Fastest possible pump gas set-up???

[PaCemkr86]

16,000 mile stock GN ....LEAVE IT ALONE you have other cars to go beat on if ya want

lol.. thats what i was thinking.. lets see some pics of the blown 409

 

[coach]

Hello Grumpy, I did not buy this car to let it sit nor destroy it. I just simply want to tweak it a little. I was told buy some other guys at a cruise , prior to me purchasing this car, that an 11 sec GN was just a few simple mods away. Low and behold it turns out that they were dreaming. The car is strong, but not compared to my others. They are sitting because the only station that sold CAM II went out of business. My 409 will not run on octain boosters and the Max Wedge is a factory 13:1 car so that goes without saying. I love to drive the GN and it will be driven. It is a t-top car and therefore cannot be made to fast without a cage. I was thinking that with 1500 bucks or so this winter could the GN pretty warmed over. It will never touch either of the others, but that was never my goal. I will not ruin this car nor take the risk of damaging it beyond the normal risks of a good burnout . It is just in my blood to play around with all my cars. If I bought a car and left it alone, everyone would think I was sick or something. As soon as I bought the GN , I left the notory and went to the tire shop. The original tires and rims were removed and replaced with some awesome ET five window slots. I am just simply asking what kind of performance can I expect from the mods I listed? And if what I mentioned makes sense or not? I am not used to MAF's and injector sizes. I do Dominators and welded tunnel rams. If I am reaching in my guess, please just say so.
Coach

 

[PaCemkr86]

id love to see some pics of the 409...

 

[Jerryl]

..............If I am reaching in my guess, please just say so. ................

Coach,
Found a GREAT link for you with some recipes and solid ideas.
9,10,11 Sec.Perf.Receipes

PS
How was the game?

 

[deezdad]

Thanks for the info. I am not real familiar with the numbers being thrown around as it pertains to the different size turbos. Let me clear up what I was thinking. My car is a bone stock 16,000 mile beauty. I have already put in the Kirban variable rate springs and have airbags to install. My next step is to replace the original valve springs to bring back the correct seat pressure. I was looking at the Hooker cat back system with Flowmaster mufflers. My friend is a GM mechanic , monday thru friday and hot rodder on sat and sun,for the last 25 years and will do all the work. He specialized in the turbo buicks when they came in for warranty work. Next was an adjustable MAF and fuel pressure reg. A cold air unit as well. I do not know much about the injectors or this power plate. What are my best options??? I was considering changing the turbo as well as the intercooler so I could save the originals. I was leaning toward a stock appearing turbo, with ball-bearings. Would this be a wise move? I also found a nice intercooler with a nice aluminum air box that drops in place of the factory unit. I also need a chip. What plugs and what gap on them???
With good tires would this net 12 flats on the street? I have an 11 sec Max Wedge car as well as a 9 sec Blown 409 chevy. I will not be searching for another tenth after this is completed. I just grab a different set of keys.
I drive this car on nice days and do not want to risk it value in any way except some cosmetics under the hood.
Thanks for all the feedback. I am a high school football coach and I will check back as often as I can. Please keep all your info coming. I am learning a ton. While we are at it, can anyone give me some advise on stoping a 300 pound defensive tackle with a 190 pound guard??? That is tonights goal. The car has to wait until saturday.

Thanks a bunch,
Coach

As a steelers fan I'm sure you remember the playoff game in 89 @ Denver.. Chuck knoll ran the trap play w/ Merrill hodge most of that game and was working great they shoulda won that game I think it came down to a botched punt attempt it made me sick at the time...or just chop block him! J/k I know this is an ancient thread, was doing some searching n this came up .. Man you went from eager beaver to one of the heaviest hitters on this board in a short time coach ..

 

[BuickMike]

Man, I wish I could just have a straight pump gas car. The 91 octane E10 here in Phoenix is absolute crap. I haven't tuned for it with my new setup, but before I could only get 14psi with 17 degrees. With 93 octane on the same combo I was able to go 20psi. Right now I run 91 and alky and sit at 18psi with 21 / 19 degrees timing. I could up the boost, but then I blow off the tires everywhere I go. I have my car at a point where it would run great with 93 only. I'm sure I could pull off mid to high 11's too.

