368 parts

[LGAFF]

What all do I need for a 368...

LA Sleeve/4": $1200
JE Pistons: Part #?
Rods: Part/Manufacturer????

Cost of Hone the Block????

[Pete]

Why?

you can use stock rods if you want.


Pete

[LGAFF]

So I just need Pistons/Sleeves and honing?

[Pete]

So I just need Pistons/Sleeves and honing?


&

balancing

Pete

[Polo-1]

Lee I can hook you up with a set of 368 JE pistons for stock rods and the crank that they were run on (balanced for 368 ). You should also ask me about the 380ci motor option :-)

http://i7.photobucket.com/albums/y292/kpie/IMG_2423.jpg
http://i7.photobucket.com/albums/y292/kpie/IMG_2422.jpg
http://i7.photobucket.com/albums/y292/kpie/IMG_2421.jpg

[LGAFF]

Let me know your thoughts on price....thanks

[scholtmj]

Lee I can hook you up with a set of 368 JE pistons for stock rods and the crank that they were run on (balanced for 368 ). You should also ask me about the 380ci motor option :-)

http://i7.photobucket.com/albums/y292/kpie/IMG_2423.jpg


Do performance LT5 parts grow on trees in WA?? Tell us more about this 380 option....

[Polo-1]

I just have a bunch of stuff, still...

As far as the 377/383ci goes it uses the stock crank. Doing a 368 and not jumping up to the 377/383 is nuts. The cost is under $400. The added torque on the motor will jump from 370's to 420's. Lets put it this way, you spend $15.5 to get a 368 and you left up 50rwtq on table for only $400. The build cost the same ( - the $400).
King Bearing makes the special rod bearings that are 1 piece, this is a big plus. This stops the need to buy aftermarket rods ( more money not needed at this power level ).

[sammy]

are you talking about offset grinding the crank?

[GOLDCYLON]

Lee I can hook you up with a set of 368 JE pistons for stock rods and the crank that they were run on (balanced for 368 ). You should also ask me about the 380ci motor option :-)

http://i7.photobucket.com/albums/y292/kpie/IMG_2423.jpg
http://i7.photobucket.com/albums/y292/kpie/IMG_2422.jpg
http://i7.photobucket.com/albums/y292/kpie/IMG_2421.jpg


Ah motor porn!!!! Im going the 380 route with Kevins help already. Best bang for the buck on a budget stroker. GC

[todesengel]

Ah motor porn!!!! Im going the 380 route with Kevins help already. Best band for the buck on a budget stroker. GC

That would be pretty nice with 9.0 compression and closed deck for forced induction.

[Polo-1]

are you talking about offset grinding the crank?

Yes.

[Polo-1]

That would be pretty nice with 9.0 compression and closed deck for forced induction.

The only one I know that does the closed deck is Marc. The block work only is more then GC whole build;)

If you are talk forced power it would be $$ up and I would not recommend a cut crank and stock rods.
I had a 402 set up for 250-300 shot, and the crank was more then GC shortblock..

[todesengel]

The only one I know that does the closed deck is Marc. The block work only is more then GC whole build;)

If you are talk forced power it would be $$ up and I would not recommend a cut crank and stock rods.
I had a 402 set up for 250-300 shot, and the crank was more then GC shortblock..

I know of another who does the closed deck.

Stock rods do not bother me on a fi build, depending on effective compression ratio. I would be more concerned with the block design, and crankcase ventilation on these motors than the rod, but that may just be me.

"most" rod failures I have seen were tuning disasters, oil starvation, or contamination based. I am talking in general here, not specific to the lt5. I do not have enough experinece with the lt5, nor have I seen rod failure on one due to fi. Of course, I really haven't seen many that were fi :)

[LGAFF]

http://www.zr1.net/forum/showthread.php?t=8039&highlight=closed+deck

[DaveK]

For the uninitiated, what's the cost on doing these kind of mods? and what are the expected ballpark results? Just curious.

Dave

[flyin ryan]

LT-5 rods are not your typical regular passenger vehicle rods, fairly beefy. I wouldn't be in a hurry to change them out. Also, if you might be thinking about changing them out for a set of the China 'H'-beams that out there, do yourself a favor, that's not what I'd call an 'Upgrade' :neutral:.

[RICKYRJ1]

For the uninitiated, what's the cost on doing these kind of mods? and what are the expected ballpark results? Just curious.

