Roe SC Owners Question

NDW

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For those of you who have a Roe SC, what other parts/upgrades are required to take advantage of the SC?

Fuel delivery system, ???

Any information would be helpful as I am seriously considering this purchase and would like to hear some real world accounts.

Thanks for your help.
 

RedGTS

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None are "required," but it will definitely add some hp if you open up the exhaust and intake sides with some or all of headers, 3" exhaust, 70mm throttle bodies, and a modified airbox with larger outlets (or an open filter setup with larger elbows). Rockers also add some hp. Sean dynoed his car with these mods in stages and if you'll search back through some of his posts on the s/c development you'll see dyno numbers on the different mods. All the above together produced over 600 rwhp/600 rwtq with the standard 5-5.5 psi pulley.
 

GTS-R 001

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Ronnie is quite right and you only need to worry about fuel delivery if you have extensive mods like all those listed above plus heads and cam. Most time a better fuel pump will suffice.
 
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NDW

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Thanks for the information, I will go back and search for the thread you mentioned. I have a modified air box, filters and a 3" exhaust with hi-flow cats. I have hesitated on the headers and internal engine mods up until now, but maybe it would be the best thing to do at this time.

Thanks.
 

Diablo Joe

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I had to run an upgraded Walbro pump,new regulator,and a Kenny Bell Boost-a -pump to get my A/F in line.But now I have enough gas for just about any mod.

Joe
 

varanus

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Hey Joe

are you using the walbro 255 in tank?
with the boost a pump how much hp will it support?
what is the cost of the keene bell?
where did you get your walbro from?

thanx
 

Diablo Joe

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Yes the Walbro unit is the 255 in tank pump.I believe the Kenne Bell unit will support over 1000 hp combined with the walbro pump.See this link here for more info---------> http://www.kennebell.net/accessories/boostapump/boostapump.htm

Price is around 250 bucks for the Kenne Bell and Ill have to check on the pump price.Unfortunately Ive discovered what was wrong with my car.My hi flow catalytic converter was busted into 50 pieces and one LARGE chunk had flipped sideways and was totally blocking flow.Now I have to redyno as Ive removed the cats and installed dynomax race mufflers.No problem though as I was looking into running a 75 shot of spray down the road anyway and could use the extra gas.BTW,this combo of exhaust parts has an amazimg sound.No drone at all.

Joe
 

Jerome Sparich

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The Walbro 255 can be had for $95 shipped.
smile.gif


If anyone needs it and cant find one for this price or better let me know and I will hook you up.
 

varanus

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Jerome . .is this a direct replacement for stock and where do you get it?

BTW Joe I talked to Sean and the new vec 2 I think will incorporate a boost to the pump so you won't need the boost a pump
 

varanus

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by TTBADBOY:
Yes the Walbro unit is the 255 in tank pump.I believe the Kenne Bell unit will support over 1000 hp combined with the walbro pump.See this link here for more info---------&gt; http://www.kennebell.net/accessories/boostapump/boostapump.htm

Price is around 250 bucks for the Kenne Bell and Ill have to check on the pump price.Unfortunately Ive discovered what was wrong with my car.My hi flow catalytic converter was busted into 50 pieces and one LARGE chunk had flipped sideways and was totally blocking flow.Now I have to redyno as Ive removed the cats and installed dynomax race mufflers.No problem though as I was looking into running a 75 shot of spray down the road anyway and could use the extra gas.BTW,this combo of exhaust parts has an amazimg sound.No drone at all.

Joe

<HR></BLOCKQUOTE>

I am going to spray too. Are you going wet or dry?
 

Jerome Sparich

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varanus,

I will check to see if it direct fit. Anyone know the exact part# for the Walbro for the Viper? Joe maybe? This will give me the answer to your ? faster.

I can get these from someone who I buy parts from. He has these in stock and sells alot to people who have VR4's like myself.

For $95 this is the Walbro 255 and install kit for a VR4 or Stealth TT. So the pump alone just could be cheaper yet for the Viper.

Give me a few days being the New Year holiday and the 2nd being ny b-day I will be god knows where doing god knows what.
smile.gif
Plus the shop is closed anyway.
frown.gif


If there is enough interest I could set up a group buy on these.

Happy New Year All!
 

Jerome Sparich

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Working on a price right now for the Walbro 255

When I find out the price I will post it and if there is interest in it I will get this set up for you guys.

Also can get injectors if needed.
 

Jerome Sparich

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There is a few different model #s of the 255lph.

I need to know what one is the correct one for the Viper. My guy looked it up but he found no listing for the Viper.

I looked and had no luck.

Anyone know the part #???

He is ready to give a deal just need the last pc. to the puzzle.

BTW, I am not getting anything out of this just trying to help out.
 

Jack B

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I changed out my pump with a Walbro 250 liter unit. If this is the same pump you are discussing it is not a direct replacement. Look in the Summit catalog at the highest output model for a 5.0 mustang. This is a 250 liter Walbro.

You can get it to work however, the Viper pump has an intake that projects thru the bottle within the tank and it also has an intake within the bottle. The pump is housed within the bottle to overcome the problem of inertia making the pump run dry.

The pump on the GTS is much easier to change than the RT10. The tank must be pulled on the RT10. If the pump is the same as the one I installed it is not a quick job to do it right. Since the pump is shorter than the stock pump (this is due to the integral manifold for dual pickup) you have to find some way to solidly fasten the new pump. Given a bit more time I would have had a circular (like a donut) piece of neoprene machined to place under the new pump.

