I just read the article in the 'Modified Mag' magazine on this hatch with a b18c1 putting down 256whp

On the setup, hes running a Renault high flow cat..

now my question is.. why would he run a high flow cat, rather then just cut the cat and put in a test pipe?

wouldnt he gain more power out of having no cat rather than a high flow cat?

 

It's illegal to run a test pipe and not friendly to the enviroment.. I run a cat on my 247 whp street car

 

tbone you tree hugger!

nah, everyone has different opinions. im running straight pipes to a green apexi n1 . hell! i live in NJ, its not like we live in the healthiest environment anyway

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ceLtic &raquo;</TD></TR><TR><TD CLASS="quote">tbone you tree hugger!

nah, everyone has different opinions. im running straight pipes to a green apexi n1 . hell! i live in NJ, its not like we live in the healthiest environment anyway </TD></TR></TABLE>

Honestly my car needs to pass smog as its driven all summer long , so I run a cat.. Plus it's so loud and ugly sounding without it, it has that annoying rasp without it..

 

renault cat..isn't that what hytech uses?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">

Honestly my car needs to pass smog as its driven all summer long , so I run a cat.. Plus it's so loud and ugly sounding without it, it has that annoying rasp without it..</TD></TR></TABLE>

understandable... but inspection stickers here are a dime a dozen.... heheh

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote"> It's illegal to run a test pipe and not friendly to the enviroment.. I run a cat on my 247 whp street car</TD></TR></TABLE>

Maybe it's time we changed out that carsound for https://honda-tech.com/zerothread?id=1128725

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SMSP &raquo;</TD></TR><TR><TD CLASS="quote">

Maybe it's time we changed out that carsound for https://honda-tech.com/zerothread?id=1128725</TD></TR></TABLE>

I agree Dave , its about time you sponsored me something

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by athoughts &raquo;</TD></TR><TR><TD CLASS="quote">b18c1 putting down 256whp</TD></TR></TABLE>

a little off topic...but that thing must be a 2.0L right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chillinit &raquo;</TD></TR><TR><TD CLASS="quote">a little off topic...but that thing must be a 2.0L right?</TD></TR></TABLE>


at least 2L

 

TBone.....what do are you using? Have you dynoed your car with a cat, then without one???? Any numbers...

 

Nothing wrong with tree hugging but what would be wrong is not finding the potential extra power in using a test pipe at least for the track

 

In the article it said it had a 85 mm bore and a gsr crank I think. So yeah over 2 liters.

 

Road & Track tested on a dyno the difference between test pipes and Random Technology high flow cats on a Viper GTS. It made like 8WHP MORE with the cats in place.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dynotuned &raquo;</TD></TR><TR><TD CLASS="quote">In the article it said it had a 85 mm bore and a gsr crank I think. So yeah over 2 liters. </TD></TR></TABLE>

Actually 85mm bore and gsr crank are 1997.

I dont need a test pipe because I run open header at the track...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EVOL &raquo;</TD></TR><TR><TD CLASS="quote">renault cat..isn't that what hytech uses?</TD></TR></TABLE>

This is correct.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">

Honestly my car needs to pass smog as its driven all summer long , so I run a cat.. Plus it's so loud and ugly sounding without it, it has that annoying rasp without it..</TD></TR></TABLE>

i'm just kind of curious... how the heck do you pass smog with your setup? it sounds quite intense.

 

I have a 99 si coupe. here are my mods. I havent dynod it yet the motor is bein put together right now. I was just wonderin if anyone has an idea of what I'll be putting out.

