Tuned Performance

iTrader: (92)

You might want to ask the seller if he has that piece.

irocrocks1234

irocrocks1234

found this on a thread in the forum...

Tuned Performance

iTrader: (92)

https://www.thirdgen.org/forums/engi...st-spacer.html
Nice find, I hope you can locate this part without to much trouble.
Sounds like you have a lot missing to complete the air system.

irocrocks1234

yes I do... not to mention the wiring too.... wish some people would do things right and not half a$$ it. Again thank you so much for the help. This restore is gonna take awhile.. after engine and it' compartment are done I move to tranny then wires then rust removal then exterior and finally interior.

Ty92Z

iTrader: (11)

I have a 92 Z28 with an LB9 that I am removing to replace with an L98. I am removing all the AIR components which are complete and in working order. Not sure how different if at all this is from the 86 system, but if interested let me know.

irocrocks1234

well I do have an 86 z28 with the IROC packge but my engine is a 1990 5.0 tpi... so I would think it would work.. I will check and see. I mean it has headers on it now... but wanting to get all smog equipment... Do you have a pic or pics? How much you want for it,if it is compatible?

Tuned Performance

iTrader: (92)

The manifolds might work. But the air pump mounts differently on the serpentine belt setup vs v belt.

Ty92Z

iTrader: (11)

It’s still on the car, but I can get some pics to you by tomorrow. Shipping would run about $50 to ship everything out to AZ. Manifolds with tubes, pump, all the other odds and ends? How’s $150 to your door?

irocrocks1234

thanks.... I got my air pump yesterday.

Ty92Z

iTrader: (11)

Ok. I was thinking you needed the whole shebang.

irocrocks1234

pulled valve cover off drivers side head hear is what I found..... Driver side head
On front of block behind power steering pump do you know what the numbers 638 mean

Tuned Performance

iTrader: (92)

Looks like the top end is from the 86 305

irocrocks1234

are those HO heads?. And would that smog system from the other guy fit? Anythin on other pic o sent?

Tuned Performance

iTrader: (92)

They are a ho 305 head used in 85/86. I don’t think the air pump would bolt on its different for 88-92.

irocrocks1234

NICE!!!! More ponies and good fuel econ,right?
as for the air pump I bought it yesterday.. so just need the rest of the stuff... his stock exhaust manifolds should bolt right up..right?

irocrocks1234

what would be all of the other odds and ends and can you send pictures of everything except the air pump and is that $100 for everything plus the $50 shipping or $150 plus the $50 for shipping

Tuned Performance

iTrader: (92)

The manifolds should work. The heads are real similar to 081 heads.

Ty92Z

iTrader: (11)

The other pieces were the AIR diverter valve and the various hoses that connect to the manifolds and AIR pump. $150 to your door means shipping included. How soon would you need the manifolds? If they’re all you need, I’d do $115 shipped.

irocrocks1234

send it ALL except air pump... and 150 title is good for me. Does it have that spacer on the passenger side flange? But like I said send it ALL please

Ty92Z

iTrader: (11)

Don’t know about the spacer as I haven’t looked. If it was there from the factory on the Z28, then it’s there. Car hasn’t been modified beyond regular maintenance items. How soon? I’m a UPS guy so I work very long hours. Can get pics Saturday.

irocrocks1234

first off I would like to let you know that I really appreciate what you do for work UPS guys I got a few friends that are that work for UPS and you guys really bust your butts man so much respect for you. As far as Parts ASAP everything please and how do you want to do the whole pay thing going to do PayPal or how do you want to do it

Tuned Performance

iTrader: (92)

I think they quite doing the spacer later years and the outlet looks like the drivers side.

Ty92Z

iTrader: (11)

Lol, I appreciate your appreciation. Long hours, but I enjoy it. Meet a lot of car guys and have seen many nice and interesting rides. PayPal is fine. I can get some pics Saturday or Sunday after church.

Ty92Z

iTrader: (11)

Thought that too. So he would need a later y pipe to bolt up to the manifolds. Says he currently has headers now so will need a y pipe anyway as I don’t know of a y that fits both manifolds and headers.

Tuned Performance

iTrader: (92)

He might be able to get a exhaust shop to build him a y or if the y he has had the right angle for manifolds flare the pipe and install a flange.

irocrocks1234

I have a Y pipe on it already pipes that they put on this car they rent them from the headers into one pipe and then out the back and into the muffler and then splits out the muffler into to pipes. So, I think I should be able to just weld everything right up to it maybe extend the pipes a little bit but I should be okay I believe we're running the same exact heads right I'm running 416 and I think you're running 416 heads or are you using the 018 heads? But it should be pretty close I would think anyways just looking forward to the pictures and figuring out how you want to do this.

