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StrikinLightnin

01-24-2004 01:43 PM

Hardin Marine - Cyclone Shorty Header

This is supposed to be a direct replacement for Gil exhaust manifolds.
Bolts up to Gil risers.
Anybody using or have any experience with this manifold?

BOSSMAN

01-24-2004 05:44 PM

I have them, fit great. On blower motors 700+ hp.
Rich

sun28

01-26-2004 08:15 AM

This is a subject that I am very interested in too. Hope that you get some more responses.

StrikinLightnin

01-26-2004 12:30 PM

Quote:

Originally posted by sutphen30
yup have first hand knowledge of them.installed them on a blowered 42' fountain that was running 91mph with gills.put those manifolds on and went SLOWER 4mph,needless to say they came off monday morning.just look at that back pipe,the exhaust gas has to make a 180 deg turn to exit,design could be alot better.thats my exprerience

What exhaust did you end up with on the 42?

KAAMA

01-27-2004 08:59 AM

Quote:

Wow! 4mph is a lot of speed to lose. That equates to about an 80-100hp loss!---that isn't any good for sure! :eek:

BOSSMAN

01-27-2004 01:30 PM

I have them and see no difference in speed. I talked to a friend at sterling and was told with a blower motor it will not change any on a 502 or mine a 510 bbc. If I had a 540 he said then they would not work.

Rich

StrikinLightnin

10-26-2004 04:37 PM

Re: Hardin Marine - Cyclone Shorty Header

Quote:

Originally Posted by sutphen30

we went back to the gill manifolds,we found them for $900 bucks,

Where can I find GIL manifolds for $900 bucks?New?

TxHawk

10-26-2004 05:33 PM

Re: Hardin Marine - Cyclone Shorty Header

I have installed them on a HP465 502 after a rebuild. I didnt see anywhere on the dyno where they could possibly be causing a loss of power. As for the Gils, i have seen them on FI 800+ hp applications.

Shore Thing

01-09-2007 08:32 AM

Re: Hardin Marine - Cyclone Shorty Header

Is there any new information on these? I had some corrosion on my gils and ended up with reversion. I'm considering the cyclone shorty's instead, but my new engine is a 650hp 540 and from the above posts, it sounds like a bad idea. Anyone have any experience or input they'd like to share?

AIR TIME

01-10-2007 06:20 PM

Re: Hardin Marine - Cyclone Shorty Header

stainless marine dry set up the new one 3rd gen, I have s/m dry on my 670hp motor going on my 13th year with them in salt water. you can get them 4'' or 5'' .

mrhorsepower1

01-11-2007 03:32 PM

Re: Hardin Marine - Cyclone Shorty Header

I have sold many sets of these. Yes they are a direct bolt on header to replace the Gil's and work great! Most of the applications are lower Horsepower 500-625 HP N/A

Hardin Marine

01-11-2007 05:38 PM

Re: Hardin Marine - Cyclone Shorty Header

The Cyclone Shorty is a great product, but if you have higher horsepower needs take a look at both the Typhoon Series and Hurricane Series of stainless headers. We build systems for a variety of different applications, just give one of our techs a call to help determine what is best for your particular situation.

Toll Free 877-900-7278

WAGS382

01-12-2007 04:05 PM

Re: Hardin Marine - Cyclone Shorty Header

Any Idea how much the Typhoon headers would help a 620 HP 502?

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