Twin 67 5.3?'s
11-21-2012, 12:30 PM
#21
Car came on strong low but I would say full boost in the 4500+rpm range.
Above runs stopped due to lack of fuel @5800ish rpm(93 oct-12 degrees of timing-11.5psi-afr 205's-trak cam-stock 5.7 bottom end-fast 90)
Didn't DRAG/TRACK race this setup so couldn't give you a track opinion. Worked very well on the street though.
Above runs stopped due to lack of fuel @5800ish rpm(93 oct-12 degrees of timing-11.5psi-afr 205's-trak cam-stock 5.7 bottom end-fast 90)
Didn't DRAG/TRACK race this setup so couldn't give you a track opinion. Worked very well on the street though.
And you say it worked well on the street......compared to what? No offense, but that graph looks horrible."Full boost" is the entire amount of boost you have it set to, you did not reach it in the 4500 range because it was still rising past that. At 4500 you were at about 9si, which is not full boost.
Last edited by pwrtrip75; 11-21-2012 at 12:36 PM.
11-21-2012, 01:16 PM
#22
When I see a boost curve like that, typically, the compressor is oversized, or the turbine housing is too large.
More load, and itll come into boost quicker, so dyno vs street, are probably two different animals, but its not optimal, unless you plan to, again, spin big RPM.
More load, and itll come into boost quicker, so dyno vs street, are probably two different animals, but its not optimal, unless you plan to, again, spin big RPM.
11-21-2012, 03:53 PM
#26
So you never hit full boost until almost 6000rpms? And you say it worked well on the street......compared to what? No offense, but that graph looks horrible.
"Full boost" is the entire amount of boost you have it set to, you did not reach it in the 4500 range because it was still rising past that. At 4500 you were at about 9si, which is not full boost.
And you say it worked well on the street......compared to what? No offense, but that graph looks horrible."Full boost" is the entire amount of boost you have it set to, you did not reach it in the 4500 range because it was still rising past that. At 4500 you were at about 9si, which is not full boost.
It reached gate spring pressure at 4000 rpm. The rest was creep
Horrible looking or not, the car flat our performed on the street, and as mentioned, from a 35 MPH roll in 2nd gear it felt like it was going to slow the rotation of the earth, and this was on a 346 combo that was not 'designed' for boost (wrong cam, lol).
11-23-2012, 11:42 AM
#34
Yes it did. 3.42's on dyno... broke the diff on the street, had the 2.73 chunk laying around, swapped parts, made it work,...and honestly, really much more happy with the car with the 2.73 setup at least on the street I am. Long gears...lots of load and a lot less shifts.
