Vega Time,AGAIN!!! Now going twin turbo...

[chevyart]

rick i was wondering where the heck you have been. hope you get the engine straightened out so i can see some more vids. good luck art

[Bullet]

Looking through the thread, you know this is absolutely ridiculous,,,,keep up the good work!

[Rickracer]

The car went 10.30@130, 10.33@123 and 11.04 at 120 at Funday Sunday, leaving at 2000, with no boost. It seemed to be laying down on the big end, not sure why, my LM-1 was out at Innovate being repaired to save a log. Now it's set up to log AFR, RPM, and boost. Max boost on Sunday was 11 psi, with 4 psi wastegate springs. Once I figure out why it was laying down in high gear, I'll put the 10 psi springs back in it and start playing with the launch retard. I think there's some mid to high 9s in it with a bit more tuning, 60' was in the 1.60x~1.55 range, leaving with a bit of boost should drop that by a fair bit. What I really need now is a "Glide w/a trans brake.

http://youtu.be/NTLUYyLuJRE

http://youtu.be/VXt0WE3Km2k

[megavega]

keep at it Rick, youll find it! Tuning is a long process. I definitely agree about the 60fts, take off 2 /10ths 60ft and youd already be running 9.90-10.00ET, every 1/10th of the 60 equals 2/10ths off the 1/4 et.

[waybad]

looks like fun to me!!

[Rickracer]

Found out why it was laying down in high gear, the fuel filter had quite a bit of blockage. It's a stainless mesh, so I cleaned it out real good, and my fuel pressure went up, so I'm pretty sure it was restricting the system enough to cause it to lean out a bit on top end. I'[m logging boost, along with RPMs and AFRs on my LM-1, using the MSD MAP sensor for input now too. Gonna go make a couple of passes at Lakeland this evening, and if all goes well, I'll put the 10 psi wastegates springs back in and see what happens. Maybe some high 5s???

[megavega]

cool, you have located the issue. cant wait to see what it runs. When you eclipse high 5's in the 8th is startin to "get er done!"

[Rickracer]

Bogged off the two step, thought it died but it stayed running, so I stomped it anyway, went 7.8 at 109 with a 2.8X 60', so it's making some power, AFRs are just a little leaner than I'd like, but plenty safe. Then it started raining,
And now the turbos are leaking oil into the exhaust, both of them,

[Rickracer]

Turbos are still leaking some oil, but I put restrictors in them, and it's not too bad, got some new seals coming. It went 9.993 @126.x mph with a 1.7x 60'. at OSW Friday night. I put the 10 psi springs back in the wastegates, and it's definitely blowing through the converter now. Limiter is set at 6200, and the shift light is on from about the 330' all the way to the stripe.

Vids:

http://www.youtube.com/watch?feature=pl ... UNmqpD7QzE

http://www.youtube.com/watch?feature=pl ... SG0HVdLZX8

[megavega]

Oh ya thats lookin better. I was gonna ask if you had restrictors in your oil lines as the turbos dont like big oil psi. What did you use to restrict them like carb jets in the line?

[Rickracer]

I'm using 3AN lines to feed them, I just tapped the AN inlet fittings for brass 10x32 setscrews drilled to .0625. Might try going down to .040,

[Rickracer]

It's been a while since I've been back with a progress report. I finally got a Glide in the car, with a brake and a tighter converter. A few weeks ago, I hit a 9.66 @139.78, but that's still just scratching the surface, it was a 2800 rpm launch, limiter at 6200, and only 14 psi of boost. Should go a LOT closer to an 8.9x pass next time out.

Here's the 9.66 pass: http://youtu.be/S59riYnpBWw

[waybad]

[prochargeroldsmobile]

hi
I read your turbo project and you are running E-85 I also run E-85 and with a blowtrough carb at 25 psi boost
I didn't get it running well, the fuel demand was to big.
with double needle fuel bowls from Gordon Bishop superior airflow
that solved the fuel demand and for more safety a catchtank up front and water-methanol injection that hits in at a chosen boostlevel.
a picture on the carb and you can see my engine bay on my thread here on the forum

[Rickracer]

Last time out, it leaned out. The BG400 pump couldn't supply enough fuel pressure. I had bumped the 2 step to 4000, upped the rev limiter to 6800, and upped the wastegates to 16 psi, which should have made about 20 psi manifold pressure, and the BG pump, ( I found out after the fact), is only good for about 25 psi. When I tested it, it deadheads at 32 psi. So, 6.5 psi base fuel pressure + 20 psi manifold pressure + the 6~8 psi differential between hat pressure and manifold pressure means 32.5 to 34.5 psi was demanded by the regulator. When boost rises above fuel pressure, it will actually push the fuel back toward the fuel cell/tank. I'm pretty sure the rings butted, (I never planned on boost or nitrous when I originally built this motor, so never opened up the ring gaps accordingly), it broke a piston on #3 and cracked that cylinder wall. So right now I'm doing up a .040 over, 2 bolt, cast crank, hyper flat top piston motor I bought months ago, just because it was a really good deal, and I'm porting a set of W/P 2.02/1.60 S/R heads I've had laying around forever, for it. They started out at 165cc intake ports, I raised the roof of the intake ports about .150"~.200", (to match the Bowtie Victor Jr. intake, 1205 gasket), and opened up the pushrod pinch points, d-ported and opened up the exhaust ports to match my turbo headers, and I'm just about ready to check port volumes again, then match the combustion chambers to the cylinder walls. I'll be dialing back the boost a bit to begin with, but with the new Holley Billet Dominator fuel pump, the better matched heads, and lower compression ratio, this motor may wind up being nearly as fast as the other one. Not sure if I'm going stock block with splayed caps, or aftermarket when the good motor goes back together, but it will be planned out to go DEEP into the 8s. Got any info on where to source those dual inlet bowls? I don't need them yet, but may later, when the good motor goes back together.....