383 LT1 runs 13.30's
#21
TECH Fanatic
iTrader: (5)
he is way down on power...a bolt on lt1 stock internals should trap at least 106. Figure out why it's not making the power it does. The et is about right for the mph could be a lil lower but its acceptable.
and to wickedbusa
my friends cammed ls1 traps 117-118 and goes 11.7-11.8 so i think your fine you probably could pick up a lil et
and to wickedbusa
my friends cammed ls1 traps 117-118 and goes 11.7-11.8 so i think your fine you probably could pick up a lil et
#23
TECH Resident
iTrader: (7)
Join Date: Jun 2005
Location: Akron OH
Posts: 773
Likes: 0
Received 0 Likes
on
0 Posts
he's shifting too early. i shifted my 355 with cc503 at 6300 which seemed a little early. with a cam the size of his he would want to run the gears up to at least 6500 or so. I kept getting beat my a friends bolton 13.6 t/a until i realized that i was shifting way early(around 6k). we went back out again with me shifting at around 6300-6500 and it was a completely diff race.
#25
11 Second Club
Thread Starter
iTrader: (5)
Join Date: Aug 2004
Location: Morris IL
Posts: 637
Likes: 0
Received 0 Likes
on
0 Posts
So....I'm guessing with a full dyno tune instead of the mailorder tune (currently mail order with 6200 rev limiter) a tire, and maybe a little suspension work this should be a solid low 12 sec-high 11 sec combo then?
#30
TECH Veteran
iTrader: (246)
something isnt right at all it might not even b a 383 or even the worst build ever stock lt1 or 383.. 80% of these cars have stock lt1 with just simple bolt ons run 13's all day easily so with with this build it should be 11's. here with my car i ran 12.23 at 122mph with stock tires with the drs it way faster. ur build or tune is jacked up get it fixed quik and dyno it as well.
#32
TECH Senior Member
iTrader: (26)
That setup is not going to et at all. he is running 3.42 gear and needs to be running a 4.10 with that big duration cam. Also since that cam's duration is 236-240 you should be twisting it to 6500-6700. that is costing the car power!!! Drop that 2.2 60ft down to a 1.8 with some dr's will definately help. Correcting these three issues should drop a full second off the et easily with a good driver!
#33
TECH Fanatic
Join Date: Jan 2004
Location: Kingfisher Oklahoma
Posts: 1,157
Likes: 0
Received 0 Likes
on
0 Posts
My old 383 only had 9.8 to 1 compression and it trapped 120 mph.
When I first put it together it ran like crap, the knock sensor was seeing knock ALL THE TIME I desensitized it and the motor acted like I just added 100 hp. We later tuned it with a stand alone AFR logger and made sure it was false knock (it was).
When I first put it together it ran like crap, the knock sensor was seeing knock ALL THE TIME I desensitized it and the motor acted like I just added 100 hp. We later tuned it with a stand alone AFR logger and made sure it was false knock (it was).
#34
I agree that somethings wrong with the car. He needs to bump up the shift points, probably around 6500 rpms, change the rear gears out to 4.10s. But it needs to be put on a datamaster or something to see what the problem is. Its pretty poor that the car is traping about what a stock car with bolt-ons would. I had a problem with my car not running worth a **** after I got it out, but turns out I burnt 2 plug wires in half. It would idle perfect, but had a horrible dead spot from about 3000-6500. I raced my brothers '94 Cobra with LTs, X pipe, catback, gears and intake and would barely beat him. I replaced the opti and wires and then put in some NGK TR55s and it ran like it should. Could just be something stupid, or could be a big problem.
Let us know what happens though
Let us know what happens though
#36
9 Second Club
iTrader: (4)
Join Date: Dec 2004
Location: Cali
Posts: 2,607
Likes: 0
Received 0 Likes
on
0 Posts
With that same motor almost (only mine was a 355 with the same cam) I ran 119 in the quarter mile on slicks.... I ran 106 when I had a few bolt ons and entire motor internally was stock. Something is SERIOUSLY wrong..... make sure motor has all 8 plugs where they are supposed to be....
#37
11 Second Club
Join Date: Jul 2007
Location: Hoagland, IN
Posts: 94
Likes: 0
Received 0 Likes
on
0 Posts
I ran 12.9s with stock ported head and a mild 211/219 cam @111 mph. Haven't been to the strip yet with my 383 combo, but I'll be pissed if I can't do low 12s or high 11s. Something is wrong.
#38
TECH Fanatic
iTrader: (6)
the 60 foot is the main problem, 1 tenth in the 60' is 2 tenths in the quarter. and who ported the heads and what does the car make power wise on the dyno and is it tuned. my 383 with stock heads runs 12.7 @110 with a 2.0 60' (my first and only quarter mile run, the next one broke my torque arm). so anyway i figure a 1.7 60' would net me a low 12 run, which i think is where i should be for stock heads and a 306 cam. (i got ripped off thats why i have stock heads)
so if your friend ran a 13.36 on a 2.3, 6 tenths off of that 60 would net him a pretty straight run.
so if your friend ran a 13.36 on a 2.3, 6 tenths off of that 60 would net him a pretty straight run.
#39
The 60' is NOT even close to being the "main problem" here. He is definitely down huge on power, probably retarded timing due to knock detection like some people said above.
My 6 speed car with 4.10s, cold air, 1.6 rockers, tune, and very very lightly hand-ported heads trapped at 107mph, and put down 286rwhp (completely stock exhaust including cats).
My 6 speed car with 4.10s, cold air, 1.6 rockers, tune, and very very lightly hand-ported heads trapped at 107mph, and put down 286rwhp (completely stock exhaust including cats).