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11-04-2024, 04:49 PM
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#1 |
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Craig
Drives: 2019 ZL1 1LE Join Date: Jan 2019
Location: Peterborough, ON Canada
Posts: 443
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Ported Heads?
So I’m pondering if porting the stock LT4 heads is worth it / needed for my 2019 ZL1/1LE that will be getting built this spring. Being Canadian it’s looking around $2500+ USD for Frankenstein or Katech (Port, Intake and Exhaust valves, guides, springs)
Build is: Jokerz Ported Blower 2” Catless Kooks Headers TSP Cam 229/245 .635/.635 117LSA +32 BTR .660” dual valve springs Johnson 2110r lifters Roto-Fab Big Gulp Katech 103mm TB 160 Thermostat ATI crank pulley Cordes Expansion Tank MM Catch can DOD / VVT delete kit (valley cover style) ARP head stud kit DSX 9.65” Lower Pulley DSX Aux fuel pump kit P3 Gauge Meth kit Plugs / wires yadda yadda
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11-04-2024, 05:12 PM
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Moderator
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: New Ipswich NH
Posts: 6,339
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Quote:
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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11-04-2024, 05:14 PM
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#3 | |
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Craig
Drives: 2019 ZL1 1LE Join Date: Jan 2019
Location: Peterborough, ON Canada
Posts: 443
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Quote:
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11-05-2024, 06:58 AM
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Petro-sexual
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Ported heads would add to efficiency, and maybe require less boost to get to where you want to go, but anecdotally - many builds have gotten to that power without ported heads, like Josh' said. They flow well already.
Maybe for peace of mind - with the purported valve guide issue these, apparently, have, sending them out for porting and to address the guides wouldn't be a bad idea.
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 '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs |
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11-05-2024, 07:06 AM
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#5 |
         Drives: 2SS 1LE Join Date: Aug 2013
Location: US
Posts: 3,794
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I would be interested what your valve seats look like too
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11-05-2024, 07:23 AM
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#6 |
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Sarcasm loading --------
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Your build says ported blower but doesnt state which one.
If you are planning on going big and the heads are off the car - go ahead and do it.
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"The salesman actually told me to stop getting it sideways during the test drive"
2018 MBM ZL1 1LE - 652 rwhp, 588 rwtq SAE 2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD 2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD |
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11-05-2024, 07:41 AM
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#7 |
  
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,643
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You gain around 20whp by porting stock castings. LT4 heads shouldn't need totally reworked like LT1 heads do. I would just have them ported and run the appropriate springs.
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 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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11-05-2024, 08:11 AM
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#8 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 4,193
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Mine has the LME heads [Hennessey #1] that came with HPE's 850 pkg. I didn't ask LME how much horsepower they add, and HPE wouldn't tell me, but LME told me that their CID heads add approximately 25 HP.
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2020 ZL1LE A10.
LME LT4 390 short block, LME CID Heads, Kong E2650, FBO. 15" conversion, MT ET Street R 325/15. 100 octane: 1045hp/1055tq. 100 octane + Meth (1x10+): 1117 hp/1067 tq |
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11-05-2024, 06:23 PM
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#9 | |
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Craig
Drives: 2019 ZL1 1LE Join Date: Jan 2019
Location: Peterborough, ON Canada
Posts: 443
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Quote:
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11-05-2024, 06:24 PM
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Craig
Drives: 2019 ZL1 1LE Join Date: Jan 2019
Location: Peterborough, ON Canada
Posts: 443
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Quote:
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