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89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

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Old 04-06-2011, 07:43 AM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

see if it will fit in
Priority Mail Medium
Flat Rate Box


Size: 13 5/8" x 11 7/8" x 3 3/8"
Old 04-06-2011, 07:50 AM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Just measured it, it's....

20.5" x 12" x 6"....
Old 04-06-2011, 08:13 AM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Dave, UPS is much cheaper. How is this, you offered me $40.00 for the delete box, but the carriers all want $20.00 plus for shipping because of your area and distance. Give me $50.00 shipped and it will be sent out today for you....
Old 04-06-2011, 12:38 PM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

sounds good pm ur paypal info,soon as i can ill run out and refill my prepaid credit card and send ya payment
Old 04-06-2011, 03:06 PM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

PM sent....
Old 04-07-2011, 12:17 AM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

rob going to have to wait 2 weeks till i get paid again, i just bought a complete tpi setup with lines and dizzy for 300 buck and ive been after a barrett .50 bmg and one came up i my area that i need to go take a look at.

if all goes well ill be adding one of these to my TOY collection
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Old 04-07-2011, 08:26 AM
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re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

haha yeah how could anyone pass up a barrett? wish i had more time 2 shoot
Old 04-07-2011, 10:11 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

well i prolly should have waited to find a vic jr efi and rails like i originally wanted but this car is going to be a daily driver so i just couldnt wait any longer to come across one at a good price, one i was wacthing on ebay with rails jumped to over 350 bucks add in the cost of "an" lines , a intake elbow and throttle body and it would have been dam near the price of an hsr so i said hell with it.

picked this up from a fellow board member along with the fuel lines coil/coil bracket/ and distributor for 300 bucks




some port work and it should be fine with the turbo since i plan on keeping the rpms below 6k
Old 04-07-2011, 11:19 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

some figures from somone who runs a 355 tt dragster with the same heads on another forum

cubes x rpm / 3456 = CFM
p2/ p1 ratio = 14.7 + "boost" / 14.7 ( this number will refrence to p2/p1 number on verticle axis on the turbo flow map)

400 cubes @ 6000 rpm / 3456 = 694 cfm @ 100% volumetric efficency

10 psi boost = 14.7+10 psi / 14.7 = 1.68 p2/p1
therefore
400 cubes @ 6000 rpm with 10 psi ...
694 x 1.68 = 1166 'turbocharged CFM"
now to make CFM > lbs of air per minute ....... multiply by .0691
1166 x .0691 = 80 .5 lbs

80.5 lbs of air = approx 805 hp
now he used 100% ve granted im more like 85% but just using his math as a figure
10 psi on 100 ve efficient motor would net around 805 hp

so my 5-600 rwhp goal should deffinatly be doable at around 15or so psi
Old 04-08-2011, 12:19 AM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

i know a ew ppl will wonder what this is all going to cost so heres a price list

gt45 turbo Price:$263.00
intercooler Price:$137.50
3" cold side Price:$68.99 includes couplers and clamps
bov's x2 rfl style Price:$26.98 x2
60mm wastegate Price:$55.00
injectors 85# Price:$480.00 set of 8
340lph pump Price:$150.00
megasquirt 1 v3.0 Price:$326.00 includes tunning cable and harness
misc hotside tubing Price:$130.00
shorty headers Price:$55.00
wideband Price:$100.00

for a grand total of 1764.45

i didnt not incluse the 300 for the tpi setup as this car originally had tpi on it, but the previous owner did a carb swap on it

if shooping around that price could come down as much as 600+$'s
Old 04-08-2011, 07:05 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
rob going to have to wait 2 weeks till i get paid again....
No problem bro, whenever you need it lemme know....

