1990 NA6 Kraken Turbo - Less power than expected
#1
1990 NA6 Kraken Turbo - Less power than expected
Hi everyone, first post here. I recently went turbo on my 1990 SNC NA6 with a Kraken 2560 kit. Running 6 PSI on CA 91octane fuel, I’m a bit underwhelmed by the power numbers. The torque graph isn’t zeroed properly, but the power graph is accurate. I’m a bit confused as to why I didn’t make more power. I expected roughly 150 whp.
Setup at time of dyno was:
My tune is attached.
My tuner, Jei at Blacktrax, mentioned issues with heat, so I think the spark map may be conservative? I am not sure though since I am new to tuning. We weren’t getting any misfiring or spark blowout. Jei suspected excessive exhaust back pressure or crank case pressure. What do you guys think my problem could be?
I recently installed:
I’m planning to go to the dyno again on 7/6 to turn up the boost. Anything else I should do to ensure max power? Thanks in advance!
Setup at time of dyno was:
- SpeedyEFI ECU
- Kraken top mount manifold
- GT2560R
- Kraken 3” Turboback exhaust w straight resonator and muffler
- 7” Intercooler w 2” hot side piping, 2.5” cool side piping
- Turbosmart Kompact BOV
- 700cc Bosch Injectors from Kraken
- ACT Stage 1 Clutch and Lightweight Flywheel
- 6 Speed from NB2 (pulls done in 5th gear)
- 4.3 Torsen
- AEM X-Series Wideband
- Stock internals
- Stock PCV w hot side port vented to atm
- Stock cooling system
- 6 psi wastegate actuator, no boost control
- NGK BKR7E gapped to .030”
My tune is attached.
My tuner, Jei at Blacktrax, mentioned issues with heat, so I think the spark map may be conservative? I am not sure though since I am new to tuning. We weren’t getting any misfiring or spark blowout. Jei suspected excessive exhaust back pressure or crank case pressure. What do you guys think my problem could be?
I recently installed:
- dual catch cans
- 323GTX PCV valve
- MAC boost solenoid
- Supermiata radiator and coolant reroute
I’m planning to go to the dyno again on 7/6 to turn up the boost. Anything else I should do to ensure max power? Thanks in advance!
#8
The 3-bolt compressor housing outlet and adapter make the silicone elbow sit too high. The only solution I had was to cut it. I think even with it cut, it still gets smushed by the hood a bit…
I think anybody with an NA who orders a kraken kit needs to specifically request the circular compressor outlet to avoid this issue. I didn’t know.
So you think the intake tubing is too restrictive there? I was hoping that wasn’t it because fixing it would be laborious.
#18
Edit - re-looked at figures. Say 136hp@ hubs = estimated c.152bhp at fly. 152/(14.5+6)*14.5 = c.108 hp fly NA equivalent. Don't know what yours would book at standard. Potentially a little low.
Last edited by Mr Plow; 07-04-2023 at 06:28 AM.
Thread
Thread Starter
Forum
Replies
Last Post
F20turbo
DIY Turbo Discussion
21
12-15-2006 01:14 PM