Benjamin Russick

iTrader: (1)

With all the new head options, I just wanted to get your guys input on the "best" head for a 383. I've tried a "search" and checked out threads like the "370 vs. 383", but would still like more info. The 383 is currently set-up like this:

TEA 5.3 1.5 heads with 2.05 intake 1.60 exhaust
Forged Dimond pistons approximate compression 11.2 to 1 with current heads
Forged Eagle Rods 6.125 inch
Forged Eagle Crank
Comp Cams XER 612/244/112 +4

Any input would be great! Thanks! Ben

Bo White

iTrader: (59)

With that setup I would go with a set of AFR 225s touched up by Tony Mamo along with one of his FAST intakes.

gollum

iTrader: (1)

With that setup I would go with a set of AFR 205s touched up by Tony Mamo along with one of his FAST intakes.

Or for about the same price or maybe a little cheaper

With that setup I would go with a set of Trickflow 215's touched up by Ron@Vengence along with one of his FAST intakes.

Bad Blue WS6

iTrader: (41)

CaMaRo67RS355

iTrader: (75)

AFR or Trick Flows

BYE RICE

iTrader: (2)

https://ls1tech.com/forums/dynamometer-results-comparisons/766154-texas-speed-383-long-block-dyno-results.html See mod list..Are they the best?
No..But they work.

Benjamin Russick

iTrader: (1)

Would the 225s be overkill for the combo? What size valves? Thx!

Benjamin Russick

iTrader: (1)

I was actually considering the AFR 205s as my local shop has been putting together some impressive combos with them. Again, what kinda valve size for the smaller bore? I don't know squat about the TrickFlow 215s. (Goes to start Internet search...)

Benjamin Russick

iTrader: (1)

Great results considering the 12-bolt! My dyno curves are similar (the TQ curve may be even flatter if you can believe it), but about 30HP/30TQ less across the 5000-6500 range. I know that my LS6 intake/TB combo is holding me back... Thanks for the link!

Chad@LivernoisMotors

Our stage 3's would work perfect on that combination.


On one of our customers cars...1998 T/A, Full interior, Full Weight Street Car.

Livernois Motorsports Built 383 ci LS1
Lunati Stroker Crank, Rods, and Pistons
Livernois Motorsports Ported LS6 Cylinder Heads
Livernois Motorsports Custom Grind Camshaft
LS2 Intake Manifold
FAST 90mm throttle body
Tuned by Livernois Motorsports

This was a solid roller car, with HAND PORTED 243 casting heads. Our Stage 3 CNC'd were still in development at the time.

The car made
511 rwhp
456 rwtq

Best ET: 10.27 @ 133.9 MPH. More information and videos here. http://www.livernoismotorsports.com/...?gk=76&t=rides




Shoot me a PM and we can work something out for you.


Thanks,

Chad @ Livernois Motorsports

Benjamin Russick

iTrader: (1)

Chad @ Livernois Motorsports- Thanks for the reply! What RPM are you turning that 383 to? Bear in mind that my car is 90% street/10% track, so I'm hoping the low to mid doesn't fall off. I'll drop you a PM tomorrow when I am more awake (it's 10:30PM here)...

Bo White

iTrader: (59)

Considering youve already got a good set of heads on it I dont think the swap to AFR205s would justify the expense and with the size cam you have the 225s will be more suited for a more aggressive setup like yours. Tony has different setups on chamber size and such so I would contact him on whats available and his oppinion too. I see where Chad is comin from recommending the larger LS6 ports because of the same reason.

Tony Mamo @ AFR

iTrader: (13)

Here you go....

All the info you could ask for concerning building a strong running 383.

https://ls1tech.com/forums/showthrea...=384450&page=1

Either product we offer would work very well....it's just a matter of which hook you want to hang your hat on. If you wanted more snap in the throttle and simply better overall part throttle response (basically just the cruising part of your power band where you spend 90% of your time mind you) then get the 205's....if you want a little more top end power at the expense of some of the crispness in the throttle then go with our 225's.

Just take your time and read thru this thread....its full of good info pertinent to your build.

Regards,
Tony

Benjamin Russick

iTrader: (1)

Tony "Morpheus" Mamo - Heh. I remember when that thread came out. It's looking like the stars are aligning for the 205s. Are there any other things to consider? Thx!

venom ws7

iTrader: (13)

AFR Is the way to go these heads are awesome.
Tony personal car made 535rwhp with 383 and AFR 225 But it was solid roller.
The car ran 11.0 doh PM Tony for the link.

If you are on the budget check PRC Heads from TSP the are awesome heads too with great price.

PewterZ28

iTrader: (1)

My 383 is being buttoned up as we speak. I just kept my ETP heads because I felt like they were well suited for a 383. They are the small bore 225 heads wth 58 cc combustion chambers, 2.08 Intake and 1.57 exhaust. I will probably play around with cams but staying with my FTI Streetsweeper for now. Here's my thread: https://ls1tech.com/forums/generation-iii-internal-engine/767978-critique-my-383-build.html

I think you will be happy with any of the suggestions mentioned in this thread so far although the Trick Flow heads seem to have the edge this year.

BlackSVT03

iTrader: (1)

Edelbrock 215s

0utLawTransAm

if u got over 4'' bore you could use the 192 head the flow crazy amount of air and cost 1/3 of other heads

BYE RICE

iTrader: (2)

Do you mean "L92's"..?
4" bore only.
383= 3.905 bore

0utLawTransAm

my bad i did mean l92 but i thought u could make a 383 with 4'' and stock crank ?