My customer B.'s dyno tune (long)

[RETed]

I've been working on this customer's FC for a few months now, and we finally got the car on the dyno to tune...

Dyno is a Dynapack.
(I normally use a 8% difference between DynoJet #'s.)

Kouki FC (originally non-turbo) converted to full turbo drivetrain
Rebuilt and ported 13BT
Garrett 60-1, O-trim 0.96 A/R (yeah, small, but we got it at a good price)
HKS cast turbo exhaust manifold
Tial (44mm?) wastegate
Custom 3" exhaust
eBay 24" x 12" x 3" FMIC
Haltech E8
Mallory HyFire 6A on leadings
NGK BUR9EQ's in all 4 corners





Car initially put down 267 on the initial tune at 12psi.
(See lower lines on the pic.)
This was done on 87 octane!
(Car started to misfire after trying to lean it further than the current fuel maps.)
This was done on the unmolested wastegate spring (although Tial rated the spring boost pressure @ 10psi; Dynapack actually showed 11.5psi).
Notice how flat the torque graph is all the way to the 7k RPM redline!

When we got the car back on the dyno the other day, we had confirmed we had 92 octane gasoline in the tank...
I asked for a baseline run just to see what the car would do.
Although I don't have that run in the pic, it peaked at 282hp!
No changes on the Haltech - it picked up *15* hp, from 267.
WOW.

The owner had installed an A'PEXi AVC-R, so we started to crank the boost up...
We set the EBC to 15psi...
We broke 300hp - 302 was the actual number, I believe.

We then cranked the boost up to 18psi - about the limit I'm comfortable with on 92 octane pump gasoline.
That's the 321 lines in the graph.

In the end, we gained 50+ hp and 50+ lb./ft tuning from 12psi to 18psi.

My goals with this set-up was 300hp @ 15psi and 350hp @ 18psi.
That's DynoJet #'s (which I am more familiar with), so @ 15psi was easily beat it.
@ 18psi, it was dead on -> 321 + 8% = 346, DynoJet adjusted
@ 15psi, 302 + 8% = 326, DynoJet adjusted

I knew the O-trim turbine was going to choke the power a little, but I was pleasantly surprised how well it produced @ 12psi!
The other surprise was the 15hp gain from just the octane change!


-Ted

[RotorDad]

Nice work Ted I'm sure the customer was happy with the results.

[RETed]

Yeah, he couldn't stop smiling!

We were having problems trying to get time to street tune the set-up.
Lots of rain + end of month meant lots of cops on the street.
Although I normally dyno tune *after* doing a good street tune, the opportunity opened up to get the car on the dyno.

The very first run (I always do a baseline), the car put down a paltry 211 at the wheels on the Dynapack.
The car was quick, but it was lacking the punch that the big single turbo was supposed to produce.

The first dyno session netting a gain from 211 to 267.
The car was a handful for the owner after that significant gain in power.
I let him drive the car around for almost a month before this second dyno session, in which we bumped the boost up.
He took the car after the tune down the street for a quick run, and he said it was scary fast...
300+ at the wheels will tend to do that to you after driving the car for months just barely over 200.

I'll try and get pics of the car soon.


-Ted

[RotorDad]

Originally Posted by RETed

Yeah, he couldn't stop smiling!

He took the car after the tune down the street for a quick run, and he said it was scary fast...
300+ at the wheels will tend to do that to you after driving the car for months just barely over 200.


-Ted

Yeah I bet, it's like a totally different car.

[j9fd3s]

yes, 211 to 311 is like going plaid!

i'm amazed that the smaller turbine wheel actually makes such a flat tq curve, that @250-300hp is gonna be really fun on the street

mike