I am trying to install a fast 90 on my 02z and am having a few problems. First off, the vacuum hose to the a/c seems to be to short and wont reach the nipple on the intake. Do I have to extend it or just reposition it? Second, the intake seems to be hitting the valley cover bolts. I already have the fast valley cover bolts and I thought that was the only thing i needed to do to make it fit. should i just try to tighten it down and hope it doesnt crack or is there something else i need to do? I NEED HELP!!!

 

I didn't have to extend any hoses when I put it on my 02Z - try repositioning the line. As for the bolts you should be fine if you used the ones supplied by FAST. Might want to check and make sure the bottom of the intake near the front isn't hitting the small metal coolant tube. I had that happen on my '99 Trans Am and just tapped it down about 1/4" or so with a hammer. Can't remember if I had to do it on the vette or not.

 

I extended the vacuum line and included a few 90 degree fittings. Now it reaches very easily and I can connect/disconnect it without removing anything.

If you are using the stock GM gaskets, that may be an issue as they are very soft.

 

It looks like the front if the intake is hitting the front bolt on the drivers side but it us really hard to tell. There is prolly an 1/8" gap between the head and the intake Im not sure if it will crack when I tighten it down.

The while a/c vacuum line really isn't that big of a deal, I just haven't ever heard of anyone having that problem and didn't know if I was doing something wrong.

 

Real easy way to verify if it's that bolt or not - just take the bolt out and see if the manifold will drop down into position. If it does then obviously the bolt is the problem. When mine wasn't sitting all the way down it was very obvious (to me at least) that it wasn't making contact with the heads completely. It just felt like it was hitting metal up near the throttle body and the gap b/w the intake and head was also pretty small - like 1/8" at most.

 

You also need to reshape the front cross-over tube or the intake will hit that. A rubber hammer can be used to gently re-shape it down and clear.

Here is my vacuum line, it drops right into place. Of course in this photo the intake is still forward some. Also, when you set in place you need to lift the rear during the final few inches to clear the rear sensors in the block.

 

It was hitting the coolant crossover pipe. I got everything installed and tuned last night. It picked up 13hp 15ft/lbs on my h/c car. Thanks for all the help.

 

Glad you figured it out. Sounds like some good gains too. Was that a stock or ported 90/90?

 

I bought it used and it is supposed to be ported by tony mamo. Everyone else seems to claim 20-25 hp gains with his intakes so who knows. Im a little disappointed but it is what it is.

 

I am not sure what tube you are talking about here. Are you talking about that coolant tube?

Did anyone have problems with the amount of space behind the FAST intake? I am really having an issue with the PCV tube set that goes behind the intake manifold and getting it far enough back to bolt it in. Any tips would be appreciated. Thanks.

 

That photo is how I extended the vacuum line for the A/C. It is fit exactly to the manifold position and easy to install/remove.

As for the PCV tube, you need to remove the tube from the Y fitting behind the intake over to the driver's side valve cover. Then get hose and lengthen so you can tuck it back farther. I had the same issue. I have photos if you need them.

 

Ok, I got what you are saying. I did something similar with the A/C vacuum line.

The PCV I would love to see the shots of how you lengthen it and moved it back. Thanks!

 

Here is the PCV hose disassembled between the "Y" connector and the driver's side valve cover.




Here you can see the new rubber hose that replaced the foam covered hard line of the OEM connection. I made it long enough to tuck out of the way. I have since gone to the late 04 valley cover and eliminated all of this.

 

If you take some pics of the bottom of the intake where the ports are I can tell you if Mamo ported it. I just bought one and sent Tony pics just to be sure that he was pretty positive that it was HIS work. You should see 25+ RWHP on one of his intakes over the LS1 intake (w/ a LS2 TB and retune also).

Go to a LS6 PCV system (under $100) and it will take out the stock pcv system.

 

And you wouldn't have been the first guy to buy a used intake I supposedly ported and did not (unfortunately).

Not saying thats the case (or not) here but I encourage anyone looking at a used intake I supposedly ported to get with me before they purchase.

In most instances I would know the potential seller or if that doesn't work I could easily verify whether I did do the work if you were to send me a few pics of the port exits which are unique and easy for me to verify whether in fact it was my handiwork you are technically partially paying for when you buy a used intake.

I have saved a handful of people from getting ripped off already (verifying the work in fact wasn't mine) and helped others to confirm that it was such as the case with Don here.

Like I said....any of you finding yourself in a similar situation, please feel free to PM me so I can help you confirm what your potentially purchasing. You can actually hurt the performance of one of these intakes with improper porting and if you dont have an eye to tell its buyer beware and a dice roll concerning your performance results.

Thanks,
Tony

PS.....Obviously Nate's dyno increases dont reflect the typical gains most of my customers see (as he was aware) but there are always variables in dyno testing so even that isn't a very conclusive situation.

 

Tony and Nate, let me chime in here. Rest assured the FAST intake I sold to Nate IS ported by Tony. Tony can verify for you by you giving him my name. I stand by that! There MUST be other variables like Tony said as to why your not seeing more of a gain.

 

^Dont know why I put "I" can tell you, I meant to take pics and send them to Tony, anyways I will have a good after result when I get my car tuned on the same dyno from when I put down 440. All I am adding is a Mamo 90, Ported LS2 TB and a re-tune. Should have results late next month.

 

Dont get me wrong, I wasnt trying to say I got ripped off. I know the are many factors the effect hp gains. Im really happy with the intake and I feel like I got a good deal on it. It was shipped VERY quickly and looked exactly as described in the for sale thread. I feel a 13hp gain over a "ported" ls6 intake is acceptable and the car feels great.

Thanks again for the intake and to everyone including Tony for all the help. Every thread I have started or read about porting, intakes or throttle bodies Tony has been there offer great advice, even giving away tricks and secrets at times. Its people like him and you all that take the time to help each other out that makes this forum such a success.

 

Curious if you noticed the motor is noticeably louder? I found the FAST lets a lot more internal motor noise come through.

 

^I have heard the same thing, hopefully mine does not get worse as I already have a lot of noise with the LS6 intake!