what kind of power would oi be lookin at with a stock l05 bottom end and vortec heads and a lt1 camshaft or one with similiar size? and would i run into any problems with this setup?

 

I'd guess you'd make 210-220 hp to the wheels, that is after a good tune.
You should beable to get it to run pretty good, you'll need a way of adjusting the fuel pressure up or down, & a tune through the ecm will help.

 

Why the LT1 cam? You can go much bigger.

 

LTs,xstream k&n assmebly,custom tune,high flow cat,mtc-1,ported 193 heads,port matched intake 50mm TB and made 255hp to the wheels with 343tq so i would say with vortec on this same setup probably 265-275hp with 360-370 ftlbs.It would probably be more if you have true dual by i ran a single exhaust.Lts into a flowmast y collector.I have the dyno sheet and track time around here somewhere i ran it last month if i remeber right it ran a 14.52@96mph not to bad for stock tires with a little bit of wheel spin.trans had a shift kit and some weight reduction.

 

you have supplied the upmost of helpful info FOR ME if not anyone else i am looking to do a similar build to my 350 before dropping it in my bird. but i have a couple questions about the info you have provided..
1) what is LTs?
2) what is mtc-1?
3) what would the est. power rating be of your setup BEFORE a tune? no place around here that does it

i plan to get my vortec heads out of a 96+ 350 *IF* that helps any. also,
my 350 is fully stock out of a 92 caprice with the roller cam. trying to provide info that may help.

 

Lts=Long tube headers.MTC-1 Is the cam i used.before the tune probably around 235-240.

 

ok well what combination would you guys suggest for making over 300 hp? i would like to use vortecs because they are cheap and easily available.

 

http://www.carcraft.com/techarticles...d/viewall.html

 

its a 350 not 305

 

Awesome. Is that to the wheels or crank? If was to go to carb, would I still have to tune? I really DO NOT want to go carb but tuning will be a drag seeing as I'm always searching for more/better stuff. Would love to keep my tbi. And saw a set of 90' z71 350 vortec heads for $100. Guy said the bottom end was messed up on it (crank broke and stuff like that). Sound to be a good deal?

 

It was to give you an idea if a 305 could squeeze out 325HP at the flywheel what do you think a 350 Vortec could possibly do at the flywheel on a budget. Well here is a budget build for you.

447 HP Vortec Small-Block Build - Budget Sledgehammer

Read more: http://www.popularhotrodding.com/eng...#ixzz1bX1CyKe4

 

If it's a roller block i would on a budget do this:

Reuse as much of the stock valvetrain as you can. Run an LT4 Hotcam on 1.5 rockers. Use LS3 Yellow springs and comp beehive retainers (I dont know if the LS3 retainers will work)

With stock Vortec heads and an intake/induction and an exhaust setup that can flow what the heads/cam can flow, you should be making around 330rwhp. That's the number I tended to see with this combo, as it's been done many times.

If you've got more money go with the biggest roller cam you can find below around .520 lift to be safe with the beehive springs. The beehive retainers greatly increase your retainer to guide clearance. The XR276 cam seems to be good for around 350-370 rwhp. 26918 beehive springs in vortecs can pull it off.

What kind of intake/induction are you planning on running? These rwhp numbers are assuming a non-restrictive exhaust and intake.

Some assumptions:

64CC chambers
Flat top 5cc Pistons with a 1.560 pin height (so as to be only .025 in the hole, instead of .045)
.040 quench - get a headgasket to achieve this
With 5.7 rods and a 3.48 stroke crank, you'll get just over 10:1 compression with that setup, which can support a pretty large cam.

If you have to run TBI or TPI or 2.73 gears or something like that, you may want to lower the SCR a little and run small dish pistons...10cc dish or something.

You can run fairly large cams with that setup and still keep a reasonable DCR. Up into the 230's @ .050 at least, which is about as high as you'll want to go for anything street driven to be able to cruise at a reasonable RPM on the highway.

IF you're on a SUPER tight budget like me, the LS3 springs have numbers pretty close to what the beefier flat tappet cams need. An xe268 or xe274 can run the LS3 springs pretty well but Comp may not approve of you using anything but their springs. The Lunati tech I spoke to said the LS3 springs would work great for their 60103 cam in my setup which is very close to what you're proposing.

With my tiny xe262 flat tappet cam I'm putting right at 300 to the wheels judging by the calcs I've made, and I've gotten the car tuned much better since then so maybe more. But I'm rnning a 650cfm Holley through a Performer RPM intake and Long Tube headers.

It will be a good idea to either pin the studs on the vortec heads or get screw in studs installed.

 

thanks alot. ill be using a 454 tbi unit for induction and maybe a rpm manifold with adapter.also a t56 with either 3.73 or 4.10 gears. maybe longtubes but idk if ill have the ground clearence so maybe shorties and y pipe

 

If you're running a T56 you can fab up a double hump crossmember and run duals easy. Theres room on either side of the transmission to run exhaust pipes easy inside the trans tunnel. Not saying you should, just saying you could.

My car:

 

wasnt there a company that made a t56 crossmember that you could duals with?

 

Mine is from Skulte, they closed up shop, though. Or went to focus on corvettes. Not sure, but he ditched our crowd.

Hawks makes one too, though, but it's not as nice.

http://www.hawksthirdgenparts.com/tr...t566speed.aspx



Skulte:



Seems like there are people complaining about teh hawks piece not fitting correctly here: https://www.thirdgen.org/forums/ltx-...smember-2.html

Hopefulyl if you get around to buying one they will have the issue addressed.

 

ok and can i still run a set of bmr or similiar sfc's with this crosmember?

 

I dont see why you couldnt. BMR and UMI sfcs are perimeter design.

 

ok good.just makin sure

 

Im running spohn SFC's. Regular perimeter SFC's. You can see them in the first picture I posted, and you can see the bars gonig to the frame rails in the picture of the crossmember.

 

i see thanks alot man