RPi GT Downpipe: 2.0 Redline/GXP

[clif]

Originally Posted by Nemesis

So, your saying that it only feels stronger when under boost measured by the stock boost gauge? Not that this is a bad thing, just that I'm trying to figure it out. Congrats on the new system, did Saturn throw a warrantee baby-fit when you installed it?

Actually, I have had no interaction with the dealer at all yet with the exhaust. However, under the Magnusson...... act, it has to be proven that an aftermarket part CAUSED whatever breakdown was under dispute BEFORE the warranty could be voided. If I am wrong, somebody please correct me, but it is not up to individual dealers to decide, it must be provable the part's fault. That said, I look forward to taking my baby to the dealer for her next visit just to see the faces of the techs when I rev her up a bit.

And no, I do not mean only under boost. She feels happier now under ALL conditions. That MAY be that I am happier now that she sounds more like a REAL sports car.....

Clif

[RPIpower]

Originally Posted by clif

Actually, I have had no interaction with the dealer at all yet with the exhaust. However, under the Magnusson...... act, it has to be proven that an aftermarket part CAUSED whatever breakdown was under dispute BEFORE the warranty could be voided. If I am wrong, somebody please correct me, but it is not up to individual dealers to decide, it must be provable the part's fault. That said, I look forward to taking my baby to the dealer for her next visit just to see the faces of the techs when I rev her up a bit.

And no, I do not mean only under boost. She feels happier now under ALL conditions. That MAY be that I am happier now that she sounds more like a REAL sports car.....

Clif

Here you go.

[vfx]

Excellent.

Originally Posted by RPIpower

Here you go.

[Nemesis]

Not to be a pooper, but what this graph shows is that we lose intial HP and torque by 7-14 hp and gain it all in the rev range starting at 3000rpm. This is probably the best case scenario for an exhaust, intercooler and tune on a 2.0 liter 4-cylinder. But, I'd be a bit worried to lose any initial power for a daily driver. Yes your gaining a lot at the top, but I usually shift around 3250 in regular driving and around 4000rpm for spirited driving. I do "race" it every once in a while, but for a 4 cylinder, initial torque and power are important. I can see that Eloiy really worked to keep as much initial torque and power as he could. Typically when tuners start working on a 4-cylcinder engine, they sacrifice all the initial power for higher rev range power, because most people don't get to see graphs like Eloiy shows us, and they end up buying high end power figures only.

[RPIpower]

Originally Posted by Nemesis

Not to be a pooper, but what this graph shows is that we lose intial HP and torque by 7-14 hp and gain it all in the rev range starting at 3000rpm. This is probably the best case scenario for an exhaust, intercooler and tune on a 2.0 liter 4-cylinder. But, I'd be a bit worried to lose any initial power for a daily driver. Yes your gaining a lot at the top, but I usually shift around 3250 in regular driving and around 4000rpm for spirited driving. I do "race" it every once in a while, but for a 4 cylinder, initial torque and power are important. I can see that Eloiy really worked to keep as much initial torque and power as he could. Typically when tuners start working on a 4-cylcinder engine, they sacrifice all the initial power for higher rev range power, because most people don't get to see graphs like Eloiy shows us, and they end up buying high end power figures only.

The initial loss in the low end is probably due to the intake set up we were trying (more airflow but hotter air). The dip was not there when the car was cooler. If you notice the run number you can see the number "50". Thats the 50th dyno pull we did! The car never sat for more than 5 minutes between pulls so at this point it was pretty heat soaked. We are trying to work on a solution that would bring the bottom end up a bit. On my car, I tuned down the torque because of wheel spin issues.

[vfx]

Hey all,

That's my car being tested so I wanted to give my input. I went over to RPI yesterday to drive around with the newest tune. Instead of my normal 100 yard pulls down the front of RPI I went on an interstate drive (the 710 in SoCal) with Eloy. The car pulled much harder in the high RPM's in 4th gear. We all know the car is a beast in 2nd and 3rd but it felt strong all the way to 5000rpm+ in 4th. My biggest complaint is that way too many slow cars were in the left lane. I'm not saying I pulled on a BMW 335ci...but I did. (pulled in a street legal MPH way)
Yes, Nemesis, I did notice a low torque hit. And, yes I missed it. I drove around with the previous tune for a week(the before on the dyno) and loved it. RPI and crew are adjusting for it this week. To be fair, they only did a couple of dyno runs before I got antsy and wanted to dyno/test run the car. I only live a few miles away from them so I will leave it there till they fine tune it. **Eloy took some video with his camera, so hopefully it isn't too shakey to post**
Now that the R1 tune is done, I am going to leave my car with them and beg them to put the larger turbo/custom manifold on (R2 package).

