Finally dyno'ed my KA

[AceInHole]

Went to the dyno today to see how much power I can make with a leaky manifold, crush bent downpipe, and tiny turbo with a "bandaid" (hacked MAF) fuel setup.

1st run:
6psi, 200 rwhp, 224 rwtq

10th run:
8psi, 220.5 rwhp, 251.2 rwtq

Both figures SAE corrected (.93 correction, so actual power was 7% higher, or about 14 more rwhp).

Chart can be found here:
http://www.engr.uconn.edu/~corrales/carsIM/dec2dyno_sm.jpg

Air/ fuel followed the same curve for both charts. Started at about 13, then dipped to high 11's, then to high 12's. Pretty safe, but with future tuning I'll set it straighter. My sparkplugs were also pretty old. Should've picked up a new set before dyno'ing (had just done 2 600 mile trips back to back with them, in addition to a couple months on them daily driving). Supposedly that's one reason the graph is so rough (although smoothing was set to "none" on the dynojet software).

My numbers are low, mostly because boost was trailing off (leaking exhaust manifold and a crush bent downpipe will do that for you). Hopefully both will be fixed before the next dyno session. The entire setup might be changed over winter anyways (something ball bearing.... decently sized..... enough flow to barely make 350rwhp). Also working on getting a new engine management system through the place I dyno'ed at (Bristol Dyno in Bristol, CT... by far the cheapest and friendliest dynojet in New England).

Anyways... I'm happy with it. The best part about the setup is the response, and I wish I had a video of the boost gauge as it rose through the dyno. It's even better when the exhaust manifold isn't leaking (damn I need to learn how to weld better). Very linear power, and a whole lot of it from mid to high RPM's (well, relatively high for the truck motor). From 4000 to redline i'm at about or above 200rwhp.


So... next up: new downpipe, re-weld the manifold's collector where it leaks, and maybe a 248deg intake cam rotated 8deg for less overlap. Hoping to make it to 240rwhp at a constant 8psi (instead of 8psi dropping) and maybe do a 10psi run to break 250rwhp before winter comes and I start thinking of bigger/ better things...... (my friend owes me some double cheeseburgers if I break 240 with my small TD05 turbo).

For now... this is the first step to catching the damn 400rwhp supercharged M3's.

[Sway500]

Those are great numbers for your set up. It has higher numbers than people who buy $3g turbo kits. Nice work.

[adey]

Good deal!!
I forget how I make do on my stock KA's 120 or so WHP... I took my GTi (~180whp) up to the canyons the other day and it's soooo much more satisfying pulling out of corners with the ~200wtq than with the ~115wtq of the 240. :bash:

nice numbers. :cool:

[AceInHole]

The numbers aren't bad considering how small my turbo is.... although I'd like to try to get as much power as I can without having to both turn the boost up or go to a larger turbo, both of which would add to lag time.

In theory, as long as I can make up for the inefficiency of the turbo with the intercooler, even my small turbo should be able to make as much power as my friend's larger turbo. I'm about 20rwhp away from proving it. Just need to fix the problems that could be sucking power out.....

Although.... a portion of my dyno slightly resembles a supercharger's dyno (pretty much straight). Fixing the problems should get it even closer to linear.

[rancid240]

whats your setup?

[Startours7]

Originally posted by adey
Good deal!!
I forget how I make do on my stock KA's 120 or so WHP... I took my GTi (~180whp) up to the canyons the other day and it's soooo much more satisfying pulling out of corners with the ~200wtq than with the ~115wtq of the 240. :bash:

nice numbers. :cool:


GTi's are the shit. I was looking for one for a long time before I got my 240.

If the 240 has more tq then horsepower at the crank wouldn't it be true for the wheels as well.

[AceInHole]

1997 KA24DE w/ 44k miles
Volvo TD05-12B turbo (mitsubishi TD05 style with T3 style flanges)
Leaky log- manifold
Crush bent 2.5" downpipe
Random Tech 2.5" cat
Greddy DD exhaust
NPR FMIC
370cc injectors
hacked MAF
Apex'i S-AFC
240/ 248 S13 cams
DSM 1G BOV

[HaLo]

That's pretty good Ace!! I remember when I was reading you making that turbo setup. You're getting impressive numbers for the amount invested compared to a 3000$ turbo kit!

