[FrankieT/A]

Originally Posted by PAUL K

I'm not sure if the power level needs to be that high before it becomes "useless" for a street vehicle. A larger CID will help you get the "crazy fast" street car level easier and usually remain more driveable. It's also impressive at the cruise nights to have the "big" engine under the hood. I recall having a bunch of foreign exchange students shocked that I had a 7.6 litre engine in my 80 TA. They had never seen an automobile engine half the size, where ever they were from.

I agree 100% that's why I have been looking into the LSX454. I'm an old Pontiac guy that believes in no substitution for cubes. Owning several big Ponchos and LS's I equate it this way.

Big cubes equals instant power, LS is like a 2 stroke dirt bike, until you get in the powerband it leaves a little to be desired.

[Scott Roberts]

Originally Posted by FrankieT/A

I agree 100% that's why I have been looking into the LSX454. I'm an old Pontiac guy that believes in no substitution for cubes. Owning several big Ponchos and LS's I equate it this way.

Big cubes equals instant power, LS is like a 2 stroke dirt bike, until you get in the powerband it leaves a little to be desired.

Have u owned an ls?

[Scott Roberts]

Originally Posted by PAUL K

Just asking in regards to a recent conversation I had with a buddy. He was yapping about how bad azz LS engines are and they will out power bigger Pontiac engines. I was just wondering if any folks had first hand experience with the bigger engines?

Perfer real world information over Google. I've found Google to lead one to believe the Pontiac 557 block with destruct at three hundred horsepower and be safe to a thousand.... Chit there is even info on Google that says Chicago doesn't have a crime problem.

Do I need to mention Dave Adkins 427ci promod running 5..90' s at 247mph?
Ls for the win...

[PAUL K]

Originally Posted by FrankieT/A

Paul,
Even Butler is doing LS's now get with the program...

Originally Posted by FrankieT/A

I've been on here a long time and I know Paul's experience with Poncho's BUT if he is building LS's too then he's just stirring the pot because he knows better...

We've been building LS engines from the beginning.. Back in the day we were porting LS heads for three of the largest LS shops in the world. As a matter of fact, during that same time we designed CNC ports for two of those shops we designed a "Pontiac" CNC head for Butler (long before they had interest in commercally building LS engines), we were also machining the CNC ported heads for them.... So we have been with the LS program long before many folks boarded the ship.

I'm not sure why it is "stirring the pot"? Just because I asked on here in regards to large CID LS combos? I for one don't know everything, so I asked. This is the only Website I spend time on and it has an "LS section".

[Scott Roberts]

Originally Posted by PAUL K

We've been building LS engines from the beginning.. Back in the day we were porting LS heads for three of the largest LS shops in the world. As a matter of fact, during that same time we designed CNC ports for two of those shops we designed a "Pontiac" CNC head for Butler (long before they had interest in commercally building LS engines), we were also machining the CNC ported heads for them.... So we have been with the LS program long before many folks boarded the ship.

I'm not sure why it is "stirring the pot"? Just because I asked on here in regards to large CID LS combos? I for one don't know everything, so I asked. This is the only Website I spend time on and it has an "LS section".

You're being coy

[FrankieT/A]

Originally Posted by Scott Roberts

Have u owned an ls?

Three

[FrankieT/A]

Originally Posted by PAUL K

I'm not sure why it is "stirring the pot"? Just because I asked on here in regards to large CID LS combos? I for one don't know everything, so I asked. This is the only Website I spend time on and it has an "LS section".

It just kinda seemed that way with all the back and forth. Hey you're my Johnson lifter guy.

[PAUL K]

Well posts two three and four were worthwhile.

Thanks to those who tried to help and have a worthwhile discussion.


EHTTFMF's!!!

[Scott Roberts]

Originally Posted by PAUL K

Well posts two three and four were worthwhile.

Thanks to those who tried to help and have a worthwhile discussion.


EHTTFMF's!!!

I'm not that guy...

[Scott Roberts]

Originally Posted by FrankieT/A

It just kinda seemed that way with all the back and forth. Hey you're my Johnson lifter guy.

To the point, you can call several engine builders, including Paul (my suggestion) and Crack 600hp with an smooth idle and maintenance free valve train...

[FrankieT/A]

Good discussion as far as I'm concerned...

[Scott Roberts]

Originally Posted by FrankieT/A

Good discussion as far as I'm concerned...

So what did u gain from it? No need for a big ci engine?

[FrankieT/A]

Originally Posted by Scott Roberts

So what did u gain from it? No need for a big ci engine?

Hasn't changed my mind at all actually...

[Scott Roberts]

Originally Posted by FrankieT/A

Hasn't changed my mind at all actually...

So what are ur goals? 600hp I get... what else?

[FrankieT/A]

Originally Posted by Scott Roberts

So what are ur goals? 600hp I get... what else?

Low end power...makes for nice drivability. One of my LS's, granted its a 6.0 L96 with a Cammotion cam, could use a little more low end power but will rip your head off above 4000RPM and pulls like freight train all the way to 7000. Its actually explosive in that range. Like flicking a switch. Its not a pig below 4K but it sure isn't linear either. No complaints about power overall. I think I'm good for about 450-500 ponies at the crank.

[PAUL K]

The LS1 engines have a huge hole in the torque curve that needs to be addressed. That is why they respond well to a gear ratio change and the automatics like a higher stall converter.

[FrankieT/A]

Originally Posted by PAUL K

The LS1 engines have a huge hole in the torque curve that needs to be addressed. That is why they respond well to a gear ratio change and the automatics like a higher stall converter.

All the same problems the DZ302 had.

[Scott Roberts]

Originally Posted by FrankieT/A

All the same problems the DZ302 had.

I get the Hi rpm range but it's, not the 302... again, what is ur goal? Burn the tires leaving a car show...? If u had a 600+ hp that planted ur ass at 4500rpm, wound that be a problem?
Mine was nasty at 5k... it would loose traction at 65-70 mph... that problem in ur world.?
Honestly, I don't understand you or ur goal...

[Stan Weiss]

No I have never built an LS.

4.165" Bore, 4.6" Stroke = 501.4 ci

But 9.75" deck height means using something like a 6.35" rod with a 1.1" Compression height piston.

While I can see it making good HP I do have to question if there will be premature ware.

Stan

[Stan Weiss]

Originally Posted by PAUL K

Any LS fans have experience on the permance of big displacement LS engines?

Pros/Cons?

Paul,
I do have to ask. Who's heads do you use on your LS builds?

Stan