 

[ttypewhite]

One of the fastest pump gas street cars I have seen run some serious numbers was a board member and friend of mine named "bird". He drove up to the track on MT Et streets with his family. Full weight street car with a 109 motor, stock crank, stock rods, stock drive shaft with all the bolt ons. He dropped his tires pressure and ran 10.22 on 94 Sunoco pump gas back in 2008. Put the tire pressure back up, turned on the AC, put his family back in the car and drove a hour back home. This car has run 9.60's @ 140mph on C16. Video below.

full video with details below. Click the link.
http://www.streetfire.net/video/gra....htm?ref=61e6af88-b73a-4f16-bb51-988c001db428

 

[Mike T]

One of the fastest pump gas street cars I have seen run some serious numbers was a board member and friend of mine named "bird". He drove up to the track on MT Et streets with his family. Full weight street car with a 109 motor, stock crank, stock rods, stock drive shaft with all the bolt ons. He dropped his tires pressure and ran 10.22 on 94 Sunoco pump gas back in 2008. Put the tire pressure back up, turned on the AC, put his family back in the car and drove a hour back home. This car has run 9.60's @ 140mph on C16. Video below.

full video with details below. Click the link.
http://www.streetfire.net/video/gra....htm?ref=61e6af88-b73a-4f16-bb51-988c001db428

Thought I read an article about this car being stolen ?? If so did they recover it ?

 

[87GN_70GS]

E85 is pump gas and not race gas. There is someone going 7's on it.

 

[we4Mateo]

E85 is pump gas and not race gas. There is someone going 7's on it.

Manny Espino!

 

[Amelio]

I'll bite........

If you can get E-85 then toss some in the tank it will greatly help out....I run 4gal of E-85 then top off with 93oct.....I can run 17psi perfectly safe and a lil timing in it......

With that i run mid 11's on 17psi............I have the same view point as Carl......I like to keep things simple I just pump gas in the tank and go it does not get any simpler. The car is a blest on the street runs pretty damn good and I dont have to work on it. However I am not bone stock.......

Stock heads ported by champion
210/215 roller
T-66 and SLIC

other various items but that's the meat and potatoes.........When my car was stock I did not have the knowledge or experience I have now. If I knew then what I know now I would have have modded the car less.

 

[Mike T]

The bigger the turbo at constant boost the better the efficiency, assuming you are over about 15 psi boost for turbos like we run, so the less heat in the intake air. A 63E flows about what the 67 does, so I agree that it is more than enough turbo for stock unported heads. I doubt I would pick up any more hp going to a 70 with the stock heads.

What I've learned over the years, tuning at the edge of detonation with 93, is that if you use the standard calculation for injector size you won't have enough injector by about 20%. Most online calculators and Joe Lubrant's spreadsheet at gnttype.org assume a bsfc of .5, which is fine for race gas, but you need extra fuel to make up for the lower octane. I'm only running about a 70-72% duty cycle but I needed to make a chip for the 72's for a friend who goes much faster, and I wanted to prove to myself that I could run them on the street, and I would have been maxed out already on 50's (and 60's weren't available back then) so I went up to the 72's from the 40's. I run rich, but not super rich . AFR by LM1 is about 10.7-11. I've pretty thoroughly explored the tuning space of richer/more boost, leaner/less boost in that area and my car seems to like that best. I used to run 20 deg of timing but finally tried 18 last year, and another psi or so, and it may have picked up .1 sec, but maybe not. Even with 20 deg I was running 23-23.5 psi in 1st and 2nd, and 22 to maybe 23 in 3rd, but I didn't start the tune there . You don't want to know how many hours and chips as I tweaked and experimented and worked my way up. I think one thing that many people don't appreciate is how important the spoolup and transition fueling is - any knock there and it will take the motor a few seconds to recover and put extra heat in that ultimately limits what you can run in 3rd, for example.

Believe me, I understand the benefits of water and/or alcohol injection in the combustion process. I just don't want to deal with having to remember to buy it, worrying about how low it is, worrying if a nozzle is going to plug or a pump or fitting fail, or whatever. Most people that really push for max hp on alky are really running a hybrid fueled vehicle with anywhere from 10-30% of the fueling coming from the alky. At that level of performance you are so far past what 93 octane will support that if anything goes wrong with the alky system I don't think you could detect it and get off the gas fast enough to not hurt something, and that is more risk than I want to take. If you are only using it bump up the boost 1-2 psi, well, that's a lot of expense and hassle for a minimal gain. I don't claim my position is for everyone, it's just mine .

I know this is old but this is the most boost (23#s) that I've heard of on 93 octane. His tune must be dead on.