crashly

hey guys,
can you give me your opinion on this set up.
358 cubes,sbc , twin turbonetics 76mm turbo's, S trim turbine wheel
roller cam , dart pro 1 heads, power glide, methanol fuel, drag race only,
NO NITROUS OXIDE ALLOWED, 2 38mm w/g's per bank....

what turbine a/r should i get....????
rpm from 5500 to 8000-8500 ish

thanks
ash

hellbents10

iTrader: (10)

.81 a/r and f1 turbine wheels I would imagine you will be building by 4k and making full by 5500.

crashly

hellbents,
thanks for reply.
already have the .81 's , they sppol to 4000rpm on flat stall, but engine will not pull up any higher, even if i wind up manual bosst valve. If i put the twin 61mm back on, it goes to 5700 rpm...

i think the 76mm turbo's arenot in there sweet spot...
just trying to gte ideas what exhaust a/r's tp put on..

how do you think .68 a/rs would go?
thanks

crashly

what size exhaust a/r are you guys running with 350 ish cubes ?

thanks

ChrisUlrich

Why not go with twin 70mm turbos from Forced Inductions? Similar power but waaaaaaaaaaaaaaaaaay better spool time. Or even their 76mm turbos.

crashly

gtk 1000's / 850 in the workshop now...
no use buying new ones

actually got them before i knew about fored inductions sales.

\thanks

ninetres

iTrader: (35)

Thats a lot of turbo for 350 cubes. I'd go with some ST70s if you insist on twins

crashly

yeep i know...
need those turbo's to run the class...
up against roots and screw blowers
have to run minuim 6.5 @ 210 mph ......

last pass was 7.2 @ 191 mph with twin gtk m550's
on 355 cube engine

thanks
ash

LASTLS1

iTrader: (7)

I run a .81 ar and it spools like a dream! 408ci.

crashly

cool, starting to get some answers...
what stall converter you got?

even tho you have 50 more cubes....
i suppose the .68 a/r on 358 cubes would be comparable to your.81 a/r on 408 cubes???


pictures of the drag car this engine is in.
thanks

Websy21

iTrader: (34)

chuntington101

thats nuts! what power are you currently putting down??

Chris.

crashly

engine on stand not run( raced..)....( twin gtk 1000's)
little spool up troubles..
gtk 1000/850 come with .81 a/r's hotside.... only gets to 4000 rpm ..
thinking i need a smaller a/r OR looser converter. ???

engine in drag car , twin gtk 550's
355 cubes..
magic spool, can do pro tree start.
maxed out turbos @ 33 psi
run 7.2 @ 191 with 10.2 : 1 a/f ratio ( lazy)

thanks
ash

onfire

iTrader: (17)

I'd go with the 0.81 and build a converter to spool it for max power.

crashly

you may be right...
ordered both...

ordered .68 a/r housings ( 2)

and new torque converter
old one is 10 inch
new one will be 9 inch

thanks to all, great input
ta

ash

crashly

couple of turboed chevy altereds in australia....
white altered:
355 cubes sbc twin 61mm , mech fuel injection
runs 7.2 @ 191

black twin turboed sbc alterd:
355 cubes , twin 66 mm , mech fuel injection
runs 4.7 @ 131 ( went 1.02 60' , and backoff to not break out...lol)
and
8.0 @ 171


black single turbo altered:
498 cube ,bbc , single thumper, efi ...
runs 7.1 @ 191.5

Beaflag VonRathburg

iTrader: (176)

Those look so amazingly bad *** and fun!

chuntington101

haha you guys are nuts! lol

what fuel do you have to run?? are you running chargecoolers?? how much boost do you guys normally run??

Chris.

crashly

no coolers
all methanol fuel
my altered ( white one), sbc, we ran 30+ psi with twin gtk 550's (61mm) , Mech inject.

geof kelly, sbc , twin 66mm turbo's , black altered, runs 20 ish psi...mech inject

mark hinchelwood , bbc , single thumper, runs 26 ish psi..... EFI

cheers ash

p.s
twin gtk 1000's (76mm ) fitted to 358 cube sbc
will see how they go soon....
going into white altered.
same car went 6.3 @ 216 mph with all iron 366 cube sbc, with D series PSI screw charger.
hoping for same or better with twin turbo's

BiggO

Im running 406 sbc,twin t76 wit .68 A.r....My boost come on hard around 3500...Planning on swappin over to .81....

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