Dave

Same question :proud:

[GOLDCYLON]

That would be pretty nice with 9.0 compression and closed deck for forced induction.


Agreed but why too much coin for my budget stroker.

[sammy]

Ah motor porn!!!! Im going the 380 route with Kevins help already. Best bang for the buck on a budget stroker. GChow are you getting to 380 inches .i would love to hear more detail on the subject and costs if you know .

[tomtom72]

For the uninitiated, what's the cost on doing these kind of mods? and what are the expected ballpark results? Just curious.

Dave

Yes please, grasshopper would love to learn more also. :happy1:

:cheers:

[LGAFF]

Do it your self

Cam regrind $1000-$1600
Port Heads/Valve Job: $400-500(If you port yourself)
Port Intake
Sleeves $1400
Pistons 800
Gaskets $500-1000
Hone Block $300-If you have a torque plate already....plate is $600
Balance $250

Expected HP 550-570hp
Haibeck is about $15K

[WB9MCW]

Do it your self

Cam regrind $1000-$1600
Port Heads/Valve Job: $400-500(If you port yourself)
Port Intake
Sleeves $1400
Pistons 800
Gaskets $500-1000
Hone Block $300-If you have a torque plate already....plate is $600
Balance $250

Expected HP 550-570hp
Haibeck is about $15K

SOME DAY -- I want to order up a "LGAFF/PETE special build" when I become rich and famous again and can afford it. :cheers:

PLUS -- How does one get that "special Insurance" that actually will cover you if you smack up the vette at the Drag Strip?? I know my current one is no good for that.

[GOLDCYLON]

how are you getting to 380 inches .i would love to hear more detail on the subject and costs if you know .


According to Polo-1 its going to be a 379. Grind to the stock crank already done buy a shop in Colorado, over sized JE Pistons and lots of other goodies. Kevins block was already prepared, Sleeved ETC tuff skirting will be involved and Im am thinking of having locobob port some heads (Tuning in Cliff?)for me as well. Looking to laydown no less that 475-500 to the rear. No where near Frank Urbanti's raw power but nowhere near the coin of the 441 either (I am well out of Franks league). Fridanza as well already waiting in the garage. Kevin seems to think no problem hitting that number. Maybe a Corey tune after its all together especailly after seeing what Corey did to Brad's your SNAT. Damn impressive. The goal was more power for a daily driver. I do not want an overall cammy beast but if Pete would ever come to AZ I damn well let him have a go lol. GC

[LGAFF]

Condon and Skelly will cover you if at a club event.

[DaveK]

Do it your self

Cam regrind $1000-$1600
Port Heads/Valve Job: $400-500(If you port yourself)
Port Intake
Sleeves $1400
Pistons 800
Gaskets $500-1000
Hone Block $300-If you have a torque plate already....plate is $600
Balance $250

Expected HP 550-570hp
Haibeck is about $15K

I can't do any of that myself, so I'm SOL :)

[GOLDCYLON]

I can't do any of that myself, so I'm SOL :)


Me neither... so I am grateful for all the help from the brotherhood. lots of great folks here who have been there done that already. But rest assured in 2021. A White ZR1 will also be in my garage right along side this ZR-1... Almighty willing. GC

[RICKYRJ1]

Do it your self

Cam regrind $1000-$1600
Port Heads/Valve Job: $400-500(If you port yourself)
Port Intake
Sleeves $1400
Pistons 800
Gaskets $500-1000
Hone Block $300-If you have a torque plate already....plate is $600
Balance $250

Expected HP 550-570hp
Haibeck is about $15K

Give or take 6grand(more give) one could expect that kind of power? Seems like a performance bargain to me. Can some of our engine guys step inside and give their thoughts?

[LGAFF]

http://zr1specialist.com/HAT%20Web/presentations/Upgrade%20Paths1b.pdf

[LGAFF]

Not sure if I am going 368, but if I do car will also weigh in at only 3100-3200lbs

[tomtom72]

I can't do any of that myself, so I'm SOL :)

I agree Dave! God, it was soooo much simpler on my 72 LT-1 to create extra power! I don't even know a machine shop that I would trust in my neck of the woods to do a simple valve job on a set of LT5 heads!

I suppose I should go hang out at the ricer shows....them guys should know where the machine shops are to get DOHC/4V alum. motors done right?
:cry:

[DaveK]

Tom. I don't trust the local GM dealer to touch my Z! Seriously, they haven't got a clue. The only work they ever did for me was install a set of speedometer correction gears when I first bought the car (it came with 4.10s but the correction hadn't been done).

