Finally getting the twins going..

[Tacoclaw]

'94 up trucks.

They made trucks after '93?

[PToombs]

'94 up trucks.

They made trucks after '93?

Not good ones!

[Stomp]

That hood is gona be cool, and i agree with every one i think your truck has alot more
HP in it and still be drivable, you should be able to run a low 13 i would think.

Agree on the power lvl. Just learning to drive with twins is quit an adjustment in itself. Twice now I have lifted to fast and blown air into my injectors. Engine shuts off
right now when this happens. One time it happened when I was merging onto the freeway and I had to pull off to the side of the freeway to bleed the injectors. The first time I
was in a little acceleration race with a FURD and let up to fast. I just to the next exit and came to a slow stop on the side of the road.

I was surprized at the following. Last year my best with just my S300 and current fueling I did a best run of 16.48 in the 1/4 mile. This year with a little wind on the back side I ran
a 14.13 with no fueling changes. My pump has lots of turns left in the pump. I know 13's are not going to be a problem at all. I have to start looking for a new drivers jacket already have
a helmet as I need both to run 13.99 or quicker..

Wait a second I Have never heard of this happening with the injectors? I am not saying that it couldn’t happen. When mine kept stalling on the dyno it was because I was running out of fuel in the pump. What are you running as far as a lift pump? 10psi should be sufficient, but I still think something else is going on. I just don’t know what it could be.

Hey the twins look sweet you did a nice job building them. Congrats on the new numbers.

Stomp

[SNOOT]

Look who dropped in... Its been years since we have crossed paths old friend.

Stomp

I dont know the true reason for what its doing. I can run the entire 1/4 mile just fine now but if I let out to fast it just dies. I have to bleed the injectors to get it running again.

It did do this a little bit after a hard run before but adding the twins just kills it if I let out to fast now. I was aware that this would happen but it sure tests you when it happens on the freeway.

Any chance you have any test pumps you wana send north?

[BC847]

I dont know the true reason for what its doing. I can run the entire 1/4 mile just fine now but if I let out to fast it just dies. I have to bleed the injectors to get it running again.

It did do this a little bit after a hard run before but adding the twins just kills it if I let out to fast now. I was aware that this would happen but it sure tests you when it happens on the freeway

What are you using for a fuel pick-up in the tank?

Doing nothing . . . . with less than a half tank of fuel, launching hard enough has all the fuel go to the back of not only the tank, but in the fuel pick-up canister itself. Thus, you suck air. And in the short time it takes to make the pass, the air is just getting in the IP when you let off of it.

To test this, next time you're at the track, make a pass with 3/4ths of a tank (so as to ensure the fuel pick-up assembly is fully submerged at launch).

One way or another, there's a good chance you're throwing the fuel around enough to pick up some air.


I've modified the crap out of my OEM fuel pick-up assembly.
- Drilled passageways and 3/8" ID plumbing.
- Lift pump at the tank.
- The return line plays into the pick-up housing (so as to keep it full, see next mod). You'll need to mod the return pipe in the housing so it doesn't aerate the fuel in the canister as well.
- I put a lid on the lower portion of the housing so as to keep the fuel from climbing the rear wall (while launching hard) and spilling out the top. I drilled an overflow port in the forward edge of the lid.

As such, it appears to work well with approx 5 gallons of fuel in the tank and a 2 second 60'.

With a 1.8 second 60', . . . not so much. It's iffy. I'm planning on filling the housing with some of the fuel foam (open cell diesel rated foam material) to further reduce slosh on launch.


Been there, done that! (Or it's just been my experience). . . . . .

[Stomp]

Look who dropped in... Its been years since we have crossed paths old friend.

Stomp

I dont know the true reason for what its doing. I can run the entire 1/4 mile just fine now but if I let out to fast it just dies. I have to bleed the injectors to get it running again.

It did do this a little bit after a hard run before but adding the twins just kills it if I let out to fast now. I was aware that this would happen but it sure tests you when it happens on the freeway.

Any chance you have any test pumps you wana send north?

I like BC’s explanation he might be on to something. Test pumps huh? Well I have one sitting in a box right now with a 14mm H/R, but the problem is that is the only thing in the pump that I own. It’s my buddy’s pump. I would have to make some phone calls to see if I could send it your way. I also have a 12mm pump that flowed more fuel than any other 12mm pump that I have put on the test stand. The only problem is it is currently undergoing some testing on one of my buddy’s pickups in Texas.

What kind of supply pump are you running? Have you dynoed your current set up? Would you be able to dyno if I had the chance to send you a pump?

Stomp

[swank]

Twice now I have lifted to fast and blown air into my injectors. Engine shuts off
right now when this happens.

First time that happened to me was on the dyno. Just about pooped. Hard run, 1350*, 3400 rpm, to what I thought was a seized engine. This is the first I've heard a description of what happened. I just figured there was too much fuel or something and it put it out. This makes a lot more sense though.

I'm going to have to redact my statement here that this makes sense. I'm not sure that even 80 psi of boost would be able to reverse the flow fuel past those springs in the injector that should be set to move at ~260 BAR. As far as having it happen while moving, that is one thing. I had it happen a couple times on the dyno though, so I'm going to say that slosh was not playing a role. Always had plenty of fuel pressure too.

[SNOOT]

I dont know really what cause is but it un-nerving when it happens.

[swank]

agreed!

[JBradley500]

hey snoot, when are you going to put this big rig on the dyno?

[SNOOT]

hey snoot, when are you going to put this big rig on the dyno?

I would have gone to BD this weekend but I was away all week in Houston and the family needed some hugs. We all went to the Tug boat races Saturday on the Seattle waterfront. The next local event I will be there.

Also I felt bad the last three BD events I have won the trophy. There is another 1ST Gen guy there that deserved it. I am going back in the fall to claim it.

Here are my photos from the Tug Boat event.

http://picasaweb.google.com/lance.egger ... 1819831602

http://picasaweb.google.com/lance.egger ... 1005962610

[Richie O]

I assume the newer tugs are Voith Schneider driven?? Pretty cool.

[Remps]

Is there a chance air is getting into the pump through the rubber AFC cone thingy from high boost pressure? Is that even possible? The rubber might only hold 40 psi and you'd still get full fuel with a factory spring. Just guessin, seems like more boost made it worse. It would be easy to pressure test the AFC.

[hickracetruck]

Thats good thinkin! Could be a tiny pinhole or seal leak on that rubber diaghram. Once you get high boost that hole gets bigger and lets in some air or air forces itself under the diaghram since they only took 30#s stock.

[coolhand_luke]

where did you buy your turbos from?