Finished my intake manifold

[float_6969]

Port matched, polished, removed butterfly's and had holes welded up. Removed idle control stuff and drilled and tapped out holes to house the air temp sensor for my SDS and a 90° fitting for the air connection for my 3 bar(30psi) MAP sensor for my SDS. I also built a bracket to hold the MAP sensor using the 2 bolt holes that used to be for the grounds, and then also drilled and tapped out the stock Engine Temp sensor for the SDS.

I still need to build a new throttle cable bracket so that I can get my cruise to work and I have found a company that makes thermal gaskets for the CA18DET and I am working on MAYBE (BIG MAYBE!) getting a group buy together. They aren't a sponsor, and don't really want to become one, so IDK if it's going to work out.

Sorry for the crappy iPhone pic. I forgot my camera.

[r34 gtr]

DO NOT MOUNT IAT IN INTAKE MANIFOLD!!! WILL HEAT SOAK!! MOUNT IN INTERCOOLER PIPING ONLY!!!

Trust me here. 1900 F EGT's are bad, M'kay?

Nice job on the manifold though!

I'm down on the gaskets

Aaaaand, did you ever get that torque plate made, you know, so I can borrow it and have my block properly bored?

[boost_boy]

DO NOT MOUNT IAT IN INTAKE MANIFOLD!!! WILL HEAT SOAK!! MOUNT IN INTERCOOLER PIPING ONLY!!!

Trust me here. 1900 F EGT's are bad, M'kay?

Nice job on the manifold though!

I'm down on the gaskets

Aaaaand, did you ever get that torque plate made, you know, so I can borrow it and have my block properly bored?

Glad you removed the butterfly valves and all the other non-necessities that the CA's intake manifold posess. I'm with Tim on the air temperature sensor in the fact that it will be living in much volatile temperatures than say 6-8 inches before the throttle body. I would mount the MAP sensor on the chasis as well, but that's me and I've gotten used to doing it that way and it seems to work just fine. Other than, excellent move on the modifications.

Dee

[float_6969]

If I weren't using the thermal gaskets, I wouldn't have put the IAT there, but if this gasket works like I think it will, that part of the plenum should run about 50°F cooler than it normally would. That combined with the open element style of IAT that I used should minimize the effects of heat soak. This is a GM IAT sensor that was originally mounted in the intake manifold by GM, so I'm thinking it'll be ok. IF it doesn't work out, I'll move it, it's just gonna be a pain to do because of the type of intercooler I'm going to run and where it will be placed.

As for the MAP sensor, I was concerned about vibrations, but almost all of the GM MAP sensor are mounted directly to the manifold, so they are designed to handle the heat and vibrations.

I'm just a nut about things being clean. You should see how I've mounted my coil packs and wiring harness...

[float_6969]

Aaaaand, did you ever get that torque plate made, you know, so I can borrow it and have my block properly bored?

No, they wanted $450 to have it made, and I don't have the dough to lay that out for a thing i'll only use once and will probably take years to break even renting it out.

[r34 gtr]

I hear that, $450 is a bit much for someone who doesn't build one a week.

Good luck with that gasket, let me know if it works because I too need that gasket, and have my GM open element IAT in the same place as you.

[zero_gripS13]

man if ur were in ohio id say take it to who did my block, they took a hunk of aluminum and made me a torque plate (i didnt get to keep) but it was nice of them, when i asked him he said he just makes em himself for blocks so he dont have to buy em and s***...

[zombieslider]

any word on that thermal intake manifold gasket?

is it the gizzmo one?
Modified by zombieslider at 5:43 PM 9/21/2009

[zmannz]

We are talking about the thick plastic gaskets like they sell for honda motors, they go between the metal pieces of the motor to reduce conduction temperature changes in the intake tract?

[zombieslider]

ya thats what im talking about

[Fleemer]

Glad you removed the butterfly valves and all the other non-necessities that the CA's intake manifold posess

why is everyone such a hater on the "power valves" ? They are great if you DD. The extra "power" is noticeable. Without them the car feels like a rotary at low rpm :P


Modified by Fleemer at 3:59 PM 9/22/2009

[meminto]

Fleemer, I dont understand it either, a stock jdm CA head flows 220cfm, with the whole manifold assembly attached it flows 216cfm. This equates to a 4cfm loss..

I have recently finished helping a mate with a rebuild, he has a 2876r .86 turbo. Before the build he mentioned how dissapointed he was with the lagginess of the turbo, the previous dude had built it and removed the butterflies..

We built the motor, and I advised to reinstall the butterflies and make sure they were working correctly, he is now over the moon with the response in the bottom end and his goal will not even come close to outflowing the stock head...

Not that I am ragging on people for not using them, people have there reasons and quite legitamite ones too, I myself don't use them as a result of the 30 odd % increase in my head flow..

If the sole reason for removing them is because of the perception of a flow restriction, that is an internet myth that has been busted and I have posted the flow data on this site in a previous post that provides the evidence..

I am unsure of the value of the phenolic gasket just yet, but I am interested in your data float when you do have some info, I want to see if it does make a significant difference. I was going to use one myself but I decided against it for a number of reasons..
Modified by meminto at 10:54 PM 9/22/2009

[zombieslider]

what were those reasons if you dont mind me asking?

[meminto]

I don't mind, send me an email or add me to msn

[email protected]

real time discussion for the win

[r34 gtr]

I hate on the intake butterfly valves because I strongly dislike vacuum lines. There, I said it.

[float_6969]

Yes, I was talking about the plastic gaskets. I still haven't heard anything about them becoming a sponsor, so it's not sounding like a group buy is gonna happen.

As for the valves, I have them in my current manifold. I removed them from this manifold to measure the difference.

They DO make a big difference in the bottom end and how quickly the turbo spools. If I was going to keep the motor under the 350hp mark, I probably wouldn't have bothered, but I plan on exceeding that mark, and so I removed them. I also have another plan for filling in the bottom end and spooling the turbo that shouldn't be as restrictive.