Go Back   DTMPower BMW Forum > DTMPower Forum Archive > Archived Threads

 
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 08-11-2002, 09:54 PM
Master License
 
Join Date: Jul 2002
Location: Tidewater, VA
Rides:'95 318ti CS
Posts: 179
ClbSprt ti is a New Registered Member
M42 engine mods...

I really want some more usable power out of my ti. Is there anything else to do (without FI)? Does anyone make underdrive pulleys for the engine? Of course i could do an inline-6 swap, but i think that would really disrupt my weight distribution. So i guess the question stands, what are the best bolt ons for the m42.
  #2 (permalink)  
Old 08-11-2002, 09:59 PM
unban vb pls.'s Avatar
Vancouver rep.
 
Join Date: Apr 2002
Location: Van-couver B.C.
Rides:none
Posts: 2,072
unban vb pls. is a New Registered Member
I doubt it will disrupt your weight distribution that much.
you probably look at mostly 60:40 f/r, that's still not bad.

bolt ons probably can give you no more than 10 rwhp
  #3 (permalink)  
Old 08-11-2002, 10:01 PM
Master License
 
Join Date: Jan 2002
Location: Greensboro NC
Rides:1995 BMW 318Is
Posts: 232
my318is is a New Registered Member
cams, multithrottle intake, custom pistons, displacement to 2.1 liter, underdrive pulleys, chip, tuning software, differential, light wheels. hmm im sure theres more but i cant think right now
  #4 (permalink)  
Old 08-11-2002, 10:05 PM
unban vb pls.'s Avatar
Vancouver rep.
 
Join Date: Apr 2002
Location: Van-couver B.C.
Rides:none
Posts: 2,072
unban vb pls. is a New Registered Member
displacement to 2.1 liter, I have heard that long ago, but I doubt
anyone here has done it before...it is done by ACS or sth?
  #5 (permalink)  
Old 08-11-2002, 10:18 PM
Master License
 
Join Date: Jan 2002
Location: Greensboro NC
Rides:1995 BMW 318Is
Posts: 232
my318is is a New Registered Member
Quote:
Originally posted by unban vb pls.
displacement to 2.1 liter, I have heard that long ago, but I doubt
anyone here has done it before...it is done by ACS or sth?

A guy on my old board did it. he has somewhere around 220hp at the crank.
  #6 (permalink)  
Old 08-11-2002, 10:19 PM
Master License
 
Join Date: Jan 2002
Location: Greensboro NC
Rides:1995 BMW 318Is
Posts: 232
my318is is a New Registered Member
BTW doing that would be WAY more expensive than getting a swap or going FI.
  #7 (permalink)  
Old 08-12-2002, 03:41 AM
E30 Stu's Avatar
GoInTailOut
 
Join Date: Nov 2001
Location: Winston-Salem NC
Rides:E30 316d
Region: USA - South East
Posts: 1,694
E30 Stu is a New Registered Member
Yea, when you are talking about doing cams, 11:1, multi-throttle intake, etc, that is just spending too much money and not getting much power. The M42 already has hot cams (240/240), plenty of head flow, an excellent exhaust manifold/system.

Your best bet is to do an engine swap, for a 2.5L or 3.0L M50.

One thing you CAN do is change out your intake manifold for one off a '91 M42 motor. I am pretty sure it fits yours, and it flows a LOT better. BMW put a choker of an intake manifold on the M42's after '91 and it kills the power above 5500. Looking into finding one off a '91 318is or '90-'91 318i.
  #8 (permalink)  
Old 08-12-2002, 04:30 AM
Aaron318iS's Avatar
 
Join Date: Dec 2001
Location: Sydney, Australia
Rides:E46 M3
Region: Australia
Posts: 5,128
Aaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master License
do the '91 cars use the same intake manifold as the e30 318is?
the e30 version looks to be better flowing..

