raksj04

iTrader: (1)

I was doing some research about FMICs' and I found the godspeed, I knew about the Corksport, however I noticed that there is about $1 difference in price not including shipping. The godspeed has the TB adapter the CS does not. The Corksport seems to be bigger and angled, the godspeed flat maybe smaller. The corksport looks like the bumper with fit with less mods. I would like some realworld feedback. I have no P/S or AC. My car is a S4 with a JDM motor swap.

Hypertek

iTrader: (3)

I honestly dislike godspeed, though i hear nothing wrong with their fmic, it is a greedy copy. You will always have to defend it being a copy as opposed to the corksport.
But if you purchase corksport, you are supporting a vender of rx7 goods, so you can't really go wrong there.

The godspeed and any jdm fmic (hks, greedy etc) mount the intercooler opposite of the corksport, meaning the piping is on the bottom instead of on the top.

You may have to lose your front bumper support regardless of which one you go with .

Black Knight RX7 FC3S

iTrader: (7)

I can tell you that the godspeed intercooler kit is going to need modifications to fit. The core is just huge and you will have to hack your bumper and take off your front bumper support. The piping are in the right position most of the time, some time requiring some persuasion to route it. The TB elbow, according to some people fits, some dont. For me, it didnt fit right up, I had to drill and elongate the hole to line up to the FC TB. Also, hope you have a good fan, or some really great airflow to the radiator. The core being so big and thick on the Godspeed blocks a lot of airflow from going to the radiator and oil cooler.

raksj04

iTrader: (1)

I read the corksport directions as well and they include templates for the cutting. The last time I got parts from corksport, AL rad and hoses. the stuff didnt fit right. it looked like it was in the jig wrong and the tabs were not welded on straight. The hoses needed to be cut as well. I have a JDM motor if that makes a difference.

Bamato

iTrader: (6)

Personal experience with godspeed equipment for me has been poor. I've never bought a FMIC from them, but I wouldn't imagine the build quality would be much better than their junk radiators. So IMHO, I'd stick to Corksport. At least with CS, you have a manufacturer you can call for support.

raksj04

iTrader: (1)

^ this is true. Corksport has great support. Friendly people to talk to.

RotaryEvolution

iTrader: (30)

i'll take the high road here and correct this, corksport uses outsourced parts from probably the same country of origin that godspeed does. they're both cheap knockoffs that were commissioned to be made cheaply.

on the other hand, godspeed afaik is a paying vendor here where corksport is not.

i'm installing a knockoff M spec kit for an FD right now, it has some minor parts missing, brackets too short, mount tabs welded to the core in locations that do not bolt up so they're worthless, no instructions whatsoever, etc, etc, etc. so with any aftermarket knockoff you always wind up taking extra effort and time making it work for the few extra saved bucks. i'm sure they both will work and both will require modifications to an extent in one way or another. at any rate i'm irritated because i'm not charging more to mount this shitty kit. oh yes, it also had a hole punched into the core from poor packaging/handling from the chinese builders. i'm going to start charging additional for installing these knockoffs from now on, which in the end would probably cost about the same as a real name brand kit installed.

sharingan 19

iTrader: (16)

Vendor fees (and we all know that isn't the mark of quality) aside, I would go w/ the Corksport kit because the pipe routing is superior to even a real Greddy kit insofar as that it is shorter and allows you to keep your fog lights.

Personally I have never had a problem with corksport products and the few supposed problem posts I have seen were people either ordering the wrong part or not knowing how to install them.

raksj04

iTrader: (1)

I wish they had a replacement hose to the TB with the kit, a nice silicone one

gameover2145

iTrader: (1)

One of the things that bugs me about the Corksport kit is the retention of the factory turbo discharge pipe, throttle body elbow, and coupler. The Greddy style compression tube is a much better design and will keep intake velocity much higher through that portion of the intake path. Both kits will have increased pressure drop versus the stock TMIC, but if you look at the Godspeed/Greddy piping, you'll notice the bends are smooth and not tightly radiused. The factory TB inlet/coupler combination used in the Corksport kit is just not a good piping path and while it is easily understood why it was used for the TMIC, you should most definitely get rid of it with a FMIC kit. Why do you think Greddy did?

The Corksport kit may have slightly shorter pipe runs (considering both plumb to the front bumper so they can't be that drastically different), but honestly the difference in response time will not be noticeable and its not worth worrying about.

