kwhizz

As I remember....you have a Holley oil pan............Any interference with the steering???

1989GTA

Not at first. However when we raised the rear transmission mount some more to gain more transmission oil pan ground clearance that cut down on the Holley oil pan steering clearance. So we welded in some steering stops to eleminate that problem. We could have raised the engine some but welding in the stops was a lot easier solution.

1989GTA

Update: Installed the latest E38 ECM and my throttle position codes have gone away. Now I have the crankshaft position code P0315. Plus a couple of others that I need to delete in HP Tuners. I also have to swap wires 1 & 2 on my MAP connector. Hopefully I am getting close to putting this car on the road. Going have to learn how to do a crankshaft "learn" or reset with HP Tuners.

TrueBlueGTO

Sweet! You are should be out running and racing soon!

kwhizz

Where did you get the trans crossmember.......


Thanks

Ken

1989GTA

I have used two of them. The first one was from CPP but did not quite have enough exhaust clearance for my dual 3". The 2nd from Summit has plenty of clearance but is a little heavier. Here is the link to the 2nd one I bought. Fits fine by the way.

http://www.summitracing.com/parts/su...lark/year/1965

Now if I can just the fuel tables squared away to get this thing on the road. I have HP Tuners but this is my first go with it.

1989GTA

Brought the car home from the shop today. Seems to be running decent enough with the TSP tune. The mechanic wanted to drive it around the parking lot some to see how good it was running and if we could carefully drive it home. He was a little surprised when he gave it a little gas and not much happened so he gave it a little more and here is a picture of the results. This is not wide open throttle by any means. Needless to say he was not expecting a burnout.

I have changed the schedule around some. Going to the dyno out at Westech first for a complete tune. Then to the alignment shop. Then on to the paint shop and finally the upholstery shop. I will try and get a picture with sound of the idle with the TSP VVT3 camshaft.

bsharpe

iTrader: (3)

Nice job with the build. I ran into the same issues with the mismatched TCM/PCM and the Throttle pedal wiring. your lucky that the information is out there now, it seemed like no one understood the new wiring and electronics when i did my swap. Sorry i didnt document my car better i could have save you some time.

A shallow pan for the 6l90 does not exist but the g8 pan can easily be modified to work. It saved me almost an inch of clearance and my edelbrock headers are now the lowest thing on my car again.



I will be watching to see how you like the paddle shifters and corvette tune. I currently have a toggle switch on my dash for manual shifting but it isnt worth it with the truck tune that i am using. I hope to update my tune, wiring, and add paddle shifters this winter.

1989GTA

Thank you for the information. I will look into the G8 pan. Do you happen to have a part number? According to John at Speartech one may not need the paddle shifters with the later Corvette tunes. The tune is that good. I have brought the wire into the cabin from the transmission so I am set up to go the paddle shifter route.

As an update, I have date with the chasis dyno next Thursday the 17 and maybe Friday the 18. Going for a full tune from idle to wide open throttle. I will post the results. If I get 450rwhp I will be somewhat disappointed but it would be OK. If I get 470rwhp I will be very happy. If I get more I will be ecstatic. Stay tuned.

1989GTA

After double checking I think I looked at the wrong pan down at the local dealer. The one I looked at was the same depth as the one I have now. I need to look at pan 24239528 which appears to be shorter than the one I have looking at the pictures. Also filter 24252158 that goes with it. Maybe that will give me another inch of clearance. I will let you guys know what I find out. By the way all this info was given to me in post 218 . I sure goofed up the info somehow. At least I am back on the right track.

1989GTA

OK, I got the Skylark dyno'd today.

Edit: See post 253 below.

speedtigger

iTrader: (16)

Post it up in here too. 473 HP is going to run hard.

1989GTA

Finished up the dyno tune today. The graph is posted below. We could only got one good graph as the transmission would keep down shifting no matter what we tried plus other gremlims. This is on a Superflow dyno.

Engine is a L92 out of a junk yard. Has LS3 intake and ported throttle body. Transmission is a 6L80. Yank SS3200 converter that was unlocked for the dyno pull. Camshaft is a TSP VVT3. I could not believe that the tuner got this motor to idle decently at 700rpm. Specs are about 231/239 at .050" on cam. PRC CNC ported L92 heads with the valve spring upgrade. Kept the VVT. Headman 1 3/4" to 1 7/8" headers. Pypes Y pipe and 3" Exhaust. Yours truely cold air intake.

After this run we did see a 473rwhp plus we did some more fuel trims that were done later that could have added another couple of horsepower. The transmission just would not co-operate and stay in 4th gear. The dyno operator just had to kind of roll into it.

1989GTA

I will take the car to Bakersfield this winter and see what it will do. By the way today is the first time I really got to drive the car around. I was pleasantly surprised as to how well it drove. The power stearing with the Jeep Cherokee stearing box was great. Lots of power on tap and rode real good. Now on to the paint shop and upholstery shop.

ringo234

Congratulations Allen.

1989GTA

Thank you. If you are a good boy I might let you ride in the car.

ringo234

I'm always good.
Oh maybe you won't need to drive all the way to Bakersfield since Fontana is going to be up and running in 2014.

1989GTA

A little update now that the car is running and I can check out some things. I had ordered the front wheels with a 5" backspacing. As it turns out I probably needed 5.25" of backspace with the Nitto 555 255/45ZR17 tires up front. The front tires do rub some. So the cheapest solution is to go down one tire size. I will put on Nitto 555 245/45ZR17 tires up front. This will give me the extra 1/4" I need. It will only drop the front of the car 1/8".

I had ordered the Speedhut Legacy speedometer and tapped into the VSS signal between the 6L80 transmission and the E38 ECM. This is a yellow black wire. Well, in my case this did not work. The speedometer is very eratic.
However since the time I ordered the speedometer from Speedhut they have come out with a CAN version. I only have to tap into the low and high communication lines going to my ALDL connector. The cost is $199.99 and I just placed the order. In fact the whole set of gauges can be ordered that way. I would have done that in the first place had they been available. A lot easier to wire and a lot less wires.

y5mgisi

iTrader: (2)

Interesting! Good to know!

1989GTA

Progress update. Got the front end aligned. This morning I took the car to the paint shop. It will be getting a Lexus Starfire Pearl White 077 paint. This is a 3 stage paint job.

Next up will be the upholstery shop to finish off the interior. That should be it on the major stuff. I plan on doing some upgrades. Right now I have a 1" rear sway bar and a 15/16" front sway bar. I am thinking of either a 1.25" or 1.375" front hollow sway bar.

I have 11" disc brakes with a single piston on the front and I am thinking of going to 13" disc brakes with dual pistons on the front. I have 11" disc brakes on the rear with a single piston.

I will appreciate any input.