would you mate the intake manifold to ur current throttle body?
__________________
  #9 (permalink)  
Old 08-12-2002, 09:52 AM
Master License
 
Join Date: Jul 2002
Location: Tidewater, VA
Rides:'95 318ti CS
Posts: 179
ClbSprt ti is a New Registered Member
Quote:
Originally posted by E30 Stu
One thing you CAN do is change out your intake manifold for one off a '91 M42 motor. I am pretty sure it fits yours, and it flows a LOT better. BMW put a choker of an intake manifold on the M42's after '91 and it kills the power above 5500. Looking into finding one off a '91 318is or '90-'91 318i.
does this really make a difference? does anyone know for sure if it fits?
  #10 (permalink)  
Old 08-12-2002, 12:31 PM
E30 Stu's Avatar
GoInTailOut
 
Join Date: Nov 2001
Location: Winston-Salem NC
Rides:E30 316d
Region: USA - South East
Posts: 1,694
E30 Stu is a New Registered Member
The manifold should fit. I think it will bolt right up to your t-body too. It flows a LOT better than the later style, dual-stage manifold. You MIGHT lose a little low-end, but the gains over 5000 are immense.
  #11 (permalink)  
Old 08-12-2002, 12:38 PM
Master License
 
Join Date: Jan 2002
Location: Greensboro NC
Rides:1995 BMW 318Is
Posts: 232
my318is is a New Registered Member
Quote:
Originally posted by E30 Stu
The manifold should fit. I think it will bolt right up to your t-body too. It flows a LOT better than the later style, dual-stage manifold. You MIGHT lose a little low-end, but the gains over 5000 are immense.

How much gain are we talking.. Is this something you could score from a local junk yard?
  #12 (permalink)  
Old 08-13-2002, 08:42 AM
Master License
 
Join Date: Jul 2002
Location: Tidewater, VA
Rides:'95 318ti CS
Posts: 179
ClbSprt ti is a New Registered Member
bump
  #13 (permalink)  
Old 08-13-2002, 12:44 PM
E30 Stu's Avatar
GoInTailOut
 
Join Date: Nov 2001
Location: Winston-Salem NC
Rides:E30 316d
Region: USA - South East
Posts: 1,694
E30 Stu is a New Registered Member
Quote:
Originally posted by my318is



How much gain are we talking.. Is this something you could score from a local junk yard?
Yea, be sure to get one off an E30 318i/S '90-'91. Probably a good 10-12 hp above 5500 rpm, assuming you have a chip.
  #14 (permalink)  
Old 08-13-2002, 11:32 PM
Aaron318iS's Avatar
 
Join Date: Dec 2001
Location: Sydney, Australia
Rides:E46 M3
Region: Australia
Posts: 5,128
Aaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master LicenseAaron318iS has achieved their Master License
i must investigate! sounds like an interesting upgrade

question though, if it gives 10 - 12hp, why isnt the e30 twin cam have more power than the e36 version??
__________________
  #15 (permalink)  
Old 08-14-2002, 03:58 AM
E30 Stu's Avatar
GoInTailOut
 
Join Date: Nov 2001
Location: Winston-Salem NC
Rides:E30 316d
Region: USA - South East
Posts: 1,694
E30 Stu is a New Registered Member
Quote:
Originally posted by ABX-18Z
i must investigate! sounds like an interesting upgrade

question though, if it gives 10 - 12hp, why isnt the e30 twin cam have more power than the e36 version??
It does. BMW rated it at 134. It's not 134. I am sure a '91 M42 will put out about 140-143.

I raced a friends '92 (maybe 93) 318is when I got my '91. Mine was stock, his had a chip, isolated cone filter, and exhaust.

By the top of third I was 15-20 feet ahead of him. The '92---> manifold just does not pull up top (where it needs to).
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 02:31 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 ©2011, Crawlability, Inc.
RV12
DTM Power © 2013
Message Board Statistics