whatoctaneiscoffee
now with more caffeine!
- Joined
- Apr 25, 2020
- Location
- Maryland
Hello tbrickers, I'm nearing the limit of my own troubleshooting ability and would love your input.
The previous owner of this new-to-me motor had it built before deciding to go a different direction. It's a 1993 b230ft with a ported 530 head and rsi stage 1 cam. I brought it home, gave it some new gaskets, and put it in my 93' 940 wagon. I kept my stock mitsubishi turbo. The car idles fine, wavers a little bit but nothing unreasonable. When accelerating, if I give the car half throttle my boost gauge goes right to 8psi. Full throttle takes it straight to 13, and the kickdown takes it nearly to 20. The engine revs normally, a bit faster than I'd experienced with the stock cam in the other motor, and the aw71 shifts normally. On the drive where I got the above boost numbers my exhaust manifold was glowing when I checked it, centered around the flange. Since then I've driven using no more than 1/4 throttle which keeps boost at 2psi or below, and that's kept my manifold the correct color.
That alone has me concerned, but what really has me scratching my head is that the car is also painfully slow. Past that 1/4 throttle rpm and psi keep increasing but the car doesn't move any faster. I can't find any vacuum leaks, I've checked and re-checked my timing, tried adjusting the cam backwards and forwards, all to no avail. Transmission fluid looked a little dark, so I drained and refilled it and have a new filter on the way. I'm fitting a wideband tomorrow. Anything else I should check?
The previous owner of this new-to-me motor had it built before deciding to go a different direction. It's a 1993 b230ft with a ported 530 head and rsi stage 1 cam. I brought it home, gave it some new gaskets, and put it in my 93' 940 wagon. I kept my stock mitsubishi turbo. The car idles fine, wavers a little bit but nothing unreasonable. When accelerating, if I give the car half throttle my boost gauge goes right to 8psi. Full throttle takes it straight to 13, and the kickdown takes it nearly to 20. The engine revs normally, a bit faster than I'd experienced with the stock cam in the other motor, and the aw71 shifts normally. On the drive where I got the above boost numbers my exhaust manifold was glowing when I checked it, centered around the flange. Since then I've driven using no more than 1/4 throttle which keeps boost at 2psi or below, and that's kept my manifold the correct color.
That alone has me concerned, but what really has me scratching my head is that the car is also painfully slow. Past that 1/4 throttle rpm and psi keep increasing but the car doesn't move any faster. I can't find any vacuum leaks, I've checked and re-checked my timing, tried adjusting the cam backwards and forwards, all to no avail. Transmission fluid looked a little dark, so I drained and refilled it and have a new filter on the way. I'm fitting a wideband tomorrow. Anything else I should check?