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Old 06-17-2022, 11:51 AM   #1
Dan82679
 
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Cam install

I'm going to have my entire front including radiators off to do a stage 2 FI interchiller upgrade. While I'm there is there a cam or custom grind that I can install w/out the supporting mods and Without taking the heads off? I'm eventually going to do a built motor next year so I'm just looking to get a few extra HP while I got the front off.
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Old 06-17-2022, 11:58 AM   #2
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Quote:
Originally Posted by Dan82679 View Post
I'm going to have my entire front including radiators off to do a stage 2 FI interchiller upgrade. While I'm there is there a cam or custom grind that I can install w/out the supporting mods and Without taking the heads off? I'm eventually going to do a built motor next year so I'm just looking to get a few extra HP while I got the front off.
Lingenfelter has a cam for you, and, unless the Lt4 is different, heads do not need to be removed but you do need to get yourself 16 pen magnets to hold the lifters up while you swap the cam.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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Old 06-17-2022, 12:01 PM   #3
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[QUOTE=JSH;11188405]Lingenfelter has a cam for you, and, unless the Lt4 is different, heads do not need to be removed but you do need to get yourself 16 pen magnets to hold the lifters up while you swap the cam.[/QUOTE

Is there a rod retaining tool for the lt4?I have seen LS rod retaining tools.
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Old 06-17-2022, 12:11 PM   #4
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[QUOTE=Dan82679;11188406]
Quote:
Originally Posted by JSH View Post
Lingenfelter has a cam for you, and, unless the Lt4 is different, heads do not need to be removed but you do need to get yourself 16 pen magnets to hold the lifters up while you swap the cam.[/QUOTE

Is there a rod retaining tool for the lt4?I have seen LS rod retaining tools.
Not sure, but LPE can answer your questions.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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Old 06-17-2022, 12:13 PM   #5
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[QUOTE=JSH;11188413]
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Originally Posted by Dan82679 View Post

Not sure, but LPE can answer your questions.
I'll give them a call
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Old 06-17-2022, 05:01 PM   #6
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I would not do a cam without changing lifters, springs, pushrods, and vvt delete at them minimum
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Old 06-17-2022, 07:17 PM   #7
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I have called a few places and no one recommends changing the cam only so I just pulled the trigger on prc aftermarket heads with supporting mods and a Cam. I am currently at 730 Whp on 93 and 780Whp on full E-85(I have port Injection/Kong Xport/Interchiller) I don't want to go over 850-875 to keep things safe with the stock bottom end.If anything I can switch my upper pulley from a 2.3 back to a stock 2.5.
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Old 06-17-2022, 08:59 PM   #8
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Quote:
Originally Posted by Dan82679 View Post
I have called a few places and no one recommends changing the cam only so I just pulled the trigger on prc aftermarket heads with supporting mods and a Cam. I am currently at 730 Whp on 93 and 780Whp on full E-85(I have port Injection/Kong Xport/Interchiller) I don't want to go over 850-875 to keep things safe with the stock bottom end.If anything I can switch my upper pulley from a 2.3 back to a stock 2.5.
Nice build. What are you using to run the port injection?
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Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“
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Old 06-17-2022, 09:21 PM   #9
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Nice build. What are you using to run the port injection?

Toohighpsi port plate system with rails

SIEMENS 80lb/hr EV6 US CAR Fuel Injector
Holley terminator x kit
stock x ported supercharger

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Old 06-17-2022, 11:01 PM   #10
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Quote:
Originally Posted by Dan82679 View Post
I have called a few places and no one recommends changing the cam only so I just pulled the trigger on prc aftermarket heads with supporting mods and a Cam. I am currently at 730 Whp on 93 and 780Whp on full E-85(I have port Injection/Kong Xport/Interchiller) I don't want to go over 850-875 to keep things safe with the stock bottom end.If anything I can switch my upper pulley from a 2.3 back to a stock 2.5.

Ha, should of just had CSP do all that when it was there


I had a feeling this was coming....


Mines going back in soon for the longblock and port injection.


We need to meet up dan.
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Old 06-18-2022, 10:15 AM   #11
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Quote:
Originally Posted by JSH View Post
Lingenfelter has a cam for you, and, unless the Lt4 is different, heads do not need to be removed but you do need to get yourself 16 pen magnets to hold the lifters up while you swap the cam.
All LT engines require pulling the heads for a cam install because the AFM lifters need to be removed and replaced with standard hydraulic lifters...GM choose to use AFM lifter hardware in all engines even if AFM is not active in the tune.
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Old 06-18-2022, 10:53 AM   #12
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Quote:
Originally Posted by KingLT1 View Post
All LT engines require pulling the heads for a cam install because the AFM lifters need to be removed and replaced with standard hydraulic lifters...GM choose to use AFM lifter hardware in all engines even if AFM is not active in the tune.
Personally, I have never done cam-only in any engine, but rather always custom valve train. I suspected the LT4 might be different.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650.
100+ octanes, no eth, no meth, no N2O.
2/23 - 1031/1004 wheel.
4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes).
2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.
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