SoCal folks, I can't make the run Saturday, I'll be in mammoth snowboarding. But, feel free to bug Eloy about it. I'm sure the car will be at his shop for a while. sorry Eloy ...


c

Originally Posted by Nemesis

Not to be a pooper, but what this graph shows is that we lose intial HP and torque by 7-14 hp and gain it all in the rev range starting at 3000rpm. This is probably the best case scenario for an exhaust, intercooler and tune on a 2.0 liter 4-cylinder. But, I'd be a bit worried to lose any initial power for a daily driver. Yes your gaining a lot at the top, but I usually shift around 3250 in regular driving and around 4000rpm for spirited driving. I do "race" it every once in a while, but for a 4 cylinder, initial torque and power are important. I can see that Eloiy really worked to keep as much initial torque and power as he could. Typically when tuners start working on a 4-cylcinder engine, they sacrifice all the initial power for higher rev range power, because most people don't get to see graphs like Eloiy shows us, and they end up buying high end power figures only.

[german gt]

Originally Posted by RPIpower

On my car, I tuned down the torque because of wheel spin issues.

LOL - thats funny,

on my car i tuned up the torque in the lows
and mounted 20" rims with much better tires
because of the problem with the wheel spin.

[YellowSky]

Well guys after a week of haveing the new CATLESS DP on the car im happy to report NO SEL!!!!! and car runs GREAT!! and sounds GREAT doing it!!! another awsome product! Thanks Eloy for takeing the extra time with the catless DP to make it so no SEL light comes on!!!!!!!!!

[BlueSkyRL]

Originally Posted by YellowSky

Well guys after a week of haveing the new CATLESS DP on the car im happy to report NO SEL!!!!! and car runs GREAT!! and sounds GREAT doing it!!! another awsome product! Thanks Eloy for takeing the extra time with the catless DP to make it so no SEL light comes on!!!!!!!!!

Hmmm, I'm missing something here No CEL's, No Cat, No way....unless you turned off the engine computer from checking/displaying the fault

[YellowSky]

so your telling me what my car is doing? yet your not behind the wheel...... you should go into business with that talent you have! ..

computer has not been touched.. it is the placement of the sensor that made it not throw a code.. the lower sensor is on a pipe about 8 to 12 inch long.. ask eloy he can explain... SO YES WAY

[BlueSkyRL]

Originally Posted by YellowSky

so your telling me what my car is doing? yet your not behind the wheel...... you should go into business with that talent you have! ..

computer has not been touched.. it is the placement of the sensor that made it not throw a code.. the lower sensor is on a pipe about 8 to 12 inch long.. ask eloy he can explain... SO YES WAY

Yikes...sensitive are we Either way it is ILEGAL to run without a cat. Have fun

[YellowSky]

its ok i live in FL we dont care down here... my question is if its so bad ILEGAL why are you on this thread?

[BlueSkyRL]

Originally Posted by YellowSky

its ok i live in FL we dont care down here... my question is if its so bad ILEGAL why are you on this thread?

Not sure what you mean here??

[roadsterrage]

Originally Posted by YellowSky

its ok i live in FL we dont care down here... my question is if its so bad ILEGAL why are you on this thread?

"These Florida People!!!!! First it was the ballots, now they're taking off their Cats. The earth is in peril, people. Don't you see how upsetting this is? Listen to me people. I'm a Nobel prize winner, for Chrissake."

[RPIpower]

The placement of the O2 sensor was how we were able to get past the CEL for those who want the race pipe. No tune is needed for this.

Cant we all just get along?

[BlueSkyRL]

Originally Posted by RPIpower

The placement of the O2 sensor was how we were able to get past the CEL for those who want the race pipe. No tune is needed for this.

Cant we all just get along?

No problems here with me....all i asked was how yellow dude was not getting CELs

Eloy, thanks for the reply on the O2 sensor location

[RPIpower]

Originally Posted by BlueSkyRL

No problems here with me....all i asked was how yellow dude was not getting CELs

Eloy, thanks for the reply on the O2 sensor location

you got it!

[blackmod]

I thought i would let everyone know that I just got my down pipe put on, thi may not seem special but it was with the magnaflow 3" exhaust. The guys doing it found it a little bit of a pain but they made it work. The exhaust is fully welded from down pipe to tips, one solid exhaust. Just to add it cost $260 to do the install. This seemed to be a decent price as it took them almost three hours to do it. They had to do a little bit of cutting and a new bracket and full weld.

anyone else have install prices?

[nomead]

Has anyone with the downpipe & exhaust found time to make a video yet (or did I just fail to find the post)?