Machined LIM - CEG Archives

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I was wondering if anyone has ever machined there LIM where it reduced the height of the intake? I know if the lower intake was machined and an amount of maybe, lets say for example 1/2 inch was removed how much more top end would we gain and how much torque would we lose? I tried looking this up but it seems i can't find any previous data or maybe i typed the wrong info in the search.

But this is only up for disscussion and asking for personal opinions, DO you think
1#leave the way it is,
2#Cut LIM,
3#Get a Spacer and increase the LIM height?

Because i do know of people who can build us Phenolic spacers for our cars, He needed a gasket and he said probably the cost of 20.00 per spacer it would range from 3/8 to 1/2 thick?

What does everyone think?

You would not want the UIM to sit closer to the valve covers.

Plus the fuel rail and injectors wouldn't fit if you took off that much LIM height.

How would you mount the UIM if you milled the top down?
Where would the injectors mount if you milled the bottom?

Let's say for argument's sake it did fit and you also welded on new injector bosses.

Your change in rpm range from shortening the runners 1" would be fairly small. Probably make the ideal range a couple hundred rpm higher. The runner length from the common plenums would be about 6% & 10% shorter respectively.

It might make sense for a high compression engine with some custom cams.

However without other considerable changes to the engine the higher powerband would be wasted and your midrange would suffer.
I'd take it for granted you would completely remove the butterflies with an engine like this so we won't comment of the low end.

Hot intake manifolds act as radiators for your heads. If you cut off that heat exchange your will increase valve and chamber temperture putting you closer to detonation. Cooler air (marginally cooler) or a cooler valves. Its a trade. However i hardly share the runner length argument. Shorter =better racing performance to about 5 inches in total length. You all have substantially long mid port runners already in the head.

I see what your saying but i never got the chance of measuring the distance to see if there will be enough clearence.

Well i don't have the LIM height and i don't know how much clearence is needed but it would be a sweat project to try, only to see what would come out of this.

Everyone knows, shorter the intake the more the rpm range would be lifted, but all i hear is people mentioning that our power starts drifting at 6,800 and after it goes down hill at that point. So i was thinking? maybe this could be a fix, but only the key players on this board will know if this idea would work, and so far it sounds like a no.

I was wondering has anybody heard of anyone else who has tried this?

2 of the key players have already spoken...why would you want to raise the powerband on the SVT? It's already high enough, there's about 0 torque in the 2500 range. This project sounds to cause far more problems than benefits, but it's your car.

Originally posted by bjjranger:
but all i hear is people mentioning that our power starts drifting at 6,800 and after it goes down hill at that point.

hate to tell you but you dont want to be reving the engine this hight unless you got some better bearings, check out demon's site he has this stuff about redlines and all listed on there, i would take that it consideration more then the power drop off

Originally posted by JonnySVT:
2 of the key players have already spoken...why would you want to raise the powerband on the SVT? It's already high enough, there's about 0 torque in the 2500 range. This project sounds to cause far more problems than benefits, but it's your car.

Also please like i stated this was only up for disscussion.
I never said it would work or that i was going to do it.
It was what people drew up on a board as an IDEA!!!

I understand now that a spacer maybe isn't a good idea, and also that shortening the LIM hasn't been done, but it's good to hear what different angles there was to this idea, cause now it sounds to me that this is a bad idea, thanks guys

To this man!!!

Originally posted by JonnySVT:
Seriously, it was cool the first few times you brought up hashed stuff because you're a noob and all, but this is getting out of control now. Are you going to discover that the y pipe is a horrible design and ask if anyone has "modified" it, I know you must have done it on another car already....

Buddy, if i can call you that! Layoff, you have judged me since day one, look if you can't add to the conversation please don't, i don't need someone like you being a prick to me or others for them asking questions. ,you havn't added anything on any thread except "Nothing" the last few threads "nothing" except complaining, so do me a favor don't post on my threads unless you can help, cause you are taking up space and i would like to learn from others. Not learn to hear "well it's your car"?? No, i thought is was my wifes car!! I don't need jokes or laughs or ha ha he he i'm not 16 ok, I'm 25

For those who contributed, i give my thanks to them for having patience.

im 18, and i dont think it is a good idea to go messing with the flow characteristic's of the intake manifolds, there is alot more that it can effect then hp

Here's another idea for discussion ... what about milling out the primary ports on the LIM by 1-2 mm all the way down. Currently, they're tapered and I can't find anyone that will taper mill, so would there be any benefits to a straight mill all the way down? The fuel injector seating should still be ok from what I can surmise. The primary ports on the gasket have about 1-2 mm of hard plastic that can be dremelled away to just before the rubber gasket part that does the actual sealing. Might be some head porting I guess??

I understand the cfm flow would change, but because i couldn't find any information on this site when i searched i thought i would might as well ask to see if people have tried this.

I know when you order performance intakes of course some intakes are set to flow for more top end which means shorter runners and larger ports. OR vise versa

So I thought after reding the LIM from sho-shop i was thinking is there anything else we could possibly do?

