Shagwell

Around here, 990's are actually very easy to come by, as are the rods and pistons.

For a BBC combo for what Fast is wanting to do with the car, I would actually use the early-mid 70's(don't remember the casting # off hand) oval ports anyway, with typical bowl blending and raising the exhaust ports a little they're 500hp capable NA, and bbc + oval ports is the obvious torque champion.

Sticking with the steep gear to be somewhat highway/street freindly with the 3-speed, it's going to be tough for an na LS platform to beat the torque of a mild BBC, though that torque and extra wheel speed will need the suspension and converter to work well together to get it done(I'm thinking he can sort the converter out).

I still say either combo could be done very comparitively, and thus I would go with which ever I found the better deal($) on at the time I wanted to get started on it. - If I didn't go boosted, either combo would have to have a wiff of some happy gas though. To cheap and easy not to.

Fast 383

iTrader: (2)

You pretty muched nailed it. I'm going to sit on this car until the smoke clears with all the other stuff going on right now. ( trying to buy new house(2 car garage), kids, new T-type for the Summer, etc...)
When I get into a position to pull the trigger on a motor it's probably going to be the 6.0 carbed or a BBC. Either way i'm going to be on the budget road. If I see a complete 6.0 for a good price i'll snag it. If someones selling(or my buddy comes through) with a semi complete BBC it's mine. I think the headers will be much cheaper to get ahold of for the BBC and the 6.0 intake and carb and box is going to set me back another $1k or so.

Realisticly, I will need to consider the rest of the chassis and the use for the car. It does have the 3.50 gears and 3 speed trans. I will need to drive a few miles, jump on the highway and head straight to the track. 45 min drive straight there. I don't really care about the gas milage even though the 6L will probably shine there. However, it will fall short with the gears. I'll have to run a much looser converter to compensate and that will hurt the driveability on the freeway trip.

The BBC will be a torque monster and have tons of low end grunt so I can run a tight converter with the 3.50 gears and it will be fine.

Either motor can make the 480HP - 520HP that I would be happy with. That would put the car in the 10's on motor and a little hit would take care of the rest.

In the mean time. The car is tucked away in the garage. I am finishing up the interior (it's all new) and spent a whole night claybarring the whole car. Feels like glass.

The only other thing I want to add to this car is a Tubular K-member and front suspension but I guess I have to wait until I figure out what the heck i'm doing!!

Shagwell

^^^ good plan

If you get a loose moment, shoot me a PM on a converter. Looking for a 5k ish stall with the n2o behind a 580ish ci BBC; I'd imagine a 9.5" with a billet/forged case. Obviously, th400, probably a 4.10 gear, 2800-3k race weight. - Don't need to nail anything down right now, just an idea of the $.

Thanks,
- Jp

Fast 383

iTrader: (2)

2 big questions. How much horsepower on motor and how much spray?

That motor can make anywhere from 850Hp to 1000Hp i'm assuming. As you know, more power = more converter stall speed. If you were going to use a 9 inch it would have to be tight to achieve 5k. If it's a big power motor and your spraying 300+ you will most likely need the 10 inch. When you say 9.5 you may be thinking of a 245mm core? I only use those for lighter horsepower stuff and streetable applications. Thats what I put in
MW66Novas car. Probably not the route I would take in a high HP NOS BBC though. It would work if you didn't want to invest a lot of money. I can sell you that for $700 bux. It would have the cast investment front cover and all the good stuff.

What I would want to put in there would be a "Super 8" which is the better Toyota core used in 800 - 1200 HP applications where efficiency is key. That will have a steel 17 blade stator, furnaced brazed turbine and pump, Forged steel cover, etc.. I'll PM you a price.

Shagwell

Probably 850 ish hp on nuts, the first kit will be atleast 250-300, and the second kit will be bigger.

