8.5:1 with 16 pounds of boost, super victor, CSU carb, vortec heads with 2.02/1.60 valves and mild port work, Lunati hyd roller with 232/242 .510/.525 110LSA.
Will be using ebay stainless headers and then fabbing up an intercooler system and using methanol injection.
What kind of power would this combo make as listed, through a T56?
__________________ 1985 IROC-Z SILVER- WC-T5, Needs an LS1.
How big a motor? Assuming 355 ci I'd say around 620rwhp or so, mostly limited by the turbo running out of breath. I'm building a similar but milder combo right now and should have it to the dyno by the middle of next month.
DAMN! THAT MAKES ME FEEL GREAT!!!!! I HAVE BEEN TELLING EVERYONE that EXACT figure!!!!!!!!!!!Im doing it. That will be PERFECT! Use about 10lbs on the street for about 550-580rwhp! AWESOME! Im DOING IT! Yes, I would be pretty much yelling right now. Im stoked.
What is your setup???????
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Would an 88mm be too much????
Last edited by z28freak84 : 06-23-2008 at 06:36 PM.
Reason: Automerged Doublepost
Just slightly. I mean, it'll work, but it will lag more and such.
I would go with a S400 from Dave@majestic turbos. Get one with a T04 .96 exhaust housing and let it go. IIRC, Its a 72mm (inducer) turbo that will go to about 850-1000hp.
I don't think the S400 comes with a T4, it would choke the flow too much (call Dave at Majestic though as he's a BW expert and a good vendor.)
I'm hoping for around 450rwhp @ 8lbs and eventually 500rwhp at 10-11lbs. Mine is purely a street car that will stay under 5700rpms while retaining good manners and reasonable milage.
I don't think the S400 comes with a T4, it would choke the flow too much (call Dave at Majestic though as he's a BW expert and a good vendor.)
I'm hoping for around 450rwhp @ 8lbs and eventually 500rwhp at 10-11lbs. Mine is purely a street car that will stay under 5700rpms while retaining good manners and reasonable milage.
I dont think it will choke it tooooo bad. I mean, I would think it would flow 700-750hp on the exhaust side. If he wanted to go big then yes I would go with a T6 with a 1.0x a/r.
Well, I would like to end up as close to 1000rwhp as possible in the future with a different head and cam combo and maybe a 383ci.
The 1.10 A/R backpressure will be too high for that goal. I would go with the 1.32 A/R housing. Once you narrow in on your HP goal then you can use the Garrett turbine flow maps and compare the BW exhaust wheels and housing A/R to see how much HP the turbine will flow. The 1.10 A/R turbine and 1.32 A/R have different exhaust wheels. The 1.10 A/R has a wheel comparable to a Garrett GT4294 and the 1.32 A/R wheel is closer to the GT45 series.
Well, I would like to end up as close to 1000rwhp as possible in the future with a different head and cam combo and maybe a 383ci.
1000hp? If you want that to be reliable be prepared to spend around $10,000 in a motor. These are rough guesses. I might be off a few pennies here and there.
Dart block 2300
Oliver rods 1400
Lunati Dragonslayer crank, probably 1000
Dished pistons, probably 1000
Headstuds 150
Headgaskets 200-300
AFR 195 eliminators, like 2200 with competition port and full options
Thats roughly $8000-8500 in just big stuff. Thats not all the gaskets, cam, lifters, intake, carb or EFI, machine work, assembly (in this case, if youre not a experienced builder, dont bother) oil system, cooling system, SFI damper, transmission to hold that power. Good god I can keep going.
Im wondering how much RWHP I could achieve with a forged 355ci. with some UNported Vortec heads, super victor, CSU carb, lunati hyd. roller 232/242 .510"/.525" 110lsa 9.0:1 and 14-16psi. intercooled?????
will also have beehive springs with titanium retainers and 1.5 roller rockers.
Yes they do they are the s-400 sx they come in t-4 flange however they are roughtly 3x the amount of a t-6 flanged s-400
Quote:
Originally Posted by z28freak84
Im wondering how much RWHP I could achieve with a forged 355ci. with some UNported Vortec heads, super victor, CSU carb, lunati hyd. roller 232/242 .510"/.525" 110lsa 9.0:1 and 14-16psi. intercooled?????
will also have beehive springs with titanium retainers and 1.5 roller rockers.
My first motor was a 9.1:1 355 with mp t-70. afr 195 heads, vic jr, and a 228/228 cam. On 14 psi with 94oct. and 17* timing it put down 580rwhp. The second motor was the same rotating assembly but i had a "half fill" done on it and splayed main caps. I also upgraded to a 76mm. on 18psi and 110 oct i was right at 700whp. a good block with splayed caps and a short fill will hold up just fine to 1000hp if the tune is good and the RPMs stay below 6500. I would suggest you change that cam, you'll be much better of with one on a 114 LSA. I dont see why a VERY conservative and streetable setup like yours wouldnt make 500whp.
New Question...How much horsepower will a 8.5:1 383ci with 270cfm Ported Vortec heads and a 242/248 .5xx/.5xx" support? 700rwhp, 900rwhp? how much? I'll take all I can get.
