90mm LSX+Supercharger
Thread Starter
Staging Lane
Joined: Nov 2002
Posts: 61
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From: Houston
90mm LSX+Supercharger Would the use of a supercharger be able to utilize the full capacity of the 90mm LSX intake. I imagine that even though it does pass through a smaller opening at the airbox and maf the forced induction shoudl be able to compensate. I just figured once a 90mm throttle body can be made or had. Forced induction would be the only way to gain max hp from the intake. Seeing that I don't know of any 90mm MAFs or Air Lids. But they will probably begin surfaceing, why anyone didn't think making them in anticipation I don't know. I think something like that would sell.
The bigger intake will only reduce the amount of boost. This will allow someone to make more power at the same boost level, but it's not worth it when all the person needs to do is pulley up the boost to make more power. This is why there are a lot of guys who never upgraded to the LS6 intake.
Originally Posted by Trojan T/A
The bigger intake will only reduce the amount of boost. This will allow someone to make more power at the same boost level, but it's not worth it when all the person needs to do is pulley up the boost to make more power. This is why there are a lot of guys who never upgraded to the LS6 intake.
Say you have 8lbs of boost with a LS6 intake and make 420hp.Switch that to a bigger intake like the LSX and the boost pressure should drop to 5-6lbs but hp should go up to like 440 or so..It's like more HP with less stress.
question is?
will the LSx clear the vortech discharge tube?
I understand that it is taller than the ls6.
I have not installed my vortech yet, so i don't know how close it is to hitting top of intake.
Thanks
Ryan
Ryan.
will the LSx clear the vortech discharge tube?
I understand that it is taller than the ls6.
I have not installed my vortech yet, so i don't know how close it is to hitting top of intake.
Thanks
Ryan
Ryan.
Originally Posted by Slowhawk
With the bigger intake you will actually make more HP with a lower boost pressure.
Say you have 8lbs of boost with a LS6 intake and make 420hp.Switch that to a bigger intake like the LSX and the boost pressure should drop to 5-6lbs but hp should go up to like 440 or so..It's like more HP with less stress.
Say you have 8lbs of boost with a LS6 intake and make 420hp.Switch that to a bigger intake like the LSX and the boost pressure should drop to 5-6lbs but hp should go up to like 440 or so..It's like more HP with less stress.
less stress???? How about the stress of $1363 out of your pocketbook. Im with ya on the less boost more power bit. I think they need to test it on FI setup so we can all see what it does so then some of us will believe in it a little more. Thats just my .02 though
But less boost to make more hp would cost $1300. More boost and more power equal $100 pulley. The pulley for $100 will always outperform the $1300 intake. Also, the less stress is nice, but if you already have a built motor, isnt that stress problem what you already took care of? 420 @8lbs with LS6, 440 at 6lbs with $1300 intake, or 500 at 10lbs with $100 pulley; which would you choose?
Last edited by Trojan T/A; Jan 16, 2004 at 03:32 PM.
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Originally Posted by Trojan T/A
But less boost to make more hp would cost $1300. More boost and more power equal $100 pulley. The pulley for $100 will always outperform the $1300 intake.
well yeah.....though the pulley and the intake will always outperform the pulley
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It's not boost that makes power. It's the volume of air moved.
Go to a smaller pulley and you will make more power to a point. Beyond a certain point you will not be able to overcome the density loss due to heat. Also, higher charge air temps promote pre-ignition and detonation. What if you are already at the point where you can no longer "pulley up" for reliable power?
Go to a smaller pulley and you will make more power to a point. Beyond a certain point you will not be able to overcome the density loss due to heat. Also, higher charge air temps promote pre-ignition and detonation. What if you are already at the point where you can no longer "pulley up" for reliable power?
TECH Fanatic
Joined: Mar 2003
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From: Jersey boy
you cant just up your boost without reprecussions though. sure a $100 pully could make the same amount of power but now you have heater the intake air alot more and need either a better tune, bigger intercooler, or race fuel. an freeer(lol, spell check?)flowing intake will flow the same amount of air as before, but will do it at a lower pressure which means less temperature rise. you should make ~the same amount of power as you did at the higher boost level from before. why is that good? because then you up the boost untill its back where it was and now you are making significantly more power than you were before at the same amount of boost and with the same amount of heat rise. therefore you can use the same tune, intercooler, and octane fuel that you were using before and still reap the benifits of the additional power.
less stress???? How about the stress of $1363 out of your pocketbook
J
TECH Regular
Joined: Feb 2002
Posts: 467
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From: CHICAGO
Ok well how about my case. LPE top end kit (heads, cam)high compression motor 11:1. Procharger 4 psi of boost 510wrhp.
