12v ITB's

Jim K
Verde
Verde
Posts: 1719
Joined: Tue Nov 30, 2004 12:10 am
Location: Athens,Greece

Re: 12v ITB's

Post by Jim K » Tue Jan 28, 2014 11:20 am

Post pics? You must be kidding Z! :shock:
viewtopic.php?f=2&t=4350 both pages.
Jim K.
User avatar
75evo
Verde
Verde
Posts: 820
Joined: Tue Oct 11, 2005 8:56 am

Re: 12v ITB's

Post by 75evo » Tue Jan 28, 2014 12:17 pm

Oh dang! Yeah you're right JK.
User avatar
Alfa 75 Racer
Gold
Gold
Posts: 50
Joined: Tue Jun 04, 2013 8:34 pm
Location: Austria

Re: 12v ITB's

Post by Alfa 75 Racer » Tue Jan 28, 2014 10:43 pm

Good Morning Guys !

Jim, you have a PM !

Thank you for the ppositive feed back about my 24V conversion !

At this point I have to thank KEVIN very very much for all his ideas, experiance and helpful parts !!!!!!

Block cleaning was a really hard work, ... first cleaning with grease remove solvent, ... then cleaning with hot water high pressure KÄRCHER, ... finaly cleaning ( took me almost one week !!!) with wire brushes by hand and mashine.

Yesterday I´ve done lightening of flywheel, it ended up with 8,2 kg.

I´ve also mashined the 75 pully to fit into the 166 small pully of the timing belt.

I wish everybody here a very nice day
Wolfgang
Attachments
P1020775.kl.JPG
P1020775.kl.JPG (212.14 KiB) Viewed 3095 times
P1020774.kl.JPG
P1020774.kl.JPG (221.86 KiB) Viewed 3095 times
P1020832.kl.JPG
P1020832.kl.JPG (197.59 KiB) Viewed 3095 times
P1020831.kl.JPG
P1020831.kl.JPG (204.3 KiB) Viewed 3095 times
User avatar
75evo
Verde
Verde
Posts: 820
Joined: Tue Oct 11, 2005 8:56 am

Re: 12v ITB's

Post by 75evo » Wed Jan 29, 2014 10:10 pm

Nice build! Is this a 3.0 or 3.2?

What brand are the con rods? Do they have the offset like the stock ones?
User avatar
Alfa 75 Racer
Gold
Gold
Posts: 50
Joined: Tue Jun 04, 2013 8:34 pm
Location: Austria

Re: 12v ITB's

Post by Alfa 75 Racer » Thu Jan 30, 2014 2:27 am

Hi Guys !

It´s a 166 3,0 V6 24 V and not a 3,2 Liter engine because of class regulations at my race series here.

Con Rods are coming from PPM Racing in Australia and they have the same dimensions as the standard 3,0 V6 24 V rods, just less weight and they are very very accure, weight is equal to 0,5 gramms.

I save a total weight on the piston / con rod sets of almost 1,87 kg for all 6 sets together, ... that´s very good I guess.

Crank is new plasma nitrited and polished, main and rod bearings are special once with a little more clearance acc. to Glenwoods / Kevins recommendation. Liners are honed to get same piston / Liner clearance of 0,09mm acc. to CPS recommendation.

Next step will be fine balancing of the whole crank assy. I will go for the factor 51% acc. to Jim´s recommendation.

Cheers
Wolfgang
User avatar
75evo
Verde
Verde
Posts: 820
Joined: Tue Oct 11, 2005 8:56 am

Re: 12v ITB's

Post by 75evo » Thu Jan 30, 2014 8:43 am

Actually what's the big deal about the rod offset? What if I bought the max speeding non-offset rods and machine the small end so it is as wide as the stock rod small end?

I don't even know the logic behind an offset rod.
Greg_Sef
Silver
Silver
Posts: 7
Joined: Sat Feb 20, 2010 6:58 pm
Location: Huntington, NY, USA

Re: 12v ITB's

Post by Greg_Sef » Sun Feb 16, 2014 2:56 pm

75evo wrote:Actually what's the big deal about the rod offset? What if I bought the max speeding non-offset rods and machine the small end so it is as wide as the stock rod small end?

I don't even know the logic behind an offset rod.
I have OEM, Max speed and PPM connecting rods that I have just finished measuring. In brief, the bore centerlines and crankpin centerlines are offset on the V6 motors. The OEM rods are approximately .028" to .032" offset. Alfa made the offset in the big end which would be the best place structurally to do it. The rods are offset opposite for the right bank versus the left cylinder bank.

Aftermarket rod manufacturers seem to always do it in the small end because it is easier to do it there.

The Max speed rods are symmetrical with no offset, the small end width measures .932" which is just a few thousandths less than the OEM at .934" to .936" This difference doesn't matter at all.

The PPM rods have an offset of about .022". The offset is in the small end. The small end width measure just a .001 wider than the above rod.

I wrote Max Speed asking about the lack of offset and they asked if I could send them an OEM rod for them to look at.

I have no idea what Carillo's rods look like.

IMHO the offset doesn't really matter much if at all. Just as long as you don't do like the builder of my motor in my GTV6 race car and install the OEM rods in backwards. Then they are double the offset wrong. (.06" off) The rods small ends were up against the pistons.

Greg
1972 Berlina Vintage Race car
1974 GTV Race Car
1982 GTV6 EP Race Car
"Angelina" 1987 Milano / 75 24 Hours of LeMons Race Car (best race car of the bunch)
User avatar
75evo
Verde
Verde
Posts: 820
Joined: Tue Oct 11, 2005 8:56 am

Re: 12v ITB's

Post by 75evo » Sun Feb 16, 2014 3:43 pm

GregSef,

RJ said the same thing on the BB wrt the offset.

I just got my set of rods. Will commence my 3.2 24V build soon.

I think my 3.0 12V will be up for sale. But it needs megasquirt or something. L-Jet will not run it.
User avatar
LacUS
Silver
Silver
Posts: 17
Joined: Thu Jan 07, 2010 11:05 am
Location: Hungary
Contact:

Re: 12v ITB's

Post by LacUS » Wed Jul 30, 2014 1:59 am

Hi!

My ITB projekt is made from Triumph Speed Triple throttle bodies. As it's a low cost test for me, I've used what I have in the garage. So the intake pipes are from 2.0 V6TB engine, the couplers are from a 3.0 24V, the fuel rails will be made from a the V6TB engines fuel rail. So here are some pictures.
Image

Image

Image
LacUS
Image
Post Reply