The pump itself is also difficult to remove from the bottle. You will need a lot of technique and two long thin bladed screw drivers. If you lose the dual pick up of the stock pump your car will run dry a lot earlier (fuel level) when cornering.

If it will help let me know and I can post a picture and dimensions of the stock pump.
 

Jerome Sparich

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Walbro 255lph

Number of pumps...Cost shipped

10................$100
20................$95
35................$90
50................$85

This is prices shipped to the lower 48
 

1TONY1

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I have not seen a Viper pump assembly. With the Walbro are you replacing only the motor? What about the regulator....use the same one or does it come with another one???If so is it adjustable? Before anybody wastes money on a boost a pump give me a few more days of testing....I also know someone else is installing one to test. Best I can tell from a test drive today it is worth about 1.5 psi at idle and ZERO psi at full throttle with the stock pump assembly and lines. I have about 53 psi at cruise and 48 under acceleration....no change with the boost a pump. And yes it is working. I really thought this would allow the pressure to stay at 53 psi. I need some thinking time...it could be due to the boost in the intake causing the drop. Has anyone checked fuel pressure normally aspirated under acceleration ? If so is there a drop ?

Also Jack B, E-mail me or post those pics if you have them. tnx
 

1TONY1

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by mark rusek:
HAS ANYONE HAD ANY BAD EXPERIENCES WITH THE ROE SUPERCHARGER. ARE DETONATION PROBLEMS OCCURING. HAS ANYONE NOTICED THAT THEY ARE BURNING OIL OUT THE EXHAUST OR NEEDING TO ADD ENGINE OIL DUE TO COMPENSATE FOR OIL BURNING OFF DUE TO STRESS ON THE ENGINE OR PISTON RINGS.ALSO ANY CHECK ENGINE LIGHTS ? DOES ANYONE HAVE A CAR WITH THE SUPERCHARGER INSTALLED FOR 10,000 MILES OR MORE?
i AM INTERESTED IN INSTALLING ONE ON MY VIPER BUT FEAR ENGINE DAMAGE, OR JUST AS BAD,PROBLEMS WITH IT RUNNING RELIABLY, AND CONCERN ABOUT WHETHER IT WILL PASS N.Y. EMISSIONS i CAN BE EMAILED AT [email protected] THANKS FOR ANY FEEDBACK BEFORE I PERFORM SURJERY ON MY BABY. ONE MORE ITEM, DOES THE UNIT CREATE EXCESSIVE HEAT UNDER THE HOOD,OR CAN THE UNIT MELT THE PAINT OFF MY SIDE SILLS, THAT I HAVE HEARD HAS OCCURED WITH SOME AFTERMARKET EXHAUSTS.ALSO DOES THE HEAT CREATED BY THE COMPRESSION OF THE INCOMMING AIR GET COOLED PRIOR TO ENTERING THE ENGINE, AND CAN THIS HEATED COMPRESSED AIR EVENTUALLY LEAD TO ENGINE FAILURE?

<HR></BLOCKQUOTE>

1. There have been some detonation and ck engine light issues, there is temporarily a fix with a MSD retard and when the vec2 ships out all problems with detonation and ck engine lights will be taken care of.
You can't expect to pump boost into an engine with stock fuel and timing and not have detonation, so it is normal without some changes.


2. Burning or using oil because of a blower is a non issue. You will have a little more blow by from the crankcase and out whatever system you choose to take care of crankcase ventilation from your valve covers. It should not need oil added between changes unless you are tracking the car a lot.

3. 10,000 miles might be a little much seeing as these s/c's haven't been out but a few months. I have about 2000 miles on mine including one mountain drive over two days that was 500 miles and two different drag days. The rest was daily driving.

4. The blower does not burn side sills. It is the air/fuel mixture being off at idle that causes the cats to heat up. This should be ok with the vec2. I have only heard of this with three cars. Mine was one of them and I let it get to hot sitting and idling.

5. Engine damage should not be an issue if everything is done correctly. If you install this s/c with an msd or the vec2 it will be fine. Put boost or n02 into any engine without consideration of the a/f and timing and there could be problems. Reliability with the Roe s/c will not be a problem, I feel confident that I could drive anywhere and any distance in my car and be fine.......and it is pushing 53,000 miles.

6. At 5 to 8 psi boost with the proper tuning the heated air will not be an issue. This is a screw type blower and is very efficient compared to other s/c's and does not heat the air near as much. Read this whole article...the kenne-bell/autorotor is the same as the Roe s/c. Pay attention to the difference in air temps and efficiency. With the exact same pully sizes the autorotor made 2+ psi more boost at a lot less air temp.
Compared to the eaton roots type: http://www.kennebell.net/media/articles/COBRA.pdf
There is tons of info on that site.
Underhood temps are going to depend on how you run the car....just like now. You run it harder and it is going to be hotter. Maybe more with any s/c or n02 because hp = heat but nothing that will cause damage.

7. Emissions...maybe someone else will chime in. Sean is working on Cal. stuff whatever that is. I have never had to deal with emissions testing here and am very thankful. I believe a move would be in order for me.

To sum up: There are a few more posts going on now on this board about the Roe s/c and the up coming vec2....you need to read them. If you want ZERO problems don't do anything to your car. Leave it totally stock. I would suggest for your piece of mind give everybody a chance to get the vec2 on and some more miles on the cars. That should be a couple of months. Oh, and please turn your caps off.
 

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