Why are people telling me that I need to change the Long Tubes when I install my Supercharger? Everyone says "gotta use shorties or truck manifolds"......what gives?

 

Nothing. IMO LT's will work great with a blower.

 

? What?

you say people are telling you that you have to change to longtubes, but then your next statement says that they are telling you that you have to use shorties or truck manifolds.

regardless, you can runa supercharger on stock manifolds, but'll limit the power than you'll make. The longtubes will let the car breathe and make considerably more power.

 

with a supercharger on your car you are going to want maximum for out of the exhaust unlike a n/a motor scavenging doesnt really matter as much......this is because the blower Pushes air through....so maximum flow=maximum power. ie. 1 7/8" headers

 

Thanx guys.....I thought something was fishy.

 

Shorties or truck manifolds work with TURBO setups, somebody misunderstanded you.

 

he said change THE longtubes, not change TO longtubes lol.

 

i left the reading part of my brain when i got up this mourning..lol.

 

thats something someone on a honda fourm would say.. a supercharger pushes air into the engine, power is achieved by making the engine take in the air and push it out fast as possible, so if you were pushing air in faster you would want to push it out faster also or the resistance would be limiting the amount of air that could be pushed in..therefore making lt's the best!

 

someone probly was confused when they told you that.

if you had a rearmounted turbo setup, you want manifolds....


but for a supercharged motor, you want longtubes.

 

Sad truth look at the real tech forums on Hondatech, people are dumber here.

half a million pages on ram air but just because its ls1tech no ricers here right?

Not to say both sites dont have both good and bad.

 

Thank you sir....lol..I was wondering what he ment myself.

 

Your original question has been answered but here is some additional information regarding the relationship of the exhaust to a supercharger.

First, a typical blower setup is capable of pumping 40 to 50% more air (and fuel) into the cylinder than the engine could do without the blower. That's why you can produce 40 to 50% more power. However, while the blower can pump more air and fuel into the cylinders, you still have the same setup on the exhaust side that the unblown engine had. (Unless you change it.) So you are trying to get 40 to 50% more exhaust gas out of the cylinder. Admittedly you do have the piston moving up and forcing these burned gases out the exhaust, which helps. But if there are restrictions such as small exhaust port, small exhaust valve, short cam timing and lift, and small diameter headers, it makes the job of getting those gases out that much more difficult.

Because of this, the ideal blower engine will favor the exhaust on cam timing. Blower cams generally have higher lift and longer duration on the exhaust side. Additonally, you want the largest exhaust ports you can have along with, typically, about 1-7/8" diameter head pipes. I am speaking now of experience gleaned with SB Chevys which typically have 1-1/2" diameter head pipes. I am not familiar with header pipe size on the usual LS1 header but with a blower, it would be nice to have a larger port and head pipe than standard.

Now, to put this in perspective. Is a cam change and header change absolutely necessary if you install a blower? No, it isn't. Even without these changes you will get significantly more power with the blower and you won't damage your engine with a stock cam and headers. You just won't make as much power as you would otherwise. And additionally, almost all of the extra gain you would see from a cam and header change will be at engine speeds above about 4,500 to 5,000 rpm.

I hope this clarifies some of these issues. Much of the experience I have gained was during the time I was with B&M and we developed the blower program. There were literally hundreds of dyno tests taken with every conceivable combination of parts. As a result of these tests and the data achieved, I wrote a book on supercharging published by B&M which unfortunately is no longer available. After I left B&M I also wrote a tech manual on supercharging for Weiand. However, a lot of the key information that was in the B&M book and the Weiand tech manual is now printed on nine pages in the Holley/Weiand catalog under the heading "Weiand Supercharger Technical Information." However the information I had in the book on exhaust issues did not make it into the Holley/Weiand catalog.

 

i dont think people are dumber here i think they just dont know what a search button is...

 

Spellcheck FTW!

 

I know this is an extreme example.....but....... I am having a extremely difficult time remembering ever seeing any type of drag car with a blower running stock manifolds.....

 

FTW FTL.

Rememberize this for next time.

 

i'M GETTIN' TIRED OF THE SEARCH BUTTON REMARKS. I TRIED THE SEARCH BUTTON...AND MY QUESTION WASN'T ANSWERED. IF A MAN CAN'T SEEK ADVICE FROM HIS PEERS WHO HAVE A COMMON INTREST IN THE SAME TYPE OF VEHICLES....THEH THIS WEBISITE IS FOR NOTHING. THANX

 

Don't let some douche get you revved up. Your question was a legit one, I can see where there would be some confusion.

If you'd asked what all you need for an LS6 intake install, then you could get search ****'d.

 

alright dont get your panties in a knot as long as you tried that first