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#1
01-19-2018, 12:46 AM
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Header size with Pro-Charger
What size header would I need when using a Pro-charger around 1200-1300hp on a street car? All I have access to 2" headers & need to know if I should look for other headers? Or if I can get by with these 2"
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#2
01-19-2018, 07:14 AM
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Not to be mean in any way with saying this but if you yourself have the knowledge to put together a motor that will be capable of 1300 hp and live then you should not have to ask a question like this, on the other hand if a shop is doing the motor for you top to bottom then they should be telling you what size tubes to get!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
01-19-2018, 09:25 AM
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I'm assuming round port heads? If so what is the largest diam. tube you can get bolted up? I would try a stepped header. 2" to 2-1/4". 2" will work but may hold you back a little.
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#4
01-19-2018, 09:29 AM
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2" plumbing is not going to make it. Stepped Headers will fix the issue.
2-1/8" right off of the heads, then 2-1/4" for 12", then 2-3/8" for the rest of the length to the collectors. Plumb the pipes so that the Passenger side pipes discharge into the collector in a clockwise direction as each cylinder fires. Plumb the pipes so that the Driver's side pipes discharge into the collector in a COUNTER-clockwise direction as each cylinder fires. Install Merge Cones in the space between the tubes where they meet in the center. 4" long That system was good enough for a 1350 HP 347 CID Engine at 9000 rpm engine in the late 90s and was worth 3 tenths on the Centrifugal Supercharged Engine/vehicle. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#5
01-19-2018, 10:46 AM
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Well from "experience" at around the 900-1,100 HP level I gained a little bit over 2 tenths going from 2" headers to 2 1/4" headers (with NO other changes)........so 2 1/4" will work fine, my BOOST numbers stay consistent ALL through the 1/4 mile pass. I still have my 2 1/4" in my engine at around 1,200 HP. The BIGGER the BETTER
GTO George |
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#6
01-19-2018, 11:18 AM
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At that power level, I suggest getting custom headers and making them as large as practical. You may need a cam designed to open the exhaust valve a bit earlier, if you end up running "smaller" tubes.
__________________
'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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