Considering Roe supercharger on modified motor

[ERDOC]

I have a 97 GTS with ported heads, cam, full aftermarket exhaust etc. I was talking with one of the Viper techs who worked on my car at Woodhouse and he said the heat would be an issue with the Roe setup. My car in stop and go traffic gets kinda hot especially when it is 95 degrees outside. He said that they have had problems with pinging with the Roe setup on a car they did an installation on 2 months ago and I probably would have some issues driving it in city traffic due to the increased heat. Therefore, he recommended a setup with some sort of intercooler which makes sense. The tech said that if doing a few quarter mile runs are your thing, then the Roe setup is fine but for extended driving especially through city traffic, he would not recommend it. Just wondering what the rest of the forum thinks about this issue.

 

[STUGOTS]

Well Sean has an intercooler setup for cars like yours, I would call em up.

1866 275 7326 3# for Sean

 

[1MEANSNAKE]

Well Sean has an intercooler setup for cars like yours, I would call em up.

1866 275 7326 3# for Sean

I didn't think the intercooler was available yet?

 

[99 R/T 10]

If you were to drive it in stop and go traffic, I would say an upgrades radiator and 180 thermostat is a MUST!

 

[ChicagoGTS]

I'm in hot chicago traffic all the time and my car runs at the same temps it did before I put the blower on. Actually it runs a bit cooler because of the headers and exhaust with no cats, it's just alot louder now. Were you're heads shaved as well, blowers don't like high compression; stock I believe is (9.6:1). To my knowledge the intercooler is not ready yet, but I can't wait.

~Matt~

 

[ERDOC]

I do have an upgraded aluminum radiator. I do not know if the heads were shaved. Perhaps I should clarify when I say hot. I have only had the car for about two weeks and the difference I note from highway driving vs. city is 10-15 degrees. I don't know if this is the normal variation or not.

 

[Mike Adams]

From what I heard today the intercoolers is still a little ways. Sean has a lot of project to finish and Dave said it is still a little ways down on the List. He has been working on it for the last year so I imagine when he has time it will not take too long.

 

[Custom Builder]

I do have an upgraded aluminum radiator. I do not know if the heads were shaved. Perhaps I should clarify when I say hot. I have only had the car for about two weeks and the difference I note from highway driving vs. city is 10-15 degrees. I don't know if this is the normal variation or not.

I have just about the same mods as you including the radiator on a 98 GTS and mine runs just a little bit hotter in stop n go, but so does my F-250.

 

[ERDOC]

Mike,
How does paxton's air to water setup compare with Heffner's air to air setup using the vortech? Which can safely run more boost with all other parameters being equal? Who did your install and how much did it cost?

Thanks,
Phong

 

[Mike Adams]

They should work the same. I did it myself. I own a shop and do installs. I ran the kit set up with a Vec2 and larger injectors and a walboro pump in the tank. I have no return line and about 12-15 psi of boost (HAVEN'T CHECK boost level but it is a 2.75" pulley) I don't get much time to work on my own car so I am still tuning it. Right now it in boost it is way to rich. I have aem air/fuel ratio guage and it goes right off the scale to below 11:1. I also lowered my compression with pistons and rods but can also be done by oring the heads and install thicker copper head gaskets (which I stock the are about $250 a pair)

 

[ChicagoGTS]

If the heads are ported only (Blower heads), that works greatly to your advantage as this will have lowered your compression allowing you to run more boost, however with Seans setup the lack of an intercooler kind of negates that fact but at least you'll be ready for it. Some people get their heads done in preparation of forced induction, but a word of caution head work can be done specifically for N/A (naturally aspirated) applications as well which would be an exact opposite affect of what you're looking for (Bad Ju Ju for a blower). There are some great minds on this site that can take this subject to a whole different level. I'm sure you could find a lot on this subject by searching the forums. As far as the cooling goes unless you're concistently going over 200 degrees the difference in temps is normal (ie. expressway cruising vs traffic). What is your traffic temp?

 

[ERDOC]

I had a '94 Z28 which I bolted on a Vortech unit, it ran great for another 40K miles until I sold it. Although this car was not intercooled it really never had any heat or detonation issues. I'm just thinking if the same utility applied to the viper it would make a great daily driver just like my z28 was or perhaps even better with an intercooler.

 

[ERDOC]

I spoke with the Woodhouse tech and he said my heads were very thinly shaved perhaps to 9.5-9.6 compression ratio. My traffic temp is about 205-210 if I am at a complete stop at a long light.