Put LSx intake and 90mm throttle body.
Does that mean 2psi of boost 520rwhp?
Then can I get a smaller pulley to bring me up to up to 4 psi again.
So that means more rwhp right. 2 psi worth so lets a say 26rwhp per one pound of boost (well for me at least).
Not sure I make sense but you guys can figure it out .
Oh ya I will be doing my bottom end but if I can hold off for a while
that would be great.
Put LSx intake and 90mm throttle body.
Does that mean 2psi of boost 520rwhp?
Then can I get a smaller pulley to bring me up to up to 4 psi again.
So that means more rwhp right. 2 psi worth so lets a say 26rwhp per one pound of boost (well for me at least).
Not sure I make sense but you guys can figure it out
.Oh ya I will be doing my bottom end but if I can hold off for a while
that would be great.
Last edited by LINGENFELTER SS; Jan 17, 2004 at 07:53 PM.
Trojan if the motor flows better you can make more power. I can boost it more.
You can't just boost a motor to infinity.
If I took my current setup, and put a sheetmetal intake on it, and a bigger TB, I would be able to boost it more and make more total power.
I think the LSX 90mm plus the 90mm TB might help total output for a car like mine.
You can't just boost a motor to infinity.
If I took my current setup, and put a sheetmetal intake on it, and a bigger TB, I would be able to boost it more and make more total power.
I think the LSX 90mm plus the 90mm TB might help total output for a car like mine.
Banned
Joined: Dec 2002
Posts: 660
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From: Elgin, IL
Originally Posted by Pro Stock John
Trojan if the motor flows better you can make more power. I can boost it more.
You can't just boost a motor to infinity.
If I took my current setup, and put a sheetmetal intake on it, and a bigger TB, I would be able to boost it more and make more total power.
I think the LSX 90mm plus the 90mm TB might help total output for a car like mine.
You can't just boost a motor to infinity.
If I took my current setup, and put a sheetmetal intake on it, and a bigger TB, I would be able to boost it more and make more total power.
I think the LSX 90mm plus the 90mm TB might help total output for a car like mine.
In the example above, someone said the engine would have less stress due to less boost pressure with a freeer flowing intake. Is that really true with the 2 examples given. The SC is still moving more air into the engine and the engine is making more HP(due to a higher MEP). Doesn't more HP make more stress? Arn't the internal cylinder pressures (MEP) higher (to make more HP). Isn't this more likely to lift heads and break parts than the lower cylinder pressures of the lower HP version? So which engine is really under more or less stress?
Please chime in so I can understand this situation better. I have a D1SC on my 98 SS and am considering an LS6 intake among other possible mods!
Please chime in so I can understand this situation better. I have a D1SC on my 98 SS and am considering an LS6 intake among other possible mods!
PSJ, I know you cant boost to infinity, but my point was that for most FI setups on here (meaning guys not looking for more than 500 or 600rwhp) there is no point in spending an extra $1300 to get them an extra 20 hp when the rest of the setup needs an improvement. Most people here arent running a lot of boost anyway, even the guys with the built motors. I see few guys pushing these motor about 15psi. My reference point is Rob Raymer's Formula. They are making over 600rwhp and almost 700tq on a stock 98 LS1 witht the old LS1 intake at 11psi. Send him an intake and lets see what it does on that car without touching anything else. If you have the money and want to do it, yes this intake will get you the power. But also realize that the new LS2 intakes should be out soon and should put down nearly equal power. Lastly if you are going to spend $1300 on an intake, why not spend 1500-2000 for a custom sheetmetal one that will show even more power and be tuned to your specific application. I think this is a great N/A product, but when I go through the trouble to build up a motor for $8k, and then an FI setup for another $8k, I'd rather save that extra 1300 for something else. In simplest form, I do not see this as a great bang for the buck mod; if it's the last thing left to do, go for it.
Last edited by Trojan T/A; Jan 19, 2004 at 11:54 PM.
On The Tree
Joined: Oct 2003
Posts: 167
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From: Northen CA
So in that case if you ran the lsx manifold could you run higher boost then.. If you say 8lbs drops to 5-6 pounds would that mean you can raise it to 11-12 lbs with no problem if you ran the new Lsx mainifold and 90 mm throttle body?