It took them 5 days to do it, they insisted some gasket needed changing at the same time (despite Marc H's advice to the opposite) then they managed to destroy the replacement gasket and had to order a second. On top of that they found the oil pan was leaking and said I needed a new oil pan gasket. From this wonderful forum I found that often the pan bolts come loose so I suggested they check those and tighten them.

When I finally got the car back I found that they had thrown the original speedo gear in the trash (I made them retrieve it) and then they said, "oh and its still leaking". I asked if they had checked the pan bolts and they hadn't. I checked them at home, they were loose - tightened them and the leak "magically" vanished.

So anything that I can't do myself now will go to someone who knows what they are doing - JVD, Marc H etc. even if it involves driving half a continent :)

Oh and later when I found my VSS was failing I bought one and just installed it myself. :icon_thum

[flyin ryan]

I agree Dave! God, it was soooo much simpler on my 72 LT-1 to create extra power! I don't even know a machine shop that I would trust in my neck of the woods to do a simple valve job on a set of LT5 heads!

I suppose I should go hang out at the ricer shows....them guys should know where the machine shops are to get DOHC/4V alum. motors done right?
If you guys are running into that much of a problem not knowing or trusting anyone in your area to deal with your heads & your willing to ship, I'll do them for you.

[LGAFF]

If you guys are running into that much of a problem not knowing or trusting anyone in your area to deal with your heads & your willing to ship, I'll do them for you.

For Free! Thats nice of you Ryan!

[DaveK]

Thanks for the offer Ryan, much appreciated - personally I'm a long way off doing anything like this just now so it's not a critical thing. Most general maintenance I can handle myself. Working on getting the garage in to allow me to do a few more of the basic upgrades.

Actual engine work - porting, cams etc. I would always have to look elsewhere for - I don't have the skills or facilities for that kind of work.

[flyin ryan]

I'll ignore Lee's remarks....Wouldn't expect anything else :rolleyes:.

I'm not looking for work but just sayin', if you guys are having trouble finding someone you trust, no biggie, I can take care of them, if need be.

[GOLDCYLON]

I'll ignore Lee's remarks....Wouldn't expect anything else :rolleyes:.

I'm not looking for work but just sayin', if you guys are having trouble finding someone you trust, no biggie, I can take care of them, if need be.


Ryan thats a fine offer to the community. Having met locobob and following Dynamites heads update I dont think I have the time, tools and patience as its a hellva lot of work. Bob is always busy busy busy so I might send you my heads when the time comes if Bobs too busy. GC

[tomtom72]

:o Lee, sorry for hi-jacking your thread.

Ryan, Thank You. I don't know what else to say except that it's for sure the people in our band of brothers that make this a special place to be. Thanks. I like Dave will not be taking anything apart....I don't own a garage, never reassembled an LT5, & to be truthful if it doesn't itch, I ain't gonna scratch! If I can do it in my parking space then fine, if not I look for some one I trust to do the simple stuff.


Dave, I've been lucky, sort of, with dealers in that they have been honest with me & my Z. General repairs like suspension & maintenance results have been very good experiences. They always have been fair and when it comes to the motor the Techs have been honest...."I hope this lasts like GM said it would because we can't help you with internal motor issues." or I get this one a lot..." Wow, is this that Lotus motor!? I've never even seen one of these!" .... or from the few Techs not retired that are my age...." Oh man I haven't seen one of these cars in 10 or 15 years." I can't speak badly about people that are at least up front with me.

:cheers:
Tom

[DaveK]

Also apologies for inadvertent hi-jacking.

The GM Dealer here has a very bad reputation with everyone in our local club. I think the only business they get is from cars under warranty.

More on topic, I have the experience to rebuild engines (though no place to take on such a job right now. But when it comes to grinding heads/plenums etc. I would be entirely lost. If I could program my PC to do it I might stand a chance :)

I love seeing what you guys do though - it's fascinating to see the LT5 being extended and improved in so many ways and getting an insight in to how far these incredible engines can be pushed. But I'll be leaving any of those mods to people with the knowledge and experience to do them properly.

As the great Inspector Callahan said "It's a wise man who knows his limitations"! :)

[Polo-1]

Lee dont care.. He's getting a set of 368 pistons from me ( almost free).