Jump to content

Aluminum Intake Manifold

M1ck3y

By M1ck3y
in Modifications & Accessories

 Share

Recommended Posts

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted

Would an aluminum intake manifold heat soak and effect power?

 

I ask because I’m considering BTR’s truck intake manifold. It loses maybe 40 ft lbs in the mid range but gains 60 plus horsepower/torque up top out to 7000.

 

 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

Anything metal will heatsoak, no way around that. Only way to cool the intake charge is with a intercooler or heat exchanger of some sort.

 

Ask yourself this though, how often are you riding that 5,000-7,000rpm rev range? Probably not very often, losing that 40ft/lbs is a lot in that 2,500-5,000rpm section, to me that's not worth it. Adding a camshaft to the engine that suits the proper torque converter would be a better idea to me.

  • Like 2
M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted
2 hours ago, CamGTP said:

Anything metal will heatsoak, no way around that. Only way to cool the intake charge is with a intercooler or heat exchanger of some sort.

 

Ask yourself this though, how often are you riding that 5,000-7,000rpm rev range? Probably not very often, losing that 40ft/lbs is a lot in that 2,500-5,000rpm section, to me that's not worth it. Adding a camshaft to the engine that suits the proper torque converter would be a better idea to me.


I am adding a btr 220 cam. And your right I spend very little time at peak rpm. But I’m looking for full throttle power.

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

I don't that that adding a camshaft is going to give up 40-60hp throughout the rev range if not more. The stock truck intakes are really good for torque.

M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted
6 hours ago, CamGTP said:

I don't that that adding a camshaft is going to give up 40-60hp throughout the rev range if not more. The stock truck intakes are really good for torque.


No, the camshaft doesn’t give up much, if any in the mid range. But the Btr truck intake manifold does.

 

Heres an example on an L8T. The third intake manifold in the graph is a short runner design and it gives up even more in the mid range.

 

 

IMG_0110.png

SeekAndDestroy Enthusiast

SeekAndDestroy

Posted
Posted
12 hours ago, M1ck3y said:

The cam does give up a bit below 2500…

 

I have that cam in my 2018. BTR makes quality stuff. With headers it added +100 hp and +80 torque. I don't notice the tiny loss of torque below 2500. After 2500 it takes off like a rocket. The idle chop sounds so good. Been trouble free for 30k km

  • Like 1
M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted (edited)
1 hour ago, SeekAndDestroy said:

 

I have that cam in my 2018. BTR makes quality stuff. With headers it added +100 hp and +80 torque. I don't notice the tiny loss of torque below 2500. After 2500 it takes off like a rocket. The idle chop sounds so good. Been trouble free for 30k km

 

Was that with e85 too? What Catback are you running? I need to change mine from Corsa Sport; its just too loud with headers.

Edited by M1ck3y
SeekAndDestroy Enthusiast

SeekAndDestroy

Posted
Posted
2 hours ago, M1ck3y said:

 

Was that with e85 too? What Catback are you running? I need to change mine from Corsa Sport; its just too loud with headers.


No, tuned for 91. E85 is hard to find here, only one station in the whole city has it. 
 

I have full custom exhaust. 1-3/4” Kooks headers, kooks y-pipe with high flow cats then it duals into 2.5” pipes with Dynomax mufflers. Loud AF. I’ve heard that the Magnaflow 12909 muffles headers good. 
 

This is the dyno sheet. They said it was a 4th gear pull, and it would have 5-7% more power if it was done in 6th.

 

IMG_0854.thumb.jpeg.49660627be24964522253dc2f16bf7e4.jpeg

M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted
6 hours ago, SeekAndDestroy said:


No, tuned for 91. E85 is hard to find here, only one station in the whole city has it. 
 

I have full custom exhaust. 1-3/4” Kooks headers, kooks y-pipe with high flow cats then it duals into 2.5” pipes with Dynomax mufflers. Loud AF. I’ve heard that the Magnaflow 12909 muffles headers good. 
 

This is the dyno sheet. They said it was a 4th gear pull, and it would have 5-7% more power if it was done in 6th.

 

IMG_0854.thumb.jpeg.49660627be24964522253dc2f16bf7e4.jpeg


yesh I was thinking I’d try magnaflow out. They have a single exit 4” with two mufflers.

 

Nice numbers. I’m getting my work done at the same place!

  • Like 1
SeekAndDestroy Enthusiast

SeekAndDestroy

Posted
Posted
3 hours ago, M1ck3y said:


yesh I was thinking I’d try magnaflow out. They have a single exit 4” with two mufflers.

 

Nice numbers. I’m getting my work done at the same place!


They are good. If you can afford it, get an aftermarket converter with a slightly higher stall than stock. The only issue I have is when I’m coming to a stop the cam will push through the brakes. Not every time, but it’s pretty sketchy on a slippery snow day

M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted (edited)
1 hour ago, SeekAndDestroy said:


They are good. If you can afford it, get an aftermarket converter with a slightly higher stall than stock. The only issue I have is when I’m coming to a stop the cam will push through the brakes. Not every time, but it’s pretty sketchy on a slippery snow day

 

Yikes, I didn't think this cam was that aggressive. Looks like I'll have to be quick on shifting to neutral. Converter isn't in the cards. 

