so ive been going back and forth about buying a 6.0 block and stroking it, or buying a set of liners and making them work. i finally settled on the 6.8 with the 5.3 crank stroked to the 6l stroke and using 1.888 journal nascar rods. what convinced me was that the 5.3 cranks are a dime a dozen, where as i struggled to find a 6l crank. so if i spin a breaing. im SOL. which was highlighted in a conversation with my dad.

SO i need help finding some things, does anyone know where i can get some 96mm liners? i know rob beeres has them and westwood cylinder liners has them. im still trying to get a hold of them. After that i am going to get a set of custom dish forged pistons made (flathead motor) from Diamond pistons. a little pricy, but my track record.... AND finally after i will get a set of upgraded intakes from Bob Tilly with his group A set up.

i know ill end up talking to myself but i plan on documenting everything i do on this thread. hopefully to inspire people to be a little less afraid of modifying the jaguar v12

edit: I found out you can't cut the crank that much, so I have decided to build a 6.5 v12 using a 75mm stroke and a 96mm bore, leaving the same bore to stroke ratio as the stock 5.3

 

I'll be following along. I have a 5.3 with blown head gaskets sitting under a tarp waiting for me to decide what to do with it. What you're planning has crossed my mind a few times!

 

If youre interested ill throw you patterns for everything custom when im done (headgaskets etc)

 

As mine is the 5.3 block the patterns will be different, but ideas and suppliers are always valuable info!

 

Im starting wirha 5.3 block then stroking and boring it using a set of liners

 

Calvin,
I'll follow this thread. I have JagZilla's original 5.3 (with tediously ported HE heads) sitting on my garage floor. I want to punch it out to at least 7L (427c.i.), & I'm playing with the idea of lowering the compression enough to run either a pair of healthy turbos, or a quartet of smaller ones at 20-25 p.s.i. of boost on premium pump gas.

 

Just got a quote on liners 87 a piece. For 96mm bore. Can you post a pic of how they ported the he heads? Might behouve me to build a 6.8 he after the first one

 

$87 is not a bad price. I remember hearing prices around $120 each in the past. Who has them for that price, and how many sets do they have?

I ported the heads myself, using a Dremel with a flexible shaft extension (before I had pneumatic tools). I pretty much burned up the Dremel and went through several metal burs and at least a hundred sandpaper rolls. You can see a "before & after" example of the ports in my garage photos.

 

yeah 87$ from a company that makes custom liners. the problem I forsee is they don't have the beveling at the top, because I didn't want to make them that thin, so they wont have the water jacket clearance that the factory did, so im going to have to go and mill a little aluminum off each stud housing to make them flow better.

I would personally rather them thicker than thinner. I want to be able to push 600+ hp through this, and I don't like the idea of a 3mm wall with coolant on oneside and combustion on the other. destine for a crack there.

 

so I lied, I went with the rob beere liners. they were 40$ more and im purchasing them Monday! im having the crank ground to the 6l stroke and using 2.1 journal rods. hopefully this will happen next week. then deciding on.how to get my custom pistons. round dish of valve relieved.

ill be porting the pre he heads and relapping the valves. post some pics soon enough

 

Good on you Cal

What length rods are you planning on using 6.0"?

Be careful porting remember the GOLDEN RULE keep the port on the small side otherwise low end will suffer

 

I wont be opening the ports up much at all. they just have to be smoothed and the ridge at the top needs to be rounded out. and yes im using 6.0 rods prolly the h beam style due to their ability to rev up higher

 

Is that $40 more per liner, or $40 more per set? What made you decide to go with Rob Beere over your previously selected supplier?

 

the previous ones were from a custom place that I gave measurements to. and 40$ more a set 720 pounds.

 

I didn't see any for the V12 on the website. Did you have to call them to find the liners? Do they offer various bores, or just one size that is thick enough to be bored?

 

Cal have you seen this if not mif\ght pay to have talk to them

Builiding the 7.4 Litre Stroker Engine

Also when you have the crank ground have it modified for a lip rear main seal.

 

I called that guy warren and he wanted me to pay them for the information. idk abouf you but im not so.into that. even when I offered to.buy parts ge wasnt interested in talking.

 

jagzilla the liners are 96mm so shoot him an email or call him. he sells headgaskets too

 

update: started porting and polishing the heads today. ill post some pictures later, it was too dark in the garage to get a good picture.

 

How are those pictures coming??!?