Our blower converter(which I've been running with the little spray combo) was called a 9.5", but being a billet rear cover I have no clue what they started with to get that figure. - It only goes about 2900-3k on the brake and flashes 4k or maybe a little more; considerably less than ideal for the nitrous combo, but it's built for 2k + hp, not 1k-1200, nor the 1500ish the new n2o motor should be making. It's a spragless which I've been very happy with, it's just not well suited to this combo. Need to get it up a little more and get it to leave better.

Better be one bad-a$$ 8" for me not to drive over it. Most guys are running a 9-10, but I'm no converter genious.

Fast 383

iTrader: (2)

No, a Super 8 is a 9 inch race converter. But hearing your combo, A 9 inch isn't going to contain that seconed kit. The tightest 9 inch will show you about 470-4800 on motor. As soon as that sees 300Hp it will be 5800. The seconed kit will be another 1000Rpm's if it's at least 300HP. It's a lot of converter stall speed for the seconed half of the track for sure.

The Lower stall converter your running is probably a 258 or 265 core which is what youll need to get that stall speed to about 4100-4300 on the transbrake. That will leave enough room for an addition of about 600+ HP worth of NOS.

I would use a 10" . You may also be able to loosen up your current converter to achieve that stall speed as well for $225.

Shagwell

Thanks for the info. - Not touching the current converter, as it is for the blower combo, but when the time comes I will get a converter better suited for the n2o combo and just swap them with the motors.

We're setting it up for both the blown and the spray combos, pending which class we're running.

Fast 383

iTrader: (2)

Sounds good. You would be surprised at how many of my customers have a few options in the garage. Thats what keeps us in buisness. Good luck.

Fast 383

iTrader: (2)

back up


What kind of power can be made with a budget 5.3L? I mean good cam, victor Jr, carb and long tubes? 400? 450?

How hard are the Spohn LSX motor mounts to install? If I cut off the old ones.

I searched and found some info but no specific discussions.


I found a 5.3L local to me for like $400.

xpndbl3

iTrader: (5)

so basically you want to make "good" power out of a motor that will cost the exact same as a brand new cam.....?

mw66nova

iTrader: (13)

spohn lsx swap mount pads are bolt on easy.

a mid 22x's cam in an otherwise stock 5.3 can make 375fwhp. a budget set of cylinder heads and a mid 23x's cam could probably do 400+ fwhp without too much issues.

i'd really like you to see the awesomeness that is the lsx platform

steve, get in the shop!

Fast 383

iTrader: (2)

Just kicking ideas. My budget seems to go down daily and now i'm sharing it with another car. I was thinking that just using the 5.3 will get the car together and set the car up to go bigger and better LS in the future. I'll have the headers, intake carb etc...
I'm not worried about how fast it is right now just want to move foward and get out of idle.

Didn't you run a 5.3 at first Matt?? Is there certain ones that you have to use? And certain ones not to use?


http://cgi.ebay.com/ebaymotors/2000-...Q5fAccessories

mw66nova

iTrader: (13)

nope, i started with an ls1. i have a stock 4.8l that i used for a spare, but when i put it in the car, it spit out a cam bearing, lol. so it was only in the car for like a week. then out it came in favor of the 6.0l.

ZONES89RS

iTrader: (2)

I have all the threads here on my TA build with a 5.3. They go about 350 RWHP with stock heads and cam with good exhaust. That is with a 243 or 317 head, some have hit the 400 RWHP mark, but that was with aftermarket heads and all the expensive parts to make it push that hard.

https://www.thirdgen.org/forums/orga...a-project.html

https://www.thirdgen.org/forums/ltx-...t-ls-swap.html



There is allot of dyno info from the truck guys, i am really going to see what a 5.3 can do on motor and a shot of gas before the turbo goes on, will be fun but on the lacking side from the 6.0 on motor:

You can dig through here to see what the trucks put down with mild to wild combos:

http://www.performancetrucks.net/for...d.php?t=348390

xpndbl3

iTrader: (5)

trust me, been living in there lately

brandoz28

iTrader: (1)

yes, a magazine article, but it'll give you an idea
they got over 425 with a cam swap
http://www.carcraft.com/techarticles...ine/index.html

Fast 383

iTrader: (2)

Well. my new motor is on it's way to me. It's neither of what I wanted and probably won't be to fast. I'm not gonna get to run with the LS crowd this year and won't be able to make the leap to the Rat community either.