Originally Posted by project89
so my 5-600 rwhp goal should deffinatly be doable at around 15or so psi....
Let's make this interesting, first one to 600-RWHP on the dyno wins, your 400 vs my 305....
Old 04-08-2011, 03:15 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Whats the specs on the 400? Half decent heads/cam on a 400 with 15 psi is gonna make well over 600whp. My setup was at 640 on a mustang dyno with 12psi thru a huge stall (overstalled) converter and TH400. Thats not even fully tuned and my heads/cam arent big.
Old 04-08-2011, 03:28 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

I'm sure its got a cam in there, it would almost have to. Dave hasn't even said anything about the steam hole issue yet, but either way he should make some decent power though. I'd like to see that thing twin turbo charged to tell you the truth, especially if he's limiting himself to RPM, and if he wants this to be a daily driver....
Old 04-08-2011, 05:49 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
I'm sure its got a cam in there, it would almost have to. Dave hasn't even said anything about the steam hole issue yet, but either way he should make some decent power though. I'd like to see that thing twin turbo charged to tell you the truth, especially if he's limiting himself to RPM, and if he wants this to be a daily driver....
its deffinatly has a cam just dont know the specs on it,it had a real nice lope at idle,the twins i bought would choke 400ci at around 4500 rpms and going to larger twins would be really exspensive

Originally Posted by Street Lethal
No problem bro, whenever you need it lemme know....


Let's make this interesting, first one to 600-RWHP on the dyno wins, your 400 vs my 305....
deffinatly will,going to need that box here sooner or later so i can fit in a 4 inch downpipe

Originally Posted by Orr89RocZ
Whats the specs on the 400? Half decent heads/cam on a 400 with 15 psi is gonna make well over 600whp. My setup was at 640 on a mustang dyno with 12psi thru a huge stall (overstalled) converter and TH400. Thats not even fully tuned and my heads/cam arent big.
engine code denotes a 300 hp 400, but i do not know if the heads are original to the motor.
motor has 882 heads which stock have 170cc runners and just edge out the vette l98 aluminum heads in flow,heads on the motor have been machined for larger springs/lift and do have a mild port job on them

unkown at this time if the block has been overbored or cr

my limiting factor will more then likley be the tpi setup BUT
a member of the turbo forums just offered me a hsr setup with billet rails/regulator, 58mm bbk tthrottle body for 400 + shipping

so im thinking about selling the tpi setup for what i paid for it and grabbing the hsr setup
Old 04-08-2011, 07:34 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

TPI and twins sized for 4500 rpm should fit a 400 well
Old 04-08-2011, 08:05 PM
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Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Orr89RocZ
TPI and twins sized for 4500 rpm should fit a 400 well
the twins i have would kill the motor @ 4500 id have usable power range of 2000-4500 ish and then it would be all over

stage 3 turbines with .63 housings,they would be kind of iffy with a 350

the gt45 should be more of a 3000-6000 rpm turbo,though guys with 350s are reporting they spool up at 3k on those so i may get it to spool a lil sooner on a 400
Old 04-09-2011, 11:16 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

any idea of the specs on that gt45? if its got a p trim exhaust wheel itll choke that 400 as well. exhaust pressure will be up there. mpt76 q would be much better suited for that ci, even better pt76gts, alot of guys wouldnt use anything less than a t6 flange for 400 ci. although your goals are modest so idk. i had backpressure issues on my 383 with a single 72mm with a q trim wheel, it was close to 30 psi with 10 psi boost and constantly battling header leaks.
Old 04-09-2011, 03:10 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

the ebay gt45 has an 87mm turbine wheel and 1.05 ex housing,so it should be ok with my low power goals.
though the guys on the turbo forums are tellin me i will pass my 5-600 hp goals real easy with 400 ci and that turbo
Old 04-10-2011, 07:05 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Updates....????
Old 04-10-2011, 08:01 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

cleared the snow off the car and mocked up the flipped manifolds ds one wont work ps will but i need to get the heaterbox out of the car
ill post up some pics in a bit
Old 04-10-2011, 08:07 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Dave, which throttle body are you planning on running. I was just working on the dizzy correcting some of the wiring, and I'm looking over at the stock 48mm throttle body. Stock, they flow 668 CFM @ 1.5 in-HG (20.4 in-H20, as per TPIS), with an airfoil it jumps to 709 CFM, and that is more than enough for the 305. I think I'm going to stick with it....
Old 04-10-2011, 08:25 PM
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Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

im just going to use the stock stuff unless i buy that hsr setup with 58mm bbk tb
Old 04-10-2011, 10:51 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

heres my issues with the ds manifold, it hits the damn valve cover.
its a shame cause the hump in the manifold leaves alot of clearance for a downpipe

one i have for the passenger side fits perfect

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Old 04-11-2011, 06:31 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

