8V ABA/Counterflow Hybrid Jetta
8V ABA/Counterflow Hybrid Jetta
Heavily worked 1.8L Counterflow head w/ TT 276* camshaft
Mustang TB/tps and an adapter plate
19# VR6 VW injectors
MS1 V2.2 MSnS
Bosch External Ignition Control w/ MSD Blaster Coil
Re: 8V ABA/Counterflow Hybrid Jetta
Decent daily drivability, aside from the cold starts. No idle control so, it's choppy untill i hit 130*. ~25mpg mixed highway and town driving. Sparkmap is still unchanged. Haven't ventured into that tuning area yet, still trying to get fuel where i want it.
The motor has had a few changes since the last post; the updated specs are:
Camshaft retarded to a total of 6* (was 2*)
24# Bosch Injectors (Blue tops)
Running on the attached MSQ file at the moment.
Re: 8V ABA/Counterflow Hybrid Jetta
Re: 8V ABA/Counterflow Hybrid Jetta
Re: 8V ABA/Counterflow Hybrid Jetta
Leaned out to 17-18:1 in light throttle cruise on the highway at RPM's under 4k. Starts richening back up to 14-13:1 above 4k RPM. Smoothed out peaks in ignition table, and set 35*adv. in same light cruise conditions as stated above on the fuel map.
Moved MAP vac. line to a port closest to the secondary butterfly on the TB to try and smooth out some of the MAP 'noise' i was seeing in logs, seems to have worked. Also now sees max. MAP faster on quick throttle changes.
Motor coming back apart this late fall/winter for some upgrades.
**EDIT**
Just did ~900miles this last weekend to H20international in MD, this tune yielded me 36.8 MPG on the highway. Made it down in one tank, and back on almost 3/4 of a tank!!
Re: 8V ABA/Counterflow Hybrid Jetta
Had some problems with the A/f, running very lean, then overcorrected, and ran really rich.
Best was 116hp/128tq, max torque coming in at 2500 RPM and staying around 125ft/lbs untill about 4800 RPM.
Not a ton of power, but VERY fun to drive! Stay tuned for the new motor set-up!
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