More results from the turbo car

turboSpeed · 12-22-2002, 06:03 PM

Took her out to the track this weekend. The only mods I've done sinse the bone stock lt1 484/540 to the wheels are 30lb injectors and more duct tape and string holding the 1le elbow together. Damn fedex didn't deliver the metal elbow in time for testing. The engine is 100% stock except injectors, and an MSD digital 6 ignition. I also added an MSD booster pump. Still stock PCM programming.

This time I decided to go ahead and crank the boost up. The dyno above was an aborted run because the boost flashed to 10 and I got out at 4700rpm. With the fuel upgrades, the math said she should be just right. Runs at 10psi reading the hypertech confirmed with as much accuracy as the stock 02s will provide that she was doing fine. So I cranked the boost up to 11ish. She actually seen 15 a couple times but only for a second or so. I had my boost controller adjusted wrong so it spiked.

She put down a best of 11.93 @ 128mph with a 2.2 60 foot time. The nittos were slipping all they way down the track. It slipped so bad that I was hitting the rev limiter about 40ish feet before the end of the track in 4th gear. Car is an M6 with a stock 3.42 rear.

The really funny run of the day was a 13.5 something at 117. I have a feeling that if I had some traction, I could have broke the 130mph barrier even with the slow 60 foots. Comith a rear end and slicks, I think she will go quick.

Anyway, this winter will bring a rebuilt and more efficient exhaust system though I am going to try to make more et with less boost. It still plumb full of bugs that need to be worked out. Hopefully by next summer everything will be tip top and I can go ahead and build a kit for those intersted. Anyway, I might be on borrowed time but I'm curious just how fast I can make her go on an basicly stock car with a turbo. More updates to come.

INTMD8 · 12-22-2002, 06:10 PM

Do you have any pictures of your setup?

Maybe I'm missing something here, but 128 mph @11psi with a bone stock engine/programming and 30lb injectors is kind of hard to swallow.

turboSpeed · 12-22-2002, 06:47 PM

I am running an FMU obviously. I bought it on eBay for 35 dollars. I was also on race gas. Like I said before, I don't have any pics of the setup yet. Because at some point I would like to turn this investment into a business, I don't think posting pics would be a good idea. Vortech doesn't tell people how to build their superchargers.

I have already posted the dyno charts so I might scan a couple of the more interesting time slips and post them. I couldn't really believe it either. On that pass, I gained 30mph between the 1/8th and the 1/4. I crossed the 1/8th at 98mph. You will see it on the slip.

To add to the above comment.. I do want to offer that I am willing to help anyone out with their own turbo setup. I've had several inquiries from people that have other turbo setups and wanted to know if I could sell the exhaust system seperately. The answer will be YES! I will sell the kit in peices. My goal with the kit is to give more bang for the buck than anything else out there.

INTMD8 · 12-22-2002, 11:38 PM

Well, people can buy Vortech superchargers and disassemble them. It doesn't mean they have the skills or tooling to duplicate them.

If you don't want to post pictures of your setup than that's your decision. Could we at least get a basic description of manifold construction, turbo placement etc? Is it intercooled?

Do you have the wideband printout to correspond with the dyno sheets as well?

BTW, how are you running 30lb injectors with no tuning?

Sorry for being a skeptic, but if you aren't willing to post pictures, you have to expect it.

turboSpeed · 12-23-2002, 12:22 AM

Oh by all means, I understand the skeptisism (SP?). Driving home that day I wondered if the car hadn't been modified internally before I bought it. I bought it last jan with 36k miles. But I did dyno it in June with headers, FIPK, throttle body by-pass, and home made resonator delete plug. I dynoed 260ish/300ish. I found out later that the throttle cable was stretch really bad (had another 25% more room to open the throttle blades). That might acount for the low horsepower but other than that, it acted very much like a stock LT1.

The dyno charts I posted in the other thread were with 24lb injectors. The car actually drives just fine with the 30s. Throttle response is peppier and seems to have made the car "happier" if that makes sense. Two reasons I got away with it. 1 is that i have larger than stock diameter maf ends which will lean the car out a bit because the maf is calibrated for a certain air flow for a certain resistance on the wire. Larger maf ends will flow more air for the same resistance. 2 is that under part throttle, the computer will adjust your injector pulse for a rich or lean condition. Under full throttle (75%) plus, the computer flows fuel based on the preprogrammed maps and ingnores the 02s completely. At the same fuel pressure, the 30lb SVO injectors flow about 25% more fuel than the 24lb injectors. I read somewhere (Injuneer I think) that SVO rates their injector flow at 39.5 PSI vs 43.5. With the booster pump maintaining the pressure and taking the load off the stock pump and the FMU ramping fuel pressure, I figured that the fuel system will be good to about 14lbs of boost. Putting 30lb SVO injectors in an N/A car would not work because those fuel maps are calibrated for 24lb injectors. It all worked on paper and seems to be working in practice.

