LS6427

iTrader: (2)

I spoke to him (email) and I'm considering getting one, $1,000 down and wait like 26 weeks for it. I can use a FAST 102mm in the meantime, then retune for the Marcella and the spray when its delivered.

Money is meaningless.....but I don;t want to spend it if it'll just be a waste of cash........so......

Question is: Is it going to make allot more power than a ported FAST 102mm.

441ci (4.125 x 4.125)
WCCH ported Brodix LS7 heads
Marcella intake: with a 102mm TB (or maybe larger)
Much more aggressive cam than in my sig
11.5:1 cr (93 0ctane)
4L80E
3.23 gears
3200 stall
200-250 DP shot plumbed into the intake, stand alone tank with race gas

******Roll racer only. Street car only. Never a drag racer.*******

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DietCoke

iTrader: (18)

I wouldnt be surprised to see that big a motor pick up 35-50hp above 5k rpms over a fast with a nice sheet metal. Trade off is hp below, and tq down low.

LS6427

iTrader: (2)

Yea, the low end loss will happen....but it will still roast the tires from a dig......right?

I'm not so concerned with low end, off-the-line starts, as I'll be on radials anyway and on the street. Only so much power and torque can be put to use on the street...from a dig. I'll have way more than would be useful. At a prepped track on slicks I could see this being an issue.

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DietCoke

iTrader: (18)

You and I think alike. You're going to roast the tires anyway with that much motor on the street, might as well let her breathe up top. The car will be significantly faster. I've got a sheet metal for my car too

2efnfast

iTrader: (2)

Why go Marcella? This intake looks perfectly functional

https://ls1tech.com/forums/generatio...take-ever.html

HP FEVER

No wait time.. I'm sure it's still available

ss454327

iTrader: (10)

3200 stall? I'd keep the FAST with that...with the sheet metal intake I'd move up to a 4k stall.

LS6427

iTrader: (2)

For a roll racer though????? I thought a tighter stall is better for that.

40-160mph runs..............

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LS6427

iTrader: (2)

That thing is garbage...............lol

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LPE 403

iTrader: (6)

I'm sure you've spoke with John regarding runner length? I was going with one of his intakes (through VSpeed) before we figured the tbody configuration wasnt going to work. With all the power in my build intended for 6500-6800 and below, low end really wasnt going to be an issue.

He can pack 10lbs in a 5lb bag if you know what I mean

LS6427

iTrader: (2)

If you're right about 35-50 RWHP over a FAST 102mm....that should put me well over 600 RWHP through my 4L80E..........

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ss454327

iTrader: (10)

Depends on where your power band is no matter what the use. If it's a higher strung engine and you hit it at 40 and get little to no flash out of the converter you will be lugging down on the shift. The purpose of a higher stall converter is to help get the motor in it's power band quicker. If this car shifts at 6500 or better (should be 7k) he will never lose more than 1500 on the shift so in a roll race he won't be below 5krpms ever. If he is going to spray it then I would say yes a tighter converter would be much better.

LS6427

iTrader: (2)

He is me...its my car...

So what would you recommend for a 250 shot on top of the 441ci?

I'll experiment........I can buy two different converters and try them out.

What two? And I think my builder actually wants me shifting at 6700 rpm. IIRC.....

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ss454327

iTrader: (10)

With N2O you want a tight converter so I would go with something in the 3200-3400 range that doesn't flash too much. Yank Pro 3400 or Circle D triple disc 2c.

LS6427

iTrader: (2)

Cool.........I'll look into them. Thanks.

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ss454327

iTrader: (10)

Please do...I'm not claiming to be an expert so hit up the real experts and see how far I'm off.

LS6427

iTrader: (2)

Question about the sheet metal intakes under the cowl of a Firebird T/A.

I don't want to cut anything.....Marcella said he'll make it fit perfectly.

But....will it have an issue with the rear cylinders getting starved a little bit of air, as compared to the forward cylinders?

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430 hp 70

iTrader: (3)

i think john would know the answer and i dont think he would bs you. with his 28 week wait time i dont think he really needs to sell any intakes. i talked to him last week about one for mine and he seemed like he knew his stuff.

LS6427

iTrader: (2)

Oh man......I never for a second thought John would just sell me something just to make a sale.

The cowling on a Firebird is rather low and he mentioned to me that to make it fit would be the main deciding factor in the intakes design......where as if he had unlimited room he can put 100% of his techniques towards making the best intake for the engine......

I was just wondering if the design requirements will make the rear cylinders have issues......like almost every other "plastic" type intake does.

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430 hp 70

iTrader: (3)

im like you and love to hear opinions. i just spend too much time reading other peoples stuff and need to just get it from the source. 3400+ would suck to spend and not get the results you want though. i guess i should consider myself lucky that i have a chevelle and have plenty of room for him to work with. i still have to talk myself into it though. the precison metalcrafters can be had for about 1200 bucks cheaper and looks just as good imho. ive only heard of one dyno sheet that said it didnt perform, but i dont know if it was cammed for it either.