 

Do you know why Davenport didnt dyno in 6th? my under standing is the driveshaft is good until 125ish, was it your tires?

Edited by M1ck3y
M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted (edited)
On 5/16/2025 at 3:23 PM, CamGTP said:

Anything metal will heatsoak, no way around that. Only way to cool the intake charge is with a intercooler or heat exchanger of some sort.

 

Ask yourself this though, how often are you riding that 5,000-7,000rpm rev range? Probably not very often, losing that 40ft/lbs is a lot in that 2,500-5,000rpm section, to me that's not worth it. Adding a camshaft to the engine that suits the proper torque converter would be a better idea to me.

 

I've read that the air is moving so fast through the intake that it doesn't really have time to absorb any heat before it enters the cylinder. Is that true? I'm also wondering if you have any real world experience with an aluminum intake; did you notice higher iat's over a plastic one?

Edited by M1ck3y
SeekAndDestroy Enthusiast

SeekAndDestroy

Posted
Posted
2 hours ago, M1ck3y said:

 

Yikes, I didn't think this cam was that aggressive. Looks like I'll have to be quick on shifting to neutral. Converter isn't in the cards. 

 

Do you know why Davenport didnt dyno in 6th? my under standing is the driveshaft is good until 125ish, was it your tires?


It’s not very often, maybe once a month if the tranny downshifts funny. It’ll do one lurch forward. I just mash the brakes harder, lol. 
 

In 6th gear at 6100 RPM I’ll probably be going 180-200 Km/hr. The driveshaft might handle that RPM but the tires are not rated. Just safer for them to dyno it in 4th and do the math after. 

M1ck3y Senior Enthusiast

M1ck3y

Posted
  • Author
Posted
31 minutes ago, SeekAndDestroy said:


It’s not very often, maybe once a month if the tranny downshifts funny. It’ll do one lurch forward. I just mash the brakes harder, lol. 
 

In 6th gear at 6100 RPM I’ll probably be going 180-200 Km/hr. The driveshaft might handle that RPM but the tires are not rated. Just safer for them to dyno it in 4th and do the math after. 


makes sense. I just used a calculator to figure out the rpm vs speed. Looks like I’ll have to do a 3rd gear run with my heavy LT tires…

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      Yes.   Yes.   We might be intermingling ideas with the term 'severity', in one of my past vehicles it could pull up DTC via the vehicles own user interface, at any given time when one would do this there would be an assortment of codes that were 'trivial' including 'communication' issues. This would generate a bunch of, potentially false alerts or some many that they would get ignored. Which you mentioned earlier.    You also mention several things that might be redundant with the vehicles own systems or indicators: The truck has an oil pressure gauge, monitoring it via this other system wouldn't be a priority except in comparison to other values or if there is an actual oil pressure problem.   Same thing for miss-fires or other problems, the MIL already signals the operator to an issue...   ...to the point about what one wants to see first, if there is a miss fire detected, I want to see miss fire counts or fuel trims first, if I have an oil pressure problem I want to see the oil pressure first. So, perhaps the 'systems' that are showing abnormalities are what gets displayed first.   I think your device is what connects at the OBD port, ease of use for the consumer, it could still have a 'pass-through' port for a second scanner, computer, etc.   Yes.   Based on my comment above, if an error appears, the report would be more specific to the system having an error.
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Saturday 87 was 2.98 at the local meijer when I filled up my car with 93.
    • RyanbabZ71
      Slate Electric Truck

      By RyanbabZ71 · Posted

      I like the idea.  I thought about putting a deposit a few years ago when they first dropped.  I still want to drive one and have inquired about doing this with them, like a ride and drive event they said they are coming but it hasnt happened even with them built in Indiana.  
    • asilverblazer
      Transmission Woes :-(

      By asilverblazer · Posted

      That's a tough spot to be in, I personally would question spending 1/2 the book value on a repair vs. selling it as-is.    Presuming you own it out right, sell it for 10k and have a down payment for a replacement truck, or spend 10k on the one you already have...   I still think there is a cheaper transmission out there via recyclers, aftermarket or rebuild. (Cheaper than 5k for the unit)
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Sadly, there's a drought of good 92-95 4.3 cars at junkyards in the area otherwise I would have gone fishing for parts. Not that they don't come up, there's just nothing good in the yards right now.   I tore into the intake yesterday evening, easier than I thought, and I might have this problem licked for cheap. Two of the intake studs came up with the bolt on removal, no big deal but that's why it looks funny with studs only on one side.   There's pooled gas on both sides of the plenum. Highlights boxed in green. Picture-right side has an obviously split pressure line from rubbing on the #5 injector nylon line. #5's line is worn in that spot but not all the way through. Passenger side intake (picture left), not sure, but I think the pressure regulator is hosed. Rebuilt spiders don't come with the pressure and return hoses so I'll need to replace those no matter what. A pressure regulator is $30 so I'll try that and if I end up having to swap the whole spider, it was $30. I'll be grinning ear to ear if that's all I need.   Parts arrive Tuesday.   Sure enough the shop was here before. That's a new gasket. Vacuum lines and wiring are a tangled mess, I sorted that out last night as well. Spent about an hour just picking up general slack and shoddy reassembly around the engine bay. Cheek-pokered the battery tray, got it all cleaned up. Sometimes things just need a little elbow grease and a few minutes of time to be right again.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...