Engine Mods: (B20Vtec) Built 98 CRV Block, 99 SI Transmission, 99 SI ported & polished head, Crane Stage 2 Cam Shafts, Super Tech valves, Super Tech Dual Titanium valve springs, Super Tech Titanium retainers, AEM Tru Time Adjustable Cam Gears, Apexi Vtec Controller, AEM Short ram intake, 70mm Throttle body, Skunk 2 Intake Manifold, NGK Spark Plug Wires, Zex Plugs, AEM Fuel pressure Regulator, JE Stroker Kit ( JE 11:1 Compression Pistons, Eagle Rods, Eagle Forge Steel Crank),Golden Eagle Oil Line Kit, Jegs Fuel Pressure Gauge, ACT Street Light 12lbs Flywheel, ACT Stage 2 Xtreme Pressure Plate Clutch, DC Sport 4-1 Headers, Hi-Flow Cat,Greddy Evo Exhuast System, Pro 1 Short Shifter, Enjo Urethane Motor Mounts

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by obd2gsr &raquo;</TD></TR><TR><TD CLASS="quote">

i'm just kind of curious... how the heck do you pass smog with your setup? it sounds quite intense.</TD></TR></TABLE>


It's possible with having my wideband and laptop in the car.. I was suposed to run it through the day after I bent up my valves last time.. So I need to try as soon as the car is running again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JoeB18R &raquo;</TD></TR><TR><TD CLASS="quote">Road & Track tested on a dyno the difference between test pipes and Random Technology high flow cats on a Viper GTS. It made like 8WHP MORE with the cats in place.</TD></TR></TABLE>

thats because of the restirctions of the stock viper ecu not because of performance. If you put a standalone and tune before/after there would be at least a good 20-30hp on the viper.

Greg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SI_In_Disguise &raquo;</TD></TR><TR><TD CLASS="quote">I have a 99 si coupe. here are my mods. I havent dynod it yet the motor is bein put together right now. I was just wonderin if anyone has an idea of what I'll be putting out.

Engine Mods: (B20Vtec) Built 98 CRV Block, 99 SI Transmission, 99 SI ported & polished head, Crane Stage 2 Cam Shafts, Super Tech valves, Super Tech Dual Titanium valve springs, Super Tech Titanium retainers, AEM Tru Time Adjustable Cam Gears, Apexi Vtec Controller, AEM Short ram intake, 70mm Throttle body, Skunk 2 Intake Manifold, NGK Spark Plug Wires, Zex Plugs, AEM Fuel pressure Regulator, JE Stroker Kit ( JE 11:1 Compression Pistons, Eagle Rods, Eagle Forge Steel Crank),Golden Eagle Oil Line Kit, Jegs Fuel Pressure Gauge, ACT Street Light 12lbs Flywheel, ACT Stage 2 Xtreme Pressure Plate Clutch, DC Sport 4-1 Headers, Hi-Flow Cat,Greddy Evo Exhuast System, Pro 1 Short Shifter, Enjo Urethane Motor Mounts</TD></TR></TABLE>

LOL sex plugs are pure crap. I used them ONCE when I was running nitrous. On a 50 shot I melted one of these "pregaped and designed for nitrous and turbo import applications" plugs. Hell, the damn plug it self wasnt even a week old when it melted (and I mean the center metal core AND the external white ceramic).

Of course they are made in France, so there you go.

Seriously I switched to NGK plugs after that and didnt have ONE foul plug over the next year of nitrous use.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">thats because of the restirctions of the stock viper ecu not because of performance. If you put a standalone and tune before/after there would be at least a good 20-30hp on the viper.

Greg</TD></TR></TABLE>

the test pipe still made more power then stock Im saying that the high flow cats mademore power then stock or with the test pipe. it had nothing to do with the ecu.

 

how about cars other than a viper. ?

 

well you can decrease power by eliminating too much backpressure especially on small torqueless engines. I could see this happeneing on a civic with a large diameter straight through exhaust, since the cat creates some backpressure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tbone &raquo;</TD></TR><TR><TD CLASS="quote">

Honestly my car needs to pass smog as its driven all summer long , so I run a cat.. Plus it's so loud and ugly sounding without it, it has that annoying rasp without it..</TD></TR></TABLE>
You could also put a resonator in where the cat is supposed to be which will flow better than even a high flow cat or you could just get an exhaust that is worth a damn.