Guys what do you think about this sheetmetal intake manifold is it worth it?

[na90dsm]

i looked at that ebay intake and saw 2 things i didnt like.

first the runners arent tappered. every intake i have seen that flowed great and actually made nice power gains has tappered runners. even the damn dejon intake has tappered runners.

2 they had the entrances to the runners rounded off for a smooth transition into the runner from the chamber. i bet if you got a pic of the inside of the mani its not rounded at all. ask the guy for pics. ill put 20 bucks on it

i saw it and ebay stuff to me is gettin really sketchy lately. crap products that will nto last long at al. just a way for people to make a buck

 

[coltboostin]

A 20whp h/p gain means nothing if you can't say WHERE in the rpm curve the gain was made. More importantly what were the LOSSES in torque and where did they occur?


Hal

This is just one example with what I was eluding to. I never stated that manifold x would be better than stock for everybody, I never said manifold y will do better in the whole RPM range either.

A simple question was asked- Can an intake manni yeild a 20 hp gain or more- and the simple answer is YES. Did I say over the whole RPM range? Did I say their will be no low RPM torque losses? NO so dont put words in my mouth to prove a point that does not exsist.

 

[na90dsm]

yup yup hes right. it will net that gain but there is so much surronding that statement that wasnt stated. there will be variationg to it on every car that ill be different btu he stated a simple fact it would net that gain and nothign more.

 

[coltboostin]

yup yup hes right. it will net that gain but there is so much surronding that statement that wasnt stated. there will be variationg to it on every car that ill be different btu he stated a simple fact it would net that gain and nothign more.

Thankyou. I didnt think people would look that deep into the statement, or otherwise I would have given the whole shibang in the first place.

 

[na90dsm]

there is a thread on here called head flow that someone did specs on how much the 4g63 head flows and all. polk performed all the tests and he did it with different type manifolds as well. non tappered runners, tapered runners, different chamber sizes and tb bores the whoel 9 yards. it showed many differences between the 2 designs and the ones without tappered runners and all didnt flow nearly as much. WARNING: itsa long


http://www.dsmtuners.com/forums/showthread.php?t=53893

 

[Hal]

This is just one example with what I was eluding to. I never stated that manifold x would be better than stock for everybody, I never said manifold y will do better in the whole RPM range either.

You made a blanket statement that you could gain 20 h/p from THIS manifold by answering the question the way you did (go see post #10 in this thread).

Your answer "yes, and much more" implies you have knowledge of this specific manifold and it's performance characteristics.

I'm sure that I am not the only one that read it that way.

Hal

 

[na90dsm]

that specific manifold will net tops 20 on very top end. read the link i just posted. 6 inch runners and that size chamber will out flow stock but not by much. with the right suporting mods being a fully modded motor and all it might might see 20hp absolute tops imo on a fulyl built motor. not worth it imo

 

[anconover]

What does a fully built motor have to do with how an intake manifold is going to perform? Somewhere along the lines i think ppl started thinking a built motor is going to make you so much faster? absolute tops of 20hp from a 'fully modded motor'? Thats another 100% random guess. Theyre so many factors per setup etc, you really shouldnt even bother throwing around numbers. Especially with no reasoning to back them up.

The manifold is a poor design, poorly fabricated, not a good thing about it IMO. And remember, just because the runners are 6" doesnt mean its going to perform a certain way because other manifolds utalize 6" runners. Thatd be a poor statement to make. No one can claim this is going to make crap, because no ones tested/run it. Only thing we can say is, its a POS.

 

[Scrymerr]

I have a good idea, everyone should stop arguing because no one should buy this piece of crap. Regardless if the design was good, it apparently is made like crap.

Just save your pennies, do it right, and buy a magnus.

--Dan

 

[na90dsm]

noody is really arguing just stating opinions and facts. i was thinkin abotu gettin the dejon mani because it looks to be made pretty good. pics show its a good design and i was reading about specs on it and it appears to flow pretty good low end and mid vs flowing like a raped ape up top and hurting everythign else.

just my 2 penies

 

[Stapl3]

that specific manifold will net tops 20 on very top end.

it might might see 20hp absolute tops imo on a fulyl built motor. not worth it imo

You contradict yourself. If you don't know anything about the manifold, then don't say shit like this.

And built motor? If some asshat has rods and pistons in his motor, the manifold will produce higher #'s? Just stop posting.

 

[na90dsm]

You contradict yourself. If you don't know anything about the manifold, then don't say shit like this.

And built motor? If some asshat has rods and pistons in his motor, the manifold will produce higher #'s? Just stop posting.

yea sorry for the contradiction. that was missworded.

and yes with rods and pistons it will produce slightly higher numbers. but if they do head work it will make a bigger difference. i shoulda been more specific with my statement. when i said built motor i meant the works, lets say the guy is runnign a big rod bottom end, 1mm valves, hks 272 cams, level 3 head, front mount and blow thru setup he might see 20hp.

some clarification. sorry abotu the above posts

 

[dsmrunaway1]

u guys are unbelievable....does anyone actually own one....please let me know....because its not a piece f garbage..it is made out of aircraft aluminum...and it pressure tested to more pounds then any of US will ever see....u guys are ridiclous...it really pisses me off to see a guys work done is jus ripped on by a misleading website...by some of the stupidest people 2 that prob no nothing and jus have eyes and say it LOOKS like crap...hahaha like i said before own one first....

