05 colorado SBE 6.0/C480/4l80e 9.78@143 foot brake 3850lbs
04-27-2016, 11:52 PM
#885
You can run that same Walbro 450 pump with a 20V Boost-A-Pump, that's the setup I'm running in my truck and there is more than 1 guy on here using that to over 750whp on E85. That doesn't solve your injector issue. The Colorado assembly is huge just like the 04+ 1/2 ton trucks and can easily hold a 2nd Walbro 450 if you decided to go dual pump, as I'm sure you saw. I'm certainly no one to give advice, I just noticed that E85 might have saved 2 of these motors?
04-28-2016, 08:41 PM
#888
Some of them are
<img src="http://i269.photobucket.com/albums/jj49/bakomack/51eec589.jpg" border="0" alt="Click the image to open in full size." class="post_inline_image tcattdimgresizer" onload="NcodeImageResizer.createOn(this);" title="Click the image to open in full size.">
I would guess denmah just has the reference line removed. So no vacuum or boost applied means 58psi all the time as measured at the rail.
And roughly 41psi delta across the injector with 17psi boost in the manifold.
<img src="http://i269.photobucket.com/albums/jj49/bakomack/51eec589.jpg" border="0" alt="Click the image to open in full size." class="post_inline_image tcattdimgresizer" onload="NcodeImageResizer.createOn(this);" title="Click the image to open in full size.">
I would guess denmah just has the reference line removed. So no vacuum or boost applied means 58psi all the time as measured at the rail.
And roughly 41psi delta across the injector with 17psi boost in the manifold.
04-29-2016, 08:49 AM
#892
first setup with 7875 was consistent flat boost, until i turned it up at the track and then it ran away and let go, that didnt happen on the road *traction and didnt happen on the dyno *not enough load im guessing
when i got the bigger turbo it would creep on the dyno 8-12 psi on the same 6lb spring
when i tried to turn it up, any amount of additional boost would make it runaway into boost cut, so it would just take off, and the gate wide open in the crossover wasnt enough to level it off
put the one in the turbine housing only and it can hold 6lbs with no creep
didnt really get to test it yet with the good tire at the track but i would like to add boost and see how it comes up and if its linear with just the one. i havent removed the other gate yet it is just pressurized from the top and holding itself shut basically, so if i need both its there.
04-29-2016, 09:11 AM
#893
Attachment 721576
i thought i had posted this already earlier in the thread but it is many pages
top is creep master gate in the crossiver only and bottom is highway pulls with WG in turbine only
i thought i had posted this already earlier in the thread but it is many pages
top is creep master gate in the crossiver only and bottom is highway pulls with WG in turbine only
04-29-2016, 09:30 AM
#894
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Based on your experience here, I'm ditching my single gate in the crossover idea for now. Looks to me like the required reversion on the passenger side exhaust just isn't reliable enough. I guess I'll just have an atmo dump WG off of a bend on the the up-pipe for now. It will have fantastic WG priority, so I think it will at least have solid boost control.
It's kind of handy that you knock out 4 or 5 setups in the time it takes me to build one... Lol
It's kind of handy that you knock out 4 or 5 setups in the time it takes me to build one... Lol
04-29-2016, 09:57 AM
#895
Based on your experience here, I'm ditching my single gate in the crossover idea for now. Looks to me like the required reversion on the passenger side exhaust just isn't reliable enough. I guess I'll just have an atmo dump WG off of a bend on the the up-pipe for now. It will have fantastic WG priority, so I think it will at least have solid boost control.
It's kind of handy that you knock out 4 or 5 setups in the time it takes me to build one... Lol
It's kind of handy that you knock out 4 or 5 setups in the time it takes me to build one... Lol
Putting it on the 90 at the cross over with a log setup is only going to vent half the banks properly and is pretty far from ideal.
I could make 8-26lbs easy with 1 44mm gate setup properly on a 5.3. That’s on an 8lb spring, I’m sure I could have made less with a lighter spring. I'm sure a 38mm gate would work just fine for most if setup correctly.
04-29-2016, 10:07 AM
#896
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That's almost exactly what I'm going to have now. It won't lend itself to recirculation with the other constraints of this car, but I guess I'll just go without that for now...
Just for the fun of it, I'm going to see if I can fit my eBay 60mm WG on it since I had a new valve guide installed in it by the local sprint car engine shop. It functions quite smoothly now, and it doesn't exhaust the diaphragm pressure so fast anymore. Still doesn't work as nicely as a Tial, but I think it's workable now and I want to find out. Or I could put my Tial 38 on there if I run into too big of space constraints, and I agree that it will probably work. But what fun would that be? Lol
Just for the fun of it, I'm going to see if I can fit my eBay 60mm WG on it since I had a new valve guide installed in it by the local sprint car engine shop. It functions quite smoothly now, and it doesn't exhaust the diaphragm pressure so fast anymore. Still doesn't work as nicely as a Tial, but I think it's workable now and I want to find out. Or I could put my Tial 38 on there if I run into too big of space constraints, and I agree that it will probably work. But what fun would that be? Lol
