anybody test on a big cube motor power difference from l92 carb with 90 mm tb two l76, ported or non ltrying to find out what way to go

 

What are your goals...

I have a L76 intake, but I didnt install it. (cough.. it is for sale )

I am positive that if you remove my non ported carb and put the L76 on you will pick up atleast 30rwhp easy. The non ported carb flows like ****! it hangs into the head and is a restriction for even nonported heads. If you plan to spray more than a 200 shot... the carb is a much safer way to go, especially with a plate and custom hard lines. That is what I went with. The carb will only compete with the L76 at 6000rpm+ from the dyno numbers that I have seen. Now a ported carb and an L76... I would go with the ported carb, it seems to really tame a cam due to the short runner, and also looks much cooler.

 

i need to find out whats going on with my car it has the l76 that is ported a little and made less power then your car. mines a 416, 11-2-1, livernois ported stage 3 l92 heads, all the bolt ons, a electric water pump, you name it its got it, 3inch true duel with dyno max bullets, the headers are 1-3/4 no cats, going to change them to 1-7/8, th400 with 3600 nitrous converter 3.42 rear gears with 15inch prostars mine made 445 whp 398 wtq

 

thanks for the help you been giving me!!

 

might be the cam?

 

yeah thats what iam thinking who has a proven cam that works with the l92 heads??

 

I don't know if anyone has came up with the magic cam yet.

 

my cam is a 240/252 .650/.661 lift on a 114+3

car made 505 at the wheels through a 6 speed, livernois stg 3 L92s, still on stock maf, only 1 3/4 headers, and no underdrive or EWP or anything like that, and a stock unported L76 intake.

motor is a 402, and is built for the bottle, and patrick g speced my cam out for a big shot

 

Its hard to judge chassis dyno numbers with unlocked stalls with high stall speeds.
That bein said, do you know the cam specs? Can you post them?
Do you have a graph? Can you post that?

 

jdp who cut the cam and what comp. is the motor?

 

its a Comp grind, on XER lobes, compression is about 11:1 so its not to high.

im debating wether or not to go to the carb style intake, im waiting for ssomebody to make a composite one, cause im not spending 2-3k on a sheetmetal. my cam made peak power i think at around 6300rpms, i wanted something that was going to make power to high 6 grand, and patrick speced it out to make power up top, he told me the l76 intake was going to hold peak power down in the lower 6k. so if i step the headers up to a larger primary and do something with the intake, the car should put down a few more ponies

 

my cam is a 248-262 637-647 on a 112 comp is 11 to 1

 

here is a cam that I spec'd up to try with the single plane.

246/254 .620/.620 111+4

Seat Timing Events are:
Intake Close 50
Exhaust Close 12
Intake Open 16
Exhaust Open 62
Overlap 28 degrees
Advance +4

 

if you are going with a composite intake.... I suggest you just go with the norm..... a 244/248 .612/.615 on a 112+3 or something.

 

without knowing the ICL (intake lobe centerline) it is hard to see what that cam is.

 

i will check on that i know whey said it had like 38 degrees overlap

 

[QUOTE=Forteen3GT;7893861]What are your goals...

I have a L76 intake, but I didnt install it. (cough.. it is for sale )

I am positive that if you remove my non ported carb and put the L76 on you will pick up atleast 30rwhp easy. The non ported carb flows like ****! it hangs into the head and is a restriction for even nonported heads. If you plan to spray more than a 200 shot... the carb is a much safer way to go, especially with a plate and custom hard lines. That is what I went with. The carb will only compete with the L76 at 6000rpm+ from the dyno numbers that I have seen. Now a ported carb and an L76... I would go with the ported carb, it seems to really tame a cam due to the short runner, and also looks much cooler.

QUOTE]

are the non ported intakes really that bad? i have been thinking about running a carb intake and elbow. i am really kinda up in the air about doing this or not.

 

[QUOTE=SUTTERERMAN85;7902618]
JMHO..... they hang into the head...... they seriously need to be gasket matched to the head to be optimal. again.. just my honest opinion.

 

hmmm.. well thanks for your opinion on this. are the gaskets like rubber ones on composite intakes or are they like paper on a traditionals SBC? wondering how they can be port matched at home...

 

Matbe this will Help. http://http://www.gmhightechperforma...gine_l92_heads