Moparts
turbo 408
Posted By: Ian
turbo 408 - 05/21/10 01:53 AM
hi i have a 408 with scat 4340 crank and rods probe pistons 9.3 comp cnc 245-1 indys, i am a turbo virgin ,but a nos junkie car is a 65 valiant 3550 lbs runs 10.80 asp and
9.9@134 on the gas .what size turbo ,cam etc to run around 850 hp and any other info thanks ian
Currently, I am building a 392 with home ported Eddy heads with Inconel exh valves, 76 mm turbo, air to air cooler, FAST injection system. It has custom JE 9.5:1 turbo pistons, H-beam rods, forged crank, main and head studs, M1 intake, Hughes 224 duration hyd roller, 4 bolt splayed mains, partial fill, 727 with 4500 converter, Dana with 3.54 gear and 315/60/15 drag radial.
It will be capable of making 900-950 hp, but of course my block will limit me to about 700-750.
Posted By: Ian
Re: turbo 408 - 05/21/10 04:15 AM
thanks mate it sounds like thats were i would like to be . i am 3/4 fill 2 bolt mains std caps studs top and bottom. what boost levels to make that power and your pie sizes ,what are ya turbo specs .thanks ian
I don't have the specs on the turbo yet...not that far...still in the freshening/building of the motor stage.
Posted By: Mr.Yuck
Re: turbo 408 - 05/21/10 12:58 PM
once you boost it you'll never go back to NOS. Boost is full time fun.
Posted By: Ian
Re: turbo 408 - 05/21/10 04:14 PM
i was thinking the bw s400sx4 part 177287 750-1250 hp rated what do ya think
Posted By: joshking440
Re: turbo 408 - 05/21/10 04:22 PM
76mm with out a doubt Precision Turbo
Posted By: Ian
Re: turbo 408 - 05/21/10 04:44 PM
is this to big
# Currently the highest-flowing S400SX unit available, with maximum compressor flow over 120 lb/min. Will service 1200+HP.
# Wheel Dimensions: Compressor: 80.3 mm inducer, 115.8mm exducer, with exclusive Extended Tip Technology. Turbine: 95.5 inducer, 87.9mm exducer. Cast in Inconel 713 for high-temperature operation.
# Housing A/R: Compressor .66, with 5.5" hose-type inlet, and 3.0" hose-type discharge. Turbine: 1.32, with 'divided' volute, featuring 'T6-style' turbine inlet flange (4.438"x2.75"), and quick-release v-band discharge flange. Cast in ductile iron.
Posted By: Mr.Yuck
Re: turbo 408 - 05/21/10 07:46 PM
buddy runs a 100mm turbo on a 392 sb mopar. tube chasis Omni/TH3, should run 8's w/ 3.73 gears. Getting his lincense this weekend. So far he has run 137 in the 1/8 and 160 in the 1/4 on a 1000ft pass.
Posted By: Ian
Re: turbo 408 - 05/22/10 02:11 AM
man thats making good power what are the specs of the engine and turbo
Posted By: Mr.Yuck
Re: turbo 408 - 05/22/10 04:16 AM
Quote:
man thats making good power what are the specs of the engine and turbo
I'll get it for you by Monday. I do know it's a W-something motor. This guy used a cast piston 360 with a 510 cam, 4.10's w/ a pro-charger and went 10's w/ 8-10lbs of bost in a 67 valiant. Drove it to the track.
Posted By: Ian
Re: turbo 408 - 05/22/10 04:21 AM
thanks
Posted By: CW25
Re: turbo 408 - 05/23/10 12:13 AM
That S400 80mm will be a good match to the 408. You might want a 1.32 hotside depending on the RPM you plan to turn.
