Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Donor cars
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 25th February 2010, 04:33 PM
JB182 JB182 is offline
Junior Member
 
Join Date: Feb 2010
Posts: 4
Default Questions on 2.0L DOHC

Hi all,

This is my first time on the forum and as a bit of background I've just started collecting the bits for my first time build of a Roadster. By chance I had the opportunity to pick up a low mileage Sierra 2.0L Gli as a donor car but now looking over many of the historical posts I have a bunch of questions.

I understand that the DOHC engine and associated MT75 gearbox is not ideal but it can be used. I don't have an issue with the tunability of the unit, 125bhp sounds loads and it's looks good. However my questions are:

1. Engine clearance; the enigine is tall and the plenum chamber sits even higher. What modifications have other builders used, I'd still like to keep it fuel injected?

2. Transmission tunnel mods. Do the published changes work in practice and is there any downside?

3. Transmission ground clearance. Are there any problems here?

4. Is changing from the DOHC to a Zetec unit after IVA a vabiable ooption if needed?

5. Anything else I should be aware of? I'd love to hear from people who have goen through the 'pain' of using this donor.

Basically I'd like to know is it worth carrying on with the current donor I have (it's a very tidy car) or should I look for something else more appropriate.

Thanks in advance,

Jeff
Reply With Quote
  #2  
Old 25th February 2010, 07:01 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,342
Default

GLi?

1) Bonnet hump or custom plenum. DO KEEP IT EFI THOUGH

2) Onlydownside is a little less leg room for the driver.

3) Nope

4) Yes should eb a reasonable easy swap.

5) ??

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #3  
Old 25th February 2010, 07:09 PM
james3004's Avatar
james3004 james3004 is offline
Senior Member
 
Join Date: Oct 2007
Location: Haddenham, Cambridge
Posts: 479
Default

That is the sort of donor I was looking for, Does it have rear discs?

I still haven't decided to go with discs or drums yet, just know I need a mt75 gearboxed sierra as i made the chassis to suit
__________________
--- James ---

IVA passed 20 June 2017
Flickr Album
Reply With Quote
  #4  
Old 25th February 2010, 07:19 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,342
Default

A type 9 will fit an MT75 chassis but not the other way round.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #5  
Old 25th February 2010, 07:20 PM
HandyAndy's Avatar
HandyAndy HandyAndy is offline
Senior Member
 
Join Date: Jan 2009
Location: cleveland
Posts: 3,917
Default

Quote:
Originally Posted by james3004 View Post
just know I need a mt75 gearboxed sierra as i made the chassis to suit
James.........

not sure if you are aware...........but a Type 9 gearbox will still fit in a transmission tunnel that has been made for the MT75, tho it won,t work the other way around , an MT75 won,t fit in a type 9 tunnel.

so don,t despair if you can,t find a MT75 box

cheers
andy
__________________
Flat Pack Chassis Kits for sale, contact me at andyroadster@yahoo.co.uk
Reply With Quote
  #6  
Old 25th February 2010, 07:27 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,342
Default

Strange, sure I just said that...

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #7  
Old 25th February 2010, 07:29 PM
HandyAndy's Avatar
HandyAndy HandyAndy is offline
Senior Member
 
Join Date: Jan 2009
Location: cleveland
Posts: 3,917
Default

Quote:
Originally Posted by twinturbo View Post
Strange, sure I just said that...

TT

there,s an echo in here.....

Doh, silly me....you must have posted whilst i was SLOWLY typing

well at least the point has been made TT

cheers
andy
__________________
Flat Pack Chassis Kits for sale, contact me at andyroadster@yahoo.co.uk
Reply With Quote
  #8  
Old 25th February 2010, 07:46 PM
Bonzo's Avatar
Bonzo Bonzo is offline
Senior Member
 
Join Date: Jul 2007
Location: Cornwall
Posts: 3,321
Default

Quote:
Originally Posted by twinturbo View Post
Strange, sure I just said that...

TT

Andy probably typed it first .... Just having problems with his .....little dongle thingy !!??

Any DOHC Sierra should have the MT75 box & rear disks
__________________
I am not a complete idiot...........Some of the parts are missing !!
Ronnie

www.roadster-builders.co.uk
Reply With Quote
  #9  
Old 25th February 2010, 07:59 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,342
Default

No, Drums are common on 2.0 DOHC's

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
  #10  
Old 25th February 2010, 08:01 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,342
Default

Only ABS equiped cars and some rare non ABS cars have rear disks.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost 4181.65 - Last - Wheel Cylinders
Reply With Quote
Reply


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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 10:09 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.