A_VAS

iTrader: (16)

if it's a race car, then solid roller is a no-brainer in my opinion....you adjust valves very little.

PREDATOR-Z

Solid roller will require head machining, special lifters, pushrods etc......
I will stay hydraulic for what I want to do, + racing could be 1 season (who knows) and I want the option of being able to use that motor on street if it so requires later on down the road.
For the time being (as Eric K. mentionned) I want to make this the most budget minded/friendly as possible (while putting $$ where it counts most to make it work its best).
Alltogether, this car will cost me around 15>17K $ (lots of custom fabrication in my tiny cubical ), This is not counting the 1500$ I spent on that 00 Z28 (blown motor, collecting dust for 2 years in some guys back yard). Basically a roller.
For exemple I'm leaning toward a Neal Chance converter ($ well spent). Tranny will be a Reverse TH 400 with LS pattern bellhousing (no Trans Brake). Custom 3.5 inch drive shaft.
Differential is a custom Ford 8.8 with 3.55 gears or 3.70 (I'll decide that when I spec the cam).
Heads will only get a valve job and some bowl work with .003 cleaning (for Cometic).

PREDATOR-Z

Hmm, that one is a toughy. Best I have seen was some guy from Kuwait with a turbo stang running 8.6
But reliability sucks and often then cannot go through a full round to the finals.
in 06/07 I was crowned Champion, not for being the quickest but because I was the most consistant. Finished in finals in all but 1 race out of 8
I was running low 10s and some of the quickest shortimes and RTs.

briannutter

Danny Popp is running a similar combo to this in his z06 in the Nasa ST1 class. ERL block, SAM cam, fast manifold, AFR heads, Wiseco's, Callies crank, Lunati rods.--Makes an easy 560whp through the stock exhaust. Changes coming this year to tune it up a bit further.

TooLateVTEC

iTrader: (2)

Forgot to ask if its bracket or heads up racing?

Whats the deal with no trans brake? Those things are the **** !

Beaflag VonRathburg

iTrader: (176)

It sounds rather interesting for a budget combo. If I could buy ls7 heads and intake for $420 I would buy every set I could find. If you had a 6 bolt set of heads you could spray way more than you are planning. With the high compression height and large bore you could spray around 400+ on it. The rpm car is still on a 4 bolt set up if I'm not mistaken. They've recently been running insanely quickly on 275-60s.

BlackNiteWS6

iTrader: (2)

Best of luck...i love the big bore LS1's. The LS1 responds great to a bigger bore. When you think about it GM gave us a stroker from the factory. The LT1 had a 4.00" bore but a small 3.45" stroke, but GM gave us a 3.62" stroke so upping the bore to say 4.125" and keeping the 3.62" stroke its very close the 383 cid LT1 bore to stroke ratio except the LS motor revs up alot faster than a LT1 motor. I've been in a few 387cid big bore LS1's and dont let anyone tell you that a LS big bore doesn't make low end torque, or that you have to rev it high to make big torque or HP. Just cause you are adding bore doesn't mean you're giving up any low end since you are not de-stroking the motor. Everytime GM ups the cubes in their motors look what they're adding....Bore!!
And look how big the jump in power they make Throwing bore at the 3.62 stroke makes awesome power increases. Someday i plan on having my LS1 block re-sleeved to 4.125" and keeping the stock crank and maybe hitting it with my D1SC kit Best of luck on your new setup. BTW, thx again for the killer 218/224 .604/.609 113lsa +1 cam u spec'd out for me awhile back.

Den

99blancoSS

iTrader: (115)

Except in the case of the 427 where they added a 4" stroke crank as well.

PREDATOR-Z

Heads up, qualifying on 1st day (they pick 8 quickest), then next day heads up elimination.

Yeah, I had a beef with that for years, my reasoning is how's come a Manual tranny car can clutch dump at 6+K rpm and autos cannot have a transbrake?

I had a huge argument and protested (boycoted) 1 race because they would not allow parachute for 9.99 or less and I was saying safety first, records later, or safety loops for drive shaft (it is not untill a car vaulted in the air that they enforced that one).
Much politics here, son of a powerful family will get away with things, inspector is cousin of brother in law etc...
One time there was one guy running with no gas cap. I refused to race against him (finaly he borrowed one from another stang.)

anyways, what to do... it is the only track in my area

TooLateVTEC

iTrader: (2)

Holy **** man, they have some crazy **** going on over there!

Good luck on racing in that class, sounds like it would be really fun aside from the safety factors.

BlackNiteWS6

iTrader: (2)

Thats true, but if you just add a 4.00" crank to a stock bore LS1 you get a 383 cid which isn't all that impressive, but when you add the 4.125" bore look at the huge power increase.

99blancoSS

iTrader: (115)

All depends on who buids the 383 540 rwhp out of a 383 isn't to shabby

BlackNiteWS6

iTrader: (2)

^^I've never seen a 383 LS1 make anything close to 540rwhp unless it had a blower
on it. That much power is 427cid territory. Please tell me who makes a 540rwhp 383cid LS1 cause i'd buy one in a heart beat. Most 383's i've been around make 475rwhp or alittle higher, but never seen one that made 540 hp. And i haven't seen too many 383 LS1's make it out of the 11's unless the car is a stripped out race car.

JL ws-6

iTrader: (50)

Take it a step farther, 4.185 bore with a 3.75 stroke crank

BlackNiteWS6

iTrader: (2)

^^I wish someone made a 3.75 crank for the LS1 cause when i had my WS6 i wanted to
build a 400cid which pontiac used to put in the TransAm back in the day. And if someone made a 3.75 crank and install it in a 4.125" bore block that would make a 400cid motor.
But i wouldn't complain with a 427 though

PREDATOR-Z

If I was to spend $ on crank, then I would go 434 cid, but not in budget (next year)

JPH

iTrader: (2)

Looks good to me Mark, I would suggest a set of Total Seal Rings in this build. You could always offset grind the crank for a little added stroke, but scarfice some strength though.

PREDATOR-Z

I was going to get Hellfires, why Total Seals?

JL ws-6

iTrader: (50)

Easier on the cylinder walls.

Even with a stock crank, I'd still go with the 4.185 bore. Then your options for heads are a TON better, and will work alot better with the high rpm setup you'll have.

PREDATOR-Z

See JL
I already have crank, rods, heads (with rockers) and intake (LS7), so I'm working around those.