Well i thought hey larger ports how about "MAYBE" if it is possible if we can shorten the runners?

This is how i came to this conclusion , of course i understand flow will change, that is a given, that is why i thought if we needed quicker flow with more air to our heads at those rpms, casue it sounded as the LIM could help.

But sorry for mentioning this cause i don't want to fight over this disscussion, and i'm sorry for attacking Johhnysvt
cause I just don't want [censored] talked, everytime some one posts on here, it seems from all the search and readings that i have done people get atacked on here very quickly, so i was hesitant on posting. I decided to take a chance knowing what might happen.

Gear thanks i did look at demons website and read about bearings i do know that bearings are ideal for drivers who want to rev at high rpms incase we get those blown motor rod knocks.

Other than stabalizing the lower which is a good idea especially in what i'm looking to do, i was thinking of everything possible before i decided to start ordering parts.

I'm glad you apologized, but it's still in writing. I'm not attacking you nor thinking of you as a 16 yr old...ok maybe a little on the 16 yr old part, but that's just me, by the way you type and questions you ask. You still didn't answer my perfectly valid question about raising the powerband....I'm being nice to you after the whole y pipe joke, but obviously you're still holding some sort of grudge. I thought we were cool, but I guess not.

I guess I'll go find the E-thug picture....

The apology was to restore some respect within this forum, but of course it's ignorant pieces of s&%t like you who don't have the common courtesy to show any respect.

I apologized, but you of course have to come out on top like your a 16yr old kid who thinks his CHROME rims makes his car look good.

Where I�??m from we call women like winers!I'm 16 huh nice joke, it's not that I hold a grudge but it's I don't like people who comment on others ideas by belittling them.

You weren't born someone great you where taught also.

SO make a long story short we where cool till you made a silly as comment about why would I do that? To the intake, making my original post, if you open your little eyes my dear and sees this was a discussion!!

To answer your question my daughter it is because since our cars where made to rev? "Correct" revving meaning an increase in rpms, which is substantially amount of rotation of gearing.

Well since others have super chips like "I". I was thinking there is no point to get a chip for the high revs like I heard others say. Example "it's nice revving to 7,000 now that I have my chip in" When you don't make power in that high of a rev, so I was coming up with alternative methods to possibly create more power at high revs, since major companies don't sell aftermarket intake manifolds other than sho-shop that are modified.

But I don't like playing e-fights that�??s what nerds do, so why don't you never post on a thread I start and I�??ll never post on a thread you start!!! DING DING DING! WOW maybe two adults could come to a conclusion or maybe it takes one to propose the idea!

Quote:

Where I�??m from we call women like winers!

Is that in english?

Obviously you can only make yourself feel better by calling people pieces of s!#^* and talking giberish, but I have no need to bust out the name calling, that's just plain childish. I'll post in any post I wish to, and I don't wish to take away that freedom from you either, so quit acting like you're in 3rd grade. Back to the topic, yes you can join...
So in effect, you want to shift the powerband, not widen it. Back to my original issue, why? Do you want to make a peaky Honda powerband? As for raising the rpms, I would recommend "checking" your bearings before that. The whole point is, what benefits do you see in shifting the powerband higher in a street car? No more gain in power necessarily, just moving it up and out of the daily driving range. Is this a civilized enough question for you because you still haven't answered it....

BTW, I love CHROME! How did you know?

there is another LIM other then the ShoShop one. its from the cougar's, its refered to as the returnless LIM, its bigger then the stock one by a couple of MM, i believe the stock svt is 33mm/34mm, dont quote me though, and the "returnless" is a 34mm/35mm (i know for sure on that), the returnless's come off 99+ cougar's and can be found on www.car-parts.com

gotta question for you though, why do you want to move the powerband higher up?? right now the powerband is from ~3500rpm to redline(WOT) and if your not WOT then it is ~4000 to redline, what more do you need, thats plenty i think

well if you do shorten the lower intake u do actually move the power band, but you also give up some low end torque and gain some MORE HP in the higher rev area! Which is where our svts make most of our power.

Honestly it wouldn't move the power band as much as you where thinking, It's not going to gain another 1,000 rpms, it's only prob gain maybe another 250-500rpms, enough to still produce more Horse power till 7 grand. I don't have a v-tec so i wasn't going to have a 9 grand redline just 7,000 since our immediate shift brings our rpms back down to 4,000 it would be nice when it backed down, it could be alittle higher than that.
How much higher i don't know that is why i am asking this question. I am hoping others have tried this. It was only a question and an idea for people to throw there two cents in about this intake and to hear what others think, all i heard was people judging the idea then trying to find out if it will actuall work or not. All i was told is about other things than what i asked for, which is what do you guys think of this intake idea?

1#shorten length
2#intake spacer
3#leave it alone?

When i brought this topic up, i was hoping this was already done. I was hoping to get some info, I never said i was going to do this? It was up for discussion!

Gearhead, i was looking at the sp motorsports website about that returnless fuel system, I have a lower intake but it is of a contour 2.5, i kinda needed one from an svt.
But i will look on car-part.com. thanks

might wanna check out these websites

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