 

[na90dsm]

yea i emailed the guy to see some pics of inside the plenum. that will make my desicion. if i liek the way it looks inside ill make you happy, buy it, put it on my friends car and test it.

that make you feel better. ill back you up in saying seeing the inside will make up my mind. i saw the outside of the pnishment header when they first started makign them. it looked to be a good design and i was stoked. bought on from someone who had it and the inside is shitty as hell. but it was there first design.

who knows maybe dude has a good design inside that thing. ill await his reply and poct his pics for you guys.

 

[dsmrunaway1]

yoo man go on the webiste and u can see inside and u can get with velocity stacks with it 2......www.jmfabrication.com latz Garrett....

 

[dsmrunaway1]

Correction: www.jmfabrications.com latz....

 

[anconover]

The built motor statement is still a poor statement to make. You have that great built motor, and a 13g. How much do you think that manifold is gonna help? And its not the peak HP gain your looking for from the manifold, but the change in the curve....

And i dont care if i dont own that manifold, or if it was pressure tested. It looks like it was mig welded and the welds were ground to try to be cleaned up. Maybe we can get some more pics of it with the lights out so we can really see it.

Theyre is NO design to that thing at all. He took a tbody flange, welded some sheetmetal to it in the same shape as the flange, (no taper). He then took some square stock aluminum and welded it to that plenum and flange.

 

[dsmrunaway1]

oh yea and jus for ur guys info he went 11.3 with that mani with stock cams and head....so therefore to handle that its not a $hitty mani....

 

[na90dsm]

nice man i didnt know he had a website.

that link is for th eother one pictured. im talkin about the ebay manifold. heres the one im talkin about. must have been some misscomunication. that JM manifold looks great to me. i was talkin abotu this one.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7939752313&category=33742


http://i19.ebayimg.com/01/i/02/fc/f4/f3_1_b.JPG

http://i24.ebayimg.com/01/i/02/fc/dc/44_1_b.JPG

http://i19.ebayimg.com/01/i/02/fc/f4/f6_1_b.JPG

 

[anconover]

You guys really are incredible... People have gone 11.3 on a stock manifold, so what kind of comparison is that? Whatd he drop from installing it, what kind of gains? Howd it improve top end, did it kill low end? Theyres no info on it other than the pictures of what looks like mig welded sheetmetal. Why not some up close pics of those wonderful welds.

No point in anyone arguing it anymore, if you like that beatiful cheap manifold, go pick 1 up for 300$

 

[dsmrunaway1]

the runners are tapered man...here for everyone....from his website... If it's horspower your looking for, this is the manifold for you. Introducing our new aluminum sheetmetal intake manifold. These are hand made, TIG welded from high quality 6061 T6 aluminum. The flanges are all CNC waterjet cut for precise fitment. Each plenum is press bent to reduce the number of welds which will assure maximum strength under high boost applications. The plenum measures 16" long, 4 1/4" deep, the plenum also features a 1" taper design to even out the airflow, with a runner length of 5". Velocity stacks are incorporated into each one to improve airflow by 10-15%. The vacum ports are placed on the underside of the plenum for a clean professional look. They are finished off with a show quality, mirror like buff and polish.
These manifolds are designed for DSM's with elimintated EGR. Some modifications to your coil pack mounts, and upper intercooler pipes may be needed, as this manifold sits down alot lower then stock. latz...

 

[anconover]

Woa wait a minute.

www.jmfabrications.com has nothing to do with that manifold. Jim mckeone has the nice pic that was on the first page. Not that POS. Totally different... Jim went 11.3 on the nicely built manifold found on his website.

Dont try to get him mixed up with that ebay shit manifold. Jim mckeones manifold is very well built, and 100% different from that ebay garbage.

 

[na90dsm]

nah dude im with you abotu the ebay manifold. i agree its junk. that my statement.

hes talkin about the mani form jm fabrications. that manifold to me is a good design. got mixed up on which mani was bein talked about.


that ebay mani looks liek its made form home depot shit. that jm fab mani may be my next.

i thought he was arguing the ebay manifold was good and had the stacks. my bad guys i got it mixed up on which one he was talkin about. he was talkin about the jm manifold not the ebay one. i was talkin about the ebay one and not the jm.

 

[dsmrunaway1]

oh shit, i thought u guys were talking bout jim's mani i was ready to fight everyone who was saying crap bout that guys stuff...his stuff real good...sry for the confusion..but that one on ebay...don't look to swell....but who knows...don't judge a book by its cover.. ....

 

[na90dsm]

yea thats what i was tryin to say. we got all screwed up for a minute.


ok i say we go back and fix the screw up.


the jm mani is good. awesome manifold from what i have heard everywhere.

the ebay manifold is junk. so is everything else on ebay.