SBC Twin Turbo recomendation
07-25-2005, 11:59 AM
#1
Teching In
Thread Starter
Join Date: May 2005
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
SBC Twin Turbo recomendation running a 383 gen I small block. i would be doing a intercooled blow through carb setup with AFR 210 heads, sollid roller cam 242/248 on 110lsa .615 lift. the twin turbo kit on http://forcedinductions.com/ has me thinking... i saw a Garrett T4 60-1 turbo on ebay for $475 with 50mm wastegate and BOV. the turbos A/R ratios are .60 on the turbine and 1.15 on the compressor. how would a pair of these run on my engine? are thoes A/R ratios good for spool but still make high RPM power? any guesses on what it would put down? thanks in advance 
07-25-2005, 12:16 PM
#2
I will be running 2 of those in my 383 just make sure they arent frome ssautochrome most turbos on ebay are extremely cheap knockoffs that split in half because they are glued together!!!! and for 475$ they probably are the glued ones or very crappy ones. the turbos i have are used that i bought off a friend he paid 1200$ plus a peice. so for 475$ i would be leary!!! expecially if that includes a bov and wastegate!
07-25-2005, 12:19 PM
#3
Yea man, stay away from SSautochrome... I hear nothing but bad stuff. I would def go with a name brand setup... not a "like" name brand. Get a genuine Garret, Turbonetics, KKK, etc... someone that has a good name established.
Originally Posted by elcamino383
running a 383 gen I small block. i would be doing a intercooled blow through carb setup with AFR 210 heads, sollid roller cam 242/248 on 110lsa .615 lift. the twin turbo kit on http://forcedinductions.com/ has me thinking... i saw a Garrett T4 60-1 turbo on ebay for $475 with 50mm wastegate and BOV. the turbos A/R ratios are .60 on the turbine and 1.15 on the compressor. how would a pair of these run on my engine? are thoes A/R ratios good for spool but still make high RPM power? any guesses on what it would put down? thanks in advance
07-25-2005, 12:37 PM
#4
Teching In
Thread Starter
Join Date: May 2005
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT
yeah the seller is www.ssautochrome.com ... too good to be true huh?
damn that makes me 
yeah the seller is www.ssautochrome.com ... too good to be true huh?
damn that makes me
07-25-2005, 12:53 PM
#6
I know man, it's a heartbreaker. I would consider finding an established quality rebuilder and get them used. That's what I plan on doing. Prices are very reasonable.
From what I've heard on this board, I wouldn't trust ssautochrome for anything. Do a search for them on the Forced Inductions section!
From what I've heard on this board, I wouldn't trust ssautochrome for anything. Do a search for them on the Forced Inductions section!
Originally Posted by elcamino383
it says garrett internals? is that a lie? how can they be so cheap? they look sweet. 
07-25-2005, 01:38 PM
#7
TECH Regular
iTrader: (4)
Join Date: Jun 2005
Location: Marietta, GA
Posts: 408
Likes: 0
Received 0 Likes
on
0 Posts
i would agree, no turbos from ssautochrome, but i did buy my 24x12x4 intercooler from them, and it is identical to the OBX unit which have been proven to work awesome, and i got it for $190!!
Trending Topics
07-25-2005, 02:16 PM
#9
Twin 60's would def work... not sure what A/R for the turbine and compressor would be best though... I'm curious to hear some other opinions though!
Originally Posted by elcamino383
ok well forget ssautochrome. back to my origional Q. what A/R ratio should i look for? would dual T4 garrett 60s be good?
07-25-2005, 03:30 PM
#11
Teching In
Thread Starter
Join Date: May 2005
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by hellbents10
I am using two t04e-60's with a 58 a/r and stage 5 wheel on the 355 blow through in the s-10.
how much power can twin 60s on pump gas make in a motor like mine?
07-25-2005, 03:38 PM
#12
On pump 700-850 I would imagine with a good set of heads and cam. I am using brodix track 1's and a comp cam 236/248 554/520 113lsa. For now I will be changing the cam once i see how it runs though. The bottom is all forged stuff with 8.5:1 compression. Headers are 1 3/4" primary.
07-25-2005, 05:54 PM
#13
TECH Enthusiast
Join Date: Nov 2003
Posts: 689
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by hellbents10
On pump 700-850 I would imagine with a good set of heads and cam. I am using brodix track 1's and a comp cam 236/248 554/520 113lsa. For now I will be changing the cam once i see how it runs though. The bottom is all forged stuff with 8.5:1 compression. Headers are 1 3/4" primary.
I think 700 is reasonable, but I doubt you'll see 850 on pump gas out of those. That's fairly close to the absolute max of the compressor wheel, and a .58 A/R hot side doesn't make it any easier.
Originally Posted by elcamino383
whats the A/R for the compressor?
), but there isn't the wide variation of available exhaust housings (IE, .48, .63, .82 A/R T3 exhaust, .58, .68, .81, .96, 1.15 A/R T4 exhaust) because the compressor housing has less of an impact on how quickly the turbo spools.Twin T4/60-1's maxed out should make 1250-1300 RWHP. I don't think 800-900 RWHP on pump gas with a .81 hot side would be too much of a strech on a well built 383.
07-25-2005, 06:23 PM
#14
Thanks man, lots of good information there! Can you get those with water-cooled bearings?
Originally Posted by eviltwins
I think 700 is reasonable, but I doubt you'll see 850 on pump gas out of those. That's fairly close to the absolute max of the compressor wheel, and a .58 A/R hot side doesn't make it any easier.
Keep in mind there arn't a whole slew of different compressor housings available. Some standards are the TO4E (3" Inlet, 2" Outlet, .50 A/R) TO4S (4" Inlet, 2.5" Outlet, .70 A/R), and the TO4H (4" Inlet, 3" Outlet, Can't remember A/R), but there isn't the wide variation of available exhaust housings (IE, .48, .63, .82 A/R T3 exhaust, .58, .68, .81, .96, 1.15 A/R T4 exhaust) because the compressor housing has less of an impact on how quickly the turbo spools.
Twin T4/60-1's maxed out should make 1250-1300 RWHP. I don't think 800-900 RWHP on pump gas with a .81 hot side would be too much of a strech on a well built 383.
Keep in mind there arn't a whole slew of different compressor housings available. Some standards are the TO4E (3" Inlet, 2" Outlet, .50 A/R) TO4S (4" Inlet, 2.5" Outlet, .70 A/R), and the TO4H (4" Inlet, 3" Outlet, Can't remember A/R
), but there isn't the wide variation of available exhaust housings (IE, .48, .63, .82 A/R T3 exhaust, .58, .68, .81, .96, 1.15 A/R T4 exhaust) because the compressor housing has less of an impact on how quickly the turbo spools.Twin T4/60-1's maxed out should make 1250-1300 RWHP. I don't think 800-900 RWHP on pump gas with a .81 hot side would be too much of a strech on a well built 383.
07-25-2005, 08:15 PM
#16
TECH Fanatic
iTrader: (3)
Join Date: Mar 2002
Location: Pontiac, MI
Posts: 1,364
Likes: 0
Received 0 Likes
on
0 Posts
Someone out there is making twin turbo manifolds for the SBC. I wish I could find the link. It was either All-Stainless or Stainless Works. Post up if you find them.
-Geoff
-Geoff
