Hey fellers,
I'm in need of R3V's assistance.
Background:
I recently put a new head (bimmmerheads, 280/274 regrind, hd rockers) on the ole '88 iX, along with a lightly ported intake manifold done by Curt Brown, and all new plugs, wires, cap, rotor, water pump, gates belt, gaskets, etc. The car has fresh M50 injectors and an SSSQuid chip for 93 octane, and a K&N drop in.
The car ran well before I completed this work. The head was a hair noisey and the plugs/cap/rotor were long overdue, so I figured it was time to R3v this bish.
Now:
The car starts up, idles, and drives fine, however, it feels ridiculously low on power. You can notice in the way the car revs too, compared to my lil bros stock 250K M20. It feels like a dog. But it doesn't misfire. And there's no CEL. And it does everything fine. Just feels extremely slouchy. For example, it really hates revving if under 1K, and it revs very slow pretty much all around (which is the video I have attached below).
I do E30 timing belts and maintenance at work all of the time, so I'm quite familiar with the platform. I triple checked the timing and it was dead on. No gasket leaks on the intake manifold, I cleaned the throttle body, etc. Can't find any vacuum leaks anywhere.
Does anyone have any ideas on what could cause this? It doesn't really appear to 'pick up' on the top end either like it's just a cam that lost some low end. Just feels extremely lazy all around. The head was just 'cleaned up' by them, and had the ramps of the intake ports changed. I'm just wondering if the head and cam could make it lose all of it's grunt like that? I haven't readjusted the valves after driving it for a bit. Not sure if that could do it? I doubt it, though, as the old head the valves were lightyears out of spec and it ran fine.
At first I just assumed it was normal, but something is definitely not right.
In this idle video you can hear little 'pops' in the exhaust, specifically around 12sec. Kind of sounds exhaust valve related? I don't know. Also, you can hear the noisy valves that I guess need readjusting.
In this video, pay attention to the throttle usage vs revs. Photobucket compressed it to death, so please excuse that.
I don't know. Let me know what you think. Any help is very much appreciated.
I'm off right now to do a wet and dry comp test and vacuum leak test.
I'm in need of R3V's assistance.
Background:
I recently put a new head (bimmmerheads, 280/274 regrind, hd rockers) on the ole '88 iX, along with a lightly ported intake manifold done by Curt Brown, and all new plugs, wires, cap, rotor, water pump, gates belt, gaskets, etc. The car has fresh M50 injectors and an SSSQuid chip for 93 octane, and a K&N drop in.
The car ran well before I completed this work. The head was a hair noisey and the plugs/cap/rotor were long overdue, so I figured it was time to R3v this bish.
Now:
The car starts up, idles, and drives fine, however, it feels ridiculously low on power. You can notice in the way the car revs too, compared to my lil bros stock 250K M20. It feels like a dog. But it doesn't misfire. And there's no CEL. And it does everything fine. Just feels extremely slouchy. For example, it really hates revving if under 1K, and it revs very slow pretty much all around (which is the video I have attached below).
I do E30 timing belts and maintenance at work all of the time, so I'm quite familiar with the platform. I triple checked the timing and it was dead on. No gasket leaks on the intake manifold, I cleaned the throttle body, etc. Can't find any vacuum leaks anywhere.
Does anyone have any ideas on what could cause this? It doesn't really appear to 'pick up' on the top end either like it's just a cam that lost some low end. Just feels extremely lazy all around. The head was just 'cleaned up' by them, and had the ramps of the intake ports changed. I'm just wondering if the head and cam could make it lose all of it's grunt like that? I haven't readjusted the valves after driving it for a bit. Not sure if that could do it? I doubt it, though, as the old head the valves were lightyears out of spec and it ran fine.
At first I just assumed it was normal, but something is definitely not right.
In this idle video you can hear little 'pops' in the exhaust, specifically around 12sec. Kind of sounds exhaust valve related? I don't know. Also, you can hear the noisy valves that I guess need readjusting.
In this video, pay attention to the throttle usage vs revs. Photobucket compressed it to death, so please excuse that.
I don't know. Let me know what you think. Any help is very much appreciated.
I'm off right now to do a wet and dry comp test and vacuum leak test.
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