Is a 5.7 tpi stock even a fast reliable engine?

I mean compared to a ls1 or ls2. I mean stock you get 345hp or so and what kind of work do you have to do to get to like 380hp?!

I mean I'm not looking to race but for the price of a true 5.7 1200$ or so for an engine and tranny, compared to ls1 ls2, 3k 4k


Basically what I'm asking is a 5.7 350 still a respectable engine and fast today?

 

It is if you take the time to build it properly. First thing you'd need to get rid of, is the stock TPI setup. It is the number one contributing factor to our power restrictions. Gears, Cam, Stall, Exhaust, all play a part in competing with the LSX power plant.

The bottom line is - GM did they're homework with the LSX engine.......you'll have to do yours to keep up.

 

so replace stock tpi setup with what.






L98 Stock 5.7 out of a 91.

 

Are you familiar with the Holley Stealth Ram intake? Is so, that's what I have and would recommend it to anyone looking to improve the top half of the motor.

It can still run with a factory chip......custom tuning is not required.

 

camaros suck, sell it and get a mustang for sure

 

That's it, you're banned......

 

on a logical side, there is nothing wrong with towing a mustang...

 

Not familiar what does it enhance and do performance wise and cost? U have a picture of it in your L98?

 

Here ya go.....there's always one for sale every month in the classified section. Usually they sell for $500-$600, but that depends on what's included.

 

Damn that looks clean !

 

Stock LS1s will put out 345 HP net flywheel HP. L98 is more like 245. Coaxing another 100+ HP out of a TPI means heads, cam, induction (like the Stealth Ram already mentioned), and good exhaust. It can be done, but don't expect it to be done with a $1200 engine.

 

Well bought a parts car for 1500$ comes with stock 5.7 and tranny its a true 5.7 350 tpi

It's a 1991 z28 stock was in a crash that's why I'm parting it.

 

That Holley stealth ram looks amazing what does it do performance wise, hp, does it kill your gas mileage is there any other set ups similar that are better?

Just looking to build up the stock 5.7 L98 before I put it in my Camaro. Thank you for all help suggestions and recommendation.

 

I pm'd the info below to you, but it's better to post in an open forum......


Here's a link to a search I did. Orr did a nice build, and his track numbers tell the story.

The setup alone won't give you big numbers, however the right heads, cam, etc. are the key. Just by itself you may gain 30-40hp, some have seen more.....but I didn't.

Don't forget to do a search.....read, read, read. Especially in the Alternative Port EFI section. You'll find out more than you want to know about all your options before you make your intake decision.

Me personally, for the price they sell - you won't find a better setup than this one. Gas mileage is bad on my car, only b/c it's a high compression 383 and I choose to dump more fuel in it. Yours doesn't have to be built that way.

https://www.thirdgen.org/forums/al...ealth-ram.html (My Holley Stealth Ram swap)

 

There's nothing wrong with a stock TPI 350 in a street car. Sure, you aren't going to keep up with LS1s at the track, but on the street, from stop light to stop light, a nice mild TPI 350 is nothing to be ashamed of. It'll smoke 95% of the 60's muscle cars that everybody seems to think are so great. They make huge torque, which makes them feel fast as hell. There's nothing wrong with building a TPI 350 if you're on a tight budget. You can always upgrade it later on.

 

I do agree, the street is where a TPI belongs. At the track, you'll probably have great expectations of your setup........but usually ends up in disappointment.

It all depends on how you will use the engine. Build according to that.

 

Well ls2 build with a tranny and from a v6 your looking at like 7K

With a parts car 91 5.7 L98 and tranny for 1600$ after you finish maybe 5K tops

 

What else would you recommend doing other than the stealth ram intake?

So for a stock 5.7 l98 your looking at like 245 hp

If you add the HSR + 20-30hp ?

 

You'll maximize the benefits of the HSR by doing other mods that will help the motor breathe at higher rpms where the HSR is designed to perform. This means a more suitable cam (as well as appropriate valve springs to handle the cam), and a free flowing exhaust system that consists of headers, high flow cat, and a good catback. A tune for the computer will also be required.

 

What cam and exhaust would you recommend? as well as cat back and valve springs. And do I have to change my roof rails to what

 

I'm no HSR expert, so I can't recommend a specific cam for it, but my guess is that with stock L98 heads, you're still going to want something with a little bit of duration to compensate for the bad flow, and with a semi wide LSA to bring the power band up to the 4-6k rpm range that the HSR is going to work best at. Maybe a 220/230 with a 112 or 114 lsa. Since the stock head flow is likely to stall above .500 lift anyway, you can use a cam lobe profile that doesn't have a lot of lift, which will be easier on your valvetrain and help keep the combo reliable.

But this is just my opinion. You're probably best off checking out other people's HSR builds in the alternative intake forum and corvetteforum.com. I'm sure there's plenty of examples of HSRs on stock L98s.

 

As a resident of Los Angeles, you're not concerned with passing smog?

 

You should pm Dyno Don since you are in cali like me and we got smog rules.

 

Heard good and bad about don. So I'm a bit is it hesitant

 

Well he is the guy you should talk to if you wanna have good power with tpi and still pass smog.

 

Ok thank u.

 

Off topic question what's that fin called on top 2012 Camaro called?
it's a small black fin helps with aero dynamics or gas mileage or something ?