http://jobyteknik.homeip.net/corvette/2 ... tallation/
The stock Cross-Fire manifold uses the same basic design but the ports are much smaller and it has EGR.
This is a Cross-Fire manifold on top of an Offenhauser Cross-Ram manifold:
http://web.archive.org/web/200603220017 ... tallation/
(the offy takes more effort than the SY1 to fit, but BOTH require experienced fabricators, to fit under a low stock c4 corvette hood)
http://www.wallskid.com/c/small-block-chevy-cross-ram_|rKmBts5HrkD7LgWJ4o2CXBYhxN0k*|5qQiC0m3AGdg/
http://www.technovelocity.com/chevyhack ... olish.html
(a great deal of work, in the link above is best avoided by using a better intake at the start)
a couple factors to keep firmly in mind, the SY1 , or offenhauser cross ram intake intake is designed to operate in the 4500rpm and up range, and be matched to heads that flow 270 plus cfm, so if your cars not geared with at least a 3.45:1 rear gear and a manual transmission or about a 3000-3200rpm stall converter if your running an automatic youve basically screwed the combos potential efficiency, and , naturally the engines compression ratio and cam must match the intended power band and flow rates to maximize the cars power potential that will require a cam in the 235-245 duration range, with near a .600 lift on a 350-383 displacement engine, to allow the intake to flow correctly, keep in mind what goes in needs to exit efficiently, if its camed correctly you still need a low restriction exhaust and tuned headers.
its rather senseless to blame an intake for not producing up to its potential, if it can,t operate under the conditions its designed to run in, the engine long block combos below are very close to what makes the SY1/offy shine
http://www.airflowresearch.com/articles ... 1/A-P1.htm
http://www.airflowresearch.com/articles ... 8/A-P3.htm
now IM not saying its not going to prove quite beneficial , compared to the horribly restrictive stock intake,with a smaller cam and milder combo, but it sure won,t reach its full potential either.
a properly selected bunch of components and correctly built engine with the SY1 or OFFY should be able to easily exceed 500 plus hp, if your using a 10:1 cpr 383-406 as the basic engine and if its got decent heads, cam, gearing etc.
and NO its not going to be a great street combo, but if you drive like the devils coming to grab your soul,and your ex wife,s going to sign off on the contract if they catch you, youll learn to appreciate the power potential
if you want to build something responsive for street/strip use, these smaller 4 barrel carbs below ,make tuning easier on a car used mostly on the street
http://www.holley.com/0-8007.asp
OFFY BELOW [/b]
The stock Cross-Fire manifold uses the same basic design but the ports are much smaller and it has EGR.
This is a Cross-Fire manifold on top of an Offenhauser Cross-Ram manifold:
http://web.archive.org/web/200603220017 ... tallation/
(the offy takes more effort than the SY1 to fit, but BOTH require experienced fabricators, to fit under a low stock c4 corvette hood)
http://www.wallskid.com/c/small-block-chevy-cross-ram_|rKmBts5HrkD7LgWJ4o2CXBYhxN0k*|5qQiC0m3AGdg/
http://www.technovelocity.com/chevyhack ... olish.html
(a great deal of work, in the link above is best avoided by using a better intake at the start)
a couple factors to keep firmly in mind, the SY1 , or offenhauser cross ram intake intake is designed to operate in the 4500rpm and up range, and be matched to heads that flow 270 plus cfm, so if your cars not geared with at least a 3.45:1 rear gear and a manual transmission or about a 3000-3200rpm stall converter if your running an automatic youve basically screwed the combos potential efficiency, and , naturally the engines compression ratio and cam must match the intended power band and flow rates to maximize the cars power potential that will require a cam in the 235-245 duration range, with near a .600 lift on a 350-383 displacement engine, to allow the intake to flow correctly, keep in mind what goes in needs to exit efficiently, if its camed correctly you still need a low restriction exhaust and tuned headers.
its rather senseless to blame an intake for not producing up to its potential, if it can,t operate under the conditions its designed to run in, the engine long block combos below are very close to what makes the SY1/offy shine
http://www.airflowresearch.com/articles ... 1/A-P1.htm
http://www.airflowresearch.com/articles ... 8/A-P3.htm
now IM not saying its not going to prove quite beneficial , compared to the horribly restrictive stock intake,with a smaller cam and milder combo, but it sure won,t reach its full potential either.
a properly selected bunch of components and correctly built engine with the SY1 or OFFY should be able to easily exceed 500 plus hp, if your using a 10:1 cpr 383-406 as the basic engine and if its got decent heads, cam, gearing etc.
and NO its not going to be a great street combo, but if you drive like the devils coming to grab your soul,and your ex wife,s going to sign off on the contract if they catch you, youll learn to appreciate the power potential
if you want to build something responsive for street/strip use, these smaller 4 barrel carbs below ,make tuning easier on a car used mostly on the street
http://www.holley.com/0-8007.asp
OFFY BELOW [/b]
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