572 GM Crate? Anyone done it?

[slowboi]

Hello,

I will be restoring my 1986 GN over the winter and in the spring I will be deciding on whether to build the 3.8 or maybe go LSX. When I was doing some research I came across the GM 572 and I am more than interested in the relyability it gives in its pump gas version.

Just wondering if anyone has given this some thought or if anyone has done it? Thanks.

 

[usetaboost]

the turbo 3.8 is what makes these cars unique. I'd just get a nice n/a car for a few grand and drop a big block in it-done.

 

[chopped39]

The lsx will whoop the 572 if done right. I would just put the v6 in it and keep it original.

 

[Squid4life]

Your car, but you asked... V6. Otherwise it is a sin against humanity!

If you HAD to do something other than the 3.8, go LS. Its less of a sin against humanity than the 572...

 

[GetOwnedVette]

Had a few BBC Gn's.....It doesn't even feel right driving them. Get a Turbo 6

 

[charlief1]

You could always go with a Series II engine. There a very long thread in the general section about doing exactly this. It's basically a poor mans Stage II engine and you can still get them cheap. If I remember right he's gotten into the low 10's or high 9's with it already so it's the perfect inexpensive set up.

 

[novaderrik]

there aren't too many turbocharged BuickV6 engines out there that make more power and torque than even the "mild" 650hp 572.. but you also have to remember that the 572 is a tall deck block and it will be fun finding headers for a G body.. also, it's heavy- the tall deck big block is probably 100 pounds heavier than a regular big block- which is itself probably 300 pounds heavier than a Buick V6...

 

[bogies87]

the turbo 3.8 is what makes these cars unique. I'd just get a nice n/a car for a few grand and drop a big block in it-done.

This is a great statement. It's not the point whether or not the big block or V8 makes more power. It's that these cars make monster power out of a V6. But the Turbo 3.8 IS what makes these cars unique.

 

[SHADOWII]

It's "ok" to swap a v-8 in a regal, they come w/v-8's. But you betray the "spirit" of the "TR/GN" when transplanting a V-any-other-thing into the TR. Consider, if you will, the diversity of v-8 powered cars, ie, cobra"s, camaro's, nova's etc. that have fallen to the lil' v-6. What's the first thing out of the mouth of the vancqished? I've been beaten by a V-6!!!! I CAN'T BELIEVE IT!!!!!
On the other hand, if you are running an ls-1, 572, 383, etc. What do the vancquished say? Oh he's running an ls, it's no wonder he beat me, or a 572, or a stroker 383, etc. Those statements detract from your victory and your opponent doesn't feel the "sting of defeat", at the hands of the "mighty V-6." Honor the legacy of the 86/87, "...it was the quickest production car out of detroit, beating, even Cheverlot's flag-ship, the renown Corvette!"
Therefore, I must ask you to reconsider these "wicked" thoughts and opt for another 109, 484, 291, series II, T/A, or a stage II and keep true to the TR's heritage.
A v-8 powered gn is not even considered a clone. Remember when an misinformed young man comes up to you and says,"I heard the gn came with twin turbo's on a v-8 and was used as an FBI car". It was obvious he knew nothing about a TR but hear-say.

 

[slowboi]

So im guessing no one has done the 572.....
Im a little curious why people figure the lsx isnt " a sin against buick-kind" and the 572 is....?

I am still on the fence as to what Im going to do, whatever I do I dont want to do it twice so Im exploring all options.

 

[SHADOWII]

So im guessing no one has done the 572.....
Im a little curious why people figure the lsx isnt " a sin against buick-kind" and the 572 is....?

I am still on the fence as to what Im going to do, whatever I do I dont want to do it twice so Im exploring all options.

I included the lsx, as has those who have opted for the lsx swap, "used to" consider it a "sin". But we are trying to do w/this engine what the designers never considered. Especially in the 80's when the heavy hand of "big brother" was against the auto industry. Remember, it's your car and your decission and yes we do understand the reason for the choices made. Cost, durability, blown h/gaskets, etc............even if we may treat you like an israelite slave during the building of the pyramids! lol j/k!

 

[charlief1]

So im guessing no one has done the 572.....
Im a little curious why people figure the lsx isnt " a sin against buick-kind" and the 572 is....?

I am still on the fence as to what Im going to do, whatever I do I dont want to do it twice so Im exploring all options.

It's your car so do what you want, but remember, if you add a V8 the value of the car will go down. One thing on the LSX based engines. The heads are the same ones that Buick engineers (basically) designed for nascar that bolted on to a small block. Those didn't even make it 1 year before they got outlawed for making to much power.

 

[Howling Mad]

If you put any v8 in it you need to take off all the grand national emblems and through out the gn/turbo 6 interior.

 

[HelloBozos]

It's your gas milage not mine...heheh

 

[novaderrik]

It's your car so do what you want, but remember, if you add a V8 the value of the car will go down. One thing on the LSX based engines. The heads are the same ones that Buick engineers (basically) designed for nascar that bolted on to a small block. Those didn't even make it 1 year before they got outlawed for making to much power.

which "Buick" NASCAR small block heads are you talking about?
the valve angles and chamber shape of the early LS heads is kinda sorta similar to the Buick V8 of the 60's and 70's, but i've never heard of a "Buick" head for the small block Chevy.. they did cast a "Pontiac" logo into some heads in the 80's and 90's- and GM still sells the cast aluminum valve covers that say "PONTIAC" on them- but i can't say i've ever heard of anything like that with a Buick..

 

[Howling Mad]

The gm nascar motors were all Chevy blocks but Chevy Buick and Pontiac all used there own head design from my understanding.

 

[trixdout]

If you put any v8 in it you need to take off all the grand national emblems and through out the gn/turbo 6 interior.

This 200%. It no longer will be a Grand National. More like a Grand Failure. Don't bother with the 572. Build a Stage II or whatever v6 (that is related to these pieces of history) and turbo the ever living shit out of it and smoke all 572's on a daily basis. Stick to the cars roots, not to the general fas with muscle cars nowadays.

 

[novaderrik]

you purists are funny..

 

[charlief1]

The gm nascar motors were all Chevy blocks but Chevy Buick and Pontiac all used there own head design from my understanding.

You forgot the olds heads in there. The Buick heads got killed in the first year because they were symetrical design with a high roof intake port like the current LS heads. You see them pop up from time to time on evilbay in the race parts, but not very often.

 

[forcefed3.8's]

You forgot the olds heads in there. The Buick heads got killed in the first year because they were symetrical design with a high roof intake port like the current LS heads. You see them pop up from time to time on evilbay in the race parts, but not very often.

They look just like stage 2 v6 heads with an extra cylinder and SBC 5 bolt pattern.