Hello all,
I have a few questions. Ive used the search button and alot of info comes up but its a few years old. I Just wanna make sure what worked back then is still the way now. Like the head gasket, alot of people were going with bored out evo 9 hg. Is that still the route or is there a better head gasket out there now. My goal is 700-800whp on a 6766 or 6466. Right now im just doing research, i have a 03 roller ima put this build in. And i really want to try the 162mm rods on the 4g64 block, i think they call it super long rod destroker. Thanks for the info.

 

m in the same boat. Also looking to do a 2.1 so if anyone has any updated info to share about the HG or anything else related to the 2.1 I'd greatly appreciate your input.

 

there was a thead on a DSM forum that covered some of the things you need for each type of stroker / destrocker...etc. Ill try to find it when im at my computer.

 

Instead of making a new thread I'll bump this. This has been discussed in the past but a new year brings new technology and knowledge.

Interested in how people are keeping head gaskets sealed at 800-900whp on the larger bore block. I've seen some say no o-ring while others say o-ring is a must. Some even go as far as an o-ring and a receiver groove.

I'd almost rather spend big money on the 625 head studs and run no o-ring. JE makes the proseal that's slightly bigger diameter than the cylinder(87.5mm) in multiple thicknesses.

I do realize the tune up and torque control is the most important thing in keeping the head gasket sealed.

 

Yo up need to oring it. It's not even that expensive to do. I think it was an extra $200 for HeadGames to do it in mine.

 

Not 2.1 but Curt Brown is currently building a LR2.4 for me. Several people here stated that they had success over long term using the JE HG, and I asked Curt which head gasket he likes and he said the JE, and obviously I trust Curt's opinion. It's easy to get and not very expensive. I am not sure whether it's the best HG for O ringing though or whether it matters a lot.

 

What power level are you aiming for? I don't think people are experiencing head gasket failures until north of 600-700whp.
op

 

My current goals are under 600whp but of course we always want to future proof a block as long as the work isn't contradictory for current and future goals. IIRC the members who said they had success with the JE Proseal were 700whp, don't know if all were o-ringed. Curt said he trusts the JE Pro Seal HG to 700whp. I inquired about o-ringing he said it's only necessary 700whp<. I did not ask about which HG for o-ringing because that does not apply to me.

The OP stated whp goals but not whether he planned to o-ring, so I was just reiterating what the most recent common consensus for off the shelf HG options for the 4G64 was.

 

Building a motor to rev more than the 2.0 seems pointless unless several other things are done as well. Id go with bigger motor to pull the powerband down.

Trans/Clutch just doesnt care to shift at high RPM, going higher only makes that worse. So Dogbox/faceplating/Sequential soon become a necessity. Also oil system, factory pump at a min needs to be under driven, but if you're going to be pushing 9k+ then I wouldn't do it without an drysump or maybe the FLF front case pending oil pump testing.

 

This. It was a no brainer for me to go LR2.4. Having a 10K RPM block built and slapping a big turbo on it is the easy part. Meanwhile you can have 90% of a 2.1's actual real world results potential with way more torque way earlier and more reliably in regards to what Dallas J said with a LR2.4 or 2.2.

 

A standard geometry 4g63 2.0L revs to 11k just fine. The 2.1 destroker is pointless. Building it with your super low power goal is silly. Put a 94mm crank in your 4g63 block with 150mm rods. It'll rev as high as you need it to (or go to 9500 with the right combo to make power up there) since you'll be running a stock intake manifold and small cams with that power goal. Then you'll get the nice mid range torque and spool the turbo faster. And no tricks needed to keep the 4g63 head gasket sealed below 800ish wheel.

 

ok so in my case I only have a 4g64 block and I want to build it and attempt to make around 900 hp would you say keep it 2.4 or do a 2.2 2.3 ???? Help

I’ll be using super99 turbo

 

2.2l

 

100% a 2.2L. Stick a 94mm crank in that thing with 156mm rods and let it eat. But, beware that 900-1000 is around the limit of the 64 block as the cylinder walls are a bit thinner than the 63 block.

 

who sells the crankshaft i have heard about Manley one cracking on journal 4