Everyone has been asking for a direct comparison between the LS6 intake and the Professional Products Typhoon intake. Also there were a couple of forum members who thought the Typhoon might make more power by grinding away the inner lip on the runners.

We have an LS1 dyno engine that we used in originally developing the Typhoon and the full specs on it are listed below. We took one of our
Typhoon manifolds out of the box, plus an additional Typhoon that we ground away the lip on, per some of the suggestions made here, plus an LS6 manifold we bought from a Chevy dealer, and delivered them to Mitech Racing Engines in Placentia, CA, who does all our dyno work.

We had our new 85mm throttle body that we used on all three configurations. The short story is that the unmodified Typhoon made 17.7 more horsepower than the LS6 at 6,700 rpm. The cam is only rated to 6,000 rpm and Mike LeFevers, at Mitech, didn't feel comfortable taking the engine any higher than 6,700 rpm. It was interesting that looking at the dyno chart, the LS6 appears to be starting to nose over at 6,700 but the Typhoon is still climbing. So with a bigger cam, or least one with better springs that would rev higher, I suspect the difference might even be greater than the 17.7 hp we got.

It's also worth noting that FAST is claiming that their manifold is 15 hp better than an LS6.

When we put the modified manifold on, we lost 2 to 3 hp. So that modification doesn't really do anything.

Here is the data on the mods on the dyno engine with links to the sites where you can get more info.

Super Flow Engine Dyno

Heads = AFR heads – # 205

http://www.airflowresearch.com/

Cam = Lunati # 55004
Advertised Duration IN/EX: 283/283
Duration @.050 IN/EX: 221/221
Gross Valve Lift IN/EX: .558"/.558"
Lobe Sep Angle / Intake Ctr Line: 114/110
Valve Lash IN/EX: Hyd/Hyd
RPM Range: 2500-6000
http://www.holley.com/index.asp?division=Lunati

Short Block = Stock LS1 Crate engine

http://www.gmgoodwrench.com/perfpartsjsp/home.jsp

ECU = Reworked by FastChip

http://www.fastchip.com/

Headers = Hooker Super Comp Long tube headers

http://www.holley.com/index.asp?division=Hooker

Intake = Professional Products # 52060

www.professional-products.com

Throttle Body = Professional Products 85mm LS1

www.professional-products.com

 

How did you attach the 85mm TB to an LS6 manifold?
Any sort of reducer, or just live with the step and its
airflow effects?

 

Our 85mm throttle body comes with an aluminum reducer plate that funnels it from 85mm down to the stock LS6 inlet.

 

Am I just not seeing a link to the dyno graph? Also, I clicked on http://www.profesional-products.com/ and got a page cannot be displayed.

 

Interesting, but i'm sure we'd all like to know how it did below 6700 rpm. While we may brush against 6700 from time to time, my engine certainly dosnt live up there. Id like to see a graph is possible. Nevertheless, thanks for finally posting some results!!!!

 

LOL. You misspelled the name of your web page.

http://www.professional-products.com/


EDIT: Not laughing at you or anything. I do that **** too.

 

We will be posting a dyno chart when I can get it into a format that is suitable for posting.

For the record, we started the run at 3,400 and at that rpm the LS6 was 1 or 2 hp better and the two curves gradually got closer and closer to one another and crossed at about 5,000 and then the Typhoon gradually pulled away.

As far as misspelling the name of our webpage, my chief engineer has to take the hit for that as I just copied and pasted all the engine info he sent me. Of course, I guess I should have proofed it first. But I probably wouldn't have notice it anyway.

If anybody has any more questions I won't be able to be back on here until tomorrow morning.

 

We are pleased to announce that Professional Products is now a proud sponsor of LS1TECH.com!

 

so how much do these cost? didnt see it on your page.

 

SWEET, we can talk about them now!

BTW that one Looong thread has 3 dyno charts from a sponsor that sells them. It did really well. I'd buy it when i have the money.

 

not a bad price for a polished intake.

 

Is there anymore info on the 96mm manifold/tb for the LS1, I think its part numbers 52064/52065.

 

So if the Typhoon intake with 85mm tb beats a LS6 with 85mm tb woudl it be safe to say that the LSx version of this intake (basically the same thing but with the ability to accept the 96mm tb) with a 96mm tb will make even more power? I would think the 96mm tb would give a few more hp, but at least it wouldn't perform any less then what we have seen with this intake vs the LS6. I think this is close to FAST territory, especially if you go with the 96mm tb version. Plus its much less the half the price of the FAST intake.

 

couldn't find a price..sorry

 

If you add it to your wish list, it says the price is 470.95

 

Any updates on the 96mm?

 

While nothing is cast in stone when it comes to modifying engines, usually the bigger throttle body is a benefit when the engine is punched out to a bigger displacement or you have a bigger cam. I am guessing that if we put the 96mm manifold and 96mm throttle body on the same engine we have now, we probably wouldn't see a meaningful increase.

Just putting on a bigger throttle body that lets in more air really isn't effective unless you have done something to the engine that makes it require more air. Typically, the stock LS1 engine has the correct size throttle body on it as designed by GM. But as soon as you install a bigger cam, the engine is going to need more air and that's when a larger throttle body becomes necessary.

Then again, it is possible that the GM engineers compromised on the throttle body size for other reasons and putting a larger unit on will provide more power.

 

Any idea if Fuel Rail Covers will fit these? Also, how long have these been out?

 

Interesting. I'd love to see the result of the LS1 intake with the 96mm TB.

 

+1

Currently I have the FAST 90 PTM 90mm TB on my shopping list. But I could be swayed, just need a little info/proof first.