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Twins! - Iron Block Performance Build-ups
https://slantsix.org/forum/viewtopic.php?t=26159		 Page 1 of 7
Author:  Doctor Dodge [ Thu Dec 06, 2007 9:28 pm ]
Post subject:  Twins! - Iron Block Performance Build-ups
Working "double time" on getting engines built.
I started on "Raquel" a few weeks back and already have the block preped, bored .060 o/s and have the con rods selected. Piston and crank work is in process as we speak.

In the meantime... another SL6 arrived for a rework... we call this one "Guzzi". This engine was purchased already rebuilt for performance but the owner wants it torn down and reviewed, then reassembled for racing. The goal is to have it rebuilt by the New Year so the owner can get it into his car and out to Las Vegas in March.

Another "first" for me, (us) as Allen and myself are building these two Slants "side-by-side". We will keep everyone posted on the results.
DD

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Author:  icaneat50eggs [ Thu Dec 06, 2007 10:21 pm ]
Post subject: 
Doc, you name all the builds after women cause of all the problems they give you? :D
Author:  sandy in BC [ Fri Dec 07, 2007 7:07 am ]
Post subject: 
Its too bad we overloaded our teleporter last week...(Alex , why did you even think the Sub and trailer would fit in there?).....cuz I would love to drop by with the Valaint motor and be Allan II for a while.....

Looks like I will have to fuddle away here to make LV......right after we clear the teleporter....

Keep us posted!
Author:  Doc [ Fri Dec 07, 2007 12:17 pm ]
Post subject: 
Quote:
Doc, you name all the builds after women cause of all the problems they give you? :D
I don't know if Guzzi is a women's name...
May-be if I keep these two together long enough, they will have "little Slants" :roll: :wink:
DD
Author:  Aggressive Ted [ Fri Dec 07, 2007 12:23 pm ]
Post subject: 
Very cool! More shared secrets to unleashing the power!

Do either of these have a Schnider cam? like this??

Mopar 170/198/225 6 Cyl. - Solid
1 2 3 4 5 6 7 8 9 10 11 12
14510 132F 264 264 224 224 .480" .480" 110 .014" .014" 44585

It would be nice to see a build with this cam.
Author:  Doctor Dodge [ Sat Dec 08, 2007 8:02 am ]
Post subject: 
No Schnider cam in either of these build-ups.
Raquel get's a Isky cam, Guzzi gets an Erson.
Both cams for these engines are way more aggressive then the Schnider cam specs you posted.
DD
Author:  sandy in BC [ Sat Dec 08, 2007 8:36 am ]
Post subject: 
I take it these are High Compression/Big Cam race motors?

Is there a Twiggy style writeup coming?
Author:  Doctor Dodge [ Sat Dec 08, 2007 10:48 am ]
Post subject: 
Yes, Both engine are being built as "race only" with big cam, lots of head work and compression.

If helpful, I can point-out "special stuff" as we get these engines assembled.
I will mainly focus on stuff that applies to race Slants that I did not covered in the Twiggy build-up.
DD
Author:  Aggressive Ted [ Sat Dec 08, 2007 11:18 am ]
Post subject: 
When you have a moment could you post cam spec's and compression ratio's to give us a heads up on how much HP your shooting for? That would put all your work into context.

You always say, figure out and focus in on what you want and build for it. I did with your help and am very happy.

Thanks! :)
Author:  Doctor Dodge [ Fri Dec 28, 2007 7:37 pm ]
Post subject: 
The Guzzi engine is progressing but poor Raquel is "stuck"... I can't seem to find a crankshaft that meets my needs for that engine.

Anyway, the Guzzi engine has a Erson 270 cam ground on a 110 L/C
I milled .085 off the block to get a -.110 piston deck height.
(Yes, the pistons started out being .195 down in the holes)
The compression is set to be 10.5 to 1 per the customer's request, using race fuel is "not an issue" seeing this will be a "racer".

One thing I did before milling the block was to install plugs in the "sand shake-out" holes that the head gasket blocks-off, this will help stabilize the top deck.
Image

You can spot a block that has been decked by the depth of the wall in the middle of the lifter area, this is usually .100 below the deck. The arrow points to this spot and on Guzzi, it is now just about flush with the top deck.
The other arrow points to the bolt holes, which have to be re-counter sunk after decking.
DD
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Author:  madmax/6 [ Sat Dec 29, 2007 8:36 pm ]
Post subject: 
Being the owner of the Guzzi motor,this is VERY interesting to me,This motor is going into a special 62 Signet,3.5 chop top,working like crazy trying for Vegas this year,will be posting pics soon,sanding,grinding.bleeding Mark
Author:  madmax/6 [ Sat Dec 29, 2007 9:56 pm ]
Post subject: 
Think this is why Doug called this the Guzzi motor,,,,,,Mark, owner of Moto Guzzi Classics, www,motoguzziclassics.com
I also have a restored aluminum block 62 Signet,NOT PINK,sandstone,2 1bbls,Dutra Duals,daily driver,will post pics of chop top soon,
Mark
Author:  Doctor Dodge [ Sun Dec 30, 2007 10:21 pm ]
Post subject: 
I was wondering when Moto Guzzi Mark would chime-in.

Guzzi went together well, the only out of the ordinary thing was the amount of cam retard needed toget the cam events in the right place... must be that 70s vintage MP (Mopar Performance) double row timing chain set we used.

The engine also gets a MP windage tray.

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I did a little rewelding seeing that Mopar's manufacturer only used one small spot weld per corner... and I have seen those come loose.
The tray also needed a little more clearance where the pick-up tube passes by, hence the "V" cut in the side cut-out.
DD

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Author:  Dart270 [ Sat Jan 05, 2008 10:23 am ]
Post subject: 
Hey Mark,

Good to see you on the site. I met you at SF with my '64 roadracer Dart from VA. Sorry I never pushed your account thing on the site here and glad you have that sorted.

Great that you're building another serious Slant project!

Cheers mate,

Lou
Author:  Doctor Dodge [ Sat Jan 05, 2008 7:55 pm ]
Post subject:  One Down...
We have the Gizzi engine assembled.
Everything went together well. Static compression ended-up at 10.7 when we cc checked the volume thru the spark plug hole at TDC.
Ended-up a pinch higher because we used a steel shim head gasket instead of a thicker composit type gasket.
Here is what it looks like assembled:

Image

We added some longer rocker arm ball-stud adjuster screws and lock nuts. This allows proper lash adjustment without custom lenght pushrods.

Image

Now I have to "shift gears" and do a 904 trans. rebuild... the decision was made to switch away from the cable type tranny and go with a big input shaft 68 and up 904 to go with this new engine.
DD
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