I bartered a bunch of parts I had around to build a T-350 and kicked up $125. I also spen about $100 in delivery fees.

The motor is a freshly rebuilt 400 SBC that is .020 over. It has a cast Scat crank, Forged Ibeam rods and speed pro pistons. Everything is new in it. He even kicked in a Team G intake to go with it. The cam is a Mech Flat tappett.
249-251 @.050 and .540 lift. 106 lobe sep.


I realize that I could probably make 450-500 with this and spray a 150 at it. But being that i plan on going the budget route I don't know whats going to happen.

Worst part is I gave away my 2210's, sold my exhaust and gave away my fuel system.

Fast 383

iTrader: (2)

Anyone know where compression would end up with this

pistons are flat top 4 valve relief.

How much with 64 CC and how much with 72 CC? Just looking for the basic numbers.

mw66nova

iTrader: (13)

assuming these pistons with a .000 deck height and an .041" compressed head gasket:
http://www.summitracing.com/parts/SLP-WH616CP20/

i get 404.82 CID and 10.52:1 SCR with a 72cc combustion chamber, and 11.49:1 SCR with a 64cc combustion chamber

couple that combo up with a decent flowing ~215cc intake runner head and you could easily be back in the bottom 11's or better

Shagwell

I happen to have the 200cc topline aluminums off my old street combo.......64cc cnc chambers, angle plug, manley street master valves, Comp dual roller springs with comp moly retainers, comp guid plates, arp screw-in studs........even have the port matched team-g.......

just saying

Fast 383

iTrader: (2)

Maybe to much compression for pump gas? But i'm interested. I have to rebuild my funds right now but whats the value of that stuff?

Orr89RocZ

iTrader: (20)

It should run on pump 93 at 11.5 to 1. Keep it cool and run step colder plugs and big cam

Fast 383

iTrader: (2)

11.5 and pump gas? that sounds kind of high to me.

Orr89RocZ

iTrader: (20)

Its high but possible if the cam is big enough to lower dynamic compression down. Dynamic isnt the end all say all number but it helps. There is a 640hp 406 pump gas motor on chevelles.com that runs on 91 oct. Its at 11.5 to 1 compression. Its got a huge hydraulic roller in it. 254/254 .640" lift. Thats bigger than alot of solid rollers guys run

Fast 383

iTrader: (2)

The cam in it is a

248/251 with a .540 lift or more if I use 1.6's. It's a Solid flat tappett.


Also, this block has what seems to be common hairline cracks in the deck surface where the heads bolt on. the cracks are between the middle bolts and large upper coolant holes. It may play a part on how much compression I add to this thing.

Shagwell

My exact calculated compression with the 355 was 10.989:1, and I ran it on 93 pump swill with 34* total timing. Drove the car everyday, had a/c, sat in Orlando traffic during rush hour, made trips to the beaches, down home to Ft Myers, etc,etc, no problems. I always wished I had put just a touch more compression in it as it was, would have helped the low-end power a bit more though it cruised in OD @ 2k no problems. Cam was a hyd roller, 242/248 @ .050, .567/.585, team-g & 750 holley. - They have maybe 5-10k miles on them since new with a 5-angle job, guides/etc are still in great shape, doubt I'd even bump the valves to put them back on anything.

What can you do on a converter for my n2o combo? 582ci, two "hefty" guns, roughly 3k lbs, 'glide...........................................



















NOT!









hehehe -> 3-speed. I'd be interested in a trade....


I might even have some loose 1.6 roller rockers laying around too.

Fast 383

iTrader: (2)

*I smell a barter*




I will PM you later