Does anyone have a suggestion for a cold air intake system for my 1989 Corvette? I can't find crap online! I'm looking for something from the throttle body forward! Thanks Tim

 

Ran a cold air "scoop" type intake on my '88; not sure it helped any.

Now I run a cut open air box w/ K&N on the '88 & '89 with good results.

A free mod is to remove the "frisbee" from the front of the water pump pulley.

 

Hello, I made a cold air intake myself from left over parts from my 2005 Honda Civic. It fit good but I used duct tape to hold it to the mass air sensor. I could not fund a cold air intake for my 1987 Corvette. You could try flexible dryer vent hose too that is three inch diameter. I saw some flexible plastic hose three inch that was very !ow cost on EBay. I noticed a power gain using this on my car and I rebuild the engine recently with dual exhaust no catalyst. I have Ltd1 heads too and transmission shift kit.

 

How did you notice this? SOTP dyno or a chassis dyno? If it was in conjunction with a fresh motor with the exhaust and catalyst removal how did you eliminate the effect of those? Put simply, how did you measire the power gain from the air intake change from stock to whatever you have? Most gains I have heard of with nothing but a cold air intake change ONLY has been the marvelous SOTP dyno.

 

Hello, I dont have a dyno but this did improve the horse power a little on my car with the fresh engine rebuild and the other modifications

 

How did you know that the other modifications weren't the cause of what you feel?

 

Dont waste money buying one and dont waste time cobbling something together either... its not worth the effort and the only reason youll THINK you gained any power might be because it sounds a little different...

 

Don't waste money on it. Found it used.

I have the old SLP intake system on my 88, it makes a cool sucking sound, it doesn't do **** for power.

 

Hello, I rebuilt the motor then I added the cold air intake later. The expense to doing this was nothing because I used old parts from my sold Honda Civic. The power gains are not much perhaps a 1/10 or more faster or about 5 horsepower or more. My air cleaner was falling apart on my car so I used the cold air intake off of my Honda and it had just the right bends to work properly. My cold air intake has a turbonator filter that looks like a turbo and spins with the engine when running. The pipe is chrome too so it dresses up the engine too. You need a 3 inch flexible pipe clamps and an air filter which you could buy on EBay for a few dollars. Im sure if K&N sold this it would cost a lot of money. It did make a difference on my car but it has other modifications. My motor had been rebuilt by the other owner and he used dome pistons and a 400 small block crank too bringing the engine to a 383 motor. He used to race the car down a Moroso in West Palm Beach,Fla and it was running in the 10 second times in the 1/4 mile. I dont race it but its the fastest car I ever owned. Some cars may have different results but it made a difference on my car. Thats all I can tell you about my home made cold air intake. They dont sale them online to fit the C4 as far as I know. Thanks and have a nice day!

 

run forrest run!

 

Assuming that you DID get 5 HP, and I stress strongly on the word "assuming", I would bet money that most, if not all can't tell that little a difference except in the mind.

If the turbonator ever comes apart, you will be rebuilding the motor. At best, I suspect it is a zero gain thing. At mid level, it might hinder the air flow. At worst, well, a rebuild.

I'm sure it would be since they would have to stand behind it when the motor is broken.

They would have to be able to show it flows more air and with the restrictions from the turbonator, it may be an impossible thing.

 

Hello, My car has a little better throat?e responce when taking off but your right there is no big gain in power. It looks nice when you open the hood and see the chrome air intake with the turbonator air filter. If it would break like what you were telling me it would hit the mass air sensor before it would go through the engines throttle body. It might not cost much but its not too cheaply made. I used this on my 2005 Honda Civic for a long time and it never broke.Anything can go wrong though its the chance you take with modifications. It didn't change my gas mileage using this cold air intake. This Corvette I own was used for racing but was street driven too. I knew the man that owned the car. He had full race headers on the CA with exhaust cut outs and 4.56 rear gears and full race cam in the motor. He defined it when he so!d it to me..He had edelbrock heads,full race cam and 4.56 rear gears. It no longer has that stuff on it but still runs strong. The rear gears now are 2.19 with Ltd1 heads that were given to me and the stock roller lifter cam. Thanks for the reply!

 

Now go out and put a good used stock intake system back on it to match that 2:19 rear gear set....

 

????????

 

Hello. I wish all Corvette Forum Members a Happy New Year! Remember Corvettes Rule!
I did some of my own tests with the stock air cleaner and my cold air intake on my 1987 Corvette and I picked up 3 tenths of a second from 0 to 60 in acceleration. I made 3 tests and got the same results each time.

 

Happy New year's Craig!.... Been reading your post,...if you like your cold air intake, then so be it!... I kinda get off on things I make and do to my Vette, or truck,....the guys on here are ruff,... they'll give you hell for things they think they know more about than you....I once had a "lesson gave to me" about exhaust back pressure......and the fact that my *** couldn't tell a difference in the added power my new to me exaust system with mufflers gave my car....
But....in the process,..somebody will come along, and give you helpfully tips on how to get things done on these C4's....
HAPPY NEW YEAR TOO EVERYBODY....2020 REALLY SUCKED!...

 

Yep, the stock airbox flows quite fine.

My Callaway Supernatural has the original stock air intake, and the lid is not cut open either. If it's good enough for a Callaway it's good enough for the rest.

 

Thats exactly what were trying to do!!!! Were not giving him hell as you say... were telling him whats worked for thousands of cars before him and what to avoid. Its very obvious that Craig is new to Corvettes and coming from the import world I can understand that. But installing a home made air intake, with a gimmicky device on it that is still drawing hot air into it from under the hood is honestly hurting his performance rather than helping it. The stock unit would no doubt be better for his application perhaps with a cut lid as described by someone above. As a bonus, it will probably also be better for actual air filtration. Many times there are people who do know better about something than me... I try to listen and take their advice which is what Craig should do in this case.

 

Yep and i tend to agree with this, apart from lid cutting, it'll do stuff all.

Installing a part designed for a totally different car in a hodge podge configuration is almost never a good idea, and if that is what someone is doing thinking it is perfectly ok, then they really should be told it isn't. If they feel that being told is causing them some offence, that's tough luck, they are not being told because anyone is pushing ill will, they're being told because it makes no sense to watch someone do something that could compromise the reliability of their vehicle for no gain at all and not say something about it.

The cut lid and bigger more open filters sounds good in theory, but if the stock lid flows enough for over 425 horse, there is no need to cut it.

All these so called intake mods will do hardly anything for modded engines, and will do even less if it is close to stock.

 

So I assume the LT1 heads are first Gen ??