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Twins VS a Big Single??

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Old 11-01-2012 | 07:33 AM
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Originally Posted by N2OBaby
I would like to start at 600-750 FWHP and grow from there without having to buy biggier Turbos.

rotary1307cc, I like the idea of a fast spooling 390-403 Cid LQ9 in a 3500 LB 4th Gen Camaro or Firebird/TA.


Will a Iron block survive for long with 800-900 RWHP?
I've seen them make alot more then that. But at those levels it better have the right internals and a good way of keeping the heads down and it'll last forever
Old 11-01-2012 | 10:15 AM
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Originally Posted by CHRIS-CBRPerformance
Rotary1307cc : It's simple math really, 378 cid x 1.4 hp per cube = 529.2 hp N/A.
That's not to much to ask out of a 10:1 378 with a good set of heads with the right piston
and ring package.
AS a good rule of thumb 14.7 psi will double the N/A hp if good fuel is used.
529.2 x 2 = 1058.4

So 945 hp is about 10% less than 1058.

Give or take a little the math works the numbers are real.

If you are having trouble making power without inflating you silicone couplers
like party balloons we can help you.
hey man whatever you say....

lets see a vid at the track putting up a trap and log of the same run so we can view the MAP, and cross it against time to see that it really is the log of the pass
Old 11-01-2012 | 10:59 AM
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Originally Posted by rotary1307cc
lets see a vid at the track putting up a trap and log of the same run so we can view the MAP, and cross it against time to see that it really is the log of the pass
I hate trash posts like this. Granted I've posted some dumb ******* ****, and will continue to, but jesus titty ******* christ I hate when people think 1/4 mile track numbers are the answer to everything. This world would be so BORING if everyone built his/her car with your goals in mind. Maybe 2000RATA's car was meant to be a comfortable-to-him (not comfortable-to-you) street car with gobs of low-end power.

I don't know what N2OBaby considers a streetable 9-10 second car, so maybe if he defined that more clearly, it would help. My definition would be really fast WITH factory-comfort or better... so that pretty much throws out all track-oriented suspension components, eliminating A/C, and/or putting in a cage.
Old 11-01-2012 | 11:25 AM
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All I'll say is that I've never seen a 6 liter that's built for boost with 317s that made anywhere near 530 rwhp N/A nor have I ever seen a turbo kit that has been 100% efficient aka doubling power at 14.7 psi. There is no such thing as 100% efficiency, physics are a bitch.
Old 11-01-2012 | 12:45 PM
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Originally Posted by NicD
All I'll say is that I've never seen a 6 liter that's built for boost with 317s that made anywhere near 530 rwhp N/A nor have I ever seen a turbo kit that has been 100% efficient aka doubling power at 14.7 psi. There is no such thing as 100% efficiency, physics are a bitch.
Word man

And i guess trap doesnt tell anything about TRUE hp put down and applied dyno numbers are the true story

Who said anything about et here??

Last edited by rotary1307cc; 11-01-2012 at 12:50 PM.
Old 11-01-2012 | 01:15 PM
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Originally Posted by NicD
All I'll say is that I've never seen a 6 liter that's built for boost with 317s that made anywhere near 530 rwhp N/A nor have I ever seen a turbo kit that has been 100% efficient aka doubling power at 14.7 psi. There is no such thing as 100% efficiency, physics are a bitch.
It is not uncommon for N/A motor to be north of 100%.
When the motor has a ***** in N/A form it's not hard to make the #'s
with boost.

Read his thread, you won't read anywhere were he says I'm out of injector or I'm out of fuel pump or I'm out of compressor or the back pressure is to high or my vagina is itchy.

