all i want is low 13's this is what i got:
5.71990iroc 700r4disc/disc

-383 rebuild (everything new except block,crank,bare heads)
-micropolished crank
-keith black pistons
-9:1 compression
-rebuilt heads 1.94/1.64
-comp cams 206/212 480/487
-msd 6a,blaster2coil,timing controlbox,8.5 superconductor wires
-slp 13/4 headers,dual cats,magnaflow catback
-custom cai
-k&n filtr
-super ram
-30lb injectors accel
-58 mm throttle body bbk
-b&m transpak
-eaton limited slip diff
-3.73
-eibach 1.5in drop springs
-hotchkis adj pan hard rod & control arms
i still dont have a torque converter and need recomendations.
also was wondering if 3.73 rear is too much for this combo(still havent installed gears)i want to go fast on freeway too

 

I don't think you'll need the 3.73's, you should be fine with the 3.23's (I assume?) that are in the rear now.

Not sure you need the 30lb injectors either for your combo, unless maybe you plan on a power adder later?

 

lol that setup is gonna do u more then 13s man. u dont even have to rip into the engine to get what u want outta that thing. theres a guy on here name Nick, (customX) stock heads and cam on a 90 IROC 5.7L. Prom tuning, a moded 700R4, a stall converter, stock 3.27 gears, siamesed SLP runners. he runs 83-84mph in the 1/8 mile which is 103-104 at the end of the track. low thirteens u bet.

 

Leave out the 3.73s. Also, it is going to be about traction. Just get some good tires and you will run at low 13s @103 or so in the 1/4. The stock heads will hold you back IMO. I seriously doubt you will need 30 lb injectors or the 58mm TB. Save that money for heads.

 

thank alot ,i really appreciate it
what torque converter would be good with this combo?

 

That cam is pretty weak too

 

Ditto

 

I think the cam is matched well enough for the 083 heads and CR he's running, should give him a stout, street friendly, fuel efficient engine, that runs in the 13's, with minimal eprom tweeking, depending on the injectors he goes with.

Sure, if he was running some large flowing heads, higher CR and trying to make a lot of HP, then he'd want more cam, but not everyone is looking for low 12's in their daily driver.

 

The cam may be matched to the heads and compression, but the 383 isn't matched the cam/heads.

 

PLANT PROTECTION The cam may be matched to the heads and compression, but the 383 isn't matched the cam/heads.


what do u mean?

 

You should definitely be running a more aggressive cam. That cam isn't much different than some stock cams.

 

Meaning as an absolute minimum, on a 383, you need to run the LT4 HOT cam. The bigger displacement engine will help keep the HOT cam acting pretty mild (more so than in a 350), but the horsepower will be incredible. Also, those heads are a bottleneck for a 383. It'll run out of breath and lose its potential at around 4500 rpm.

 

A 383 won't just want better heads/cam, it almost needs it. The cam is pretty small for really any sbc. The heads have say 160cc intake ports feeding about 180/140cfm at peak flow in stock form at least. Id say run a 350 minus the 58mm TB and 30lb injectors and pick up a set of small port dart or pro topline heads. Id say you should be good for mid 13 passes even with that cam.

EDIT: lol, this always happens to me. But as you can see, pro-tour and I are both saying the same thing.

 

hell, if you want to run high 12's and save some money, build a 355ci (save money on crank, rods) throw that money into a decent set of heads, or have a shop work your's over a bit.

24 lb. injectors will support 500hp +, so 30's are overkill for your combo.

Get the comp cams XR269HR-12 cam

That will get you into the high 12's low 13's range while saving you a few $$$ in the process.

 

Hmmn, maybe I missed the point of the original post?

Is this a "what if I build it this way" build, or what is already in place?

If this combo is already intact, you will be fine with what you have...read this thread regarding L98 heads and stock potential as well as what you can do to them with a few hours of work.

https://www.thirdgen.org/techbb2/sho...&threadid=97882

After reading this, I think you'll agree the heads will work fine with a 383.

I wonder if someone can plug in the numbers to DD2000 to get an idea of the engines output?

 

its daily drivenand still has stock tpi and right now im running everything except the eaton limited slip diff.,b& m transpak and superram, theyre sitting in my room and i got rid of the 58mm tb, 3.73 gears,and 30#injectors
ive raced and beaten 97 trams am(bonestock),96 z28(bonestock), mach 1 mustang(bone stock and crappy shifting), audi 1.8tt, v6 300zx,and countless 5.0's im guessing late im in the late 13's bit ive got to go to the track
all i want is low 13's

 

I run 13.7 with stock L98 bottom end, stock cam, vortec heads, stock runners and plenum, headers with a lousy YPipe and 3" mandrel bent exhaust.

When I do runners and plenum, replace my ypipe and install 1.6 RRs I estimate going low 13s.

Your combo should put you in the 12s easy. To take full advantage of your setup you should be doing your own proms

 

I did not read the entire posting that people posted, but will tell you now that your injectors being 30# will kill you. Go with 24# and you will be much better off. Through my scrolling I did see some other comments about the injectors. Take it and run with it.

I would suggest the 219 cam also with a combo having the SR. A buddy of mine is running a 420/SR in pretty light car and turning 10.6 all day last weekend.

So that cam is killer from 350s all the way to 420CI thus far. I would highly recommend it.

Also if I had a 383/SR I would be lookin for 11s out of it, not 13s.

Hope you get it down there.