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02-25-2006 11:09 PM #1
2.5 upgrade, does it is worth it ???
I need to repair the motor of my E30 M3. I want to go with the 2.5lt upgrade. Do you think that it is worth it pay so much $$$ for it, compared with the gain, or you understand that it is more practical to just repair my current motor?? Iused my car on a daily basis.
What you think?
1988 Henna Red M3
02-27-2006 06:34 PM #2
02-27-2006 07:47 PM #3
02-27-2006 09:43 PM #4
02-27-2006 11:22 PM #5
02-28-2006 06:28 PM #6
Re: 2.5 upgrade, does it is worth it ???
I finished my 2.5 last summer and have put 1900 miles on it so far. If you do it right, it is well worth it to me. The new motor ROCKS! VAC stage 3 head with stock valves, cams, 2.5 kit etc. For all required components expect to spend 7-10k to do it yourself(assembly) add 2.5k for somebody else to put it together. However, it puts a ridiculous grin on my face whenever I rip it sideways. It is all good to me.
03-02-2006 04:02 PM #7
here is a video of modified 2.5l
video here (WMV format)
on that setup gearing is as follows:
1st gear goes to 45 mph
2nd gear 67 mph
3rd gear 94 mph
5th gear rev limited at about 162 mph @ 8500 rpm
03-26-2006 11:52 PM #8
If it is within your means.......
I've always said that if my motor ever goes, I will do the 2.5 upgrade. I know turner has a basic kit for about $2500. As long as you don't get to crazy, I think you could maybe get every thing you need for the bottem end, and leave the top as is. Maybe just add bigger injectors. Of course, these things do have a way of getting out of hand. If I had the money....
03-27-2006 02:54 PM #9
cost of a "2.5l"
if youve never built an engine before, one may be suffering
from delusions what a real build up costs. This is an attempt
to explain a few issues.
step 1: realize that a "2.5l" as such does not exist. There are
quite a few variations of 2.5l out there, some even have the
same specs/parts but they differ in build quality non the less.
step 2: realize there is no "kit" per-se. you can buy a 2.5l crank
at the dealer yourself.
step 3: realize you first need to upgrade a lot of peripheral parts
before you can call it a "real 2.5". e.g., things like
TBs and header/exhaust system. If you stick with the AFM,
then you should get an E3 AFM with the larger 300cc injectors.
slapping on a stock head on to a 2.5l is about the worst way
to build a 2.5.
step 4: realize your engine actually needs a full rebuild before
tuning/modding it. you know, things like timing chain gear needs
replacing, or the head needs new valve guides, stuff like that.
these are "base level costs" that are incurred on ANY engine
rebuild, including stock engine rebuilds.
most people that go with highly tuned engines end up with all
new (or nearlz all new) parts. they just replace everything.
on the "high hp" S14s, there is merit in using an EVO3 block
e.g. there is also merit in using oil squirters.
unfortunately, if you havent done this before you are going to
go shopping and surfing catalogues. a big fat warning: dont
go with someone just because they quote silly hp numbers, these
are unrealistic for the hardware used. HP does not simply add up
with the number of mods done. That is my advice.
03-30-2006 02:27 PM #10
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