Ok. i was just wondering if i could get a solid opinion on what my plans would run, since im new to this stuff.


first, i Don't have a car yet. Ive had a few F-bodies but they weren't what i needed for my build.

now then:

L98 taken out to 383
fully forged (eagle or scat?) rotating assy
flat top 10.5:1 (i think)
Some kind of low RPM Crower grind. or maybe Lunati. 1500-5600 RPM maybe?
fresh valvetrain. beefed up etc etc, 1.5 rockers
GMPP Fast-Burn Cylinder Heads
FIRST Fuel injection intake (Vortec version) http://tinyurl.com/67evoe
Custom CIA
Dyno Don's Headers to single (maybe dual) high flow cats
3in Hooker catback
3.73 gears
very minor lightening. still has to be a comfortable car.
edit: oh and we'll say manual transmission
Hardtop
SFC's


So can anyone give me a quick run down of how this setup should work, and if there is one, whats the big weak spot that would need addressed???

Thanks alot guys and im sorry for my ignorance! This is my first engine!
~LMSkyliner

 

if this is mostly a street car (what it sounds like)

i would
-build a cheap 383. cast crank, I-beam rods, whatever pistons will get you up to around 10.5:1 compression. you do not need a forged shortblock, and you can spend the saved money where its really needed.
-heads. get some ~180-190cc aluminum heads, and if you can afford it, get them ported by someplace GOOD. like Advanced Induction or TEA.
-hydro roller cam in the 224-228 duration range.... .550-.570ish lift. 110-112lsa.
-stealthram or miniram intake. do not waste your time with the tpi.
-52-58mm tb
-13/4" longtubes

this combo should be good for around 400 at the wheels or a little more.

 

i expected as much.


the forged internals is because i dont ever want to worry about it, and i want to be free to spray the snot out of it if i get bored.

the TPI-esk intake is because i love the torque and the look and the RPM band (low)

also, i put the wrong cam up, i have it changed to just a crower cam now.

porting will be done by a local shop im connected to.


perhaps i shoulda been alittle clearer that im looking for a torqy (spelling?), low-mid RPM monster that i will never even be able to break (i hate worrying)

~LMSkyliner

 

you wouldnt ever break the motor i suggested unless your planning on a 250+ shot.

 

ok..


still, one thing that is i cannot do on your setup is the longtubes. Im in Pittsburgh and they will scrape on everything.

 

been running longtubes on my lowered 4th gen for 8 years now. but, if you dont want to run those, shorties should work o.k.

tpi intake- would choke that 383 by 4500rpms or some junk. would make no sense to build a forged shortblock on a motor that will never see the high side of 6000rpms.
heads- i do not trust any local shops, save for maybe a valve job.

 

did you even look at the site? thats not a normal TPI. plus i was planning to have it ported for abit more RPM.


and as for the shop, i know them quite well and they do fine work. They build engines for people all over the United States last time i checked.

 

forgot to answer original question. ill say it would run mid to low 13's. high 12's on a sticky tire.

my suggestions would be good for mid 11's on a sticky tire and the right converter.

 

that combo should be a good deal faster than that.

and as for your combo, i know what your combo will do because half the people on the boards do somthing similar. Im sorry but i want somthing different and i dont want the power to come in as high as those intakes have it. Drag racing is just for fun as far as im concerned, and i will have this car road racing more than drag racing. Plus i will be on the streets the most, and when will i need that mid-high RPM power on the streets?


i will be more than happy to consider a lower RPM build, but what you have right there is somthing i don't want to do and argueing that it is better is not going to change my mind. Im not a professional drag racer, i just wanted to know what i could do to help out my build alittle bit. I have no interest in doing what everyone else is doing just because its the conventional method.

~LMSkyliner

 

im not trying to argue, i just think you should reconsider what your trying to do. why are you so against turning some rpm? thats how you make power, ya know?
a 383 with mild heads, tpi intake (however modified, still has long runners), and limited to 5600 rpms TOPS.... i dont see it making any more than 320-340 at the wheels. it will be about as quick as a stock LS1 car, imo.

turn some rpms with it and you can make some power. cant do much with that intake and heads though. and your bottom end torque will not be an issue whatsoever. tire spin will.

anyways, not trying to rile your feathers, just trying to help out your thinking.

 

Ok thank you! This is the kind of "tone" i was looking for! Im sorry for being rude, but i was getting a bad vibe like "i know what im doing and you don't so do this" before.

Now then. I remember someone on this board ported the f*** out of the FIRST system and i thought that it would handle some good power. i can't remember who it is but i'll go look after I finish this post. Also on the site it says it supports ~600 HP if i remember right. So i figured it would be fine, also there is that engine on there making 420 odd HP, so i was hoping some intake porting and some head work with the right cam will make a good 450 or more. But if that's not right, i'm open to being corrected (nicly).


also, what would be some better heads? I just went with the GM stuff cause i get a discount. Better suggestions?


thanks man!
~LMSkyliner

 

Start with a Dart little M and a set of these... part # 24502580 from GMPP

I'm J/k I'm the last person who should be offering advice probably.

 

some afr eliminator 180 or 195's right out of the box would work great.
(personally, i'd probably get the 195s for the 383)

i would run a cam in the 228ish duration area for the street car. do a search for "hotcam" sound vids over at camaroz28.com for an LT1 car. thats pretty much what it would sound like in your 383. prob. make peak power around 6k.

if those tpi intakes will indeed handle up to 600hp, the runners must be pretty dang big cross-sectional wise. you could try it, but chances are you could still make more power with just a miniram/stealthram.


383+280cfm heads+228dur. hydro roller+good intake = 400-430rwhp. add 10-15% to that to figure the flywheel hp....

 

yes the runners on the FIRST system are bigger stock than a fully ported, siamesed regular TPI if i remember right, and you can port the FIRST system to some huge number or somthing.

What about an LT1 intake? I found a torched LT1 in the junkyard yesterday. The engine looks good though, the wiring is just melted all over the intake. They dont know if it runs ( i think its fine) so i can have the engine and tranny for $250. Think i should bite?

 

$250 for an LT1/trans would be a STEAL. if you could get that, i would put that motor in the car. just get a heads/cam package from advanced induction. at the most rebuild the shortblock with new rings and bearings.

 

Thats what i was thinking. I mean, even if it needs rebuild and rewired because of fire damage, its still worth it. I really think it would be ok, but like i said, im not sure because the fire was right near the back of the engine, and its still under the dash so i cant see. Still should be worth dropping it out to check though i think???