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^ ^ ^ ^

cool!

I know Richie posted his dyno sheet, but I guess it'll be a few more weeks until people get thiers installed and start testing the gains
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Old July 16th, 2008, 01:44 PM   #10
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Quote:
Originally Posted by pbook4g5 View Post
I'm gonna order the j-pipe/test pipe friday and then i'll put it on and baseline my car at the dyno (first time ever) with AEM V2 and j pipe/test pipe. then I'll get my Borla and put that on and then dyno it again. This will be an easy 6 weeks though.
yea but you'd be missing the pre cat deletes
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Old July 16th, 2008, 03:34 PM   #11
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Nice! Better gains than I expected. Thanks for doing the dyno!

Quote:
Originally Posted by pbook4g5 View Post
Wish there were some torque figures, but beggars can't be choosers!
Do the math?
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Old July 16th, 2008, 04:07 PM   #12
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Getting us Accord owners excited thinking we'd hit 260 whp because this is a J32 graph in the Accord forum FTL.

Wait, I thought it was too much to run the cat deletes and Jpipe/test pipe?
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Old July 17th, 2008, 04:14 PM   #13
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The graph was from 2 j35s...
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Old July 17th, 2008, 09:14 PM   #14
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The graph was from 2 j35s...
Man that's even more a discrepancy lol. Let me guess, they're from Type S's?
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Old July 20th, 2008, 04:00 AM   #15
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hahaha, you are hilarious dude
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Old July 20th, 2008, 04:07 AM   #16
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with this site i learn something new every day.
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Old July 28th, 2008, 07:18 PM   #17
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I would have thought a 3.5 Type S would have Dyno more TQ than 209???
What other mods do you have?
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Old July 28th, 2008, 07:22 PM   #18
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i got some codes with the pre-cat deletes idk why if your friend didnt
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Old August 1st, 2008, 04:04 AM   #19
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Did you rest ur battery...? Cuz I am at 250miles since install, no codes at all...

Curious to see what the codes are

As for the torque #'s... Jpipe + procats = loss of tq
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Old August 1st, 2008, 04:35 AM   #20
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It should not affect the tq as much if you stay with a stock catback system. The combo will allow for more flow away from the engine then when it hits the smaller diameter of the stock pipe it should rebound well to maintain some good numbers (numbers may vary, and some may think a loss of two is something to cry about and other may not.)

As for codes go.... not to sure if I want to play around with the deletes cause of the uncertainty of will I or wont I?
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Old August 1st, 2008, 03:12 PM   #21
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Quote:
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The combo will allow for more flow away from the engine then when it hits the smaller diameter of the stock pipe it should rebound well to maintain some good numbers
Huh? You can't have both.

Look, OEM exhausts are tuned for excellent low and mid range torque by utilizing exhaust pulse waves and their resonance frequencies. Any aftermarket exhaust or cat delete is going to result in lost low end torque especially at light throttle. However, the more restriction you take off the better your full throttle mid-upper range torque/power will be. That's a general rule of thumb. Backpressure is very desirable at low throttle/engine speeds for scavenging but not wanted at higher engine speeds when you want maximum flow and efficiency.
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Old August 2nd, 2008, 12:21 AM   #22
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i got 2 codes p0420 and p0430
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Old August 2nd, 2008, 02:49 AM   #23
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As for the torque #'s... Jpipe + procats = loss of tq
I don't know if I agree with that. I have the first two procats with Richie's test and j-pipe + the stock cat-back. I have way more torque now! I can shift to 6th gear around 40 mph without struggling.
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Old August 2nd, 2008, 05:46 AM   #24
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Quote:
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I don't know if I agree with that. I have the first two procats with Richie's test and j-pipe + the stock cat-back. I have way more torque now! I can shift to 6th gear around 40 mph without struggling.
Dude I'm in 6th gear at 25-30mph 90% of the time. No shuddering or knocking.
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Old August 2nd, 2008, 06:40 AM   #25
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Dude I'm in 6th gear at 25-30mph 90% of the time. No shuddering or knocking.
Wow! Either you're much lighter than me, or you got some pretty good mods to support that. I couldn't do what I'm able to do now when I was stock. Just my experience.
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Old August 2nd, 2008, 12:37 PM   #26
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Dude I'm in 6th gear at 25-30mph 90% of the time. No shuddering or knocking.
Damn, my dad yells at me whenever I'm below 2000 He's old school though, the kind that has an inveterate hatred for fuel injection and ECUs
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Old August 2nd, 2008, 11:40 PM   #27
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Wow! Either you're much lighter than me, or you got some pretty good mods to support that. I couldn't do what I'm able to do now when I was stock. Just my experience.
No idea 93 octane could have something to do with it...just that and an AEM V2. Before I started using 93 octane I couldn't get into any gear below 1200RPM without knocking/shuddering but since I started using 93 on a regular basis I haven't heard knocking in months.
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Old August 3rd, 2008, 12:15 PM   #28
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Originally Posted by t0talacuratl View Post
I don't know if I agree with that. I have the first two procats with Richie's test and j-pipe + the stock cat-back. I have way more torque now! I can shift to 6th gear around 40 mph without struggling.
Do you have a base line? I've been pondering that set-up for a while. I want to remain a total sleeper. Pro-cats+J-Pipe+stock exhaust.
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Old August 3rd, 2008, 06:53 PM   #29
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Do you have a base line? I've been pondering that set-up for a while. I want to remain a total sleeper. Pro-cats+J-Pipe+stock exhaust.
Not sure about the j-pipe, but I did a before and after on the pro-cats. Once the weather gets cooler I will do another dyno.

before/after
241.46hp/248.21hp
222.29tq/225.15tq
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Old August 4th, 2008, 02:32 AM   #30
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Thanx, I know pro-cats+exhaust will yeild great gains, but the exhaust will give me away. Now pro-cats+j-pipe+stock exhaust I always wondered.

Last edited by Archangel72; August 4th, 2008 at 02:33 AM.. Reason: Syntax
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