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Old 05-18-2012, 01:15 AM   #1
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Default Turbo LQ4 1970 Camaro RS

Starting a new thread since my previous one is very different than where I'm going with this one.

For the old thread, you can see it here: 1970 Camaro RS: Operation Budget LSx

Car is a 1970 Camaro RS with a LQ4 and a 700r4. Trapped 111mph with the secondaries only opening 1/8th of the way. Had full interior, street tires, etc.

After getting down the track twice last year with a carb'd cammed LQ4 with shaved CNC ported 241s, I got home and promptly tore 500 lbs of stuff out of the car. Then, after driving home from my folk's place and listening to a turbo'd late model RX7 cruise next to me while stuck in traffic...I know, but still...the turbo sound sucked me in. So, I sold off all of the carb stuff (thanks you the people who bought my stuff!) and picked up a TC78 with a 1.15 AR housing.

Click the image to open in full size.

I grabbed a Howard's Cams mild grind with a wide LSA. 226/232 @.050, .578/.587 lift, 115LSA. Installed it and degreed it. Also got a set of stock 317 heads to get my back to a forced induction compression ratio. Slapped my PRC .660 lift springs on them and put them on the engine with a set of .040 MLS gaskets. Then I temp installed some truck manifolds and set the intake in place to get some ideas going.

Click the image to open in full size.

Driver's side will be easy. I will slap a v-band on it and just do a gentle curve around the alternator and into the cross-over.

Click the image to open in full size.

Driver's side, in order to get a nice bend into a merge near where the turbo will be placed, I will have to cut in back a lot before I put a v-band on it. Kind of points off into nowhere right now.

Click the image to open in full size.

I'm going to place the turbo somewhere roughly over the frame rail and at the same level as the headlights.

Click the image to open in full size.

Click the image to open in full size.

First major modification for the turbo install was drilling and tapping the oil pan for a drain fitting. My goal right now is to get the engine sealed back together before I do anything else. Here it is with a -10 to 1/2 NPT fitting in the flat space on the passenger side of the oil pan between where the starter and cross member would interfere.

Click the image to open in full size.

Click the image to open in full size.


Build plan is to use a 44mm wastegate, 50mm BOV, ebay intercooler, Aeromotive A1000 fuel pump and regulator, fuel cell, truck fuel rails and intake, and.....

Does 15psi and 3,000lb race weight sound fun to anyone?
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1978 Oldsmobile Cutlass lightweight, 6.0L LQ4 PRC Stg2.5 5.3L heads, Howards 226/232 Cam, SLP 1.85 rockers, pacesetter headers, 4" CAI, SD Tune w/HP Tuners Pro, LC-2 Wideband, shaved truck intake, 4L80E, Circle D 3,200rpm stall, 4.30 gears 8.5 GN rear
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Old 05-18-2012, 12:36 PM   #2
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Have a very similar setup in my truck. 10:1 iron block 6.0, tc76 at 15-16 psi. Made 793 rwhp 939rwtq the other day. Runs 10's in street trim with poor traction. I have a 73 camaro I'm putting together also. Will have an L33 with tc76 and a 4l80e. Very interested in your build, should be a wicked fun car!
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Old 05-18-2012, 01:02 PM   #3
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Looks like you have a good start to it. looks good. A buddy of mine is getting ready for a similar setup with a 5.3L on his '70.
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Old 05-19-2012, 01:17 AM   #4
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It should be a fun project. Next step is to gather the hotside piping and wastegate...also need to get the intercooler and install it to help with locating the turbo. This is going to be a long, slow project now that I've decided to go back to square one.
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1978 Oldsmobile Cutlass lightweight, 6.0L LQ4 PRC Stg2.5 5.3L heads, Howards 226/232 Cam, SLP 1.85 rockers, pacesetter headers, 4" CAI, SD Tune w/HP Tuners Pro, LC-2 Wideband, shaved truck intake, 4L80E, Circle D 3,200rpm stall, 4.30 gears 8.5 GN rear
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Old 05-19-2012, 08:10 PM   #5
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Just finished my 70 camaro turbo lq4 trust me you will not be disappointed ))
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Old 05-24-2012, 04:13 PM   #6
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Quote:
Originally Posted by griffsbombelco View Post
Just finished my 70 camaro turbo lq4 trust me you will not be disappointed ))
I checked your build out and I'm drawing a few ideas from it. One thing I'm going to do is cut the passenger side manifold flange off and weld on a v-band and an angle that will allow a nice merge into the turbo. Trying to avoid the big double back you had to do with the passenger side pipe.
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1978 Oldsmobile Cutlass lightweight, 6.0L LQ4 PRC Stg2.5 5.3L heads, Howards 226/232 Cam, SLP 1.85 rockers, pacesetter headers, 4" CAI, SD Tune w/HP Tuners Pro, LC-2 Wideband, shaved truck intake, 4L80E, Circle D 3,200rpm stall, 4.30 gears 8.5 GN rear
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Old 05-25-2012, 12:26 AM   #7
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Did you have to cut the frame for the oil pan? I'm going to be putting mine in in a few days and was curious. I put my drain on the opposite side about the same place. I'm going to put my turbo on the driver side on mine since I plan on keeping AC. At least I'm hoping I'll route it that way.

looks good
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Old 05-26-2012, 01:06 PM   #8
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No cutting needed at all. Actually getting the pan and covers back on today.
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1978 Oldsmobile Cutlass lightweight, 6.0L LQ4 PRC Stg2.5 5.3L heads, Howards 226/232 Cam, SLP 1.85 rockers, pacesetter headers, 4" CAI, SD Tune w/HP Tuners Pro, LC-2 Wideband, shaved truck intake, 4L80E, Circle D 3,200rpm stall, 4.30 gears 8.5 GN rear
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Old 05-26-2012, 02:37 PM   #9
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Quote:
Originally Posted by 1970camaroRS View Post
I checked your build out and I'm drawing a few ideas from it. .
Quote:
Originally Posted by griffsbombelco View Post
Just finished my 70 camaro turbo lq4 trust me you will not be disappointed ))
How do I check it out? Link please?

thanks in advance.
Jim
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Old 05-26-2012, 02:37 PM
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15, 1970, 70, 700r4, 78, 87, camaro, carb, engine, lq4, psi, rs, tc78, turbo, turbonetics


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