The only set back if you can call it that is wheel spin.
Old 11-01-2012 | 01:43 PM
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Originally Posted by CHRIS-CBRPerformance
It is not uncommon for N/A motor to be north of 100%.
When the motor has a ***** in N/A form it's not hard to make the #'s
with boost.
Physics called, they want their horsepowers back.
Old 11-01-2012 | 01:53 PM
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I have a 9:1 434 sbc that dynoed 610 @ the fly wheel N/A on 93 pump gas.
So Mr Newton, how much boost will take for my motor to make 1000 @ the fly wheel?
Old 11-01-2012 | 02:15 PM
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Probably 3 on the same dyno as the 945 car
Old 11-01-2012 | 02:32 PM
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Originally Posted by CHRIS-CBRPerformance
I have a 9:1 434 sbc that dynoed 610 @ the fly wheel N/A on 93 pump gas.
So Mr Newton, how much boost will take for my motor to make 1000 @ the fly wheel?
Sorry I don't engage in stupid arguments such as this as you can say anything you would like to prove what is said otherwise. I think I'll stick with the physics behind it since you aren't Newton and I don't know of another who has proved him wrong.
Old 11-01-2012 | 02:46 PM
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Originally Posted by NicD
Sorry I don't engage in stupid arguments such as this.
Too late.
Old 11-01-2012 | 03:09 PM
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A pair of Borg S362-S366 or Garret or precision equivalent should get you where you want to be. A Borg S480 single should also get there.
Old 11-01-2012 | 03:27 PM
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Originally Posted by Somebody09
I don't know what N2OBaby considers a streetable 9-10 second car, so maybe if he defined that more clearly, it would help. My definition would be really fast WITH factory-comfort or better... so that pretty much throws out all track-oriented suspension components, eliminating A/C, and/or putting in a cage.
My idea is a 4th Gen Camaro,Firebird,T/A, or GTO with a Fiberglass Hood & or trunk lid,no back seat, lighter weight performance bucket seats,light weight carpet(no pad) over a floorpan treated with 1/16 of an inch of liquid sound deafner & 1/16 of an inch of truck bed coat, no head liner(replaced by 1/32 of an inch coat of SD & Truck Bed coat,a 8-10 point rollcage,no Heat but A/C, 15 inch aluminum wheels like Weld Draglites or Alumastars, an aluminum intake such as Edelbrock's Pro-Flo XFT or Victor, Aluminum heads such as TFS GenX 225s, a TH350 or 400 tranny, a S60 rear,an aluminum rad & intercooler,Twin 60-62MM Turbos, a 15 gal fuel cell w/ a 2 gal spun aluminum tank(auxillary fuel system filled with 122 octane E-98), a tubualr front K-member, a front/rear suspension that replaces heavier stock components with tubular components, unfortunately I see no better more cost effective alternative to a cast iron LQ4/9 block.
Old 11-01-2012 | 03:32 PM
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Originally Posted by Sarg
A pair of Borg S362-S366 or Garret or precision equivalent should get you where you want to be. A Borg S480 single should also get there.
I agree now but before I read the posts here+ the GMHTP article about a 10 sec G-8 with twin TDO6 65MM Mitsu Turbos or the Super Rod article on a 9.0 '02 Camaro with twin Turbonetics T60-1s, I would not have understood these smaller Turbos were so capiable.
Old 11-01-2012 | 03:38 PM
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A single 60 is capable of 500hp easily. It doesn't take that much power to run deep into the 9's with a good 60' and decent weight.
Old 11-01-2012 | 03:48 PM
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Ya gotta think of it in terms of a single turbo with 1/2 the engine. If you look at some of the 4 bangers out there, they are making north of 700 hp at the wheels (some through all wheel drive transmissions that are every bit as capable of robbing hp as a auto) with a single billet wheel Garret 35R or Borg S366. Now apply that same logic by dividing your engine in half. 370 now becomes 2 185 CI motors or 3.0 liters. Look at what some of the import guys are able to do with 3 liters and apply it to twins. It is not exactly apples to apples, but it is close.
Old 11-01-2012 | 03:50 PM
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Originally Posted by jridenour31
A single 60 is capable of 500hp easily. It doesn't take that much power to run deep into the 9's with a good 60' and decent weight.
It would be great to have the capacity in terms of Turbos & Fuel system to be able to see 1000-1200 FWHP but have the base tune around 750-820 FWHP.
Old 11-01-2012 | 03:51 PM
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Just a matter of turning up the boost
Old 11-01-2012 | 04:01 PM
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Originally Posted by Sarg
Ya gotta think of it in terms of a single turbo with 1/2 the engine. If you look at some of the 4 bangers out there, they are making north of 700 hp at the wheels (some through all wheel drive transmissions that are every bit as capable of robbing hp as a auto) with a single billet wheel Garret 35R or Borg S366. Now apply that same logic by dividing your engine in half. 370 now becomes 2 185 CI motors or 3.0 liters. Look at what some of the import guys are able to do with 3 liters and apply it to twins. It is not exactly apples to apples, but it is close.
It sounds like with Twin 62MM Turbos a 390 cid LQ4/9 is all I will need.
Old 11-01-2012 | 04:42 PM
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Originally Posted by N2OBaby
It sounds like with Twin 62MM Turbos a 390 cid LQ4/9 is all I will need.
This would be a pretty sick setup.


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