[AceInHole]

Originally posted by Startours7
If the 240 has more tq then horsepower at the crank wouldn't it be true for the wheels as well.

Yes. Both hp and tq suffer the same driveline loss percentage.

That's pretty good Ace!! I remember when I was reading you making that turbo setup. You're getting impressive numbers for the amount invested compared to a 3000$ turbo kit!

I'm happy with the general curve of the chart.... I'd just like a little more power without having to crank the boost up. When you come down here to autocross you've gotta take my car for a spin..... :p

[ryan hagen]

what is that hacked maf? like what do you do to it?, im startingmy buid up, accumulateing parts now to get the motor built this spring......

[HaLo]

Originally posted by AceInHole
I'm happy with the general curve of the chart.... I'd just like a little more power without having to crank the boost up. When you come down here to autocross you've gotta take my car for a spin..... :p

I'd love too! Must be much more torquy than the SR. A different feeling I guess.. :)

I like the fact that at 3.5k, you're almost at peak torque and hp and it stays pretty stable up to redline.

[95Blue240sx]

Originally posted by ryan hagen
what is that hacked maf? like what do you do to it?, im startingmy buid up, accumulateing parts now to get the motor built this spring......

search my friend. check out PJ's website(his sig pic) and maeda's website, both will help you out. some great info on both sites. using the search helps to refine everything.

good stuff Ace! im waitng for more!

[DaveSev]

<3 your car, the rims look damned nice too. How much have you put into it?

[AceInHole]

Originally posted by 95Blue240sx
search my friend. check out PJ's website(his sig pic) and maeda's website, both will help you out. some great info on both sites. using the search helps to refine everything.

good stuff Ace! im waitng for more!

uhh... my site is down and under reconstruction.

too bad www.ka24developement.com (orion's site) seems to be gone....

do searches here and on FA though and a ton of info comes up.

<3 your car, the rims look damned nice too. How much have you put into it?
lol.. the rims in my sig are 1994 mustang GT rims with some crappy paint :p got those for $100.
as for how much i put into my car? hmm.... just about every penny i've got (had) :p
turbo was something like $2000 including a new engine (1997 engine with 27k miles for $700). my setup isn't the cheapest, but it serves its purpose and has been decently reliable when not subjected to stupid moves by the owner :doh:

[ryan hagen]

only threads i found were both with you in them, but i still dont understand. right now i want to run 300-350 hp,
550cc injectors, good size intercooler, 8.5:1 compression pistons,
pdm cams, mild porting, thats what i paln on doing

i have a n/a 300zx maf that i picked up from a friend,

going off this can a hacked maf help me? or should i got with a jwt?

as far as i understand i would take the electronics form a stock ka maf and put them inot a larger pipe. and the pipe has something to do with injector size? that waht i picked up from the other post but i still dont quite understand it?

[AceInHole]

going above 300rwhp, i'd suggest getting a JWT ECU or a standalone (or some combination of piggyback computers). beyond around say 250rwhp you're gambling with the stock timing map in addition to pushing the limits of pretty much any other fuel control.

hacked MAF has taken Orion to around 250rwhp and I don't think he's planning on going further. If I get lucky I might try for 280 or even push for 300 with the next turbo i'm getting.... although I'd have to recommend against it without a JWT or other such electronics.

[Bbandit]

awesome numbers man!!

here you are making this kind of power and me... hmmm... i havent even started yet... oh well:(

[TUnity2]

WOW, all thats power from a teany, tiny 12b w/ a custom set up. you gotta nice setup ace, just watch them head gaskets when the boost goes up.

[AceInHole]

Not really planning on going above 12 - 14psi. Gonna try to make 300 - 350hp on either a GT28 or GT30 (i'd rather use the 28) within that boost range. After that, power is pretty useless if it isn't responsive and linear (lag and peaky power would hurt me more than more raw power). My car is an autocross car first, then daily driver.

As long as your small turbo can make the boost, it'll make the power. The only reason a smaller turbo wouldn't make as much power is it's efficiency. Make up for that with a good intercooler (like a nice ice-water/ air intercooler like Mark Daddio [won the mazdaspeed challenge] or a huge faced FMIC) and you've got quick spool, linear power, and a decent amount of it.