Will this work? and does tpi have any advantages over carburater or is carburated better??? sometimes when i slam the gas off the line it feels like the engine is getting no gas is is like flooding for a second

 

With the carb, you'll win highway races. With the TPI, you win stoplight to stoplight races. It's nice, but I'd stick with the carb.

 

But i still dont understand... ho do the newer camaros have more horsepower with tpi? like 235 horsepower stock compared to my camaros engine that has like 185 with the small cheap mods i did. for me to get to stock horsepower of a like 91 z would require quiet a bit of things. I just dont understand the diffrence.

 

Some items such as the cam and exhaust were upgraded along with the addition of the TPI setup. The TPI adds a lot of mid-range torque. This helps in getting the car up and moving.

Al.

 

I noticed in your profile it selfs you swapped in a 1977 z28 5.0 v8 350..... ?

Is it a 5.0 liter (305) or a 5.7 liter (350)?

Anyways, in order to make that 1977 motor a respectable motor, the heads need to go for something more stout. With the proper head/cam selection, a fuel injected motor will put a hurting on most carb motors under the same conditions, meant for the same tasks.

In other words, let's say you want an idle to 4500 RPM screamer. A stock TPI intake, with maybe a 211/219 cam, and moderately sized heads will do a great job, and better than a carb would (IN MY OPINION!) do to the "Tuned characteristics" of the powerband you want to operate in. TPI is tuned to operate in certain areas, unlike a carb that just spills fuel down a hole. Yes, stock for stock, the TPI enginmes were a lot faster because there was a lot more specifically work research for them, and they were meant to work REALLY REALLY well in 1 area, where carbs can be sized to work almost anywhere, some better than others depending on the combination, but not in any 1 area particularly well.

You can get a carb do work well, you can get TPI to work well.... I'd choose TPI.

 

the old man i buaght it from siad it was a 1977 5.0L 350. if my engine is a 1977 z28 350 does thast mean its a 5.7L or what??

 

I'm pretty sure Z28's could be had with either the 305 or the 350.... Before even tihnking abou TPI, you will need to find this out, because without that information, you have no idea what size injector you should be running, what knock sensor, etc etc etc.

5.0's = 305

5.7's = 350

There is no 5.0 350.

 

How can i figure out if its a 5.7?

 

look at your casting numbers on the block... get a pad and pen and write down every code and number and letter on that block and the location you found it and i can tell you wat the old dude sold u

 

I cant find any numbers on the block... or im just not looking in the right place.

 

www.mortec.com

Which you would have found with a decent S E A R C H.

Good luck.

 

hey its not that easy to find something you dont know exists... i had a hard time finding someplace to translate my casting numbers when i first looked.. and btw mortec sucks. not very detail but they do show u where to find the numbers

 

What engine did you have a hard time figuring out? Your 305?

 

nope my 350..... i still dont have a "sor sure" spec on a dew things to it such as: compression ratio, HP( one site say the lowest hp in an application is 200hp and then on the same page says that my engine was used in 175hp chevy c20 to 1500 apps),
i have no clue how much TQ the motor has.. so there are a few little things i dont know..


i know that i can figure out CR by disassembling the motor and taking a bunch of measurements... but i really dont want to do that.

if you are willing to help me out with some info im more than glad to post the numbers...

 

what year is your 350? Car or truck engine?

I could take a pretty decent guess for you...but the info you seek would be impossible to determine for sure unless you know what the engine came from the factory in.

I have used Haynes manuals for a lot of different f-bodies over the years and they usually have the compression ratio and HP ratings in them. If you narrow down the year and the vehicle, you would be pretty close

 

cold start injectors rule...thats why tpi is better than carb or TBI

 

umm according to the stamp on the front of the block it was used in a 75 or so c10 truck all the way up to the 1500 series truck

 

about 185-200 HP and 265-285 torque...

All of the smog 350s sucked...as for compression, check out any truck 350 from 75-86...about 8 to 1.

Suck city stock...

 

there is no smog, crap on the motor... im puttin new heads, cam, intake so.....

i needed to know the certain numbers for baselines....

 

So you only need to know what the compression was with the stock heads, right? If you are replacing all the rest anyway, then the stock pistons is the only part you are worried about...

Do you still have the stock heads?

 

i believe they are the stock heads... they are 75cc and 74cc, yes i know two diff heads.... i wanted to know the CR i have already because the Systemax II package i got calls for 10:1 compression ration

 

The stock heads and stock pistons should put you at 8.5 to 1...

You probably won't be at 10 to 1 with the stock pistons and Holley heads, because if I remember correctly, switching from a 76 cc head to a 64 cc head on a 350 would increase compression about a point.

I spoke with a friend of mine over the weekend who uses a lot of 350s from 75-86 for demo cars & trucks....he was also pretty sure about 8.5 to 1 for the compression ratio as a general figure, but the only way to tell for sure is to replace the pistons with a known quantity.

 

or measure my current ones which i really am not gunna do at this point becasue im not goiing for ultimate performance of this package.... mostly due to time constraints of my current dying motor..... later on ill do a 383 and bump the compression then

thanks anyways for the help