Wes Hardin

Need help. I have a chance to buy 2 76 mm turbos (Percision)at a good price. Will a 5.3 with a cam spool them.
Are they to much

Gordon0652

iTrader: (4)

I'm sure the 5.3 will but when is what I am questioning. Why not use one? You'll make 800.

MikeFSKSpeed

iTrader: (37)

Go with a single and have a backup ready!

Wes Hardin

Thanks. I have been torn between a single or twin. I am looking for a 1000hp at the wheels. I talked to a buddy and he said 2 bw s366. I'm lost in this as its my first ls and first turbo. I'm a old school bbc with the gas. Want to buy once not 3 or4. Thanks guys

mrstepheneades

Put em both on there and be a good roll race car lol. Really need more cubes to spool them good. I'd run one and pin the wastegate and just see what you can make with one. My 75mm borg is making over 800 on my stock ls1 with cam. And not even maxed out. Maybe could see 900rwhp with a single precision like you have on a 5.3. I don't know how the precision compare to Borg on power comparability.

1fast bird

iTrader: (22)

Are they the 7675 precisions? Twin 76's would be way too much turbo for those cubes in my opinion. Like said above, just run a single and have a backup. Or search for twin 60's.....

Twin turbo c5

Just buy one . You'll never spool 2 unless you spray it on the boost. One 76mm will make plenty of power for ya.

DBRODS

iTrader: (1)

Yep a 5.3 will never spool twin 76s.

mrstepheneades

DBRODS seems like yours has no problem lol.

Heavy H.P.

Can I get some more info on your build?

3pedals

iTrader: (3)

need to know the turbine size and a/r ratio , and cam specs to even guess whether the 5.3 will be able to spool them both

Twin turbo c5

I'm betting there 96ar exhaust side . Every precision 76 I've seen and had a96 or bigger.

DBRODS

iTrader: (1)

Mine are Tseries Billet 7668s with .81AR housings.

Twin turbo c5

That's alot better but your still gonna have spooling problems in my opinion.

mrstepheneades

Link to thread in sig. Cell phone post like above doesn't post the sig.

1fast bird

iTrader: (22)

I never said they wouldn't spool. It would just be more turbo than you would ever use with a 5.3.....

Forcefed86

iTrader: (4)

Sounds like some healthy rpm too when those things are spooling. How big is the converter? I agree it's too much turbo for a 5.3. Buddys 370 was going low 8's on twin 63's.

11_silverado_noob

iTrader: (5)

I have two NEW! Precision 6176E MFS Turbos. These have never been run and are brand new. They are 61/76e .68ar vband hook up t4 flange. I am looking to get $1200 for both shipped. Perfect for a 5.3.

DBRODS

iTrader: (1)

When it was stock I spun it to 7200. That was a Ptc 9.5 that would stall to 4400 then flash to 6000 in a 80E. Its built now and been pushed it to 32psi. converter makes or breaks a auto setup as far as spooling.

IT_SS

iTrader: (5)

well **** I guess I can run twin 78s on my 370 then