LT1 Heads

[Formula408]

Is Dart going to make an LT1 head larger than the 180's that are out now? I would sure like a set of 230s for my 408 LT1. What kind of flow numbers are the 180s capable of and what kind of potential do they have? anyone know?

[BIG CHIEF]

Unfortunately at this time is hasn’t been discussed to produce something larger. The 180 cc Lt-1 / Lt-4 head is a pretty efficient little head.

Here are the Wet flow numbers:

.200 134 / 114

.300 187 / 145

.400 231 / 164

.500 257 / 172

.600 261 / 174

[Formula408]

Can you tell me if those heads require the use of the LT4 intake or if I am ok with the stock LT1 intake?

[malihoochie]

Those heads will work with both the LT1 & LT4 intakes. They are tall enough for the LT4 and have both intake gasket "tab" holes for either gasket to be used.

[kcaraway]

i have a 93 LT 1 and im qurious how u made a 408 out of it? and how does it run? is it on pump gas? thanx

[Awesome Bill]

i have a 93 LT 1 and im qurious how u made a 408 out of it? and how does it run? is it on pump gas? thanx

you put a 4" crank into it.

[kcaraway]

thanx i bet it turns out pretty good. i have a 502 marine engine in my nova and was wondering will that block make a 572? want to keep it on pump gas so it should be ok dont you think? if it wont go to a 572 how big will it go?

[Awesome Bill]

thanx i bet it turns out pretty good. i have a 502 marine engine in my nova and was wondering will that block make a 572? want to keep it on pump gas so it should be ok dont you think? if it wont go to a 572 how big will it go?

Yeah, the 4.5 bore with a 4.5" crank goes right into it and they make shelf pistons for the 6.385" rod. The rod ratio is still good @ a 1.418888888 and we have done very well with the. I have used some GM blocks that I did not have to touch with a steel rod. Works for me. But for the answer, a 4.5" crank will go into your block to make the 572! Fact