Posted By: Mr.Yuck
Re: turbo 408 - 05/23/10 02:42 PM
Quote:
man thats making good power what are the specs of the engine and turbo
Ok, here some info on the build. 340 X block stroked to 394. W-5 heads, 98mm Percision turbo,749 roller cam 262 @ .050 116 centerline. 8.5:1 CP heat coated pistons forgot to ask what intake & carb...I think it's a Holley HP series carb. 4000 stall, 3.73 gears. He said make sure you have no overlap in your cam and at least 112 or better on the centerline. He has yet to use the trans brake so his boost comes in late around the 100 foot mark. He is just leaving from an idle and dead stomps it. His 60 foot is about 1.75 (he'll be using the brake next time out and trying to get the boost at launch) Says the car should run low 8's at 170 or so. He's only pushing 12lbs of boost and has no coller. MSD w/ boost delay box. Has his timing locked in full at 35* and drops a degree for every lb of boost. He also said he could have only used a turbo in the 80's and ben fine.
Posted By: Ian
Re: turbo 408 - 05/25/10 02:50 AM
thanks guys we have decided it will be easier with twins around 62 any one recommend some nice priced turbos
Posted By: cold85
Re: turbo 408 - 05/25/10 01:21 PM
Quote:
thanks guys we have decided it will be easier with twins around 62 any one recommend some nice priced turbos
What makes twins easier?
Posted By: whiplash
Re: turbo 408 - 05/25/10 02:25 PM
See Rodney Dangerfield
"If ones got a problem, I don't have to deal with it...."
Posted By: Ian
Re: turbo 408 - 05/25/10 03:51 PM
Quote:
Quote:
thanks guys we have decided it will be easier with twins around 62 any one recommend some nice priced turbos
What makes twins easier?
no xross over pipe and the 65 a body would be cut up a fair bit to fit a big single , that beeing said i have only seen 3 a body v8 turbo pics
Posted By: Ian
Re: turbo 408 - 05/25/10 03:58 PM
my bay
Posted By: Ian
Re: turbo 408 - 05/25/10 05:38 PM
more pics
Posted By: cold85
Re: turbo 408 - 05/25/10 06:42 PM
Here is mine but I do not have a radiator
Posted By: Ian
Re: turbo 408 - 05/26/10 02:10 AM
fair bit more room in yours ,what do you guys think of the master parts turbos
Posted By: topfueldart
Re: turbo 408 - 05/26/10 06:35 AM
Master power? Twin T70's would make a bunch of power for cheap. A great way to go IMHO.
Posted By: gg408
Re: turbo 408 - 05/26/10 11:02 AM
Quote:
Master power? Twin T70's would make a bunch of power for cheap. A great way to go IMHO.
What size exh housing would you say and would you know what they spool up like?
What size waset gates?
Just out of curiosity could you run a single gate on a twin setup?
Am building same size and make eng and would like to know as I was considering S480 myself but they are 1 big turbo.
Cheers 
gg408
Posted By: Ian
Re: turbo 408 - 05/26/10 05:22 PM
george what times are you running did you use the 250 shot gas ,that you were going to run.
Posted By: CW25
Re: turbo 408 - 05/27/10 03:32 AM
If you want twins you can't beat the MP T70. Twins will work with room to grow.
Posted By: Ian
Re: turbo 408 - 05/27/10 05:59 AM
thanks, i have read good and bad about master parts turbo
Posted By: gg408
Re: turbo 408 - 05/27/10 11:02 AM
Ian
Never got it going NA with NOS. Changed my mind half way through the build.
Going in the same direction as you, did all the homework on the S400, found somewere to put it in the small eng bay that we have.
Will consider twins if its easier and I dont have trouble spooling it up.
Might have to make my way up to the Rat one weekend and have a chat, have some freinds up there that know you.
Told me to ask you which one of the Mclouds you were as he forot.
Hope that makes sense to you.
Cheers:
gg408
Posted By: Mr.Yuck
Re: turbo 408 - 05/27/10 01:08 PM
Quote:
Ian
Never got it going NA with NOS. Changed my mind half way through the build.
Going in the same direction as you, did all the homework on the S400, found somewere to put it in the small eng bay that we have.
