N/A Cams In My Turbo Eclipse [Archive] - The Toyota Supra Forums

: N/A Cams In My Turbo Eclipse


TRANS03
01-24-2008, 07:01 PM
I've seen on this forum people saying you can gain a little power in the turbo Supra's using n/a cams. Anyone know if this also works on a 91 Eclipse turbo? I could probably go to a DSM forum and ask but I already know most of you guys know what your talking about and I don't really want to start all over again. Anyway, I'm building another :bonk: engine for this #@&* car and already have a nice n/a head ready. Did I mention I'm on the 3rd trans, t-case, and 2nd rear carrier in 20k miles. Oh well, why quit now.

supramacist
01-25-2008, 12:54 AM
1st of all you have never read anywhere on this forum from anyone that knew what they were talking about. Because na cams in a gte decrease the stroke in the 7mgte engine.

So I ask you....., where are the gains in that?

2nd. It's gte cams into the NA engine is what you most likely read.

3rd. If you want advice on your mitsubishi.
Find the appropriate site dude.

Now the polite answer.

In theory you should be able to do the same thing in a mits.
BUT...., I don't know. Because this is a supra forum.

You smell what you've stepped into here yet or what???

TRANS03
01-25-2008, 04:46 PM
Supramacist,
Generally I try to be polite on this forum, but for you I'll make an exception. First, how the hell do cams decrease the stroke of an engine? I haven't yet built a Supra engine, but I have built Chevy's, Olds, Pontiac's, Buick's, Mitsubishi's and Honda's. In none of those were the rods or crank connected to the cam.
2nd, Perhaps in your haste to try to insult someone you missed the "other car" heading of this section. If all you want is questions about Supra's, you should'nt have this section. If you read my question, obviously I know I can go to a different forum. Until your reply, I've gotten usefull info here, and Supra guys seem to be interested in other performance cars as well. BTW, I do own 2 Supra's, but there not the only cars I have or am interested in modifying. As far as where I saw the n/a cam thing, it was here but maybe I mis-read it. Be assured, I will find it again and get back to you.

If anyone else has any REAL suggestions, I would still appreciate your oppinions.

TRANS03
01-25-2008, 05:19 PM
Supramacist, do a forum search using keywords n/a, cams and you will find several threads related to my question. In one, YOU said that you had it "twisted around" and that the n/a cams will help a gte. Now then..... Who stepped in what?

supramacist
01-27-2008, 12:32 PM
It's the gte cams that help the na engine.
regardless of what I said way back when.
If I knew then what I know now. I would have probably kept my money.

It's the gte cams in the na engine.
the cams for the gte engine have a larger stroke which opens the valves in the ge head further, allowing for larger combustion and increased airflow.

I really don't see where I was insulting. You wanted mits advice in a supra forum dude.
Do you think we would go to a porsche forum and discuss our supras' ???
Now...., I lack tact. Anyone around here knows I'm straight to the point.
I'm sorry you took it the way that you did.

But none the less. Do you even have a supra???
HPF has a mits section I am sure. I was just trying to get your shite answered correctly for you.

TRANS03
01-28-2008, 12:47 PM
DUDE! I'm not trying to be a smart-@##, but do you actually read the reply's? Yes, as I stated above, I own 2 Supra's. And I wouldn't expect you to remember every thing you have put on here, but we recently discussed my cold running issue on my n/a 91, for which I recieved numerous helpfull ideas. I still say if you dont want any conversation about other cars, you shouln't have a section titled "other cars"!

So n/a cams will probably hurt the performance of the turbo eng. got-it. Thanks for the info. See.... wasn't that easy?

supramacist
01-28-2008, 01:08 PM
I don't re-read every post every time I post.
I just read the recent posts.
I don't pay attention to too many names.
Because I'm an equal opportunist jerk.
So don't take it personally.

87pupra7mget
02-06-2008, 09:51 PM
ok no disrespect to anyone but the turbo cam should have a high lift and short duration for a quick burst of air into the cylinder and the NA cams have a longer duration and short lift to increase the time the vaulve can stay open simple physics but that is what makes sence... and i havent checked the lift or duration of my new turbo 90 so.... but my 86.5 NA cams are .285 lift and a 264 degree duration intake and .290 lift and 258 duration exaust. so in short NA cams should give you more botom end torque and a smother power than the turbo cams but i reccomend .393 intake .379 exaust lift 272 duration cams from Crower (stage 2) if you really want power. i built a DSM w/ 570 whp at all 4 wheels running 10.90's @ 125 ish mph with those cams on 25lbs on pump gas. you can get them at http://www.crower.com/cat/import/mitsu/cams/camshafts.shtml

TRANS03
02-07-2008, 08:07 PM
Thanks for the input 87, maybe I'll try to find the spec's on the stock n/a and turbo cams just for the heck of it. Not really trying to make anything quite that quick, just figured as I'm building the engine anyway, and already own the n/a cam head, I'd use it if it made any improvement. Bummer about the 86.5 n/a gettin slammed. If nothing else, at least you have some spare parts for the 90.