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I'd save my money with upgrading to another stock fuel pump. I would get an aftermarket Walbro with a Radium adapter, but that's just me.
I have read that the upgraded Walbro (455 ?) will heat up the fuel as it cannot be modulated with the stock ECU, which is why I lost interest in it as I don't want to put any stress on the electrical system.
Good read, wish those kind of cats were in my budget..they sound awesome.
I suppose this would be more of a tuner specific question but if I were to get tuned with 200 cell cats and install a set of test pipes afterward, would it throw off the tune?
I know on my MK3 supra, a downpipe will cause boost spike on a cold evening but that car has no boost control other than the wastegate spring.
Hard to say on whether a tune will be required. Assuming the catalysts provide significantly more back pressure than the bypass pipes (which most will), you would likely benefit from a tweak to the tune or at least look at logs to see what it looks like. Here is a picture of the huge 5.66" diameter 100CPI HJS/Emitec Motorsports catalysts I referenced in the link above. These are good for 400hp each at virtually 100% flow efficiency. They dwarf the XR1000 turbocharger or just about any catalyst you see on your typical aftermarket exhaust. These cats aren't cheap but worth it if you are looking to have your cake and eat it too.
Last edited by powdrhound; 04-04-2024 at 01:53 AM.
There comes a point of diminishing returns for most looking for just a rad street car. A good tune, some decent 100/200 cell cats (good 200 may or may not trip the CEL, they shouldn't buy YMMV), and the car will make good power. While Motec ECU, Marston coolers, HJS cats are amazing, they alone cost as much as some of us probably paid for these cars.
Hard to say on whether a tune will be required. Assuming the catalysts provide significantly more back pressure than the bypass pipes (which most will), you would likely benefit from a tweak to the tune or at least look at logs to see what it looks like. Here is a picture of the huge 5.66" diameter 100CPI HJS/Emitec Motorsports catalysts I referenced in the link above. These are good for 400hp each at virtually 100% flow efficiency. They dwarf the XR1000 turbocharger or just about any catalyst you see on your typical aftermarket exhaust. These cats aren't cheap but worth it if you are looking to have your cake and eat it too.
There comes a point of diminishing returns for most looking for just a rad street car. A good tune, some decent 100/200 cell cats (good 200 may or may not trip the CEL, they shouldn't buy YMMV), and the car will make good power. While Motec ECU, Marston coolers, HJS cats are amazing, they alone cost as much as some of us probably paid for these cars.
This is true, 100% know your scope and your intended use case, but the other side of that coin is you can't take the data from cars built to the 1% level and apply what is tested on those parts across the board to all the aftermarket stuff out there. The average exhaust with the tiny 100/200 cell cats does lose power compared to catless or HJS, stock ecu reflashes do leave power on the table relative to standalones, etc. The transitive property does not apply here. Don't expect 1000 hp at 1.3 bar using the basic aftermarket stuff.
I'm just trying to pick the right parts, the first time. Wish I had time/money to try out all of the cool stuff. I actually enjoy the car very much in stock form. Trying to take advantage of my current living situation while i can!
In northern states like NJ they oxygenate gasoline in the wintertime which makes it combust more easily. When they first started doing it in the late 1980s the cars at that time would sometimes run slightly rougher than normal but these days with modern ECU control I have not found it to be much of an issue.
If I get tuned with cats installed and take them off after..or vice versa..how much HP am i potentially leaving on the table?
I have run w and w/out cats ( 200 ) and no noticeable difference in my 1.2 tune per se. Car breathes better catless, even if I didn't. Unburnt fuel = yep.
Do/did people upgrade the toe links with RoW/x73 suspension?
I always see the toe link upgrade when going with aftermarket coilovers but never see it when used with these strut/spring combos. Am I missing something?
Do/did people upgrade the toe links with RoW/x73 suspension?
I always see the toe link upgrade when going with aftermarket coilovers but never see it when used with these strut/spring combos. Am I missing something?
The other day, it was about 70 degrees and humidity was around 30%..it was a dry day. my car ran awesome. off idle throttle response was good and it pulled hard/clean
There have been colder days that were humid and the car felt alot slower.
The other day, it was about 70 degrees and humidity was around 30%..it was a dry day. my car ran awesome. off idle throttle response was good and it pulled hard/clean
There have been colder days that were humid and the car felt alot slower.
Not interested in meth by any means, just curious
Keep it simple, don't add meth, it will kill the car. Intake, good intercoolers, exhaust and tune. You don't need to re-tune the car for diff cats/test pipes, etc. unless you just are turning off the pre-cat o2, things should still work fine and the car will make good power. If you want to turn the boost up, or add turbos, then injectors and fuel pump. It won't hurt to add the pump now, but it's not needed.
04-02-2024, 08:14 PM
