best cold/ram air intake
best cold/ram air intake
I know you guys are gonna hate this thread but I have to ask which cold/ram air kit is the best. Usually I would leave BS mods like this alone on a basically stock vehicle, but my car has a built 350 w/ hot cam and looks to be still breathing through the stock tube! I think there is some power to be gained (not lost) with a new intake.
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
I have the same car that you do and the stock Firebird intake system leaves something to be desired. I had the SLP cold air system but it basically uses the same hose and filter as the stock unit. The hose off of the throttle body to the MAF is more than 90 degrees if you look at it carefully.
I made one myself and I wish I had a picture of it. I used the LTI air inlet elbow from Summit Racing in place of the first hose. I managed to get a 4 inch hose from work and cut it to the right length so it would fit from the Throttle body to the LT1 elbow. The LT1 elbow has a 3.5" outlet to the MAF. I got a piece of 3.5" plastic pipe and made an adaptor that converted the Bosch MAF to 3.5" and tapered the insides so that there is a smooth transition. I did this at both ends of the MAF.
I had to make a bracket out of 1/8"X 1" aluminum bar stock in order to relocate the MAF to the right about 3" while still using the stock MAF bracket. I also relocated the radiator overflow hose to the side of the filler neck. This opened up a lot of room to get my 3 1/2" pipe by.
By the way I had already relocated the charcoal canister to over by the battery. This was done when I installed the SLP cold air kit. The stock air filter assembly was already gone with the SLP cold air kit installation.
Now from the MAF to the new K&N air filter I installed a length of 3 1/2 mandrel bent exhaust tubing that was bent about 45 degrees. I picked a K&N air filter that was about 25% larger than needed according to their charts.
If you go by the K&N charts the stock Firebird airfilter is too small for a 350 after 5400RPM. Choke time here. This is where I'am at now and I can guarantee that the MAF is the only restriction in my cold air intake system. I have taken the screens out and it flows well past 700CFM according to tests I have seen. This is enough to make a lot of horsepower.
I'am now in the process of making big modifications to the old SLP air box so that there is a barrier between the engine compartment and hood and where the airfilter is. By the way the only 90 degree is the LT1 intake elbow and it flows bigtime. The other turn is the 45 degree 3 1/2 inch pipe. We are talking free flowing here.
Wish I had pictures for you. It saves a 1000 words.
Allen
I made one myself and I wish I had a picture of it. I used the LTI air inlet elbow from Summit Racing in place of the first hose. I managed to get a 4 inch hose from work and cut it to the right length so it would fit from the Throttle body to the LT1 elbow. The LT1 elbow has a 3.5" outlet to the MAF. I got a piece of 3.5" plastic pipe and made an adaptor that converted the Bosch MAF to 3.5" and tapered the insides so that there is a smooth transition. I did this at both ends of the MAF.
I had to make a bracket out of 1/8"X 1" aluminum bar stock in order to relocate the MAF to the right about 3" while still using the stock MAF bracket. I also relocated the radiator overflow hose to the side of the filler neck. This opened up a lot of room to get my 3 1/2" pipe by.
By the way I had already relocated the charcoal canister to over by the battery. This was done when I installed the SLP cold air kit. The stock air filter assembly was already gone with the SLP cold air kit installation.
Now from the MAF to the new K&N air filter I installed a length of 3 1/2 mandrel bent exhaust tubing that was bent about 45 degrees. I picked a K&N air filter that was about 25% larger than needed according to their charts.
If you go by the K&N charts the stock Firebird airfilter is too small for a 350 after 5400RPM. Choke time here. This is where I'am at now and I can guarantee that the MAF is the only restriction in my cold air intake system. I have taken the screens out and it flows well past 700CFM according to tests I have seen. This is enough to make a lot of horsepower.
I'am now in the process of making big modifications to the old SLP air box so that there is a barrier between the engine compartment and hood and where the airfilter is. By the way the only 90 degree is the LT1 intake elbow and it flows bigtime. The other turn is the 45 degree 3 1/2 inch pipe. We are talking free flowing here.
Wish I had pictures for you. It saves a 1000 words.
Allen Last edited by 1989GTATransAm; Aug 2, 2004 at 09:27 PM.
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
semi-idealy, I would run some tubing to the rear of the hood area and feed it off of a cowl induction, although, that may look kind of goofy.
Thanks for the involved write-up. I checked out the SLP cold air kit, and it looks to be exactly what is in my car
They really made it look like it's OEM. I just got this car and I'm not 100% on everything that has been done to it, so sorry for the stupidity. I guess that's another $240 I won't have to spend.
They really made it look like it's OEM. I just got this car and I'm not 100% on everything that has been done to it, so sorry for the stupidity. I guess that's another $240 I won't have to spend. Senior Member
Joined: Jan 2006
Posts: 793
Likes: 0
From: Michigan
Car: 1987 Trans Am
Engine: 5.0L TPI
Transmission: 700R4
Axle/Gears: Richmond 3.73
I have the SLP, and I like it alot. And if you look at the 90's that the SLP comes with, is does have some bent metal to help the air along. Not only at the elbow where it turns toward the left. Also where it hooks up to the air box. Where it elbows going down. So its not that big of a restriction. Plus it opes up the air for the fender. Not trying to suck all that air from that little can.
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