speedfreak391

iTrader: (2)

Ok, so here goes! I have spent the last couple of years slowly buying the parts that I will need for the build of my 1987 IROC hard top. I have been seeing all if the amazing power numbers out of the LS based engines on here and tech. I have seen alot of cars with 500+ HP with heads, cam, and intake. But I just don't see the need to spend this kind of money when I think I can get the same or better results with a T-70 turbo setup on a basically stock motor.
So that is what I am going to do. I just ordered my turbo components today, they were the last on the long list of parts to buy.
I'm not sure if I want to lower the car yet, I want to see what it looks like (how it sits) with the motor in it. Since I bought the car 5-6 yrs. ago without a motor and trans. has been just sitting in storage. And I have been collecting parts ever since.
So this is the plan, and I will be documenting with pic.s as the build comes together.
The car just came out of the paint shop, now she has a fresh coat of arctic white with gold SS stripes (which it had from the factory), I will post pic.s later when I can get to the car.
The plan is to install the LM7 5.3 in the car then measure everything up for the hot side for the turbo. I am sure this will take some time but it is winter and I have a shop with most all of the equipment that will be needed.
For the motor I will be running an ls6 intake, ls1 cam, and a set of PSI bee hive springs. I'm not sure about what push rods to use yet. I will be using a ported slp oil pump, JP racing billet timing chain set, and ARP rod bolts.

As far as the fuel system goes I will be running twin in tank pumps in a 4th gen tank, -6 feed lines, and -8 return line, and aeromotive boost reference fuel pressure regulator, billet fuel rails, and 42# injectors. Not sure on what I will be doing for a filter yet.
I will be running all of the above into a T56 trans. with a spec 3+ clutch setup, custom drive shaft, and a moser 9" reared.
As far as the chassis goes I have a set of spohn sfc's and lca's. Like I said before, I'm not sure if I want to lower the car or not yet. I also have a set of C5 Z06 wheels 17-9.5 with 275/40/17 all the way around. On the brake side I'm going C5 Z06 front's, and ls rear's. I am thinking about a cage, maybe a 6 point. I just don't want any door bars.
I am really looking forward to this build, and I can't wait to be able to start getting my hands dirty. I would like to have it done by this spring. I would like to be able to run it on the power tour, and the lsx nationals. This will be a street car, not a drag car or a dyno queen. I am looking for 450-500rwhp in a fairly reliable combination. I think this should be doable.

Just a little background on the car. it is a 1987 IROC 305 carb car. No power options at all, other than brakes and steering. no AC, not even a power hatch pull down. It has 43k miles on it no rust anywhere. But when I got it the car was stripped, no motor, no trans. The interior was in good shape except the stock seats were shot. They went in the garbage. I did happen across a set of 160mph gauges/ cable driven. I haven't seen any of these before so I was like SCORE! So, what I have found out about my car is that it is 1 of 499 that were actually built for the IROC race series. Now this is just what i have been told, I don't have any documentation on this, but i guess the first 250 went to the race teams across the country. But anyway, I just ordered some stainless headers for the turbo system, the motor and trans. are ready to go in, I have my wiring harness all put together, but I will need to extend it so I am pretty close to really getting this thing rollin.
I do have a couple of questions though. does anyone know of a good tuner for when I get this all together?

speedfreak391

iTrader: (2)

Some pic.s of what I ha done so far.

speedfreak391

iTrader: (2)

Tell me what you think. Here is a link to the full build thread.
http://www.mifbody.com/vbulletin/sho...0-in-a-87-IROC

1999Black_Z28

iTrader: (1)

It's a little bit of an investment up front for the wideband and software but I highly recommend that you tune it yourself. This way it runs and drives exactly the way you want it to and you don't have to worry about making small changes that might affect the tune. It may seem overwhelming at first but it ends up being very rewarding.

If tuning is not your thing than pm hellbents10 (Baker Engineering), he's local to you and I had good experiences with him.

ThirdGenDemon

iTrader: (4)

Hey buddy, nice ride! Can you post the pictures from the mifbody page? We can't see them without making a profile on that page :/ It looks great so far! I'm working on my '87 IROC. Going boosted 5.3. Don't have a build thread just yet. I'm waiting to get further along in my build till I post anything on it.

