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Old 10-30-2015, 08:29 AM   #421
e30onBBSs
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Checked realoem and the intake manifold gaskets are different from b27 to b25. If I want to use b27 manifold + b25 throttle body I would use the b27 intake manifold gaskets to attach to the 885 head? The b27 manifold bolts up to the 885 head right?
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Old 10-30-2015, 08:43 AM   #422
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The bolt patterns are the same but the port sizes/shapes are way different
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Old 10-30-2015, 08:29 PM   #423
e30onBBSs
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Quote:
Originally Posted by modernist View Post
The bolt patterns are the same but the port sizes/shapes are way different
thanks modernist (2.7i expert)
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Old 03-09-2016, 10:04 PM   #424
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Hi all.

Recently converted my 86' 325 to a 2.7i with parts from an 89' 325i. I am having an issue with the throttle cutting out around above 2500 RPM (hard to tell as I don't have the tach hooked up). The car idles fine, but starts cutting with more then 1/4 throttle applied. If I keep the throttle open, it will rev up for a second, cut off, rev up, cut off, etc. Any idea what could be causing this? It does this at all temperatures and with/without o2 sensor or throttle position sensor plugged in.

The car ran well before the conversion; so I should be able to rule out old parts still on the car (fuel pump, filter) and focus on the new parts.
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Old 04-30-2016, 11:46 AM   #425
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I now have ever conceivable part to do my swap and my last question (I hope) is regarding the exhaust manifold. I have a b25 dual pipe cat and cat back and I'm fairly comfortable that it will bolt up to my ETA exhaust manifold.

Since I'm un der the impression that the ETA manifold is a little smaller inside will that restriction be enough of an issue to justify grabbing a b25 or could it actually be better to keep the ETA manifold as the back pressure could help ?

...or does it really not matter
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Old 05-01-2016, 11:47 AM   #426
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Originally Posted by Untouched View Post
Hi all.

Recently converted my 86' 325 to a 2.7i with parts from an 89' 325i. I am having an issue with the throttle cutting out around above 2500 RPM (hard to tell as I don't have the tach hooked up). The car idles fine, but starts cutting with more then 1/4 throttle applied. If I keep the throttle open, it will rev up for a second, cut off, rev up, cut off, etc. Any idea what could be causing this? It does this at all temperatures and with/without o2 sensor or throttle position sensor plugged in.

The car ran well before the conversion; so I should be able to rule out old parts still on the car (fuel pump, filter) and focus on the new parts.
Did you swap in the 325i AFM? Is it connected?
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Old 05-06-2016, 04:40 PM   #427
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Hey there i have a 87 325is and im swapping a E block I had in it. If i get 17# injectors with a intake and the sssquid chip ontop of being the stroker, will this be a noticeable difference?? Also is there anything besides the block that i need from the e motor or is it just the block? Thanks so much!
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Old 05-10-2016, 11:31 AM   #428
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Are you doing all the internals from the 2.7 block as well? It's the crank/rods/pistons that make it the 2.7L. Other than that, as long as your electronics match up to your head, you'll be good.

Just make sure you include the hall effect cog from the 2.5 engine, and not the 2.7 engine.

You'll notice quite a jump in Tq doing the 2.7 conversion, with a few more HP-- but the real draw is the Tq coupled with the ability to get more power out of the engine with other mods (cams/turbo/valves/ITB) over the 2.5 engine.
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Old 08-14-2016, 02:16 PM   #429
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I'm in the process of assembling a stock eta block and 731 head to install in my '86 325e. So far I'm planning to use these parts from my '89 325i to swap to Motronic 1.3: engine harness, intake manifold, fuel injectors, throttle body, AFM, 173 ecu.

The issue I'm running into is that I don't want to have to buy a late style radiator and just use the '86 radiator I already have. I understand I need to use the early style water pump with the early radiator, but can I use the thermostat housing from my '89 325i? If I had to use a late style radiator I'm confused about how to mount the late coolant reservoir in the early engine bay.
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Old 08-18-2016, 06:26 PM   #430
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Originally Posted by E30 Wagen View Post
I'm in the process of assembling a stock eta block and 731 head to install in my '86 325e. So far I'm planning to use these parts from my '89 325i to swap to Motronic 1.3: engine harness, intake manifold, fuel injectors, throttle body, AFM, 173 ecu.



The issue I'm running into is that I don't want to have to buy a late style radiator and just use the '86 radiator I already have. I understand I need to use the early style water pump with the early radiator, but can I use the thermostat housing from my '89 325i? If I had to use a late style radiator I'm confused about how to mount the late coolant reservoir in the early engine bay.


Looks like its the same part # between early and late models. Should be able to keep the cooling system as is.
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