Keep in mind, the Godspeed kit is a knock off of the Greddy kit. Yes, while it is a knock off, it still copies their design. If we were to compare the Greddy kit and the Corksport kit, the Greddy kit would win every time. I'm very sure that Greddy put much more R&D and engineering development into their intercooler kit than Corksport did into theirs. Honestly, IMO it looks like Corksport just tried to put together a cheap to produce intercooler kit so they could profit from the fact that there aren't many FC FMIC kits available. I'm not impressed.

If we take into account that the Greddy kit is superior to the Corksport kit, then the Godspeed should be too. The biggest knock to the Godspeed kit is the intercooler core. Although I'm sure it isn't Greddy, HKS, or Spearco quality, it hasn't been proven to be complete crap either. And as Karack noted I'm sure the Corksport core isn't much if any better than the Godspeed. The pipe routing and design of the kit is pretty good (coming from Greddy), so the only real issue is the core.

To remedy the problem of a cheap core, what I plan to do is use a similarly sized core from a reputable intercooler company and put it in the place of the Godspeed. It will be very easy to substitute and there goes that problem.

sharingan 19

iTrader: (16)

Neither kit is perfect. The greddy style tb inlet is definitely better. The shorter and more thoughtful routing of the piping in the corksport kit is better. The core itself seems to be a wash. ideally you could combine the 2 and use a better core but by the time you do that you could have bought an authentic greddy kit.

Personally I didn't care for the compromise so I went v-mount (and used the greddy elbow)

raksj04

iTrader: (1)

^I thought rotary extreme(?) had a v mount kit for about a grand maybe 1200. they where in R&D stages a little bit ago. However I just bought a Bigger/ better rad. Even if it is a Corksport brand. The fact that I have to cut a vent in my hood isn't a selling point for a V-mount. But I have a cheap E-bay CF hood that was rebranded and came with cracks in the resin near one of the bends of the TII style scoop. So I really don't care if I have to cut it other then having to do it in the comfort of the barrack parking lot.

raksj04

iTrader: (1)

wow my english sucks.

Jager

iTrader: (10)

From what I've seen the knock off compression tube is rough, fits terrible, and needs modifications from the start.

What you mean is the actually Greddy compression tube is FTW, not the knock off.

Why is it such a bad piping path? I've used it on previous cars that made plenty fine horsepower. The older HKS kits, RE kits, and the original trust kits used a similar design. So I can't see it as all that bad. Corksport probably just reused it in an attempt to make an affordable intercooler kit.

Agreed. Better choices can be had.

You know the Greddy kit was oversized, fit like ****, and was really the only affordable intercooler kit of its day? People weren't ready to buy a 1200 HKS or search around for months looking for an RE kit (like I had) on Japanese auctions.

Sadly it's a copied design that never improved on a product that wasn't all that great to begin with.

Btw, seems like at least Corksport made their own piping, not copied someone elses kit with an older style core.

Both companies did as you described, ask Godspeed how much time they spent developing a kit? I have no issue in using their parts, but it's all a "named" China part.


Uh. Any tests? Either way, that's assuming that the compression tube doesn't have rough fittings, there isn't as much pressure drop from the Godspeed core compared to the Greddy. You're saying that Greddy and Godspeed are the same because it's the same design?

I don't think either of them are that great. But they are affordable, if you're willing to do as Karack said, you'll get an inexpensive product that with effort, will fit. But when I did my LS1-T56 swap, a lot of things "fit" when you hit them with a hammer or cut something out of the way.

The cores aren't great, but it's an older design where better ones can be had. I agree with you. For most people, it wouldn't matter. My friend runs a CXRacing intercooler into the 700RWHP mark and another more, funny enough, the one with more on his turbo'd LSX had some major pressure drop and had to send back 3 cores due to leaks. Not saying all of the cores will have that effect, but something to consider when you're buying a $350 intercooler kit, then spending another couple hundred on a better core.

Look above.

My point is. I don't see how either of them are a fantastic product, but it all depends on how much you have to spend and what you're willing to do. I prefer doing things the custom route now due to most things don't "fit" what I have in mind. I'll still use eBay intercoolers and such, but why get the poor fitment knock off of an already poor fitting kit?

Corksport I never have seen anyone use, but I agree with all that Karack had to say.

Jager

iTrader: (10)

FYI, V-mount for sale by a slick_willy in the for sale section.

gameover2145

iTrader: (1)

Using the stock TB inlet and an 90* coupler creates a tightly radiused 180* bend. This is bad for pressure drop and intake velocity. I think the old kits used it because it was easy and 'bolt on', bot because it was a good design.

