Tips/advice for a higher performance M10 rebuild?

[RenaissanceMan]

So I just picked up a spare M10 and matching transmission from a '73 2002 for a total steal... I just finished by E30/S52 transplant so I'm ready for the next project. The motor in my all original '76 runs great, but I thought it would be fun and educational to do a performance rebuild on this spare motor that I could drop in for fun if I wanted to. I've never rebuilt an M10. Any tips or lessons learned y'all could share w/ me? I want this to be a higher hp motor that can still be practically run on the street. What's a good plan? Increased bore? Aggressive cam? Dual sidedrafts? I'm still somewhat of a rebuild newbie but I'm not scared to dive in. Thanks-

[Schnellvintage]

Good morning, i have had great results with 10:1 pistons, 284 or 292 cam, in an E12 head. IE stubby headers. With a massaged 32/36 Weber. Match port the head, and balance everything. Rocker arm locks. With shot peeled rockers. IE windage plate.
Unfortunately results vary. But this is my dyno spec sheet only with EFI Megasquirt.

Cheers,
Matt




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[Schnellvintage]

Ps..
at the rear wheels [emoji16]
Matt


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[xr4tic]

Define "Higher HP motor"

 

I'm rebuilding my motor now, I did some searching but had a tough time finding reliable HP numbers for "streetable" builds.  Expect 130-150HP, depending on budget.  The costs go way up if you're looking for more and streetability is iffy.

 

If you want more than that and still be streetable, consider a turbo and EFI.  You could probably slap a turbo and EFI on your current engine and be close to 200HP and be way ahead in the budget compared to a normal rebuild

 

My build is 9.5:1 CR, longer rods, lightweight flywheel, headers, Weber 38, and 123tune ignition.  No idea what it will produce, but should be significantly more than the original engine that had 80% cylinder leakage.

[RenaissanceMan]

Define "Higher HP motor"
 
I'm rebuilding my motor now, I did some searching but had a tough time finding reliable HP numbers for "streetable" builds.  Expect 130-150HP, depending on budget.  The costs go way up if you're looking for more and streetability is iffy.
 
If you want more than that and still be streetable, consider a turbo and EFI.  You could probably slap a turbo and EFI on your current engine and be close to 200HP and be way ahead in the budget compared to a normal rebuild
 
My build is 9.5:1 CR, longer rods, lightweight flywheel, headers, Weber 38, and 123tune ignition.  No idea what it will produce, but should be significantly more than the original engine that had 80% cylinder leakage.

I would totally be happy with something between 130 and 150 horsepower. I'm not looking to build the fastest 2002, but I would like it to have significantly more grunt or at least noticeably more grunt then the factory output of the M10

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[Dudeland]

It seems like there is becoming more user friendly conversions for efi. It will be on my next build. They are still very pricy for a out of the box solution. You can do a mega squirt with varying results. I rather go with a haltech based system.


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[jimk]

10 hours ago, Dudeland said:

I rather go with a haltech based system.

Haltech isn't that bad of a price if one doesn't buy a model more that needed.

[Rich]

also search this section for a GREAT thread titled, "Engine rebuild costs", there are a couple of pages of invaluable information, especially go to the 2nd page and look for the piece written by markmac from June 3 2017, he basically givces you a recipe for the whole rebuild, I also sent you a PM, good luck

[AceAndrew]

I've got a rebuild list for the basic hotrod M10 engine-spec. on the new website going together.  Please note that the site is still being built.

 

http://adamsautosport.com/information/tutorials/

 

[kbmb02]

Tip: compression, cam lift and balancing. -KB

 

 

Edited February 6, 2018 by kbmb02
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[RenaissanceMan]

Thanks so much for the great info so far!!! 

 

At this point I'm not really interested in EFI, forced induction, etc... Just interested more in a 'tested/streetable' approach to getting more power out of an M10 without having to go to debtors prison.  

[RenaissanceMan]

50 minutes ago, AceAndrew said:

I've got a rebuild list for the basic hotrod M10 engine-spec. on the new website going together.  Please note that the site is still being built.

 

http://adamsautosport.com/information/tutorials/

 

 

This is fantastic, thanks!

[2002Scoob]

12 hours ago, kbmb02 said:

Tip: compression, cam lift and balancing. -KB

 

 

 

What the devil is in that thing!?!

 

At first I was thinking 'my that idles quite nicely'

 

Then WHABAM! Revs to the moon lickity split! I want Brunhilde to do that...

 

Is there a flywheel or clutch pack on that thing?

[kbmb02]

5 hours ago, 2002Scoob said:

 

What the devil is in that thing!?!

 

At first I was thinking 'my that idles quite nicely'

 

Then WHABAM! Revs to the moon lickity split! I want Brunhilde to do that...

 

Is there a flywheel or clutch pack on that thing?

 

That’s one of my downdraft M10 race engines (and yes, flywheel, but no clutch). Sure - it’s helped by 12.5:1 compression (race gas!), yet the builds have proven to be reliable and long-living. I’ve been applying the tips and ‘tricks’ I use in these engines in the performance street engines I build for folks ... when I see the big grin the first time they drive their car with a new engine, it makes my day. -KB

[zinz]

Never fails to put a stupid grin on my face, Ken. 

 

Ed