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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 |
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Manifold hits head, What to do.
I go to test fit my manifold to the head. The #4 loop hits a bolt hole standoff in the head. I have about 10mm before the flange will be flush.
Could I grind down this standoff? Not using it for anything. Didn't bolt to anything and I think I can shave 10mm off it without hitting the head. ![]() ![]() ![]()
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#7 |
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Shave it like your private parts.
Don't be bashful. Be careful with that heat wrap stuff, I've seen some manifolds welds melt.
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#8 |
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I may be off my rocker here, but by the way it looks, you have an issue where 10 mm at the bolt, is really 15 or so at the point of contact, you know what I mean. Its hard to tell. Btw, SELLOUT
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#10 |
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Not what you asked, but I prefer Swain Tech coating over heat wrap.
http://www.swaintech.com/store.asp?pid=10969 |
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#11 |
Post Whore!
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eh, thats pretty rediculous (in ref to first pic)
what about shaving the head in thatone spot instead? ![]() or go top mount....sigh, you do know that wrapping the manifold usually does more harm than good. I never wrap tubular manifolds, I just make sure they 'Fit" and that they are made out of a solid good steel with a good thickness (good examples are peak boost, full race, hybridynamics). They usually dont give off much heat under hood (espcially external setups with dumps) and with the proper tuning (espically timing map) the underhood temps around the mani should not be that hot. You run into more probs with bottom mount tubular manis i guess, because heat soak its higher up and the runners are up top. I use a turbo blanket on all top mount setups and reccomend that, + I wrap the dump pipes fromt he turbos down. But i would not reccoment wrapping the manifold, lead to cracks on two of my old logs, and ive seen some others develop cracks and void warranties in the process of caused by wrapping.
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#12 |
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So, your solution is,
Top mount manifold($1200) Turbo($1500) Downpipe($400) Wastgate($350) Throwing money at the problem is the solution?
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#13 | |
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Quote:
BTW where did you get the black wrap from, or did you just paint it black. looks awesome |
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Quote:
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#16 | |
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Quote:
-manifold is 750 bucks dude. -wg is like 250 if you get 38mm -turbo (50 trim to4e/t3) which will output more than enough like 550 buks(450whp) (use .63 ar turbine with 0-trim turbine wheel for insanity). -downpipe is like 150 bucks max if you have one custom made by a muffler shop (where the hell did you get 400 maybe if you get the kit one). I mean how much are you honestly investing in making "stable" power and "stable boost" with your bottom mount internal setup? I don't even understand why people even bother using these setups for goals over 330whp pretty fricken cheap if you ask me and night and day comparison in tuning, boost stability and efficency as well as ease of working with the system, i mean the gains and reasons for this are endless... if your adamant on convincing yourself this costs 1000000 dollars then maybe you should just sell the silk road manifold and get a tomei... tomeir clears very nicely.
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I had a silk road mani on my s13 it cleared fine. A few years ago i had a signal manifold that hit the same area as yours but on a s13 motor. I shaved the head and it cleared fine.
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#20 | |
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Quote:
![]() ![]() ![]() I wanted people like YOU to read it. im just a poli sci major I don't know anything about turbos or hp ; )
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#22 | |
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My goals are only 300hp. Quick response, MPG and streetability. Stock T28 fits that bill just fine. The goal is not to throw money at a problem. It's to find a solution that still fits your goals. Shaving is the cheapest and looks like it will work with no negatives. The next would be to get another manifold that fits better. I just wanted to know if the cheapest solution was feasible. Why did the Tomei manifolds ship with wrap in that one Group Buy?
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#23 |
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steve shadows, the reason for heatwraps isn't to keep engine bay temps down. it's to keep the temp inside the manifold to the turbo.
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#26 |
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i remember my friends manifold on his s14 sr (greddy) fit perfect. Then when it was on a s13 sr the head had to be shaved in order for it to fit, I think they designed the manifold for a s14/s15 so I think that should clear anything up before you say they did'nt put enough research into it. Just compare the two you will see i'm saying.
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#27 | |
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Quote:
![]() cause the energy to power the turbo comes from the thermal energy and not the pressure differential between the exhaust gas and the atmosphere
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#29 |
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Shaved her down:
![]() and it still hit the head: ![]() Gap is still to big IMHO: ![]() I'm sure I can wrench the manifold down and get it to seal. Yet, it will be pressing against the head which will put stress on it. Making it crack rather quickly. Also, there is a tablespoon of oil in the compressor and turbine housings of my turbo. Leading me to believe that the seals are gone...
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#30 | |
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a 40 trim to4e will get you 300whp and even more torque and is about 1/3 the cost of "turbo from the future" is i guess where your going. It will spool up faster than youd even want, but i know you wont try it so im going to give up on converting you. bottom mount is fine, your manifold is just f-ed apparently...call them up ask them what the deal is with their product... or do they only speak japanese...you can read kanji right? In ref to tomei and the group buy I dont even know what your talking about. Does tomei suggest you used header wrap on their manifold? That would indeed be INTERESTING to find out.
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