What are the pros & cons of using the L92 block vs the LS2 block w/ 4" bore in a N/A application?

 

None at all I can see. I used an L92 crate motor for my stroker. After getting rid of the DOD and cam phaser stuff it is pretty much a large bore LS2. Nothing but GOOD!

 

Are the prices similar? What's involved in removing the DOD & cam phasing stuff?

 

W2W did my motor but as far as I can tell. You use a normal LS2 vally plate to get rid of the DOD stuff. Take out the cam pharser stuff and cam. Put in a normal cam with LS2 cover , gears and chain. Boom, its a big bore LS2. I might have missed something but as far as I can tell its that easy.

EDIT: Oh and lifters too.

 

Either I missed it or it wasn't posted... is there a part number for an assembled L92 shortblock?

 

What compression is the stock l92 short block, and how much power can it handle? Forged pistons, or cast pistons?

 

10.5:1 according to the first post. they're cast pistons.
has anyone received L76 intakes from parts suppliers yet?

 

Im guessing Im the only one

 

I have a friend thats a manager for GM parts. I am trying to see if I can get a few from him. If I can I will pass them on this way.

 

subscribing. lots of good info here. Keep it coming guys!

 

i am able to get a 6.2 motor trans wiring harness and computer right now for my 2000 camaro what all do i have to do to install it far as making everything work like a/c guages etc. id like to use that 6 speed auto would be nasty let me know what i need thanks also do they work well on nitrous ive been hearing ls7 have been tearing up with nitrous due to the rods and other things

 

Wont work, wont comminicate with the modules in your car. Different protocol/bus system. Better off changing the engine back to 24X electronics with a mechanical 90MM and run a compatible trans.

 

Did a search but came up short. Anybody know if GMPP or anyone else is gonna have a carb manifold for the L92 heads?

 

I checked for the carb manifold PN 25534401 for the L92 heads and couldnt find it on GMPP's site. Any help?

 

I just ordered my L92 carb manifold today for $299 plus shipping.
I should have it in a few days, I will post some pics when it is in.
I ordered the L92 complete heads since the bare heads are still on backorder.
Also, I am not sure if anyone is making performance valves for this head yet.
BTW, the L92 efi truck manifold is available too for about $195.
Can't wait to get my twin turbo setup this winter!

 

Here is some more exhaust data for you guys............

TEA's bench info shows some different results from what I have seen so far.

WCCH Exhaust port tested without pipe (4.155” bore).

.100 63.1
.200 121.1
.300 156.9
.400 176.1
.500 187.9
.550 191.4
.600 193.7

TEA w/ a pipe now

.100 54
.200 122
.300 176
.400 214
.500 231
.550 238
.600 241

Difference

.100 -9
.200 1
.300 19
.400 38
.500 43
.550 46
.600 47


Normally I don't see that big of difference with a pipe and without, so it's hard to take this as evidence of what the stock exhaust actually flows with a pipe to me. Normally you see 10% maybe at the most, this is showing double that.

Bret

 

Thanks for the info!
I am going to put the assembled as cast L92 heads on my twin turbo
project this month to see what real world performance they offer.
I am a little concerned about using the stock valves with a turbo though.
Do you think the stockers will live at 15psi of boost at 6,500rpm?
I will be running twin 55mm turbos with 1.21 a/r housings to keep the exhaust temps down, and to soften the power curve on the street.
Do you know if anyone offers Inconel exhaust valves for these heads yet?

 

With the pipe flows are important.

Because while we see it is possible for a port flow to go up with a pipe, it is also possible for it to go down. Pipe should simulate typical header tube that will be bolted up.

Exhaust side is ported with great consideration to how flow is affected with a pipe in place.

Same on intake side, a optimal method might be to take several inches of typical runner that will be bolted to it, port the intake side with consideration to a runner that it should be used with.

On BBF there are still some trying to get max out of stock or old heads. What I found interesting is some of them were able to get ports to increase in flow, with the right ported manifold. Most of the time flow losses where minimized.

The L92 head manifold is doing great where the intake knocks off max of 20CFM. This can be improved upon and even 5% will be worth something.

A couple have gotten the LS7 manifold smothed and ported with ported intake side of head, to flowing what the LS7 heads do stock or 360CFMish.

Is possible on the bigger combos to maybe need a 1" or 2" trimmed off the runner length ( is this possible ? ), to max out the higher rpm TQ curve.

 

Are u having the exhauts ports done up or are u leaving them stock. I know we talk about this on here before and alot of guys were saying that thease heads stock wouldnt be a goood turbo head.

 

I will be changing out the springs of course, so aside from minor blending while the valves are out, I am thinking of trying them as cast to see what they are capable of.
I'm sure the production castings will not have as much as the aftermarkets
so I would like to keep the casting as durable as possible.
One of the big reasons to use the L92 is the price, so I think that testing
the heads unported will give helpful information to people like myself trying to make good power without breaking into the kid's college fund too much.
I don't have cubic $ to spend, nor am I trying get every last horsepower out of the setup. My goal is to see what these will do at 10-15psi of boost in a streetable build that doesn't need a ton of maintance. We shall see...
I am new to this forum, so I am not sure if some people have actually used these heads on a turbo build before. Flow benches don't tell the whole story.
Sometimes you just need to put something in a car and drive it to see if it works for you. After all you are building the car for you, right!
Why do you think the l92's would these be a poor choice for a turbo engine?
I have heard of quite a few people making big numbers with stock LS1 heads,
so I would have to think that with the matching carb intake and an elbow these should be able to put down some good HP numbers as is.
The price is right for sure!