That isn't a big deal at all, I had the same problem with the exhaust manifolds that I was going to run. Take the exhaust manifold to a machine shop, and have them resurface the flange on a "slight" angle to bring the buldge about a 1/2" to 3/4" of an inch away from the valve cover. That is what I did with mine when I had the Camaro after I cut, flipped then welded it together, and it worked fine....;

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Old 04-11-2011, 02:13 PM
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Car: 89 RS 89 iroc 87 firebird
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Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

hey rob what are those manifolds off of 2nd gen camaro right?
Old 04-11-2011, 03:23 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Yeah, I think they were used on Nova's too, just make sure you get two passenger side manifolds, and flip one of them. I brazed them, and it really holds up to the heat Dave, as the weld is extremely strong. I had the one I welded on that old fashioned clamp by Paul, and we bolted a turbo onto it to see if it would give. With a plasma cutter, we "hit" the manifold over and over until it reached temps upwards of 1200-degrees (used Paul's digital thermometer), and the weld still didn't give any. Buick turbo's bolt right up w/the three bolt flange (with just a little persuasion, of course). The first pic was just after the cut was made, but then I trimmed it down so that all three sides were seated flush...

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Last edited by Street Lethal; 04-11-2011 at 03:27 PM.
Old 04-11-2011, 03:54 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

lmao u dont want to sell those to me do ya
Old 04-11-2011, 04:03 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Downpipe on the drivers side is going to be a tight fit bro, let me put them on the 305 and take some pictures all around for you, and if you still want them they are yours. Here is a picture on the passenger side though, plenty of room for the downpipe (and that is with that AC delete box installed)....

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Old 04-11-2011, 04:42 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

looks good ill deff take them, im not getting the gt45 ive found a better turbo cheaper
tv7512

just pm me how much

anyways ive got a new hobby to bad its more exspensive then cars lmao
my girl just showed me how to reload my own amunition, hehe this is the first of my .45 reloads

lol i might have to leave a few of the hollow points on the dash when i start taking the car out and park it places might make a would be criminal think twice about messing with the car

and btw utah is the ****, i can carry my 45 every were except into banks,post offices and schools

though im going to take the 60$ conceled weapons class so i can get a cwp so i dont have to carry it unconcealed

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Old 04-11-2011, 07:18 PM
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Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

gauges
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Old 04-11-2011, 07:30 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Nice, you going to paint the plate black? Which boost/afr gauges are you planning on going with....?
Old 04-11-2011, 10:52 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
Nice, you going to paint the plate black? Which boost/afr gauges are you planning on going with....?
yeah that will be painted black and the rest of my gauges will be in the dash on this
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im usin an old laptop i have that the screen will be removed and then the rest of the laptop will be mounted under the seat.
this will be wired up to the display, along with the cars sound system.
then i will use a custom megatune dash on the screen as my gauges for boost afr rpm and speedo
Old 04-12-2011, 08:43 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
then i will use a custom megatune dash on the screen as my gauges for boost afr rpm and speedo....
You and that freaking Megasquirt, sounds like a damn **** movie for crying out loud....
Old 04-12-2011, 12:47 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

megasquirt and new turbo on the way

not going with the gt45 but a garrett tv series turbo instead, this ones capable of 1000 rwhp
Old 04-12-2011, 01:11 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

So your staying single turbo? What are the specs, and which Megasquirt, 2 or 3....?
Old 04-12-2011, 01:55 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
So your staying single turbo? What are the specs, and which Megasquirt, 2 or 3....?

megasquirt 2 v 3.57 smd with a complete bolt on harness
got it from a member of the boards here for 300 bucks shipped
im going to buy the ms3 processor and the msx 3x expansion board since they plug right in

then down the road i will convert to lsx cop ignition setup and sequential injection

the tv7512 is basically a t6 flanged t76,and is very easily upgraded to 91mm compressor wheel

its good for 1000+hp the way it sits

lol i just went biggggg and theres no going back now
new goal is 8's or bust trying
Attached Thumbnails 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build-ce-9fkqb2k-kgrhqqoknmez4bnvjl9bnrz1p-3bg  
Old 04-12-2011, 02:05 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
lol i just went biggggg, and theres no going back now....
That's what she said....