SRKLEGIN

Yes, I have all the smog stuff installed with a extreme street cam in it and it passed emissions. A lot of people frown upon the reinstall of the smog stuff, but I cant get it licensed in Utah unless I have it installed. I am treating the 350 as a 1987 350 TPI (all sensors) All the vacuum lines are set-up for my 305 intake plenum and 48mm throttle body. Once I get this engine settled down as far as the valve train issues, I am going to install a 52mm throttle body by TPIS (TPIS.com) anything larger, throttle body-wise is too big. Tried a 58 and it sounded like a huge vacuum and did a lot of self flooding. Cold starts were an issue as well, so I may take the lower water casing off the 48mm (since I have two set-ups, and modify the 52mm to remedy the situation. I had some issues with the exhaust manifolds as well. I used my 305 exhaust manifolds and slightly ported them to better match. I had full piece Mr. Gasket manifold gaskets and they leaked like crazy, so I got the genuine GM singular exhaust manifold gaskets to get a better seal. You probably should read the info on 305-350 swap very closely and understand, that if you use the stock 4165 OBDI, you will have to get it programed, unless your planning on installing a wire harness that was for the engine your installing. My MAF, IAC, are all for 87 350 TPI

Ty92Z

iTrader: (11)

Later LB9s use 081 heads, but it won’t be a problem to bolt the manifolds to your 416s. These don’t use a spacer and both sides have a 2 bolt flange.



Diverter valve & hoses, passenger exhaust manifold



Driver side exhaust manifold



Driver from bottom



Passenger from bottom

irocrocks1234

very cool.... will try to send you private message

350Z28Z

F stands for the month the next number stands for the day and the last two numbers stands for the year F290

Several pictures up clearly show 5.0L stamped on the back of the block.

By the way in 1986 GM did make 50 1986 TPI 350. They tested them and it did better than the vet. So, they didnt release them to the sold.

irocrocks1234

so Feb. 02 1990

Big&BadGTA

iTrader: (1)

Please tell us what facts you have to back up this claim?

irocrocks1234

replacing valve cover gaskets with 7/32 cork.. have them on and hand tight,but was wondering what the torque would be.... 5flbs? Correction... they are 5/32

irocrocks1234

Does anyone know what shape 416 heads exhaust ports Are? Round,square,oval,D shaped?

Tuned Performance

iTrader: (92)

The ports look like this

irocrocks1234

Perfect,I bought some square gaskets by Mr. Gasket. They are the solid strip,I seen those too but was unsure of them. Anyway now I can remove the headers...thank you again sir.

irocrocks1234

Perfect,I bought some square gaskets by Mr. Gasket. They are the solid strip,I seen those too but was unsure of them. Anyway now I can remove the headers...thank you again sir.
by the way,are rose better?

irocrocks1234

Perfect,I bought some square gaskets by Mr. Gasket. They are the solid strip,I seen those too but was unsure of them. Anyway now I can remove the headers...thank you again sir.
by the way,are those better?..

Tuned Performance

iTrader: (92)

I don’t know what gaskets your comparing. These work great on cast iron manifolds.

irocrocks1234

These are what i got

Tuned Performance

iTrader: (92)

I’ve never used those gaskets. They look like they are good quality.

Tuned Performance

iTrader: (92)

Any progress with getting the car to pass smog ?

irocrocks1234

well we have some progress I got the manifolds on finally they look nice in there I'm missing some pieces for the air system also found a heater hose that's just laying in there somewhere so there's a few more things and I have to take care of and reroute and figure out how they go and right now I'm removing the rear axles because I needed to put new brake hardware on it and backing plates so that's kind of where we're at right now but I did fire it up after I got the manifolds on and it sounds really nice

Ty92Z

iTrader: (11)

What are you missing for the A.I.R. System?

83z28crossfire

irocrocks1234

hey Ty... some hoses I think...

irocrocks1234

has anyone ever used a rethreader kit to clean threads out? Here's my situation I got the differential all cracked open drained out cleaned out got rid of all the sticky black crap in their nasty oil now I'm trying to put the cover back on but I'm having a problem because the ding dongs who had this car before me decided to use black RTV and run the bolts through it and throw them into their holes now that's going to cause a torque issue meaning it's going to give me false torque readings when I go to torque these things back down so I need to clean out the threads I've watched several things on thread Chasers so I went to AutoZone and I got what they call a rethreader kit but I'm wondering if that's actually going to work or not so I'm a little hesitant to put them all the way in to pull the crap out because I don't want to rethread it I just want to clean it

Beater79TA

If you just want to clean the threads, you should be able to use a tap with the same thread pitch as the bolts. It should thread in and clean the rtv. You'll probably need a small vacuum hose of some kind to pull the RTV out as it gets cut loose.

irocrocks1234

My bolt
Rethreader kit
Top of bolt... what does it mean?
not sure what size I need... I've used the ones that seem similar in size to the bolts but again like I stated I'm a little nervous because I don't want to recut threads or damage the threads I have because my bolts will go in just fine I'm just worried about twerking issues that's why I want to clean them out