Performance Inductions heads
05-13-2010, 08:59 PM
#43
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here are the flow numbers from the 285cc ls7 heads on my sf1020 flow bench no pipe on the exhaust 4.125 bore.These numbers will be much different from a sf600 bench that most people use
0.100 77 65
0.200 160 117
0.300 240 168
0.400 304 210
0.500 345 230
0.600 380 244
0.700 393 253
here are the 275cc catherdral port numbers-the exhaust numbers were for the smaller turbo exhasut port-the std port is the same as the ls7 stuff
.100 76 62
.200 158 114
.300 232 160
.400 295 195
.500 340 225
.600 370 238
.700 378 246
0.100 77 65
0.200 160 117
0.300 240 168
0.400 304 210
0.500 345 230
0.600 380 244
0.700 393 253
here are the 275cc catherdral port numbers-the exhaust numbers were for the smaller turbo exhasut port-the std port is the same as the ls7 stuff
.100 76 62
.200 158 114
.300 232 160
.400 295 195
.500 340 225
.600 370 238
.700 378 246
05-14-2010, 11:46 AM
#46
Takes a serious intake to feed ~400cfm heads, plastic intakes for LSx engines are kind of pathetic.
ITB intakes are the only way to feed them to get close to their MAX POTENTIAL...........
and here we go..........hahahahaha
.
05-14-2010, 12:04 PM
#47
Hell no, not even close to their max potential........ LS7's and ported FAST intakes can't even feed L92 or LS7 heads to their max potential.
Takes a serious intake to feed ~400cfm heads, plastic intakes for LSx engines are kind of pathetic.
ITB intakes are the only way to feed them to get close to their MAX POTENTIAL...........
and here we go..........hahahahaha
.
Takes a serious intake to feed ~400cfm heads, plastic intakes for LSx engines are kind of pathetic.
ITB intakes are the only way to feed them to get close to their MAX POTENTIAL...........
and here we go..........hahahahaha
.
I agree the plastic intakes are going to be a restriction.
05-14-2010, 12:24 PM
#48
ITB's are very expensive....thats why you don't see alot more of them. A $300-$800 plastic intake that works pretty good is a big difference in price for 99% of people than the cheapest $3,000 Jenvey ITB intake.
And thats all I was saying.....ain't no way any plastic intake will get anywhere near being able to feed those heads TO THEIR MAX POTENTIAL.
.
I agree the plastic intakes are going to be a restriction.
.
05-14-2010, 12:41 PM
#49
ITB's are very expensive....thats why you don't see alot more of them. A $300-$800 plastic intake that works pretty good is a big difference in price for 99% of people than the cheapest $3,000 Jenvey ITB intake.
And thats all I was saying.....ain't no way any plastic intake will get anywhere near being able to feed those heads TO THEIR MAX POTENTIAL.
.
And thats all I was saying.....ain't no way any plastic intake will get anywhere near being able to feed those heads TO THEIR MAX POTENTIAL.
.
Most people know that, but to say that the ITB intake is the only option is crazy.
05-14-2010, 12:49 PM
#50
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actually most itb's are a restriction on these heads.itb's are made more for a broad power range and have a small cross section runner.We have made 740hp with itb's on a set of Cary's 275cc catherdral port heads but the intake was killing it up top.a sheetmetal is going the only way to really flow the air the next would probably be Cary's cast intake.
05-14-2010, 12:50 PM
#51
You talking about the tall intakes with two big carbs on top????? Yeah, those are badass for sure. I'm trying to keep things under the hood......lol I'm also more of a street car kind of guy....not an all out drag car.
But I see what you mean. Definitely other options.
.
05-14-2010, 12:50 PM
#52
actually most itb's are a restriction on these heads.itb's are made more for a broad power range and have a small cross section runner.We have made 740hp with itb's on a set of Cary's 275cc catherdral port heads but the intake was killing it up top.a sheetmetal is going the only way to really flow the air the next would probably be Cary's cast intake.
05-14-2010, 12:57 PM
#53
actually most itb's are a restriction on these heads.itb's are made more for a broad power range and have a small cross section runner.We have made 740hp with itb's on a set of Cary's 275cc catherdral port heads but the intake was killing it up top.a sheetmetal is going the only way to really flow the air the next would probably be Cary's cast intake.
Have you seen this? Whats your opinions on the RWHP claims of 752 RWHP. Its not engine HP, its RWHP on a chassis dyno.......
http://www.streetfire.net/video/GTM-...ETC_184408.htm
.
05-14-2010, 01:49 PM
#54
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Sheet metals are for high revving, correct? Not really street car stuff, and very hard to tune for the street from what I've been learning.
Have you seen this? Whats your opinions on the RWHP claims of 752 RWHP. Its not engine HP, its RWHP on a chassis dyno.......
http://www.streetfire.net/video/GTM-...ETC_184408.htm
.
Have you seen this? Whats your opinions on the RWHP claims of 752 RWHP. Its not engine HP, its RWHP on a chassis dyno.......
http://www.streetfire.net/video/GTM-...ETC_184408.htm
.
yeah,that's about 800hp in that car.That's not hard to believe,we made 740 with a .620 lift cam and 11.2-1 compression on pump gas.the intake is a restriction-no matter how you cut it.The PI ls7 heads will easily make 900hp on the right engine with the right intake manifold.
05-14-2010, 03:30 PM
#55
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sheetmetal intakes can be made for a variety of cars-street cars with stock hoods,high rpm drag cars,road race etc.That's the beauty of sheetmetal-you can have what you want made.
yeah,that's about 800hp in that car.That's not hard to believe,we made 740 with a .620 lift cam and 11.2-1 compression on pump gas.the intake is a restriction-no matter how you cut it.The PI ls7 heads will easily make 900hp on the right engine with the right intake manifold.
yeah,that's about 800hp in that car.That's not hard to believe,we made 740 with a .620 lift cam and 11.2-1 compression on pump gas.the intake is a restriction-no matter how you cut it.The PI ls7 heads will easily make 900hp on the right engine with the right intake manifold.
05-14-2010, 05:24 PM
#56
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sheetmetal intakes can be made for a variety of cars-street cars with stock hoods,high rpm drag cars,road race etc.That's the beauty of sheetmetal-you can have what you want made.
yeah,that's about 800hp in that car.That's not hard to believe,we made 740 with a .620 lift cam and 11.2-1 compression on pump gas.the intake is a restriction-no matter how you cut it.The PI ls7 heads will easily make 900hp on the right engine with the right intake manifold.
yeah,that's about 800hp in that car.That's not hard to believe,we made 740 with a .620 lift cam and 11.2-1 compression on pump gas.the intake is a restriction-no matter how you cut it.The PI ls7 heads will easily make 900hp on the right engine with the right intake manifold.
Which head u recommend for LS7/LSX440 engine ( Bore 4.185 x stroke 4.000 ) ?? how much ?
05-14-2010, 05:37 PM
#57
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What are your plans for the engine?
05-14-2010, 05:39 PM
#58
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depends on how the manifold is built-it you build it for mid range tq-you will lose some up top-if it's built for up top,it will lose some down low.until we build manifold with runners that will shorten with rpm we are stuck with physics.
