96vertStroker

I have tried to search but really have'nt found anything about 408 ci. LT1. Is it possible, on a street car that will see at least 100 miles a week. And if it is possible is it really something I would want to drive at least that many miles a week. Thanks for you guys' help!!

rskrause

If you search some more, you will find a number of threads about large ci LT1's. Many may be tired of (again) posting their ideas. I am. But very briefly, Anything bigger than a 383 or at most a 396 is past the "sweet spot" in terms of cost/complexity of the build versus performance. The problem is that while those bigger builds cost more, the performance is not much better due to the limitations of the available LT1 heads and intakes. IF you want to start converting Gen I stuff, it's a different ballgame. But that adds a whole 'nother level to the cost and complexity of the project.

Rich

scott9050

Maybe we need a sticky about search first, ask later? Some people honestly do not know.

mdacton

if you want anything bigger than a 383/396 then just go to a SBC.

You would be wasting time/money messing with a LT1.

Get a little M block and go from there

SStrokerAce

Short answer, yes it's possible and no you really don't want to go thru all of that for a few cubes.

Bret

95fbformula

Could always do a big cube LSX not to hard of a swap if you can do the wiring.
There is a video on ls1tech of a guy having a 454 LSX making 900FWHP spinning 8800 rpm. now that would be a big cost all race motor but it just shows the possibilities.

SStrokerAce

Robin's motor is probably worth more than 3 decent f-bodys, and with those heads, that intake and that much RPM thank god it's making 930hp!

A more realisitic version of that would be a 402 LS2 block L92 headed LS motor.

Bret

SS MPSTR

just curious, but do you know if everything fits (i.e. accessories)? I contemplated that, but was told that there might be an issue. I could not verify it with the information I had.

96vertStroker

I am still searching and I found a few things on some other sites, but it is looking tough. I was really hoping this would be possible and streetable as I would really like to exceed 400+ ci. But not giving up yet!

Injuneer

Its possible. There were a couple shops that sold "409" LT1 short and long blocks. But they stopped making them. Either no one bought them, or they had "problems". There are people who post here (or used to) that have gone to 421ci, and with sleeves to 427ci. Its just a matter of how much you want to invest in the engine, and the consensus seems to be that there is no value in using that approach, other than being "different".

1badasZ

about putting a sbc in a f body? anyone know of anyone that has done this with fuel injection. i know that route would be higher. but i guess its something to think about being that you would have alot more head and intake choices. like stated earlier can you still use the accessories from the lt1?

Injuneer

Here's a Dart Iron Eagle Gen 1 block in a 97 SS, with EFI and a blower...... 1,350 HP.

got_hp?

wow, now that is SEXY!!!

SS MPSTR

I never tire of seeing George's old car, and I see it occasionally out here now. I know the Dart block can work in a race application, but what about those of us who want to keep a good portion of the OEM accessories and what not (read: street car)?

rskrause

The Dart blocks are drilled for standard accessories. Of course, additional holes can be drilled and tapped, brackets can be fabbed, etc. It's quite possible - all you need is time, skill, and money. You can leave out the skill if you have enough of the other two.

Rich