Will consider twins if its easier and I dont have trouble spooling it up.
Might have to make my way up to the Rat one weekend and have a chat, have some freinds up there that know you.
Told me to ask you which one of the Mclouds you were as he forot.
Hope that makes sense to you.
Cheers:
gg408
depending on the rest of your parts you might not want them to spool up quick. 
Posted By: Ian
Re: turbo 408 - 05/27/10 03:37 PM
you tell flea bag lol {john} that matt and dave are comming for beers this weekend lol ,and he carnt catch them never none me the fastest street car in the rat and its a val lol. let me no when ya up .
Posted By: instigator
Re: turbo 408 - 05/28/10 01:24 AM
I had pair of MP t61's on a 408 with a lot less head and made enough power to go 5.60's at 128mph at 3500lbs.... Have a pair of 74mm gt42's with Indy 230cc now...I expect to pick up subtantial power!
Posted By: gg408
Re: turbo 408 - 05/28/10 02:25 AM
Quote:
depending on the rest of your parts you might not want them to spool up quick.
All forged rotating assembly, 8.6-1 comp, short fill block, ARP studs top and bottom, W2 heads, Indy intake, PG trans, 9" rear, leaf springs with 10.5 x 28 x 15" slicks.
Hopeing it all hangs together and goes like a cut cat.
Cheers:
gg408
Posted By: Ian
Re: turbo 408 - 05/28/10 04:46 AM
george pm me ya phone number so we can have a chat
Posted By: Mr.Yuck
Re: turbo 408 - 05/28/10 11:35 AM
Quote:
Quote:
depending on the rest of your parts you might not want them to spool up quick.
All forged rotating assembly, 8.6-1 comp, short fill block, ARP studs top and bottom, W2 heads, Indy intake, PG trans, 9" rear, leaf springs with 10.5 x 28 x 15" slicks.
Hopeing it all hangs together and goes like a cut cat.
Cheers:
gg408
back brace the rear and you should be fine. I was looking at my buddy's superbird the other day and was thinking wow I could hang 2 turbos up in the nose cone easy!...
Posted By: Ian
Re: turbo 408 - 05/29/10 12:54 PM
Quote:
I had pair of MP t61's on a 408 with a lot less head and made enough power to go 5.60's at 128mph at 3500lbs.... Have a pair of 74mm gt42's with Indy 230cc now...I expect to pick up subtantial power!
did you like the mpt what did they spool like did you make the 895 rwhp with them on it ,what was ya combo then thanks ian
If i had that engine combo i would choose a 88mm. For not much initial cost difference it will make more power than you want. If you decide later to wanna go faster crank the boost.. A 88 mm with around 400 ci would easily support 1200 or so hp
Posted By: instigator
Re: turbo 408 - 05/29/10 02:19 PM
Never a problem with the master power turbos....they were p-trims...started out with .68ar turbines and spooled up super fast.at the track just used a 2-step, no transbrake...the power was almost like a lightswitch, changed over to 1.15's and spool was more controlled but car went even faster at the track....
Motor was resto-block, callies crank, Manley pro-series rods, edelbrock heads, 245-245-.525 lift flat tappet, accel dfi, small liquid to air, 727, 9.5 PTC, 3.54 gears...
same shortblock now, but Indy 230cc,Indy intake, more cam, more turbo...
old pic-
http://s249.photobucket.com/albums/gg215...pg&newest=1
Posted By: Ian
Re: turbo 408 - 05/29/10 04:19 PM
thanks, my mate can get me a good deal on these
GT3582R a/r .70 ex 1.06 he seems to think 800 hp 12 lbs and max out 1200 range 20 lbs the cam will be 245/235 600 lift and 116 l/c
Posted By: Ian
Re: turbo 408 - 06/06/10 05:41 PM
got my turbos today very nice pair of GT3582R a/r .70 ex 1.06 ,what cam are yous guys thing i should run ,do you think these will spool nice on the 408 .thanks ian
