Any probs w/ the Roe S/C ??

fuelman · Jul 23, 2003

MHQC,

Your point is well taken, however there are not too many stock Vipers running in the elevens in this kind of heat and humidity. My car went 11.92 at 119 mph before the super charger, but that was in ideal conditions. My car now will hammer out low 11s' at a terrible track in terrible weather conditions. Also, it is easy to make a 14 second car go low 13s, and it is easy to make a 13 second car get into the high 12s, but when you want to take a street car into the high 10s low 11s it takes more it is a whole new ball game. I am sure if I strapped on a set of slicks and skinnies I would get the high 10 second pass, even in this weather. I just want to be able to do it on street tires and a stock engine except the bolt ons.

axe · Jul 23, 2003

What spark plugs are people with Roe SCs using? Any issues with #10?

Was using the Bosch 4428 +4 platinum, but then switched to the plugs that were originally included in the kit (forget what kind), gapped them smaller to .028". With the smaller gap, the #10 plug is noticeably less dirty. I was told and read somewhere that with turbo and sc engines, spark plug gaps should be smaller?

The 4428 come pre-gapped, not sure how much. Didn't notice any difference in how the car drives with the different plugs.

Regarding probs:
1) Car still misfires intermittently though nearly not as much before. Have the MSD connectors but haven't put them on yet.
2) Still experience low speed bucking when car is cold, mentioned by someone else.
3) Idle hang, PCM bug? Unplugging the PCM makes it go away for 50 miles, but then comes back. Didn't happen as much before SC, but having the SC may have exposed this "bug".
4) Still some pinging in 5th and 6th at lower rpms on 91 octane gas.

Other than that, the car runs well, put over 1000 miles on since installation.

Does anyone with a Roe SC have the same drivability as before? Besides having the additional power? When I get in my stock '98 after driving the '96 w/ Roe SC, I think the '98 is smooth, quiet, and refined!! Don't care about the quiet, but smoother driving would be nice.

RedGTS · Jul 23, 2003

axe, I'm running the +4's and since the car seems to be running good I haven't even checked the plugs to see how they look. I also have the minor part throttle surge when cold the first couple minutes, but that's not much of a problem. You also reminded me of another reason to consider the '96 PCM: idle hang. I had a little idle hang before the blower and a more noticeable case of it afterward, but none whatsoever after installing the new (old) PCM. Other than the minor rough idle/surging the first 2-3 minutes after a cold start, my car runs and idles very smooth.

varanus · Jul 23, 2003

The car pulls well with the sc. and impresses a lot of folks. But I have problems with # 10 cylinder as well. I have paid my viper tech to diagnosed wirtually everything with the motor and electrical and it is fine-took about 10 hours of labor to do so. Harnesses, coil packs, fuel injectors, and everything else we could thinkof thatmight cause the car to misfire and foul #10. I have installed the new injector clips, latest vec 2, both ground wires. Car runs smoother and missfire seems to be gone. The problem is I have hi flow cats.
With the vec 1 the first set got burned out and burned the side sill. The right side cat (#10 side) was completely hollow. People told me they saw gas and bits of "paper" coming out of my exhaust. I had to buy new cats. The left cat in there now is about 500 degrees on the outside while the right cat goes beyond the 750 degree range of temp gun. This is at idle. It seems #10 runs about 100 degrees cooler than the rest of the cylinders.
At this point I suspect there is inadequate airflow to # 10 causing it to run rich, dump fuel in cat, and thus overheat it. Once car is up in rpm airflow brings #10 in line with the rest.

If you go catless this is not a problem.. But with cats, burning sidesills is a possibility as mine is are deep brown. Also the car is very hot inside so I will investigate more insulation.

Sean could only think of one possibility and that was that there is a support post in the manifold which may block airflow to #10. So I will be pulling the whole blower off again to take out the post to see if that solves the problem.. For new purchasers this will not be an issue as he has since eliminated the post on the manifold. For the earlier people like me it is something to investigate.

