the OTHER Supra Site
 

Hi Folks,

I have joined Supramania and have been reading their posts. Over there, they act like if you don't have a turbo, you don't really have a Supra. My '89 is NA and seems plenty fast. I've gotten it up to 140 mph on the highway. Plus, the engine compartment is cramped with enough stuff as it is. I've seen turbos and I would hate to work around all that plumbing. I've never driven a turbo. Is there that much of a difference? In 1989 Motor Trend did a "Top Ten Shootout" of the fastest cars for that year, and they got the Turbo Supra up to 146 mph max. I've come pretty close to that in my NA. Is the difference in the lower ratio's? Anyway, I'm very happy with my car and I love these boards so I think I'll stick around here, If you all don't mind. It seems a lot less snooty here at home.

Sincerely,

Scruffboy

i hate people like that. i also have a N/A which is pretty fast considering the mods that i've done to it

Question for Supra91
 

Hey,

I see in your profile you installed a header. Do NA's have a separate downpipe? I installed a Magnaflo Cat with 2 1/2" openings as I was contemplating an exhaust upgrade. Are you happy with the way yours turned out? Is it a really noticable difference? What did you replace the resonator with? I was thinking of using one of those "glass packs" and then the muffler, using 2 1/2 inch piping. Any input you have would be appreciated.

Thanks,

Scruffboy

top speed is way different than horsepower

so you juice a supra up to 400 - 500 hp , this doesn't mean that you will gain top speed .
it means you will get to the top speed faster .
i recently had to put the stock exhaust back onto my supra for emissions testing. While driving it around for a little while like this i decided it's NO FUN .
no boost + no exhaust = boring yet very smooth ride ..
i'm good to go for 2 years now . i think i only have to pass emissions 2 more times and then the car will be a classic in my state and the testing is over

i installed the header which comes with an extension pipe that connects to the cat. you can notice a difference and it made the exhaust note deeper. i have a full 2 1/2" exhaust with a test pipe, no resonator, and a muffler. although, you have to make some modifications the new O2 sensor mounting place because i'm having gas mileage problems but as soon as i fix it i'll let you know and tell you how it's working

how often do they check for emissions? i live in Illinois

Top speed of a stock Supra is limited by drag, not gearing. The more horsepower you have the faster you will acheive your top speed and your top speed will be increased. Increasing your top speed is a matter of overpowering the drag. A 500hp car will destroy a stock car in all catergorys.
Top speed is determined by horsepower, gearing, and drag.

For Supra91
 

Is there a mount for the O2 sensor on your header? I just installed a new sensor to pass emissions here in NJ. They test you every 2 years. I see you live in Conneticut, or as the truckers say, the Communist state. Jersey is pretty much the same. Are you saying that you have to reinstall the stock manifold just to pass inspection, or is it that you can't get your emissions down enough with your set-up? I would definitely not want to reinstall the manifold every 2 years, no f-in way. Anyway, my water pump just crapped out on me and my baby's in the shop right now. After that, I need to replace the valve cover gaskets. So it will be a while before I seriously contemplate the exhaust upgrade. I really appreciate all the input you can give me Supra91, thanks a lot.

James in NJ

Ooopppsss
 

Sorry Supra91, I see it is kwnate who lives in Conneticut. My bad.

Actually I live in Washington State....

Sorry!
 

Screwed up again, it was ddmcse who lives in CT. I knew someone on this thread was from there. Anyway, if you install the header on an NA, is there a mount for the O2 sensor. Supra91 mentioned something about making adjustments or something to that nature. Now that I think about it, I can't even remember exactly where I installed the sensor. Was it directly on the manifold, or behind it on the block. I did it in the dark with a dull droplight. I think it was the manifold, so a header would have to have mount, wouldn't it.


Scruff