high hp auto guys inside please...
high hp auto guys inside please... I took my car to a dynojet dyno this weekend and started tuning for power. The set up is as follows:
408, eagle crank, callies rods, weisco 32 cc dish pistons
completely stock 317 casting with dual springs
244-446 .630 .630 115 lsa cam
Gmpp intake manifold with 105 mm tb
t4 percision 88
truck manifold kit 4 inch downpipe
air to air intercooler
tial wg and bov
I am using hp tuner 3 bar, with 160 lb injectors, and driver box for them, and dual intakes for fuel. I am having some problem with everything but wot fueling but I will save that for another thread, lol.
The car is doing several things that are confusing me, and I wanted some opinions. It made 720 rwhp on 14 psi, then a peak of 850wrhp at 20 psi. The dyno runs at 20 psi seems very very short and the car is still building boost. It barely hit the 20 psi mark just at the rev limiter, my dyno graph looks like that of a supercharged car it makes peack hp at peak rpm.
I am thinking with a 400 and converter that the dynojet just isnt enough to load the car, and because of this it spools late, and the dyno pull is very short. Maybe even that the car is pushing through the converter mixed with it being on a dyno jet.
My options are to either strap it onto a mustang dyno and see what it does, or take it to the track and see what it does there.
I would also like any input on the power that it is making, and the dyno situation. I guess the power is close to what I was thinking, but I was going to try more boost for the racegas final number.
408, eagle crank, callies rods, weisco 32 cc dish pistons
completely stock 317 casting with dual springs
244-446 .630 .630 115 lsa cam
Gmpp intake manifold with 105 mm tb
t4 percision 88
truck manifold kit 4 inch downpipe
air to air intercooler
tial wg and bov
I am using hp tuner 3 bar, with 160 lb injectors, and driver box for them, and dual intakes for fuel. I am having some problem with everything but wot fueling but I will save that for another thread, lol.
The car is doing several things that are confusing me, and I wanted some opinions. It made 720 rwhp on 14 psi, then a peak of 850wrhp at 20 psi. The dyno runs at 20 psi seems very very short and the car is still building boost. It barely hit the 20 psi mark just at the rev limiter, my dyno graph looks like that of a supercharged car it makes peack hp at peak rpm.
I am thinking with a 400 and converter that the dynojet just isnt enough to load the car, and because of this it spools late, and the dyno pull is very short. Maybe even that the car is pushing through the converter mixed with it being on a dyno jet.
My options are to either strap it onto a mustang dyno and see what it does, or take it to the track and see what it does there.
I would also like any input on the power that it is making, and the dyno situation. I guess the power is close to what I was thinking, but I was going to try more boost for the racegas final number.
Originally Posted by black98ws6ta
take it to the track and see what it does there.
Originally Posted by y2khawk
We haven't put a "high hp" turbo car on the rollers in years. Engine dyno and/or track tuning only.
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Verdad Gallardo I've only ever used an eddy current dyno (mustang) for my turbo stuff. The one time i had my car on a dynojet just for fun (still a 6 speed at the time) it had trouble building boost early. So much so i tweaked the controller to fill in the curve, hit the street and saw 3 psi more peak that before.
Not to mention we could never keep my tires from spinning on the rolls, slicks or radials, people in the back or not. It got to the point the whole deal would freak me out
Then again, this is all in the 1k+ rwhp range.
Have you had it on the street at all? Is the boost rise more indicative of a turbo then?
Not to mention we could never keep my tires from spinning on the rolls, slicks or radials, people in the back or not. It got to the point the whole deal would freak me out
Then again, this is all in the 1k+ rwhp range.Have you had it on the street at all? Is the boost rise more indicative of a turbo then?
Originally Posted by y2khawk
I've only ever used an eddy current dyno (mustang) for my turbo stuff. The one time i had my car on a dynojet just for fun (still a 6 speed at the time) it had trouble building boost early. So much so i tweaked the controller to fill in the curve, hit the street and saw 3 psi more peak that before.
Not to mention we could never keep my tires from spinning on the rolls, slicks or radials, people in the back or not. It got to the point the whole deal would freak me out Then again, this is all in the 1k+ rwhp range.
Have you had it on the street at all? Is the boost rise more indicative of a turbo then?
Not to mention we could never keep my tires from spinning on the rolls, slicks or radials, people in the back or not. It got to the point the whole deal would freak me out
Then again, this is all in the 1k+ rwhp range.Have you had it on the street at all? Is the boost rise more indicative of a turbo then?
Yes, I should have mentioned that. It sent me sideway from a 3rd qear roll very quickly. I am just looking for some reassurance, I know things will be fine when it sees a mustang dyno/track.
Its not that it doesn't build boost quickly on the dyno either....just the dyno beats the turbo to the end, lol.
Dont know why this one didnt turn out good, but the torque it makes looks better then the higher hp graphs
Another shot of that same graph....
This one has a/f.
This one is versus speed. I think the data is skewed because the car never seen above 7,000 rpm and the dyno sheet shows higher. Can anyone make any sence of this?
Last edited by black98ws6ta; Sep 12, 2006 at 06:50 PM.
You need to throw a load on that thing. Your turbo will make more boost quicker if you have more load on the vehicle. Not to mention that cam your running probably isnt waking up until about 4k rpm
After looking over the graphs, it seems to me the converter is slippin badly. Both at 721 it goes 115 mph and 841 rwhp the car only goes 107 mph. This is with a th400 in 3rd gear, 4.10 gear, and 28x10.5 w's. By my calculation with no converter slip it should go 142 mph at 7 k and 132 mph at 6k, and the dyno rpm is obviously off from that of my cars tach.
TECH Addict
Joined: Jul 2005
Posts: 2,153
Likes: 3
What size converter do you have? I was running a 9.5", but we could never get it tight enough. I'm switching to a 10.5" to get more holding power. My combo isn't nearly as stout as yours, so I would imagine a 9.5" is out of the question for you.
Mike
Mike
DynoJets + unlocked TC's = screwed rpm. I had my rev limiter set at 6500 and the DJ showed 7200rpm. I just scale my rpm to "actual".
What rpm on the tach did you hit the gas?
What rpm on the tach did you hit the gas?
Originally Posted by Got Me SOM
car sounds like it will be a beast when its all sorted out. good luck..
no problems with heads lifting ?
no problems with heads lifting ?
Originally Posted by longrange4u
Am I the only one that thinks 160lb injectors are too much for a 88mm turbo?
Originally Posted by engineermike
What size converter do you have? I was running a 9.5", but we could never get it tight enough. I'm switching to a 10.5" to get more holding power. My combo isn't nearly as stout as yours, so I would imagine a 9.5" is out of the question for you.
Mike
Mike
Originally Posted by onfire
DynoJets + unlocked TC's = screwed rpm. I had my rev limiter set at 6500 and the DJ showed 7200rpm. I just scale my rpm to "actual".
What rpm on the tach did you hit the gas?
What rpm on the tach did you hit the gas?
Last edited by black98ws6ta; Sep 12, 2006 at 09:45 PM.