mdacton

Your wrong...... just because you have never seen it does not mean it isn't out there.

Heads are out there too...... sure its not something you can call and order and have it in 2 days.... but anything with that much power NA isn't going to be anyway.

You need to look at hp/ci and look at other combos from everywhere then you will see what is possible and that so much is left on the table.

Also good luck turinging a 4" strok small block 8500......Its going to be very high maint

Steve in Seattle

True, but my point is that I simply havn't seen anyone make that kind of power on LTx heads NA. hp follows cfm closer than CID. If you're turning 750hp you're likely pushing 380cfm... good luck getting a 23* head to do that. Doable, but not cheap, and likely a $1000+ conversion cost since it'll likely be a GenI head.

Anything's possible, but the heads will be rediculously priced and WAY out of the league of 99% of an already small LTx market. Dart will never make this block IMO... just no way it makes sense. If high flow heads were easily available it'd validate a tall deck/bigger bore design... but not the way it is.

jpack24

Sorry, but you are wrong. They will be out in a few weeks. There are already a ton of pre orders from many big shops. http://www.dartheads.com/dartboard/s...ead.php?t=1039

I am sure there will be more offered from Dart as well in the head department.

briggsbuilder

Wow looks like my turbo ls 5.3 91 camaro is going to have to wait!!! i just learned about this today and it looks like i will be keeping my 6 speed lt1

reamo04

very interesting...just when I went back to all motor

RACEON

Steve, there have been a few LT1's with autos push 500rwhp, so they were very close to 600hp at the flywheel, NA.
And that was before the newer AFR's and such. Some people have spent big bucks on heads, and manifolds to get the LTx engines to some pretty serious HP.
A 427 cubic engines wont help allot, but the new heads out can at least get you closer to 650 fwhp, dont you think with the 427 cu in LT1 potential with these new DART blocks??

Steve in Seattle

Well its good to see support for the LTx... though it won't be cheap. An SHP Dart block is over $1500... add in custom heads/intake/headers and a blower seems almost economical.

I hope it takes off, should bring in some 18*, 15*, or even 11* LTx heads down in price (or make them available).

I just have a nagging feeling this will be a "Dominion Head" product... one run... get em while you can.

mdacton

you can get a edelbrock monster head converted for an extra $400.... and the head has crazy potential. Search for raceflow development

96capricemgr

Run the numbers on Rick Abare's car through a MPH+weight=HP calculator once 141.xx mph and 3400lbs.

That is an LT1 casting. Hell run his old numbers through 138mph at 3400lbs that was with GM LT1 heads and intake.
I believe that motor only sees about 7500 since both setups peaked UNDER 7000rpms.

A 600+ fwhp 383 is easy with 23degree heads IF you are smart enough to get the folks who have been there done that to help you. Problem is this community dismisses good results and copies mediocre ones.

This has been done FOREVER on gen 1 smallblocks but guys think it is somehow impossible on a gen 2, there is not that much different between them.

Injuneer

I know for a fact that George Baxter got more than 310cfm out of his Canfield LTx heads back in 1999. I'd also guess that he had about $5,000 into them, including the custom offset Jesel shaft rockers.

jakesz28

Steve my car is a nitrous built combo. Cam, gear, converter, powerglide everything makes it a pig on motor. But this motor has went 10.50 at 130 mph on this set up. So how can you calculate that horsepwer number. I would think it is over or at least 600hp and the cam is **** for motor.

I've sprayed this thing and gone 8.957 @ 151.6 mph This cam really picks up with a bottle. I would have to say I'm only a stall and gear away from going 9.9's on motor.

<Puck>

380cfms of 18* goodness . Did not know those were edlebrock castings though, thought they were their own casts. Raceflow Development is no joke either way.

It would take tons of cash in custom parts, and be strictly drag strip only, but imagine one of those symmetrical port CFE 15* "SBX" heads on an LTX . They can make around 1,000hp all motor. Looking at them I'm not even sure if it would be possible to convert them to reverse cooling, but that would be one nasty drag car.

I'd be happy to do all the research and testing on converting different SBC race heads on LTXs if someone fronts me a few hundred grand .

**edit** They sure are Edelbrock. They come in 18* "Spicy" and 15* "Flaming Hot" flavors if anyone was wondering. http://www.raceflowdevelopment.com/R...ck-monster.htm.

Rob94hawk

I guess these 18* heads on an LTx block would be overkill for a daily driver eh?

blue 79 Z/28

anything RFD is for max potential race, nothing street.

kgkern01

As far as this block goes, I hope that Dart can make it a 1-piece main block, as a 2-piece block would require a different oil pan and flywheel assembly, and at that point the options available for say T56 cars with the stock k-member goes down as far as flywheels and oil pans are concerned. I think the ability to still use an (aftermarket of course) F-body LT1 oil pan should be retained as well as LT1 flywheel. JMO