Originally Posted by project89
new goal is 8's or bust trying....
You better upgrade those springs bro, as that valve float will have you busting way before the 12's....
Old 04-12-2011, 02:10 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

valve springs r covered,just need to get an on the motor valve spring removal tool

btw pm me the price for those manifolds and the heater box i have some cash left over so might be able to just pay u for those now too
Old 04-12-2011, 02:14 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

That stuff will all fit in the same box, its just the exhaust manifolds are of course going to add weight. I had the delete box already wrapped, but I'll open it up and put the manifolds in too. Lemme know what you wanna give me for everything bro....
Old 04-12-2011, 02:25 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

see how much it wieghs and let me know the shipping cost
Old 04-12-2011, 05:23 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
see how much it wieghs and let me know the shipping cost....
Just got back from the UPS store, they quoted me $63.00 for the shipping after weighing everything. I would just go with the XS-Power single turbo setup and get a T4 to T6 adapter flange for it bro....
Old 04-12-2011, 07:18 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
Just got back from the UPS store, they quoted me $63.00 for the shipping after weighing everything. I would just go with the XS-Power single turbo setup and get a T4 to T6 adapter flange for it bro....
the xspower turbo header wont work the t6 turbo is massive hmm ill have to figure something out maybe ill just make my own headers
Old 04-12-2011, 07:51 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

I used the xspower twin turbo headers, just cut the flanges off and made a merge pipe.
Attached Thumbnails 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build-1003091640.jpg  
Old 04-12-2011, 08:02 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by turbo iroc
I used the xspower twin turbo headers, just cut the flanges off and made a merge pipe.
will a 4inch possibly a 5 inch downpipe clear those headers on the passenger side?
Old 04-12-2011, 08:13 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
will a 4inch possibly a 5 inch downpipe clear those headers on the passenger side?
Probably not without notching the framerail. I'm doing a 402 lsx with a Turbonetics t6 88mm and I want to fit a 4 in thru there. Also want to keep the Turbo in a similar location as I had before. 3.5 will definitely fit, I've seen 4 in fit with an aftermarket k member.
Old 04-14-2011, 08:23 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

just won my turbo on ebay
rebuilt tv7512 for 112 bucks woot
http://cgi.ebay.com/ws/eBayISAPI.dll...m=360357926975
Old 04-14-2011, 04:35 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

What a shame bro, cuz I was going to flip a set of stock exhaust manifolds and weld them up for you to run twins. Talk about room, the stock logs take up next to nothing, and a downpipe would easily fit. But either way though, nice score on the turbo....
Old 04-14-2011, 04:41 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
What a shame bro, cuz I was going to flip a set of stock exhaust manifolds and weld them up for you to run twins. Talk about room, the stock logs take up next to nothing, and a downpipe would easily fit. But either way though, nice score on the turbo....
im oing to look at a few junkyards this weekend and see if i can find a set,would be cheaper then haing u ship all that stuf fout.

still going ot get that heater box from ya though just waiting on the total from the guy on ebay so i can see how much money i have left in my paypal
Old 04-15-2011, 08:29 AM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by project89
im oing to look at a few junkyards this weekend and see if i can find a set,would be cheaper then haing u ship all that stuf fout.

still going ot get that heater box from ya though just waiting on the total from the guy on ebay so i can see how much money i have left in my paypal....
Whenever your ready for the box bro, just lemme know. I started test fitting the T76 on the engine, damn thing looks awesome. Was measuring last night and it looks like I'll be able to squeeze in a 4" downpipe without notching the frame. Lemme know when your Megasquirt gets there cuz I have a few questions about the connectors....
Old 04-15-2011, 03:31 PM
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build

Originally Posted by Street Lethal
Whenever your ready for the box bro, just lemme know. I started test fitting the T76 on the engine, damn thing looks awesome. Was measuring last night and it looks like I'll be able to squeeze in a 4" downpipe without notching the frame. Lemme know when your Megasquirt gets there cuz I have a few questions about the connectors....
tpi stuff is here, and the megasquirt is sitting in my po box just need to get to the post office and pick it up


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