Originally Posted by Greg Fell

I'm going through this exact process now and have placed all the orders, it should be in that 11-14k range.

I'm going with an LME 440, TFS 235's, a 25x/25x cam, and a ported Fast 90 and ls2 tb.

From what I've been seeing, it seems like the cathedral port stuff is making the best average power. May want to consider this style.

Originally Posted by jermzz

Has there been any 440+ ci motors running ls7 stuff on here yet tuned and ready to go?

link me if so. interested.

Originally Posted by racer7088

I think Vengeance did some a while back or someone and I have done many as have others. They run pretty good but most don't really get into the LS1Tech posting game. I know of some that are on here and will post their results though soon probably. They make from 575-650 at the wheels depending on how radical they are. You can basically run a smaller cam with the LS7 stuff is probably the best plug for it and the LS7 manifold can pull a little higher in rpm as well but the cathedral port stuff is also very very good.

Originally Posted by Greg Fell

In peak rwhp, it may. But a sheetmetal ls7 is a 5k rpm+ motor or it will be a dog. In most applications below 7200 rpms or so, the cathedral port stuff is still hard to beat.

The vengence 454 did 625 but was a tfs 235/fast 90. Perhaps they did an ls7 set up also.

Originally Posted by WeberRacingEquipment

Not giving a warranty has nothing to do with the quality of work performed. There are just too many things that a customer can do that is out of our hands.

Example #1-
Say we install a motor and were able to tune the car in house. Lets say the car has a Procharger on it. The customer gets the car home goes to the track and wants to get a better ET. The customer changes pullies to add another 10 lbs of boost but does not change the tune. Motor goes boom. Put the pullies back on and say its our fault?

#2
Customer has us build a 14.1:1 solid roller race only engine. Customer decides a year later he wants to street drive the car a little and decides to start using pump gas and gets a crappy batch of fuel, lays into the car hard on the highway detonates the bearings out of it. That is our fault?

#3
Customer does not like to change oil or do any maintence. Not to mention he took his air filter out at the track to pick up some ET/MPH. Debris gets in the motor and scores the bearings. This results in a failure.

#4
Customers car is a 6 speed. Customer isnt familiar with new found power and bangs the car off the limiter at every shift, maybe misses a shift and bends valves. This again, not because we built the engine wrong.

I can go on forever with these scenarios and why we cannot give out a warranty with our high performance applications. There are too many variables that are out of our control.

We have not had a warranty for 40 years, nor do I see us giving one. We have not been around for 40 years because of crappy quality either I can assure you that. We have been around for 40 years because we have the equipment and the knowledge to build engines that make power and last in racing and street applications alike. Our reputation speaks for itself, we do not need a warranty to validate that.

Originally Posted by jermzz

.

Not that i'm ******* cathedral port heads, they've been proven time and time again here. Maybe it's the fact that not many people are playing with the ls7 stuff cause it's expensive and relatively new? Maybe they havn't totallt figured it out yet? I intend to find out either way!

Originally Posted by 99blancoSS

Maybe you just dont want to hear the answers your getting. You have a hardon for a sheetmetal intake or a vic so you wont accept any answer that detracts from that.

What ever.

Originally Posted by jermzz

So you're telling me, just cause it has a ls7 style sheetmetal intake, that a 440 - 454ci motor with ported ls7 heads under 5k rpm it will be a "dog?" For some reason a doubt that.

Originally Posted by jermzz

I just have a hard time believeing that given the same cubic inch motor, that a cathedral ported GENIII head with a ported fast 90 strapped on it is going to out perform a LS7 headed sheetmetal intake setup. Pretty much anywhere in the band.

Originally Posted by Greg Fell

yes. now maybe we should not use 'dog' as that is open to interpretation. however, on the same size motor, a small intake runner fast 90 setup (ie an afr 225, tfs 235 etc) will have WAY more power than a sheet metal intake ls7 combo below 5k. you're missing the point of a sheetmetal if you think otherwise.



dont believe, thats fine. runner length has a massive effect on where a motor will make power, just like a camshaft, head characteristics, etc.

fwiw, i had an ls7 top end and am going back to a cathedral port setup.

Originally Posted by jermzz

I understand that the runner length plays a part in the power band, but I also believe people make it out to be way more of a big deal then it is. Like the car won't wanna move below 4k rpm.


I'm open to either right now on my setup. But all i'm looking for is some solid numbers from some ls7 stuff to make the decision more concrete. If nobody does it, who's to say it won't work? How was your setup with the ls7, why are you switching? What was your setup / numbers?

Originally Posted by 99blancoSS

Well to be honest I wasnt tryng to be with that statement. It was a shot at the truth to make you open your eyes. You want a sheet metal or Vic intake am I wrong?
You've been told I dont know how many times and there are threads to this fact as well that the sheet metal or Vic won't do any good until after 5000 rpms.
And I'm the dick? You dont listen to anyone who says no to the intake you want and yet I'm the dick. OK, I'm a dick. But at least I'm not so ******* stubborn that I dont just listen to myself and decide that I know whats better over someone who makes a living at it.

Only reason I popped back into the thyread was I saw Racer posting some info and wanted to see what he said. Otherwise I'm unsubscribed to it, its a waste of time.

Originally Posted by Greg Fell

i had a 422 (4.100x4) with hand finished ls7 top end, a 246/257 112. It struggled to make 500 rwhp. Now I know this is an exception and not the rule, as lots of LS7's make good power. Just like anything, I've known a few who didn't however.

I think that getting caught up in flow numbers can be misleading, the ls7's look sexy on paper and a flowbench but they are also flowing that much air through 280 cc'ish runners. As an example most of us know, the AFR's make sick power and have stellar track results....they don't have big flow numbers but they flow well through small ports.

Keep in mind the exhaust ports on the LS7's are not up to par with the intake. A TFS or AFR head has much better exhaust ports and can still flow 340-350+ or so.

'When in doubt, hog it out' doesn't always work as well as it should/could.

Originally Posted by Stang's Bane

I would hazard a guess and say that more LS7 heads are screwed up by porting the intake side than helped. More cfm does not always equal more power..