Some dyno numbers from GroundZero's turbo kit
Originally Posted by red90cobra
not bad at all. that' graph and the info dont match. what's the deal with that.
Nice numbers btw!
Originally Posted by GroundZero
First of all, there is still lots of tuning to do. We ran out of fuel pressure so we had to stop until we get it fixed. This was on 9psi with very conservative timing w/ full exhaust. Engine is 100% stock besides upgraded injectors. Full boost came in at right around 3K running strait off the spring so power can definitely be improved in mid range. Just by looking at the charts, we'll be able to get at least 550rwhp just with some tuning and rpm's. We actually got 549rwtq@ 4000rpms on another run, still with 9psi. We should be able to see 550hp/550tq at 9psi after we get the fuel pressure back up
BTW, the kit that is on the car is the base kit which is a T70. Also we had boost dropping off after 4500rpms which is why you see torque dropping like that.
Be back soon with some more numbers
BTW, the kit that is on the car is the base kit which is a T70. Also we had boost dropping off after 4500rpms which is why you see torque dropping like that.
Be back soon with some more numbers
Now, I am talking about the graph, not the numbers you guys said you got, purely based on looking at the graph.
Originally Posted by RealQuick
Whats the deal with peak torque being at 4600rpm? Talk about lag...and on a mustang dyno to boot. It would be about 5000-5200rpm on a dynojet, similar to the sts.
Now, I am talking about the graph, not the numbers you guys said you got, purely based on looking at the graph.
Now, I am talking about the graph, not the numbers you guys said you got, purely based on looking at the graph.
I agree, thats an awful amount of lag for a T70. A true T70 will spool below 3500-3800 espeically on a load dyno. What A/R does this turbo have???
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TECH Addict
Joined: Nov 2001
Posts: 2,659
Likes: 1
From: Bellevue, Wa
so it sounds like you guys are correlating when the turbo hits full spool with peak tq?
is that accurate? I have never heard of such a correlation, but I am fairly new to turbos.
please enlighten.
is that accurate? I have never heard of such a correlation, but I am fairly new to turbos.
please enlighten.
Teching In
Joined: Dec 2004
Posts: 9
Likes: 0
We are going to install a electronic boost controller in a couple of days to get the
graudual boost increase off the spring and controlled by a good controller. We have an AVCR boost controller to try, which should really give us some control, even boost per gear. Ralph
graudual boost increase off the spring and controlled by a good controller. We have an AVCR boost controller to try, which should really give us some control, even boost per gear. Ralph
A bit of advice on the fuel setup, you are only hindering fuel delivery with an inline pump at the levels you are trying to obtain. Do not run an inline pump. Take the time to build a good, dual in-tank, or good external setup capable of delivering adequate fuel. Otherwise you will just melt down that motor. Been there....done that....a few times 
Teching In
Joined: Dec 2004
Posts: 9
Likes: 0
We are going to try a good intank pump and set boost to match fuel delivery. We are running 60lb motrons and are trying to establish a good and easy stock kit that people can have fun with a reasonable boost level like 6-8psi?. The inline was to determine if the intank good enough for a little more boost but it wasnt, it restricts to much.
We are trying to come up with a fairly easy install for people at home. Also I dont know about fuel across the US but ours is really bad, super unleaded. We can only run about 3-5 degrees of timing @2200rpms-3200 and aprox11.5AFR with out knock, so the spool is a little lazy.
turbo doesnt spool as fast as it could.
We are trying to come up with a fairly easy install for people at home. Also I dont know about fuel across the US but ours is really bad, super unleaded. We can only run about 3-5 degrees of timing @2200rpms-3200 and aprox11.5AFR with out knock, so the spool is a little lazy.
turbo doesnt spool as fast as it could.
Launching!
Joined: Dec 2001
Posts: 289
Likes: 0
From: Wallingford, CT
Originally Posted by JZ 97 SS 1500
That is always the case......
Peak Tq = Peak boost
Peak Tq = Peak boost
I have full boost by 2,400, and its constant to redline. My peak torque is just like these guys got...4,700 or so. Does this mean I should have peak tq at 2,400, and hold the peak until redline?
What about a supercharged car? Peak boost is only at redline. Peak tq is not.
I'm not getting it.
On a turbo car is where this applies. As for the street and the dyno....2 different things. Most dynos can not load a turbo car properly even on a mustang dyno. If you could duplicate the results from the street on the dyno your graph would look different. My supra doesn't hit peak torque till 5200rpm on the dyno. On the street I have full boost by 4500, and it doesn't require me running the boost controller wide open to ahcieve the boost I want either.
Originally Posted by JZ 97 SS 1500
On a turbo car is where this applies. As for the street and the dyno....2 different things. Most dynos can not load a turbo car properly even on a mustang dyno. If you could duplicate the results from the street on the dyno your graph would look different. My supra doesn't hit peak torque till 5200rpm on the dyno. On the street I have full boost by 4500, and it doesn't require me running the boost controller wide open to ahcieve the boost I want either.
Correct this is the same theory as running a 6 spd car and flooring it in all 6 gears from a low rpm point. You will notice that boost comes on sooner as you progress in the gears....ala load.
Great numbers guys! Some advice on the AVCR Apexi.....throw it away and start with a reliable controller. I've gone through two of them. Easy to program, but not reliable. Wait until you feel the heat from the controller....display gets hot and does funky things to the electronics over time. Mine even started copying the A program over to the B program when it got hot.
Turbosmart seems promising.
Turbosmart seems promising.