would it be pap? cheers320i head on a 2.7 block
Moderator: martauto
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
First of all, welcome to the zone.
This one's been discussed many, many times on the zone. A forum search (use the button under the page header), should show up dozens of posts on the subject.
Short answer is: you will produce an engine developing a useful amount more power than a 325, with a lot more torque.
You will need to use the motronic management system, a 325 inlet manifold and throttle body, and a zone 2.7 chip in the ECU.
Only machining needed is opening out the ports of the head slightly to match the 325 manifold
This one's been discussed many, many times on the zone. A forum search (use the button under the page header), should show up dozens of posts on the subject.
Short answer is: you will produce an engine developing a useful amount more power than a 325, with a lot more torque.
You will need to use the motronic management system, a 325 inlet manifold and throttle body, and a zone 2.7 chip in the ECU.
Only machining needed is opening out the ports of the head slightly to match the 325 manifold
Hi,
I have looked at this subject for hours and still cannot make up my mind what makes the best 2.7 engine, There does seem to be a lot of conflict of opinion as to what bits make the best 2.7
Would the 320i head on the 325i block give a noticable increase ? and would the eta block improve this further.
Thx David.
I have looked at this subject for hours and still cannot make up my mind what makes the best 2.7 engine, There does seem to be a lot of conflict of opinion as to what bits make the best 2.7
Would the 320i head on the 325i block give a noticable increase ? and would the eta block improve this further.
Thx David.
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Templ8e30
- E30 Zone Addict
- Posts: 2801
- Joined: Mon Jan 10, 2005 11:00 pm
- Location: Ashton-under-Lyne, Lancashire
You can't fit a 320i head to the 325i block as the pistons will clash with the head. The 325i pistons have a unique shape and will only work with a 325i head.eRgal wrote:Hi,
I have looked at this subject for hours and still cannot make up my mind what makes the best 2.7 engine, There does seem to be a lot of conflict of opinion as to what bits make the best 2.7
Would the 320i head on the 325i block give a noticable increase ? and would the eta block improve this further.
Thx David.
Best 2.7 is 325i head with 325i pistons machined to fit into either a 325i or 525e block using the 525e crank and non-325i conrods. The block will have to have about 1.5mm shaved off the top to get the correct piston height.
All non-325i conrods are the same part.
You'll also need a vernier adjustable cam pulley to compensate for the shaved block.
A good camshaft of at least 272 degrees is also desirable.
Get building
Cheers,
Iain T
2007 Mazda 6 2.0 estate
Political Correctness - A concept based on the idea that its possible to pick up a turd by the clean end !
ah soz I read orginal post wrong , Thought he had said 2.5 block but its 2.7
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Geeman
- Married to the E30 Zone
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Iain speaks the truth, but a 320 head on a 525e block will be a good unit if you do the things that Brian says. This is the simplest route to 2.7 power. Wouldn't hurt to add a cam too.
Where doing the same thing with my 2.7 eta egine, we put a shaved 2.0 head on this eta block. And i don't need the oil cooler anymore, which you need with a 2.5 or 2.7 head.
give me more power please babe
give me more power please babe