| Author | Topic |
|---|
Location:
Melbourne
Registered:
May 2002
|
|
M engine bits swapin?
|
Wed, 17 December 2003 10:49
|
 |
hey i was thinkin of running an M engine car for rallyin (like an ma40 {if i could find one!  } or a mark2 corona) an i was thinkin of putting my 5m block into it with a carbed head (m, 2m, 4m) would it fit up ok ect? would it be worth some horsies? what about the 7m block? the 7m is cam belt rather then chain so that'd be a no?
what carbs could i run on the stock intack? OR where could i get some cooler intakes? side drafts, webbers ect
comments? questions?
|
|
|
Location:
Newcastle
Registered:
April 2003
|
|
Re: M engine bits swapin?
|
Wed, 17 December 2003 10:58
|
|
I belive you can't put the early (round tappet cover)heads on the late blocks.
If you want it to go faster than use the 5M block and head,port the head as much as you can to free it up a bit and use the late 4M carb manifold which will bolt on in place of the injection.
If you want to run twin carbs than you would need to make a manifold as i don't belive anyone makes manifolds for them here.
Although i maybe wrong so someone correct me if i am.
Good luck with it all.
|
|
|
Location:
Melbourne
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Wed, 17 December 2003 12:08
|
|
| ReQuieM wrote on Wed, 17 December 2003 21:49 |
hey i was thinkin of running an M engine car for rallyin (like an ma40 {if i could find one! } or a mark2 corona) an i was thinkin of putting my 5m block into it with a carbed head (m, 2m, 4m) would it fit up ok ect? would it be worth some horsies? what about the 7m block? the 7m is cam belt rather then chain so that'd be a no?
what carbs could i run on the stock intack? OR where could i get some cooler intakes? side drafts, webbers ect
comments? questions?
|
If you rally an MA45/46 your insane for 2 reasons:
A, heavy, long and strut front end not ideal for rally
B, Rare car worthy of better, that you cant get parts for anyway unless your willing to spend 10 years doing so
Get a 7m-ge do an Ed stick it in a shorter corona that has a double wishbone front end and there are a lot more replacement parts available when you have an off
Allan
|
|
|
Location:
Melbourne
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Thu, 18 December 2003 01:13
|
|
thanx allan wasn't sure how many we got over here. most of the ones i saw for sale were $$$ so i wasn't sure.
i didn't think any of the carb manifolds fit th later FI heads? or is there 'square' head carbs intakes? thats cool if i could find one,
|
|
|
I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Thu, 18 December 2003 02:19
|
|
You can use the early round tappet cover heads on the late blocks but you need to change the front timing cover to the early model one - the front head bolt pattern is different from early to late. Then you need to get the head and timing cover decked whilst they are bolted together so that you don't get oil leaks. The main problem is that you need to use a 41013, 41030 or 41032 head with the 5M to keep the same crappy 8.5:1 compression (they have the same head chamber volume as the 5ME head). To increase the compression, I would recommend using 5MGE pistons (they are slightly high topped).
You can use a 7MGE crank - obviously you will need to change the timing belt pulley to a chain pulley. I have seen a 7M crank in a 5M block running an early 4M head - effectively a 7M but SOHC and 2 valves per cylinder. Of course you will need to see if the head can support enough flow for a 3000 cc motor - I can tell you now the exhaust side certainly won't.
Big cams are also an issue due to the rocker arm geometry. Whilst it is possible to put a grind on the cam anything over 25/65 will result in grossly deranged cam timing. The only solution is to have the cam lobes welded and ground. This is a $500 job for an M series cam.
As for carbs, the easiest option is to fit a Weber carb off a Capri V6 (you can buy adaptor plates for the standard manifold) or a small Holley. If you can get your hands on one of the original twin carb manifolds made for the M series engines (both twin SUs [M-B manifold] and twin down draft [M-D manifold] were made), that would be better but of course you would need to set them up for a 3000cc motor.
In January, I will be having my M series clearout sale. Included will be my triple SU manifold complete with carbs, trumpets and socks.
It seems like a godawful lot of work for a result that will be ordinary. I'd just drop a 7MGE in there and be done with.
Some advice: Rally something that isn't rare. Corona Mk2s and MA4x are pretty thin on the ground now.
|
|
|
Location:
Lost in the K hole
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Thu, 18 December 2003 03:00
|
|
| gianttomato wrote on Thu, 18 December 2003 13:19 |
In January, I will be having my M series clearout sale.
|
*starts salivating and wishes he had a need for kool bits of toys to make a smell, throaty, untunable monster*
actually... that cab manifold suit a 7m head?
|
|
|
I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Thu, 18 December 2003 03:22
|
|
Mid January clearout. There will be some good stuff. All SOHC stuff apart from 1 head.
Cams, heads, bottom ends, motors, extractors, manifolds. I'll be keeping the never to be found again stuff though.
No, the triple SU manifold is for the early M series head.
|
|
|
Location:
Brisbane
Registered:
May 2002
|
|
Re: M engine bits swapin?
|
Fri, 19 December 2003 00:31
|
|
Hehe got a set of 5m-e cam's? lol
Cheers
Wilbo
|
|
|
Location:
1st street on the right
Registered:
November 2002
|
|
Re: M engine bits swapin?
|
Fri, 19 December 2003 09:12
|
|
Put me first on the list for the su manifold pls.
Have a twin but threesomes are more fun. 
|
|
|
