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Fast 92 install

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Old Sep 18, 2016 | 09:28 PM
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Default Fast 92 install

just picked up a fast 92 for our c5. I have a ls2 TB as well. Was going to get the TB ported, need to get the bolts for the valley cover, and the harness for the TB. Anything else I will need for the install??
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Old Sep 18, 2016 | 10:14 PM
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Originally Posted by slow-v6
just picked up a fast 92 for our c5. I have a ls2 TB as well. Was going to get the TB ported, need to get the bolts for the valley cover, and the harness for the TB. Anything else I will need for the install??
you also ether have to modify the steam lines if the vette is pre 2002. this can be a bit complicated. Bill Curlee used a front steam line for the rear which is a cheaper way to go. Some eliminate the rear lines and plug them, I don't like that setup because it traps air in the head and makes the filling of the radiator a pain. I would install and relocate the oil pressure sender while you have the intake off. Here is the steam line setup I used it is more expensive but it was what I liked.
https://www.summitracing.com/parts/t...0600/overview/
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Old Sep 18, 2016 | 11:11 PM
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Thanks for the heads up. I am not sure if this will apply to my car since it has a ls2 402 motor in it. Will find out when the intake comes off I guess!! Lol
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Old Sep 19, 2016 | 12:26 AM
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Originally Posted by slow-v6
just picked up a fast 92 for our c5. I have a ls2 TB as well. Was going to get the TB ported, need to get the bolts for the valley cover, and the harness for the TB. Anything else I will need for the install??
http://www.racetronix.biz/itemdesc.a...2-MSEH&eq=&Tp=

As to TB porting, it's difficult for me to express how much I HIGHLY recommend Pete's work. I chose to send him my (then new) LS2 TB and his turnaround time is quite good. I have personal experience with his work and consider him the Tony Mamo of TB porting.

http://vmaxmotorsports.com/

HTH
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Old Sep 19, 2016 | 12:35 AM
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Btw, be prepared to deal with possible firewall interference issues. I went with modified (lowered .390") motor mount brackets, but some choose the short urethane mount solution. Another method of lowering the engine for clearance is the Lingenfelter cradle shim kit designed specifically for this issue. Simple, inexpensive, and effective but it's only .250" however.
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Old Sep 19, 2016 | 08:29 AM
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Originally Posted by LoneStarFRC
Btw, be prepared to deal with possible firewall interference issues. I went with modified (lowered .390") motor mount brackets, but some choose the short urethane mount solution. Another method of lowering the engine for clearance is the Lingenfelter cradle shim kit designed specifically for this issue. Simple, inexpensive, and effective but it's only .250" however.
with a 92 fast clearance problems or a 102?
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Old Sep 19, 2016 | 02:50 PM
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Originally Posted by feeder82
with a 92 fast clearance problems or a 102?
I dealt with this minor issue using a 102, can't say for certain with a 92, but that's why I said "be prepared". Just in case.
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Old Sep 19, 2016 | 07:58 PM
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Originally Posted by LoneStarFRC
I dealt with this minor issue using a 102, can't say for certain with a 92, but that's why I said "be prepared". Just in case.
a 92 was going to be my next mod, I knew about the 102 fitment issue had to check I'm 99%sure the 92 doesn't have that problem
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Old Sep 19, 2016 | 08:26 PM
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If you're using a LS2 TB doesn't have the coolant passages so you'll need a piece to bypass the lines. I found a 1/4" fuel hose coupler to do the trick.

Also, you may want to mount the MAP sensor remotely by tapping the hole to fit a 1/4" NPT pipe fitting and running a small amount of 1/4" fuel line from it to the MAP sensor. I personally have some fitment issues with the MAP sensor and the firewall, although I'm on urethane motor mounts so that may be the issue.
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Old Sep 19, 2016 | 08:31 PM
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Originally Posted by feeder82
a 92 was going to be my next mod, I knew about the 102 fitment issue had to check I'm 99%sure the 92 doesn't have that problem
You could well be correct.

As far as the 102 is concerned, the clearance issue seems to show up in varying degrees. IOW, some people have it worse than others. "Tolerance/manufacturing stacking" is the only thing I can think of that would make sense as to why.

Having said all that though, my current manifold efforts are involving the fairly new MSD manifold (with some Tony Mamo porting handiwork), so it's going to be a real learning experience, as the LS7 manifold was designed by MSD for use in a C6. I'll be finding out how it goes soon.
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Old Sep 19, 2016 | 08:49 PM
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Originally Posted by onspeed
If you're using a LS2 TB doesn't have the coolant passages so you'll need a piece to bypass the lines. I found a 1/4" fuel hose coupler to do the trick.

Also, you may want to mount the MAP sensor remotely by tapping the hole to fit a 1/4" NPT pipe fitting and running a small amount of 1/4" fuel line from it to the MAP sensor. I personally have some fitment issues with the MAP sensor and the firewall, although I'm on urethane motor mounts so that may be the issue.
Dealing with the vapor/steam line issue can be done several ways. Some guys have even run two SS braided lines front-to-back, one line on each side of the manifold with a tee in front going to the rad. Here's some fittings from one company. There are others.

http://www.ictbillet.com/ls1-1-8-coo...s1-lsx-ls.html
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Old Sep 22, 2016 | 11:46 PM
  #12  
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Thanks for the input everyone.. I did a fast 90 on my old c5 and it went on very easy. Hopi g the 92 will do the same.
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Old Sep 24, 2016 | 11:58 AM
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Originally Posted by LoneStarFRC
http://www.racetronix.biz/itemdesc.a...2-MSEH&eq=&Tp=

As to TB porting, it's difficult for me to express how much I HIGHLY recommend Pete's work. I chose to send him my (then new) LS2 TB and his turnaround time is quite good. I have personal experience with his work and consider him the Tony Mamo of TB porting.

http://vmaxmotorsports.com/

HTH
Ditto for Pete. Only one for me.
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Old Sep 24, 2016 | 02:00 PM
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Originally Posted by wvufan1965
Ditto for Pete. Only one for me.
Pete's background and credentials are equally as impressive as his porting skill. Years of experience in the field of engine airflow management, including working with the GM team on the development of the composite LS intake manifolds. Plus, he's just a genuinely nice guy too.
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