Standard-Split-Reverse Split

[Hunter98TA]

I would like to hear your pros and cons on the 3 types of cams.

I for one, like the idea of a reverse split, like 230-224. The reason is the LS1/6 is limited on the intake side. Poor flowing intake for the type of ported heads that are on the market. So the idea of keeping the intake open for a longer period of time, would compensate for that deficiency.

On a Forced Induction engine, the opposite is true. Since the power adder is forcing more air in, the exhaust needs some help scavenging all the extra gases.

Am I on the right track with these thoughts?
Matt

[L G Motorsports]

The problem with the "reverse split" cams is that they may tend to work when the intake manifold becomes a restriction, but that doesn't happen until about 6500 rpms. Before that, the intake flows more than enough to produce plenty of hp. The Reverse split cams then limit your low rpm hp/tq and only catch up with a normal split cam at the high rpms. most graphs that i have seen with a reverse split cam, have NO increase in HP or TQ over Stock numbers, until about 5000 rpms. Whereas a normal split cam like our G5 or G5X-2, is above 350 torque by 3000 rpms.

Thanks
Lou Gigliotti LG Motorsports 972-2272-7753
Home of the LG True Long Tube headers.

[Hunter98TA]

Interesting. Thanks Lou.
Since the TA is mostly a street car, this bit of new info will keep me thinking.
Low end Torque rules the street scene!

[BLU-BY-U]

Lou, thats an interesting point.

I dynoed at your shop about 6 weeks ago (approximate) during one of your dyno days. I have a reverse split cam (230/227) on a stock headed vehicle. I believe I made like 400/390 (running quite rich).

I'd love to see mine overlayed with a "normal" split cam only LS6 so you could demonstrate visually.

[RandyN]

Scary to see a Tuner/builder comment like that. Specific is the quote. "Flow restriction is not till 6500 RPM".

That is rediculous. The reason a GM tupperware intake sucks above 6500 is because the long runers were not designed to run at that rpm. That would mean that a conventianal dual- plane intake would not benefit from porting. Get real. Thank God Wilson Manifolds knows the deal.

Regardless of RPM an intake will benefit from additional flow, as long as velocity is kept proportional.

The stock intake is garbage. Evan on a stock car increasing only intake flow(not talking air filter) shows significant results. LG knows thats why he dyno's so many different versions of the S2 TB. Very soon TPIS has a new oval shaped TB with a new "Front" portion of the intake. They have seen 18-25RWHP alone from just increased airflow in the intake manifold.

I'm not trying to trash anybody. Just helping with what is facts.

I know that the G5X-2(spelling?) H/C cars put down 473+/-HP.

Now how come with these #'s these cars are not trapping 132-134 MPH. Listen The T/A from Thunder Racing traps almost 129 with an ET of 10.59. Throw out ET. But, they dynoed 460HP and wiegh 400 lbs more. How can a car with 15 more HP and 400 lbs. lighter have less MPH.

I will tell you. All dyno's are different. Remember that. MPH in the 1/4 is no way to fudge. There is no way that that package from LG is making 15 or evan the same power as the Thunder packages.

I don't care what anybody says. 473RWHP and only 126-7 MPH traps don't add up.

Sorry
Randy

[BAD 06]

Don't beat around the bush Randy, just tell us what you are really thinking.

Chad

[Jspeeddemon]

Randy N you may have a point, all the details are not mentioned,so it is questionable at best. One thing you left out is the diffeence in MPH, of two different cars, run at different tracks, under different weather and air conditions, are no more comparable than two cars dynoed on the different dynos. If you are comparing apples to apples then you have to compare oranges to oranges as well. If you can take two cars, with the setups, or cams, that you want to compare, and run them on the same night at the same track, your point would be proven. My car might run 115 at a track in Florida and 110 at a track in Denver due to track and altitude differences, and that is the exact same car. Anytime you are comparing this to that, you just about have to compare what your car did stock to what it did after the changes. Not trying to diss anyone just filtering out the facts. Good luck either way, but most people have been happy over the results from a changing to a GX5-2 over the stock cam from reading the forum.

[RandyN]

I'm sure that people love thier G5x-2 whatever the number is. I'm making two points.

1. That the intake is still garbage regardless of RPM.

2. That LG dyno figures seem high considering that our cars are 400 lbs lighter than camaros with LS1's that dyno lower but seem to trap higher.

Location! Well LG has sold these GX whatever things all over the country. I'm sure that as smart as a business man as he seems he would post MPH from tracks where the best trap speed was obtained. You make it seem as though all of LG cams were ran at Mile high. Sorry all of these packages have been tested all around. Now, it is fair to say that most all aftermarket companies get thier best results from customers who run thier cars in cool weather with low DA's and at sea level. Hell, maybe evan down hill.


Lts both do some research. I'll check to see where Thunder runs thier cars and you check to see LG's best MPH and where it was run.

I'll be back.

Randy

[RandyN]

The times and dyno figures can be seen at Thunderracing.com. As far as location. 30-45 minutes outside New Orleans at the "No problem Raceway" actually looks like a very nice track. Elevation is at 12 feet above sea level. I will try to find out DA for that run. You can view the slip. It did not have weather data.

PS while at the Thunder site-check out the new Electric water pumps. Street version from Meziere. They just dynoed 8 additional RWHP on three individual dynos.

1- before
2- on with pump
3- again w/o pump.

paul said he was going to try the pump on his c5 today/tomm.

Cooooool guys up there. call them today to get on the pump list. They are the first to have and are demoing and dynoing these with Mezier.

Randy

[Jspeeddemon]

Randy thanks for the great info from Thunder racing. I was defending the idea that we compare apples to apples, don't have any other vested interest with LG. People have stated many times they are satisfied with their products. About the Mile high just using that to make a point and I am glad we agree. If Thunder racing makes and designs the best products, I guarandamn tee ya, that a thunder racing cam, will be in my car when it is time to do a change. Idea exchange and sorting out problems is what makes this forum so great, I've enjoyed swapping ideas with ya.

John

[RandyN]

Hey bud your all right man. Not because we both agree or disagree, but that we can both chat on the net to help our cause. To make ZO6's haul ass.

Alot of people here get in a tizzy when people disagree. Obviously not us. Hey check out LS1tech.com. Funny that LG just commented on his "preliminary 346 solid dyno" and says exactly what I said.

I know about this intake shit because I'm building a high compression 346" solid roller motor. After owning and selling a holly intake I'm now in possesion of a sheet metal intake. It required 40hrs of porting to make it right. LG got it right on the other site. My solid motor shoud peak at 7600 too. With shifting at 8000. The stock intake flattens out around 6200-6600. The sheet metal should peak at 7500-8000.

I'm real, real close to completion. As a matter of fact the motor is complete. We assembled the bottom end, degreed the cam, checked piston to head, and piston to valve. Motor is back in cradle ready to go in. My compression is 12.80, but the big cam should effectively lower my comp.

I can't wait. I'm getting exited as we speak.

Peace Bud
Randy

Ps Thats why I have been dealing lately with Thunder. They have been building solid roller motors. They are not doing mine, but have been extremely helpful. Most shops don't give info if they are not building your shit. I do buy components there. Jason is a world of info. Good luck

[Jspeeddemon]

Randy keep us up to date on your progress, I would love to see that motor in action. I like to discuss and exchange of ideas without taking it personal, as you do. I absorb all the info here like a sponge, and when I go with mods, it will be both feet, all in. Keep up the good work, thanks for the pat on the back, I think you are cool as hell in my book, like me, a die hard hot rodder.