 

[ChicagoGTS]

I had a '94 Z28 which I bolted on a Vortech unit, it ran great for another 40K miles until I sold it. Although this car was not intercooled it really never had any heat or detonation issues. I'm just thinking if the same utility applied to the viper it would make a great daily driver just like my z28 was or perhaps even better with an intercooler.

Ahh, the joys of the evryday driver! I have 615 good reasons for getting in my car every morning.

 

[ChicagoGTS]

When's the last time you flushed your coolant?

 

[utahviper]

If you run the paxton setup with the water to air intercooler I would think that you would the same or maybe a little hotter in stop and go traffic. However, if you run the intercooler in front of the radiator I can't see how the setup would run anything but hotter in stop and go traffic. I know sean has fixes for running hot using a roe blower or anything else. My car runs just as cool now as it did before the roe blower but I don't spend too much time in traffic.

If someone is having detonation issues they need to tune that out. It is very easy to do.

 

[1TONY1]

ERDOC, Your tech has no clue regarding the Roe s/c. He is basing this on one car ? What about all of us with 1000's of miles and no heat problem. I have over 10,000 daily driving. What's a centrifical s/c (Paxton) and an intercooler going to do for you in stop and go traffic ?? Nothing...your not making boost in normal driving....no different than the Roe s/c. Any forced induction with your shaved heads and you should change out the head gaskets for thicker ones.

 

[ChicagoGTS]

Hey Todd what's happenning I haven't seen you on the board for a while. Did you get that sweet ride fixed?

 

[GTSnake]

Sounds to me like it's pretty normal.

I have almost the exact mods and of course it's going to run hot but like 1Tony1 said in stop and go traffic you're not in boost anyway.

If you really want it cooler I would say get a water spray or bigger rad, lower thermostat or open up the side sill ends for more air flow.

 

[ERDOC]

This stuff is great, keep it coming guys. Its been a long time since I got the modification bug in my blood. Anyone know of a reliable shop in Raleigh who can do the install, with perhaps a dyno on site? My main objective is the setup has to be as bulletproof as possible. Keep the suggestions coming!

 

[Dr Roof]

If the Roe Blower is Tuned Properly, Macedo, 1Tony1, PBJ these guys have the cars running well! I think it is all in who does the final Tune. Have Sean Roe install it himself.

I do know that these Roe blower cars are getting faster and faster for less mOney.

 

[Sean Roe]

Hi ERDOC,

It's expected to be concerned and ask these questions as you have a lot invested in your modified engine. As long as your compression ratio is not overly elevated, you should be fine with a proper checkup of the tuning. The program that runs the car is fully adjustable and all of our installers have the software available to them to ensure the cars are running properly. For example, if someone had a ping at 4,000 RPM, we'd simply go to 4,000 RPM on the ignition RPM page and take a degree or so out of the spark advance there.
I've put 242 miles on our shop 1996 GTS since last week, driving to and from the shop daily (all original driveline, never rebuilt). It makes 620 RWHP and 650 RWTQ, has a stock radiator, has done over 400 dyno pulls and averaged 15.4 MPG in my daily commute (15 miles each way, with 30, 45 and 55 MPH zones). If it had problems, it would leave me walking, and it never has.
If it looks right for you, give it some further consideration. If not, that's ok too.

Regards,
Sean

 

[ERDOC]

I saw that Kenny Hawkins is an authorized installer in Raleigh. Has anyone ever had any experience with one of his installations?

 

[Tom Sessions]

ERDOC I can set you up with the install.I am in Wilmington and a supporter of the carolinas VCA.You can reach me at the dealership at 910-799-4210 or cell at 910-228-8477.
Viper days will be at VIR this weekend only 1.5 hours from Raleigh.This will be a good place to meet a bunch of the VCA members.

 

[1TONY1]

Tom is your man for any Viper work, including a Roe s/c.

 

[Achilles99]

I'll have to throw in my two cents about Tom as well... I've never met him, but he read about one of my problems on the board. He emailed me, gave me his phone number, and talked to me for over an hour to help diagnose a problem.

Tom even went above and beyond that, offering to loan me a special Dodge service tool to tighten a cap to fix a fuel vapor leak.

When I move to NC in a few weeks, I'm hoping that Tom will move to the RDU area

 

[newredrt10]

ERDOC
Who are you talking to at Woodhouse. They just did a ROE setup on my car, and I have had no problem with heat, even on 95 degree days.