I heard sean is working with intercooling and more boost which I am very intersted in. Hopefully in the next few weeks I will have my alky injection set up.

kverges · Jul 23, 2003

My '01 runs fine. I am not fully satisfied with the tuning of the VEC-2 and had to chase some misfire codes, but this was the best aftermarket part I have ever put on a car.

The VEC-2 tuning software is just around the corner, so I can custom dyno-tune here, so the state of tune does not bother me (too conservatively rich).

You won't regret it, unless you want stupidly high numbers, in which case you'd have to pay $20K or more anyway.

Sean's customer service is second to none and I like the idea that I have complete control over the car and any problems can be fixed right here rather than Florida or Maryland.

Sean Roe · Jul 23, 2003

Following is a letter going out tomorrow to all Supercharger owners. I figure that a lot of you may be reading this thread, so this will save some time

..........................................
Dear Supercharger Customer:

This letter serves to update you on the current status of continuing supercharger developments. At the moment, new software and firmware is being completed, which will allow you to create your own program cards. Additionally, the VEC2 will now have the ability to advance ignition timing and turn on signal outputs (i.e. turn on a relay or shift light). In the meantime, we have also created new “hot weather” program card revisions. These revisions were developed July 19. 2003 and are available for the standard 5 PSI pulley kits. In short, the revised cards are programmed to trim out excess fuel that comes as a result of hotter air (lower density). We are currently able to send these revised cards to our customers through regular US Mail at no charge upon request.

At the moment we are preparing to offer our 3rd production run of Superchargers. This latest production of Superchargers will allow our customers to choose between the standard 5 PSI pulley or an upgraded boost version of a 7 or 8 PSI. We are pleased to announce that current Supercharger owners should have little difficulty in installing the upgrade to increase their boost as well (smaller pulley and larger injectors where applicable).

For the future we are in the prototype development stage of an intercooler, which will become available after thorough testing. The cooler is being designed as a retrofit to the existing system, requiring a modification to the manifold base. Its design goals are to cool the bypass air, cool the boost pressure air and improve air distribution to all the cylinders.

We encourage our customers to use our website for new products and any updates we are offering. Thank you for choosing Roe Racing USA for your Dodge Viper performance needs and we look forward to working with you in the future.
..............................

Beyond that, production run #3 will now include the premium MSD brand injector connectors. We are going to highly recommend the factory ones be replaced. We're also thinking about ways to loan / or rent the crank pin kits out. They are reusable. We'll probably provide them to installers on our list for free, or something like that.

These changes have come about based on feedback from our customers. Though we truly did test the heck out of everything before offering it, you sometimes don't see every variable until you have 100 or so out in the field.

Best regards,
Sean

Cudaman · Jul 23, 2003

Re: Any probs w/ the Roe S/C ??

Something for everyone to think about.....The Roe S/C has been out for less than 1 year and has about 100 units in use ( I think it's birthday is in Sept). My S/C is # 15 and is the FASTEST Roe Supercharged (Macedo tuned) Viper ( Thank you Sean Roe and Larry Macedo).

I have ZERO issues or problems with my car. My car is 2001 R/T 10... I run 8 lbs of boost.... I do NOT have cast pistons ....they ARE forged. I ran a 10.361 at the V-10 Nationals. I need to get my car back to the dyno to see exactly what the number are .... We are currently running about 730 - 740 rwhp or (845 hp @ the crank).

Some of the nicest things I like about the super charger are.....no expensive on going fuel cost ..... I run 93 octane around town..... I can get my fuel ANYWHERE ..... EVERY TIME I give it gas... the car can run a 10 sec pass. The Roe S/C has an early and mid progressive even power and torque curve .... it comes on controllable....no high torquey power band that get the car sideways. It is easy "daily driver" car.... I drive it around town regularly or take it on 300-400 mile trips... my Viper currently has 18,455 miles.

Nitrous is an EXPENSIVE fuel .... you need a bottle heater....can't get at any gas station .... only so may runs per bottle.... must turn bottle on .... nitrous bottle and propane bottle takes up a lot of room especially in a R/T 10.