***Disclaiminer***
I do not claim to be an expert on these computers. Infact, they are my next big learning curve. Injuneer has an excellent article on them for anyone curious about them. Recommended reading.

I am sorry for being a little sticky on wanting to keep the details of the kit on the down low for now. If someone buys my kit and disassembles it, more power to them. They will deal with the patent problems. I spent a great deal of time even though I didn't spend a great deal of money building the kit. I would like the oppotunity offer the kit or it's components for sale.

Heh, another reason I want to wait to get some pics posted is I want to clean up a few things. I ran that 128mph pass on a 1LE elbow held together with sting, duct tape, and hose clamps! It is some quality engineering. The maf kept popping out of the induction tubing on the inlet side of the maf so I tied string to that pipe and the other side of the maf to hold it all together. It works tho it leaked like hell. When things are "pretty" I will be posting some pics.

BigRed1 · 12-23-2002, 09:04 AM

I know tons of people would be interested in pics of the set up as well. And I think we can imagine what it'd look like with a decent elbow. I can understand wanting to keep the details to yourself though. Keep us posted.

racr4jc · 12-24-2002, 05:27 AM

Is this a twin or a single setup, or is that classified as well?

BigRed1 · 12-24-2002, 05:36 AM

I'm 99% sure it's a single. I think I read it in another thread. I'd love to hear more about this. The torn elbow thing seems odd because I know with turbo cars and the smallest crack or boost leak throws things off in a big way. Weird this one still runs fine. I get a small leak and run 108BLMs with the car barely limping home. Guess some people have all the luck.

94-3.4 · 12-24-2002, 02:12 PM

Keep up the good work! Can't wait!

EDS Z28 · 12-25-2002, 10:50 AM

That's funny about the elbow. I tried my stock LT1 elbow and fabricated a piece of wood to plug up that silencer hole on the bottom. Under just a little gas, the elbow blew up like a balloon! I tried taking it around the corner and it didn't work too good. That piece of junk.
After seeing this, I thought of using the vortech elbow. I found out that the elbow had a 3.5" inlet, perfect match with the MAF, which is also 3.5". The vortech elbow/maf thing ended up working out really well.
I may try some MAF ends one of these days, along with a solid intake pipe to the supercharger. Found out on my last dyno I am running rich from 4000 rpm on up. With the cold air around here lately, my motor is pumping out power like it never has before, car is getting really squirrly.

Zdawg · 12-25-2002, 11:21 AM

Nice results. I'd like to see some pictures. I'm sure it's not going to cost you any business. If there is a company out there capable of making a twin turbo kit, they would have by now if the thought there was a market. It's not like everybody is sitting around scratching their head with no idea how to fabricate a turbo kit. I'm sure they just don't see the point in making a $6000 twin turbo kit for a car worth only $8000.

Zdawg · 12-25-2002, 11:21 AM

Nice results. I'd like to see some pictures. I'm sure it's not going to cost you any business. If there is a company out there capable of making a twin turbo kit, they would have by now if the thought there was a market. It's not like everybody is sitting around scratching their head with no idea how to fabricate a turbo kit. I'm sure they just don't see the point in making a $6000 twin turbo kit for a car worth only $8000.

Z284thgen · 12-25-2002, 11:19 PM

to add to some of you guy's disbelief ?'s yes this car is a prototype so far for him it in fact does have a hole in the elbow that was created while headed to the dyno for the first time with the new setup ( what an interesting time at Mcdonalds that was ) . and yes this car is bad a$$ for the mods that are done. before the turbo we raced several times and he was hanging with me so it was then determined that his car was pretty much stock at the time

BigRed1 · 12-26-2002, 05:59 AM

I don't know that it's so much disbelief as it is wanting to believe. I know it can be done and really really hope this comes to be. I love turbo power and am interested in the kit but without knowing anything about it (besides it exsists) I'm hard pressed to put much interest in it. Hopefully it'll get through the prototyping stage and when it does, drop me an email or post some info here on the board. Good luck and hope to hear from you soon.

Whistler · 12-26-2002, 08:50 AM

Don't expect much positive feedback since you are claiming to have the fastest and most powerful boosted stock engine Lt1 anywhere, yet don't feel like putting pictures up.

Is it THAT ghastly looking?

Does it really even run... or are you fishing for attention?