awd-rwd racer

iTrader: (16)

i have a L76 6.0 engine. ported 317's, tick 226/235 .605"/.610" 115+2 turbo cam, and a masterpower t76 with a .96 a/r. Im currently getting full spool around 4000-4200 rpm. around 10-11 psi. it pulls like crazy, but id like to get it to spool a little faster if i could. i currently have dual 3" merge coming off the headers. I did some reading that changing from 3" to 2-2.5" pipe merge would help with spool up with out sacrificing any power. any other tips or tricks i could try? i know its not a big turbo compared to some of what you guys run, figured it might spool a little faster. thanks!!

MUSTANGBRKR02

iTrader: (91)

Switching to a smaller pipe would help a bunch. Shouldn't be any problem spooling that turbo with that wheel with a 6.0.

awd-rwd racer

iTrader: (16)

which pipe would u suggest? 2", 2.25", 2.5"? what kind of increase spool time would i be looking at?

also by switching to a smaller pipe? would affect the higher rpm power range?

MUSTANGBRKR02

iTrader: (91)

I am building a 427 with a 94mm turbo and going 2.5" Sch 10

JoeNova

With a 76 You could run a 2" pipe without sacrificing any power. If it was a billet 76 you might want 2.25" just for some headroom, but you won't be needing it with the master power. I would drop to 2" and wrap the hot side. Your spool should pick up considerably.

ddnspider

iTrader: (26)

There is zero mechanical reason that you should be spooling that slow. It is ALL in the tune.

speedracer5532

iTrader: (8)

For your application I'd run 2" from the headers to the turbo.

71 chevy

iTrader: (18)

you are having trouble spooling a single 76 mm with a 6.0? something is VERY wrong.

also, how responsive are you looking for? i mean an NA 6.0 is freaking torquey even without a turbo.

if you want somewhere to start, look at timing, maybe looser converter, or if its just too slow- add nitrous.


good luck

JoeNova

3" crossover is one mechanical reason. Thats a massive reduction in exhaust velocity, the exhaust is hitting the turbine slower. 3" crossover is usually used in 2200+ HP apps.

Ryans99ls1

iTrader: (16)

Even with 3" piping, it shouldnt spool that slow on a 6.0. It could probably fiixed by playing with timing/fuel during its transition into boost.

awd-rwd racer

iTrader: (16)

assuming the tune stayed the same...(i can change it, just using this situation as a base line) dropping to a 2" crossover, what could i expect in rpm for spool up?

NitrousExpress

iTrader: (4)

You could put a single nozzle pre turbine, that will definitely help it spool!

-Garrett

Rise of the Phoenix

iTrader: (27)

^^^ Money right there.

awd-rwd racer

iTrader: (16)

not looking to add nitrous at all. no offense...it is way to expensive to fill a bottle around here. almost 70 a bottle. no thanks.

Phil99vette

iTrader: (11)

2.25" crossover pipe
advance the cam 4 degrees

123quattro

I'm with most of the others. Something is more wrong than the piping size. It should be spooling 1000+ rpm sooner as is.

Blackpanther99

iTrader: (8)

This^^ Will definitely help the spool be a lot quicker.

necrocannibal

iTrader: (5)

Im running a billet 7675 on a 383 and it spools so quick it is ridiculous, even the shop that put it together was amazed at how fast it spooled. Im getting full boost well before you are probably low 3000, maybe even in the high 2000 range but I haven't really paid that much attention to know exactly.

MUSTANGBRKR02

iTrader: (91)

I was thinking 2.25 aswell.

awd-rwd racer

iTrader: (16)

not saying it doesnt start to spool untill 4k...just saying i dont get full boost till 4000-4100rpm. although i would think it would be at full boost sooner.