Tow twin pics and questions

Off topic but are you ownly running one battary. I thought that the starter were 24 volt. sorry for the stuiped question. :bang
 
I run three batts in mine because ive got one of those 36volt starters.LOL













sorry couldn't help myself.
 
bsmith said:
congrats on getting it going! looks like you proved lots of people wrong, unless you drive pressure is sky high.


i wonder why my twins dont make that much boost.
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Your looking at this completely backwards, high boost is BAD. Boost is nothing more than a measure of restriction, and that much shows just how inefficient the truck is. You obviously already understand what drive pressures are and how nasty they can be, so I don't need to go to far into depth. Your set up is well balanced, and more efficient, that's why your number is lower. Even while flowing more air. I've seen a cam put into a 24v drop PSI between 5-10lbs, but the motor gained power.... Just because it was able to cycle all of that air through the motor with less restriction, the volume was the same, but PSI dropped. Make sense?
 
StainlessRRA said:
Your looking at this completely backwards, high boost is BAD. Boost is nothing more than a measure of restriction, and that much shows just how inefficient the truck is. You obviously already understand what drive pressures are and how nasty they can be, so I don't need to go to far into depth. Your set up is well balanced, and more efficient, that's why your number is lower. Even while flowing more air. I've seen a cam put into a 24v drop PSI between 5-10lbs, but the motor gained power.... Just because it was able to cycle all of that air through the motor with less restriction, the volume was the same, but PSI dropped. Make sense?
Click to expand...


yes, thank you for saying that, i had someone else tell me that but i wasnt sure.

i always hear of everyone running such high boost with twins, it just made me wonder about my setup.

im flying at only 40psi or so, thats why i havent asked too many questions just yet.

thanks
 
Twins will build more pressure than a single will efficiently...meaning, the single will build the same pressure, but will do it by heating the intake air farther.

I'm curious to see the drive pressure numbers on this setup.


BTW, Rollin Coal, why are you tired of answering the question about why you don't run an IC? At 80psi, with those twins, I'd also like to see your intake temps.
Chris
 
CAC's are for wimps.....
Real power is made with superhot air and tons of pressure.
 
Hey Rollin Coal , why don't you run an intercooler? Inquiring minds want to know? Two birds with one stone!!!:bang:bang
 
as far as the 80psi, that was PRE tuning, im setting in at a nice 60psi now, with about 25 out of the primary. I had to turn the drag comp down to level 2 to keep boost down. this is what i wanted out of these twins, and the truck is slightly (but noticeably) slower with egt's about 200* hotter.

if anyone wants to send me some money, ill put a drive pressure gauge on it.

as far as not running an intercooler, its a restriction, my egt's are well with in check, and i havent monitored IAT's with the twins yet, the single 66 IAT's were 140-150 in 60-70* weather at 60psi
 
Im very curious as I had this same idea months ago. Thinking it may be the ticket for my potential shorty build.

If it can get 1:1 drive and pressure readings, or even close Ill be sold on it.

What RPM do you get full boost?
 
Rollin Coal said:
as far as the 80psi, that was PRE tuning, im setting in at a nice 60psi now, with about 25 out of the primary. I had to turn the drag comp down to level 2 to keep boost down. this is what i wanted out of these twins, and the truck is slightly (but noticeably) slower with egt's about 200* hotter.

if anyone wants to send me some money, ill put a drive pressure gauge on it.

as far as not running an intercooler, its a restriction, my egt's are well with in check, and i havent monitored IAT's with the twins yet, the single 66 IAT's were 140-150 in 60-70* weather at 60psi
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You're still a jackazz LOL
 
i havent gotten the gauge on it yet, i havent driven the truck in about a week, we got some snow.

roachie, as soon as i get the gauge on there ill let you know, full boost is at like 1500-1800 rpm.

warpig, im always a jack ass, thats never going to change lol
 
I ordered a drive pressure gauge and some copper line, it'll be here tuesday, I'll get it installed as soon as i can and get some results.

hopefully i can get the water/meth working.

I also need to get an actual wastegate actuator on the secondary, the drive pressure spring kinda sucks.
 
ROLLIN COAL YOUR SET UP SOUNDS SICK! MUST TAKE OFF LIKE A ROCKET. :drive: CANT WAIT TO HEAR MORE RESULTS. :pop:
 
ok, i got the drive pressure gauge installed today, with very impressive results.

i have my edge set to level 1 now (low end fueling on 5) and holding at steady 60-61psi of boost measured at the grid heater spacer. 25-26psi measured at the primary turbos compressor outlet. Drive pressure was fluttering at 62-66psi (which i think is due to the stupid drive pressure spring wastegate on the hy35). But being ~6psi over boost im very very pleased.
 
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