N2OBaby

Nice build there 325 cid with a 70MM Turbo sounds like all kinds of fun there.

speedfreak391

iTrader: (2)

Here are some more pic.s. for you guys. I will take some more this afternoon. I finally got the seats in the car and now I need to get the console back in there. I will be working on wiring this week and the cold side of the turbo system once the intercooler is mounted up.

ThirdGenDemon

iTrader: (4)

Thats a purty engine you got there.

speedfreak391

iTrader: (2)

more pics.

ThirdGenDemon

iTrader: (4)

Looks nice dude!

speedfreak391

iTrader: (2)

Thanks man! Well I worked on it all weekend and finally got the exhaust to where I want it. Just waiting on a muffler now. Going stainless Dynomax race bullet to a turn down in front of the rearend.
Oh, yeah I almost forgot about my KORE3 flexcore brake lines, I only got the fronts for my brake conversion. I will be geting the rears when I convert the 9" from drums to ls1 disc's.
I also got the new radiator in and mounted the electric fans to it. I an gonna have to be pretty creative on the hoses since the hot side is pretty close to the drivers side outlet of the radiator. I think a rubber 90 to a aluminum tube to another 90. Ah I will show you what I'm talking about when I get there.
I did get the hot side completely finished this weekend.
Everything fits. CHECK
Waste gate plumbed into the exhaust. CHECK
3 O2 bungs fitted and welded in place. CHECK
Now I will get to work on the cold side(hopefully get that done this week) then its on to the wiring and this thing should be rollin! I will keep my fingers crossed!

ThirdGenDemon

iTrader: (4)

You are sooo much further along in your build. I am so jelly right now.

N2OBaby

Great progress would to see what she dynos either chassis or engine.

speedfreak391

iTrader: (2)

Im not looking for big #'s. I am hoping for 500 ish at the wheels.I don't think that is too greedy? Is it?

speedfreak391

iTrader: (2)

Well, I thought I would have been further along by now. But, I got to the intercooler tonight. Cut out the bumper to fit it(gotta love plasma cutters). I rad to remove just enough of the back side to fit the intercooler and keep all the mounting points for the bumper cover, oh and the fog light brackets. I am hoping that I can get it on the lift tomorrow so I can get the intercooler mounted, and get to work on the cold side. Looks like I will get to learn how to big weld aluminum. SWEET!
I'm getting closer and closer to this.
I will be posting some more pic.s this weekend.

speedfreak391

iTrader: (2)

So I got the intercooler mounted into the bumper, and now I am working on the cold side pluming. I have everything measured up and I will be cutting the tubing I have and welding it up. I would ike to use as little silicone joints as possible. Not that I am looking to run big boost numbers, but they are the first things to leak. So I will be welding it all up. Next will be the wiring.
Let me know what you think.

speedfreak391

iTrader: (2)

ok so the pics aren't loading up. You can see more pics over here.
http://www.mifbody.com/vbulletin/sho...624#post763624

speedfreak391

iTrader: (2)

So I am thinking about changing my cam set-up to a ls9 cam. I think thee is a little bit of work that will need to be done but I think it would be a step in the right direction for the boosted application. I have a stock ls1 cam in it now but I think the ls9 setup would be better for what I am looking for in a street car. I would like to keep it as much of a sleeper as possible. Which of the 2 cams would be better in your opinion?

speedfreak391

iTrader: (2)

Ok, so today I got the inter cooler as plumed as far as I can. I need one more 90 to finish from the IC to the TB. Then its all good to go. Then once I get everything plumed I will take everything back off, and wrap the complete hot side to the exit of the engine bay. Once I have the hot side off I will wire everything up and HOPEFULLY I will have a running car. Oh, yeah! I should really start thinking about coolant hoses. And I need a place to mount my meth kit.
I may be pulling the motor out in the near future, since I did order the LS9 cam and the other stuff to go with it. So, that should get done while the hot side is off also. I will also be putting the 4th gen motor mounts with poly bushing at the same time. And, Im sure this wont be the last thing that I have to do, but I still need to get a drive shaft made for it.
One step forward, 2 steps back.
I will post some pic.s tomorrow. We all love pic.s!

speedfreak391

iTrader: (2)

Sorry guys my pics are to big for this forum. Check them out at the link I posted above.