The Greddy kit is ~1200 these days, so I wouldn't necessarily call it affordable. The problem with creating any kind of kit like this is that it is hard to make it a great fit for every car, I've not really heard of to many issues with the real Greddy kit.


I'd rather have copied piping with a decent design than original piping with a bad design.

I'm not saying the same, I'm saying similar. Rough fittings on the compression tube can be fixed.

I agree with what you are saying. I was not trying to say that the Godspeed kit is a great kit by an stretch of the imagination. When you pay $350 for a knock-off intercooler kit, there are obviously going to be some problems, but nothing that can't be fixed. From my experience, whenever you buy aftermarket 'kits' there are going to be some problems when installing, regardless of name brand or knock off. The knock off will typically have more problems though.

The custom route is without a doubt the best way to go. However, it seems like a lot of hassle to either tow my car to a shop that can build one or rig the car up to drive without an intercooler to get there.

HoustonMS3

Has anyone tried the "Greddy Style" copy kit that the RX7Store.net sells? I'm not sure if it has all the same dimensions as the original article (although I have been assuming it does).

Jager

iTrader: (10)

Your opinion, the older designs I liked more anyways. Only making one cut on the car, not having to remove your battery or tweak it to fit. Didn't have to modify or remove the bumper support. Could easily keep PS/AC (if you're gay like that). No one ever ran out of intercooler either. 87GTR ran 10's on an old Trust style. But I guess the stock 90* and TB inlet held him back.


I nearly bought one for $799, I scored an RE with a BOV for $450 shipped.

Funny enough, the RE fit fit near perfect . Didn't have to remove the bumper support for a 4" core either.

You need to install the Greddy kit to understand. You have to remove ****, make multiple cuts and tweaks, a lot of people had an issue without the underbelly pan with overheating. Hit the brake master cylinder, had to work with a smaller battery or relocate it anyways. Shitty couplers, for around $1,000, I expected more.

At least you could make horsepower with it?


Again, a shitty fitting design which you have to tweak, recut, and mess with anyways. My friend on the forum just went through it. Could of just made your own with that time .


Banzai Racing threw his into the scrap pile? It can be fixed, but rough on the interior, poor fitment, another bunch of times tweaking. But that's if you mind that sort of thing.


I think the only perk to supporting a knock off part is if they support our forum. Other then that, I rather keep companies like Greddy around. Ironically, I use an NPR intercooler . Before that, an RE.

So you'll spend a few hours or a weekend trying to make knock off kit fit, instead of just buying a $100 intercooler and $100 worth of piping, (Add another chunk for a Greddy compression tube), to make one fit "right"?

Sounds like you're doing a lot of the custom work regardless.

Driving without an intercooler isn't a big deal, or oh my gosh, leave the stock one on?

Either way, justify whatever means you need to buy the product or not. It's up to you, I just don't get how one cheap kit is so much better then yet another cheap kit. In the end buy whatever you want and whatever you can afford.

tuscanidream

iTrader: (6)

Rotary Extreme just opened a group buy here on his 100% complete vmount kit for the FC. While it costs more money, his asking price is a good deal for an ultimate setup. I wish it was out when I was had the same "greddy, freddy or corksport" thread and I listened to someone's "**** it, vmount or nothing" comment...lol My custom vmount came out nice, but definitely wasn't as cheap as the Rotary Extreme kit.

raksj04

iTrader: (1)

I am just in the research phase now. I have a Rtek and I want to bump the boost up a little maybe 12-13. I was told that is to much for the stock top mount. I may just build my own. I thought of the idea of making a angled top mount. unsure if it has been done be for but I firgue why not. only think stopping me is lacking my welder and my old steel hood. I am not to worried on how my car looks as long as it works.

Jager

iTrader: (10)

Remember, with a top mount it's not the size or anything like that.

It's the location. Check out AaronCake's write up using a TMIC for a FMIC.

raksj04

iTrader: (1)

Basicly it would be a front mount with a heat sheild between the intercooler and engine, with a hood scoop that flows thru. so it would be mounted on top but setup like a front mount. I may even ran an e-fan. I would as put vents in the hood to help lower the under hood temps and try to reduce heat sink.

88rxn/a

iTrader: (6)

whats the max LBS. of boost or even HP through the top mount in its stock location again?

tuscanidream

iTrader: (6)

Duct work and insulation would be key. Just be prepared for the costs associated with such custom jobs.

88rxn/a

iTrader: (6)

never mind...
https://www.rx7club.com/showpost.php...8&postcount=29