Ok here is my situation. 97 Formy A4, 80k on stock motor. Currently have basic boltons, 3.73's, Long Tubes, CAI, True Duals.

I am in a toss up inbetween doing heads and cam, or going supercharger.

I figure that they will both run me around the same. But N/A may cost a little bit more concidering I will need to go with a new converter, and will need a dyno tune. Where with the supercharger , I can use stock stall for now, and can run it on stock tune.

The reason why Im concidering supercharger, is because the car isnt really raced alot, or driven alot. So its not going to be subjected to most of the abuse most people put on their LT1s. And with a intercooled unit I could lower the boost around 6psi and make around 400 at the crank no porblem. But I read some of these posts and you guys try to talk evreyone out of boosting a stock bottem end LT1.

So please cast your vote, and leave your reason why you selected please. I rather get insight from a large group of lt1 owners who own setups like this, then some salesman over the phone or at a shop.

Thanks,
Mike

 

come on folks help me out here. And when you vote, please reply back why you choose what you did.

Thanks,
Mike

 

That's because it probably won't last very long.

 

I'd do heads and cam. You open up a WHOLE new can of worms when you starting moving to forced induction, especially on an engine that wasn't built to handle it. Plus you'd wind up spending a lot more on supercharging than you think.

 

If you can afford forced induction, go forced induction.

 

B/c a SC is going to blow your bottom end out in about 5-10k if you are lucky.

Heads and cam can be controlled a lot better, and is more worth it. AND you have more choices.

I don't have to repeat what everyone says, if you read around, or go to the SC forum, you will see. The stock bottom end was NOT made to handle it.

 

i would do heads/cam, you will make about the same power (what is 6psi?!?!) and it will be a lot more reliable

 

Do not install a SC on a stock LT1 bottom end unless you are prepared to rebuild it.

Rich

 

k thanks for the info guys. I was reading the FI forum. And see that they always push people away from FI.

But they didnt always give they're reason to why. I was intrested because of some of the people running supercharges on stock bottem end with no problems.

Mike

 

You will 'hurt' that motor to put it mildly.
Your stock CR is too high.
It would last for a while but then Kaboom.

One major point; you forgot to tell us what you're going to do with the car. Street and a little strip or just street or mostly strip?

I have $7K in a motor I am building and still have not finished.

Jim

 

heads and cam.

 

aintno6, I modified your subject. In the future, please use a more descriptive subject than just something like "poll" as it will get more people to click your topic

Thanks!

 

I was in the same boat last fall....97 Formy A4, 85k on stock motor, basic boltons, 3.73's, shorties, CAI, etc. What I ended up doing was picking up a wrecked 97 Trans am with 33k miles and pulled the tranny/motor and put heads/cam/long tubes/stall/et streets. I get 21-22mpg mixed driving and 16-17 all city/racing. The car ran 11.84 at 114.7 all motor, and this is with a small cam(~220/226).

 

I statedwith a hot cam
added 6# SC
have now sold both and gone heads and cam.

I was lucky and did not break anything but most folk do break at least a ring.

My advice - if you want to SC it - then do it rght - save your $$ - forge the bottom end and go 12# +. A small 4.5 or 6# blower is not worth it.

Realistically - have your heads ported and get a good cam and valve train - Budget $2,500 and you will have a car that will rival the low boost setup your considering - for less money and without the nagging fear of breaking something.

 

Heck, do both. I did. You only live once, and it's only money after all.