GM Performance Intake Question
Thread Starter
Instructor
Joined: May 2018
Posts: 237
Likes: 63
From: Central CT
GM Performance Intake Question
Has anyone seen the performance intake from GM part number 81452141. It costs around 625.00 and shows a high flow dry filter with the jake skull on it. Problem is for LT1 engines shows no gain in hp and around 10hp on lt4 and 17 on lt5. How can an intake with a advertised 30% more efficient flow rate not provide even a small amount of power on a lt1. How would better flow lead to no gain. I'm not looking for big numbers but not even a 5 hp bump when halltech or others show decent little bumps. Any ideas?
Advanced
Joined: Mar 2017
Posts: 50
Likes: 18
This is my thought . On the base LT1 the air in is in balance with air out . If you added a cat less X pipe and a PTB now you have increased flow on both ends with the new intake . Logic tells me there should a gain . Part # 84152141 is over priced . Shop . I have seen it for around 500.00$ . Corvettes forever ! dk,
Thread Starter
Instructor
Joined: May 2018
Posts: 237
Likes: 63
From: Central CT
def not cheap option. I like the fact it is a GM product and won't touch warranty. I should have mentioned before I plan on adding either the corsa or borla x pipe and cat back system. I will do headers eventually and void the warranty but not for at least a year or two. Car is new with full 3 yr warranty in tact.
Tech Contributor
Joined: Jan 2015
Posts: 5,684
Likes: 1,449
Virtually no gain because the stock intake is nowhere near it's limit with a stock or lightly modified LT1. Its just an airbox. Get a full intake system at least. Still not worth the money but a bit less of an obvious waste of money.
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
I would spend a little time and money on what I think is a simple improvement.
Under the car at the right corner of the grill/bumper cover you will find a triangle hole. This is the air intake to the filter. Next to this hole is space for a new opening of your chose.
In the engine bay there is a gap next to the radiator between the frame and fender. Hot air gets into the intake path. Close this opening.
Under the car at the right corner of the grill/bumper cover you will find a triangle hole. This is the air intake to the filter. Next to this hole is space for a new opening of your chose.
In the engine bay there is a gap next to the radiator between the frame and fender. Hot air gets into the intake path. Close this opening.
Tech Contributor
Joined: Oct 1999
Posts: 40,995
Likes: 9,759
From: Charlotte, NC (formerly Endicott, NY)
Has anyone seen the performance intake from GM part number 81452141. It costs around 625.00 and shows a high flow dry filter with the jake skull on it. Problem is for LT1 engines shows no gain in hp and around 10hp on lt4 and 17 on lt5. How can an intake with a advertised 30% more efficient flow rate not provide even a small amount of power on a lt1. How would better flow lead to no gain. I'm not looking for big numbers but not even a 5 hp bump when halltech or others show decent little bumps. Any ideas?
Bill
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Le Mans Master
Joined: May 2000
Posts: 8,729
Likes: 1,505
From: Redmond WA
I am of the opinion that the stock filter is perfectly adequate for the LT1 and yet undersized for the LT4. I think the airbox is OK in both applications.
Increasing the filter area will increase power on the Z06 because the LT4 is choked off by the LT1 filter in stock form.
Adding it to the LT1, which already has enough airflow, does nothing but give you a Jake logo under the hood I think.
Increasing the filter area will increase power on the Z06 because the LT4 is choked off by the LT1 filter in stock form.
Adding it to the LT1, which already has enough airflow, does nothing but give you a Jake logo under the hood I think.
Tech Contributor
Joined: Jan 2015
Posts: 5,684
Likes: 1,449
If the engine can't use the increased air flow then there won't be any increased power. Basically, if the filter gives you 1000 cfm per minute air flow but your engine at wide open throttle and max rpm only uses 700 cfm per minute the extra 300 cfm doesn't do anything for you.
Bill
Bill
