LS7 based 440cid dyno numbers
Definitely the red headed step child. Not real sure why there is not more aftermarket support for it (or more rect. port aftermarket heads out yet either for that matter) You would think with what the aftermarket was able to do with teh Cathedral's, and improve upon that so much, that their eye's would have popped out of their head when the rect. port stuff came out.
I GUESS, that with teh economy, and not knowing what people would be doing, might have something to do with it
I just would have thought we would have seen some stuff out by now. Heck, the Vic Jr. just came out, what, 2 months ago for it? 
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Definitely the red headed step child. Not real sure why there is not more aftermarket support for it (or more rect. port aftermarket heads out yet either for that matter) You would think with what the aftermarket was able to do with teh Cathedral's, and improve upon that so much, that their eye's would have popped out of their head when the rect. port stuff came out.
I GUESS, that with teh economy, and not knowing what people would be doing, might have something to do with it I just would have thought we would have seen some stuff out by now. Heck, the Vic Jr. just came out, what, 2 months ago for it?
I GUESS, that with teh economy, and not knowing what people would be doing, might have something to do with it
I just would have thought we would have seen some stuff out by now. Heck, the Vic Jr. just came out, what, 2 months ago for it?I think you are right. I like the L92 heads for a hydraulic roller car with a big engine with that LSXr intake!
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Verdad Gallardo Yeah, definitely! That LSXr intake looks killer
My motor will be dynoed with teh Vic Jr. in teh next couple weeks. Heads are almost done.... springs, locks, retainers coming in this week. Valves are here. Just have to setup the heads. New cam is ordered. Shortblock buttoned up (aside from cam). Gonna be dynoed with a GMPP carb intake and The Vic Jr. Will post up results at that time.
Again, you bet!
Thread Starter
Launching!
Joined: Feb 2004
Posts: 271
Likes: 0
From: California
Case in point - I also have a VW Touareg. Basically the same engine as the Porsche Cayenne but different "Porsche designed" heads and cams
TECH Fanatic
Joined: Apr 2008
Posts: 1,775
Likes: 0
From: Shillington PA
Hi guys,
Just starting some initial research on 440ci long / short blocks. Short block option would use locally (Aussie) ported LS7 heads. As far as I can see, there are a few off-the-shelf options:
LME 440
Texas Speed 440
SDPC 440
I am wanting to put this in a M6 C5 Corvette for 70% track / 20% street use. Need info on high compression N/A setups that are not too sick in traffic. This would be using a custom twin-plenum ITB manifold. What are realistic rwhp goals and street manners? Fuel economy, max RPM etc?
Any comments from members with the above supplier engines?
Just starting some initial research on 440ci long / short blocks. Short block option would use locally (Aussie) ported LS7 heads. As far as I can see, there are a few off-the-shelf options:
LME 440
Texas Speed 440
SDPC 440
I am wanting to put this in a M6 C5 Corvette for 70% track / 20% street use. Need info on high compression N/A setups that are not too sick in traffic. This would be using a custom twin-plenum ITB manifold. What are realistic rwhp goals and street manners? Fuel economy, max RPM etc?
Any comments from members with the above supplier engines?
I am not sure why GM didnt just go with the LS7 style head across the product line. It seems like it may have been a marketing decision more than engineering (i.e. the Z06 gets a high end head and the rest get a lower end/HP design). I mean, how much more does it cost to cast a LS7 compared to a L92...?
Again, anytime you look at something and go, "if they only made it this way," it probably saved them a few million dollars to do it the way they did.
You have to see it from 1 million being produced, not 1000
Yeah, now THAT's funny! LMAO
Now, THAT would be cool!
To answer your question, anytime GM makes a decision, it is based on the almighty dollar. So, if they were to use the LS7 head across the board, it would cost them roughly lets say on a production level around $100/set to have them CNC'd. So, now, if you are making around 1 million set's of L92/LS3 heads per year, you can see where that is going to put a huge crunch in the budget.
Again, anytime you look at something and go, "if they only made it this way," it probably saved them a few million dollars to do it the way they did.
You have to see it from 1 million being produced, not 1000
Again, anytime you look at something and go, "if they only made it this way," it probably saved them a few million dollars to do it the way they did.
You have to see it from 1 million being produced, not 1000
Can't say I agree with you on that. What's to say they have to CNC them for ALL motors?
They could just have easily cast them, sent Z06 stuff down X line and rest of 'em down Z line. If ANYTHING, it might have cost them MORE to produce both sets of heads Tooling for 2 sets of heads. Design for 2 sets of heads. How many people now need jobs to design, produce, run machinery for 2 sets of heads instead of 1?I am not sure why GM didnt just go with the LS7 style head across the product line. It seems like it may have been a marketing decision more than engineering (i.e. the Z06 gets a high end head and the rest get a lower end/HP design). I mean, how much more does it cost to cast a LS7 compared to a L92...?
Thread Starter
Launching!
Joined: Feb 2004
Posts: 271
Likes: 0
From: California
Can't say I agree with you on that. What's to say they have to CNC them for ALL motors? They could just have easily cast them, sent Z06 stuff down X line and rest of 'em down Z line. If ANYTHING, it might have cost them MORE to produce both sets of heads Tooling for 2 sets of heads. Design for 2 sets of heads. How many people now need jobs to design, produce, run machinery for 2 sets of heads instead of 1?
They could just have easily cast them, sent Z06 stuff down X line and rest of 'em down Z line. If ANYTHING, it might have cost them MORE to produce both sets of heads Tooling for 2 sets of heads. Design for 2 sets of heads. How many people now need jobs to design, produce, run machinery for 2 sets of heads instead of 1?
To answer your question, anytime GM makes a decision, it is based on the almighty dollar. So, if they were to use the LS7 head across the board, it would cost them roughly lets say on a production level around $100/set to have them CNC'd. So, now, if you are making around 1 million set's of L92/LS3 heads per year, you can see where that is going to put a huge crunch in the budget.
Again, anytime you look at something and go, "if they only made it this way," it probably saved them a few million dollars to do it the way they did.
You have to see it from 1 million being produced, not 1000
Again, anytime you look at something and go, "if they only made it this way," it probably saved them a few million dollars to do it the way they did.
You have to see it from 1 million being produced, not 1000
Uniqueness allows for marketability. L92's for higher production engines, LS7's for enthusiast applications.