i got to thinking about my venom manifold and it being aluminum and realized that its bolted right to the head, its GOTTA be getting pretty hot right there isnt it?
how much does that heat really effect power output? it cant be a GOOD thing im sure...
i know the stock manifold has a plastic 'flange' if you will that goes in between the head and manifold, but i didnt use it when i installed my venom. anybody think that if i install it my IAT's will go down?
anybody make a stock phenolic flange? chris...??
Edited 1 time(s). Last edited Tuesday, July 24, 2007 1:22 PM
I dont think its a problem, or GM wouldnt have made every single quad four carry an aluminum intake infront of it, that attaches directly to the head, i.e. no phenolic flange or spacer.
Fst Cavy wrote:I dont think its a problem, or GM wouldnt have made every single quad four carry an aluminum intake infront of it, that attaches directly to the head, i.e. no phenolic flange or spacer.
Every thought maybe that is why they got away from the aluminum manifold?
I think it makes a bigger difference than most people realize. Just another reason I still run the factory manifold. I wish there was a easy way to test it out.
FU Tuning
well, a good thing i have going for me is that the venom is aluminum piping and polished, vs the HO manifold being cast and rough.
Edited 1 time(s). Last edited Wednesday, July 25, 2007 5:56 AM
If you really think about it, how much heat can be really transfering to the manifold. As long as the venom manifold you have on there is mounted the same way as the stock one, it shouldn't be getting hot enough to really matter. If the stock plastic one doesn't get remotley hot enough to burn, warp, or melt (Mine never even gets warm), then the aluminum one you have on there probably isn't in contact with enough heat to bother with either. I would prabably use the stock mounting flange your talking about, but other than that I wouldn't worry.
well, idk... i have YET to feel the manifold after the car is up to temp. but the way i see it is its actually touching the head, and that bastard gets extremly hot, maybe not so much on the intake side, but the EGR tube does go clear through the head and over to the intake side, i have a block off plate over the hole, but the exhaust is still circulating in that area.
Metal intake manifolds get HOT. You should probably see about a 5-10*F air temp increase (depending on RPM) when switching to a metal mani.
fortune cookie say: better a delay than a disaster
GM replaced the aluminum to composite because.
-Cost-- Plastic is cheaper then aluminum and cheaper to manufacture.
-Weight-- Plastic weighs less than aluminum and you really want less weight on the front of the car.
-Heat-- Plastic conduct less heat which in return less hot air goes into the engine.
>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----
Try wrapping it in heat tape. If it's conducting heat from the head don't know if that would help though
^^^ No, then it would just get hotter, no cool air to flow over the intake mani.
lmao, i wouldnt cover this shiney beast up with header wrap hahahaah
anyways, the venom is actually lighter then the stocker manifold so weight isnt an issue.
z yaaaa wrote:lmao, i wouldnt cover this shiney beast up with header wrap hahahaah
anyways, the venom is actually lighter then the stocker manifold so weight isnt an issue.
Proof of this??? I would like to see that.
FU Tuning
well i aint taking it off to proof you wrong, just trust me i held the plastic in one hand and held the venom in the other, the venom was lighter.
it looks like it would be heavy, but i assure its not. were only talkin 1-2 lbs here, nothing to really worry about.
z yaaaa wrote:well i aint taking it off to proof you wrong, just trust me i held the plastic in one hand and held the venom in the other, the venom was lighter.
it looks like it would be heavy, but i assure its not. were only talkin 1-2 lbs here, nothing to really worry about.
Were you holding the Venom with the arm you beat your meat with since it is the stronger arm and it feels lighter?
>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----
Mr.Goodwrench-G.T. wrote:z yaaaa wrote:well i aint taking it off to proof you wrong, just trust me i held the plastic in one hand and held the venom in the other, the venom was lighter.
it looks like it would be heavy, but i assure its not. were only talkin 1-2 lbs here, nothing to really worry about.
Were you holding the Venom with the arm you beat your meat with since it is the stronger arm and it feels lighter?
come on.
the venom is lighter. done and done.
i know when i get the chance i'm upgrading to the saab 9-3 aluminum manifold. My reason its a lot easier to Direct port an aluminum manifold than a plastic one... plus the runners are direct from TB to head, whereas the plastic one funnels down & up... scares me with possibility of puddling
http://www.motortopia.com/cavyfreak442/cars
Best ET to Date: 14.251 @ 98.51 mph. 13's or Bust Baby!
I put a bag of ice on the HAHN manifold between races. That beotch gets pretty hot, but it also has been 100*+ outside at the races.
wow... i hadnt had a chance to see if i was right yet or not til today..
car had been siting in my garage and it was pretty cool in there, drove it about 2 miles to my work. felt the manifold, it was so damn hot you seriously couldnt hold your hand on it at all. worst part was the car wasnt really even up to temp. yet. im sure the 95 degree weather has some to do with it, but like i said... it was sittin in the garage and was decently cooled off before i drove the 2 miles.
do you guys think i could benefit from get an alcohol injection kit, or something? i know it wont help a whole lot, but damn... something has got to be done. the venom gets really hot.
Maybe you could get the phenolic HO adaptor flange and modifiy it to match your ports. I did that with the HO intake and the 086 head and it doesnt get too hot. I mean it isnt cool but its not unbearably hot, has to make a difference in performance.
We found with my friends SC, running it intercooled and meth, that it was better to leave the car running. Once the car shut off everything seemed to heat soak pretty bad. A pacer and meth are probably good ideas.
Well, I know that that heat transfer does negativly affect things. I wouldn't have believed it myself until i started to get into the honda world. Hondata makes an intake manifold gasket for like $50. I never knew what it was, so i looked into it. It's a .5 inch piece of plastic to prevent heat transfer from the heat to the intake manifold. They have another one for the throttle body. No, it doesn't do much, but they have dyno results to prove something small in terms of increase....
That's all i know.
