Carbed 2 stroke turbo guy's !!!

[Todd H]

Did you change anything on your fuel pump / lines ( or unhook them when you were working on it)

On the XP kit I installed I messed up, and tried to use a "T" in the fuel line to pull from the tank, and the return line from the case. (Really dumb, I know)

Anyways, the case was filling with fuel when it was sitting due to gravity. When it was running, it would dump raw fuel out of the engine like crazy.

Any chance that you may have a similiar problem?

 

[Todd H]

Single pipe for doo triple turbo project

FYI

There is a 700 triple grand touring that is being parted out on hardcoresledder.com. I think it is the same as the 800 single, and he only wants 75.00 for the pipe. Maybe Gus knows if the pipes are the same.

Todd

Just wondering why nobody has turboed a tripple i have a 809 and a spare s body chassis to put it in do they not work. Looking at a garrett 3071 to try it are there any advice ya or na.

 

[Team Voodoo]

FYI

There is a 700 triple grand touring that is being parted out on hardcoresledder.com. I think it is the same as the 800 single, and he only wants 75.00 for the pipe. Maybe Gus knows if the pipes are the same.

Todd

If it is the one your looking for be careful for rust under the heat shield. The last two pipes I bought used had pin holes under the heat shield from rust build up and thats a problem because the area is of the pin holes is weak and hard to repair. I would bet there is boosted sleds out there with pin holes leaking pipe pressure and losing hp. I scraped the pipes and bought a new one but you never know that one might be good.

Mike

 

[Tonysnoo]

Yes to the internal stinger sir, note the fuel pressure difference in response to throttle before and after the internal stinger reinstall... I'm curious how much faster it climbs not so much a total pressure change..Though I do expect one that will correlate to the 5-7 over figure for best overall performance...bet now its a little less /????

Gus

Hey Gus, funny you should mention the fuel pressure vs exh back pressure. I had to turn up the fuel reg after I took the stinger out. Before(with stinger) I was set at about 3psi and the fuel would be at 5psi by engagement and then follow the boost curve. Now I have to make about 3+psi boost before I get more fuel pressure. That's why I increased the initial pressure to 5. After 3 psi boost, then I get a typical increase in fuel pressure and boost. The total fuel pressure was about 14 before and now it's about 16. That seems to correspond with the initial setting increase. Evidently the turbo restriction is the final factor in back pressure.

That is one of the reasons I like my fuel pressure gauge the best. I monitor fuel, boost, and electical system all with one gauge. Love it!

 

[devilrmk]

That is one of the reasons I like my fuel pressure gauge the best. I monitor fuel, boost, and electical system all with one gauge. Love it!

I need to move my fuel pressure guage front and center for that reason.

Last ride I forgot to hook up the boost reference to the pipe so I ran for a few miles with no rising fuel pressure. Was just the trail so I didn't have boost held for very long. Had my powerjets way rich. It survived.

 

[extremedesigndave]

fuel lines

does anyone think that having the float bowls connected together could be screwing anything up?

 

[rsaint]

FYI

There is a 700 triple grand touring that is being parted out on hardcoresledder.com. I think it is the same as the 800 single, and he only wants 75.00 for the pipe. Maybe Gus knows if the pipes are the same.

Todd

It looks like the same pipe and i need a y pipe also but they are differnent.

 

[extremedesigndave]

boost ref

I need to move my fuel pressure guage front and center for that reason.

Last ride I forgot to hook up the boost reference to the pipe so I ran for a few miles with no rising fuel pressure. Was just the trail so I didn't have boost held for very long. Had my powerjets way rich. It survived.

what difference does having the boost ref line hooked to the exhaust pipe vs charge box?

 

[Tonysnoo]

what difference does having the boost ref line hooked to the exhaust pipe vs charge box?

The answer to that question is found earlier in this post, but long story short the pipe will typically give you a head start on building fuel pressure since it has 3-5 psi more back pressure than boost. Read back a bit....some very cool data.

Not sure about the bowl question. I was worried about that same thing so even though my bowls are at airbox pressure, I plumbed each carb to a common point in front of their respective bells so just incase one side of the box had a slightly different reference than the other(better flow or??).......not sure if its possible, but it was easy to drill two holes...LOL

 

[extremedesigndave]

i did look back

but there is so much info i thought it would be easier to ask

 

[heinracing]

going to start putting these babies on my turbos now

http://www.siliconeintakes.com/stpg.php?page_id=pre_intercooler_cooling_pipe&osCsid=a6dda6271abf57a15a1d7f6a14137eee

 

[gus bohne]

very nice idea..

For high boost its better to have more fuel pressure so using the pipe gives you another 5-7 psi ....allows lower static setting too,, 2-3 psi at idle.



Gus

 

[Tonysnoo]

but there is so much info i thought it would be easier to ask

Hey Dave, no easy way buddy.............ya gotta work for it.....LOL

Weld a # 4an fitting to your pipe center section and take a braided or steel line toward the fuel reg. You can transistion with regular hose for the last few inches. Very cool the way it works.

I think there is a pic of mine on page 5 or 6. Certainly not the only way, just the way I did it.

I also left a T on the circuit to try another theory Gus eluded to. Run the wastegate actuator off of that signal and you get less boost for say pump gas or?????

 

[Tonysnoo]

going to start putting these babies on my turbos now

http://www.siliconeintakes.com/stpg.php?page_id=pre_intercooler_cooling_pipe&osCsid=a6dda6271abf57a15a1d7f6a14137eee

Wouldn't it be cool if they did have fins along the inside too........bet it would work great!

Let us know if it really makes a diff. I have a temp probe in my airbox with the limit set at 200 and have yet to see it blink at me at 7 psi.

 

[extremedesigndave]

changed the fuel lines around

on the powerjets, having the floats ties together was making some wierd things happen! I need to put some checks in there

 

[heinracing]

Wouldn't it be cool if they did have fins along the inside too........bet it would work great!

Let us know if it really makes a diff. I have a temp probe in my airbox with the limit set at 200 and have yet to see it blink at me at 7 psi.

only thing i could see would be the fins would disrupt flow on the inside or cause a turbulance.




gus have you ever tried square piping for charge tubes?

in the race car world square tube headers create more hp because the flow is better as it causes a perfect flow.

Im going to build a square tube header for the apex and do some squre tubing into the airbox and put on dyno to see if there is a difference

 

[zrt1]

on the powerjets, having the floats ties together was making some wierd things happen! I need to put some checks in there

My power jet in the charge tube is tee'd into both float bowls and havent had a problem at all. I have one check valve up by the P.jet in the charge tube, just to keep the fuel a bit closer to the powerjet. Runns great. If you ever get up to rabbit ears ill let you ride it.

 

[extremedesigndave]

i will

But for some reason as soon as i changed it back it seemed to straighten out! i bought some check valves online that will be here by thursday and will tie them back together.

He Devil
How many turns are your fuel knobs out? not the air screws!

 

[devilrmk]

1/2 turn in from stock. I haven't begun to mess with them much yet.

Going to grind myself a reverse helix this week and try that.

On your float bowls being teed, if one were just a tiny bit higher than the other it would flow to the low one and the high one would keep filling until it floods like crazy... Like it was.

 

[gus bohne]

Never tried square tube, I'm curious ???

seems like it could work just as well on the intake tract, that would make fitment better too..

hummmm


Gus