4.3 cpi vs tbi

[Stiletto]

hi guys , i have a 92 jimmy with the cp4.3 i am gettting a 91 blazer with a 4.3 tbi either stronger? how about gas mileage ? thanks STILETTTO

[johnpsu]

the cpi 4.3l will be more powerfull. better milage to as long as it is working properly

[Stiletto]

Hi John, well that sounds like a bummer, as i am retiring my jimmy with the 4.3 cpi for a blazer w/4.3 tbi. are the mpgs even close or anyone have the ratings? hp and mpgs. i test drove a 91 jimmy with the 4.3 tbi amd thought something was wrong with it since it seemed hardly to pick up, while my jimmy can get a baby chirp at 2nd both are automatics thanks Stiletto

[BlazerLT]

TBI's have 40 less hp.

You won't be happy.

[tbischop]

4.3 CPI was approx 190HP. 4.3 TBI was approx 150HP if I recall correctly. My 93 CPI was MUCH faster than my 89 TBI. Many differences. As for fuel mileage, my 89 TBI got MUCH better mileage. It's a tossup, what are your needs? Towing anything? Highway driving? City driving? My 89 was fine in the city. On the highway, if there was any wind, the speed limit of 100KM/hr is about all you can do.

[BlazerLT]

They both get the same mileage. No different fuel consumption if they are both properly maintained.

[Stiletto]

hi and thank you much! i am short on $ and i found a 91 4 wheel drive for $900 it has 180,000 miles on it if i could find another i would i haven/t baught it yet . but tbi is still a vortech? good if not abused for 300,000 ? thanks Richard

[Stiletto]

also simply city driving and work and snow ! i get about 20 mpgs with my 92 cpi jimmy taking off nice and gentle hope the blazer 91 tbi comes close if i get it.

[BlazerLT]

it might if you tune it up, but with the less horsepower, it will be working harder for the same performance.

[jeremypittman]

I have an 89' model how do i tell what type of 4.3 ltr is in it?

thnx

[jeremypittman]

Just found the answer...


its a tbi

[BlazerLT]

92-95 were the only years that had the optional high output cpi 4.3L.

[Rick Norwood]

My 93 S-10 4.3L CPI is much stronger than my 2000 Jimmy SLE. I thought something was wrong with the Jimmy, my Stealer blamed it on the difference in the Rear-end Ratio. Now I know. Thanks. Oh BTW, the gas Milage between the two is pretty darn close.

[BlazerLT]

The dual plenum design with the CPI system really helps higher rpm torque.

[Stiletto]

thanks! well the guy who was slling me the tbi blazer hasn/t called me back so i'm still hunting for one! cpi or tbi seems not much the difference . my camaros are my race cars the soon to be blazer/jimmy is just to get through the michigan winter and work ! Most Sincerely, Stilleto