454 gen v

[Argent Mons]

Hello everyone. Does anyone have any experience with a 1990 454 gen v engine in their squarebody?
i have that engine i have been debating on switching it with the 305 i have currently in my 1974 c10. it currently have a tko 600 from american powertrain. ive been wondering about hp and mpg i want to add an fitech fuel injection to it with a dual plane intake.

 

[Charlie]

 

[Paladin]

Welcome from Wichita Falls! Put the Big Block in it and you will wonder why you took so long to do so! Once you go BB you'll never go back!

 

[bucket]

'90 should still be Mark IV. Gen V came out for the '91 model year.

 

[1973c10]

Welcome aboard
Go Big block and never look back

 

[mgarland]

No replacement for displacement!!!
Mark

 

[DirtyDYT]

No experience with Gen V’s but I can report that a carbed Gen IV 454 will be a very big upgrade from the 305. It’s got 49.2% more cubes!

To give an idea of the performance of a first year Gen V we can look at the 1991 Chevy 1500 454SS. It got 9 city and 12 highway mpg’s for a combined rating of 10 mpg. Its first year Gen V big block sported 255 hp at 4000 RPM and 410 lbft at 2400 RPM. This was transmitted through a 4.10 ratio rear axle and 4L80E four speed electronic overdrive transmission. I think 0-60 was 7.6s and 1/4 mile was 15.6 in the upper 80 mph’s. It would seem that the Gen V in its stock form was not much faster or more powerful than its carburated bretheren.

 

[bucket]

There really was zero performance gain with the Gen V, most of the changes were for improved reliability.

 

[shiftpro]

It's a strong block but with the heads they will never produce any reasonable power.

 

[Shorty81]

My 496 with 781 heads gets better mileage than in it's 454 setup.