I loved the car the day I bought it new..... and the S/C made it like a whole new car again..... but now it still has that "street ability" with the adrinaline rush of full throttle.

Cudaman :usa:

varanus · Jul 23, 2003

In the meantime, we have also created new “hot weather” program card revisions. These revisions were developed July 19. 2003 and are available for the standard 5 PSI pulley kits. In short, the revised cards are programmed to trim out excess fuel that comes as a result of hotter air (lower density). We are currently able to send these revised cards to our customers through regular US Mail at no charge upon request.

Best regards,
Sean

Sean, will the leaner program card help with my over rich #10 at idle situation?

It would be great if it would. Thanks

MbnViper · Jul 23, 2003

Roe supercharger here with zero problems since i installed it like 500miles+ now and the car runs great, even in a 100+ hot days (every day is a hot day lol)

happy with the system specially because i installed it my self

had the perfect customer support from sean (thanks Sean) its not easy to justify Roe supercharger in words, or pictures, but if you wanna know if any problems since roe supercharger then (NADA)

requiring a modification to the manifold base.

Sean may i ask is it a new design manifold or just some minor modifications and it can be done to the old manifold ?

SUN RA KAT · Jul 23, 2003

Sean -

At what outside air temperature do you consider "hot weather"?

Thanks.

Cudaman · Jul 23, 2003

Sean -

At what outside air temperature do you consider "hot weather"?

Thanks.

SUN RA KAT.....remember you are asking that question from someone that lives in Florida that is like asking an Eskimo.... At what outside air temperature do you consider "cold weather"?

LOL.... sorry I could not resist..... no one would live in Florida if we did not have A/C.

Cudaman :usa:

MbnViper · Jul 23, 2003

Sean -

At what outside air temperature do you consider "hot weather"?

Thanks.

when air gets heavy and u cant breath and your hands start feeling sticky and you wanna take a shower every hour and when you hear you A/c compressor digging then consider this a hot-weather or a mild hot weather

1TONY1 · Jul 23, 2003

The bolt-on only Roe record appears to be 1Tony's 10.48 on slicks, so a 10.99 on some kind of street tire should definitely be doable, particularly with aftercoolers and such on the horizon.

At the Bowling Green shootout I ran a 10.98 on the Michelins. Stock engine..no rockers, only exhaust, 5 psi pulley.

Cudaman....I think I have my miss fire taken care of with the new injector connectors and another vec2 harness....soooo I wouldn't set on that 10.36 to long if I were you :laugh:

In fact, all these other s/c cars better get busy if they want a nine first (send em back and spend another 20 grand) Dammm, Did I say that ? Just kidding guys

EDIT....Also any guys interested in the Roe supercharger within a reasonable distance of Chattanooga Tn. For the next 3 months I will be offering FREE installation of the supercharger at my shop for the $7495 price. The next batch will start shipping mid September. To hold a spot it takes a $500 refundable deposit. There are only about 30 that are not spoken for so far.

Cudaman · Jul 24, 2003

Re: Any probs w/ the Roe S/C ??

[/QUOTE]

At the Bowling Green shootout I ran a 10.98 on the Michelins. Stock engine..no rockers, only exhaust, 5 psi pulley.

[/QUOTE]

Tony that is an outstanding time on Pilots

[/QUOTE]Cudaman....I think I have my miss fire taken care of with the new injector connectors and another vec2 harness....soooo I wouldn't set on that 10.36 to long if I were you :laugh:

[/QUOTE]

I have to sit a while.... too hot.... no after cooler...hopefully we will have one soon

[/QUOTE]In fact, all these other s/c cars better get busy if they want a nine first (send em back and spend another 20 grand) Dammm, Did I say that ? Just kidding guys

[/QUOTE]

Tony you are quite the jokester.... I hope they do not sent you any hate mail.... LOL

Cudaman :usa:

J DAWG · Jul 24, 2003

EDIT....Also any guys interested in the Roe supercharger within a reasonable distance of Chattanooga Tn. For the next 3 months I will be offering FREE installation of the supercharger at my shop for the $7495 price. The next batch will start shipping mid September. To hold a spot it takes a $500 refundable deposit. There are only about 30 that are not spoken for so far.

Dang Tony, why the hell did you have to say this. You know I am only 5 hours away and am itching to throw one on. Will the in house dyno be set up as well?

varanus · Jul 24, 2003

Roe supercharger here with zero problems since i installed it like 500miles+ now and the car runs great, even in a 100+ hot days (every day is a hot day lol) happy with the system specially because i installed it my self had the perfect customer support from sean (thanks Sean) its not easy to justify Roe supercharger in words, or pictures, but if you wanna know if any problems since roe supercharger then (NADA)

requiring a modification to the manifold base.

Click to expand...

Sean may i ask is it a new design manifold or just some minor modifications and it can be done to the old manifold ?

if your car is running perfect, I wouldn't even worry about the manifold. As far as I know you just have to take off the blower system, take the manifold off and machine down the post so it is flat. Nothing else is supposed to be different.

BTW do you have cats? What number sc are you? I was number 4

1TONY1 · Jul 24, 2003

EDIT....Also any guys interested in the Roe supercharger within a reasonable distance of Chattanooga Tn. For the next 3 months I will be offering FREE installation of the supercharger at my shop for the $7495 price. The next batch will start shipping mid September. To hold a spot it takes a $500 refundable deposit. There are only about 30 that are not spoken for so far.

Click to expand...

Dang Tony, why the hell did you have to say this. You know I am only 5 hours away and am itching to throw one on. Will the in house dyno be set up as well?

hehe....its chicken change..go for it. You and rdustman are hooked BAAAD on the racing

The dyno: A good friend of mine that is a Vette/f-*** tuner talked me out of it(he has givin a deposit). I will have full access and operator ability. His is a full time tuner shop, I was just goin to play with the dyno. Probably best, I really have to much other stuff going on to worry about dynoing Civics to pay for a dyno.

Larry Macedo · Jul 24, 2003

Macedo Motorsports is proud to offer the Roe Racing Polished 5 lb. Kit installed for $7,495.00 and the Black Anodized 5 lb. Kit installed for $7,295.00 with a refundable $500.00 deposit required. Dyno tuning and testing is available at an additional cost and shipping of the kit isn't included in the price quoted above. These kits are upgradable for an additional cost as well, please call for quotes. Thanks!

J DAWG · Jul 24, 2003

Larry, do you have a link to your website. I can't get the one in your sig or the one on the VCA sponsor page list to work?

Just wanted to know what part of Florida you were in.

utahviper · Jul 24, 2003

I think he is close to orlando. Just call his numbers he would be happy to talk to you but just do not mention you like or own porsches????

Larry Macedo · Jul 24, 2003

I think he is close to orlando. Just call his numbers he would be happy to talk to you but just do not mention you like or own porsches????

LOL, I know you think they're ugly, Todd, but I just finished a Guard's Red X50 and with the suspension work, rims, power mods and wing it looks awesome! Sorry you don't like them...

JSMITH,

I am located in Orlando, FL, roughly 30 minutes from Mickey Mouse. My website is undergoing surgery at the moment. Apologies for the inconvenience!

Sean Roe · Jul 25, 2003

Sean, will the leaner program card help with my over rich #10 at idle situation?

It would be great if it would. Thanks

Yes, it should.

Sean -

At what outside air temperature do you consider "hot weather"?

Thanks.

Most of our initial tuning was done in 75-85 degree weather. It was 112 in the dyno room Saturday and we had to take out about 12% of our boost enrichment to get the air / fuel ratio back to 11.7.

Sean may i ask is it a new design manifold or just some minor modifications and it can be done to the old manifold ?

Not a new manifold, just a modification to the existing one to allow for a cooler.

Regards,
Sean

Any probs w/ the Roe S/C ??

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