89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
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From: Utah
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
lil bit of progress
some minor port matching and clean up work

and the presicion injectors installed to the intake, going to finish up the tpi system here in a lil bit
some minor port matching and clean up work


and the presicion injectors installed to the intake, going to finish up the tpi system here in a lil bit
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From: Utah
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
ITS ONLY A MATTER OF TIME NOW


im thinking 2 weeks tops till i have it on the street


im thinking 2 weeks tops till i have it on the street
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From: Utah
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
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Car: 88 camaro irocz
Engine: l98 tpi
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
i'd use a smaller screen but i'm waiting on this to run .great job so far
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From: Utah
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
that screen came on the turbo, i dont plan to use it at all, i live on the edge of the desert so it gets windy and dusty as hell here, this will have a full filter on it though im still trying to figure out placement of the turbo so i can fit a large enough filter on it
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From: Utah
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





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Car: 1988 Pontiac Firebird Formula
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
if you dont mind me asking what color is that blue looks great
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From: Utah
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
its kyrlon metal x blue paint sprayed over rustoleum metalic silver base coat, gives it a very deep metalic finish when the sun hits it unfortunatly my cell phones camera wont catch it, tommorow when im working on it ill bust out the good camera and snap a few pictures
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From: Utah
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 just got the manifold bolted on for the last time,but as i went to install the alt i relized the cyl head was cracked were the mounting boss is, there is no easy repair so this build may get a lil serious now
might say hell with a set of jy heads and just spring for a set of afr 227's with 75cc chambers
pics in a lil bit
might say hell with a set of jy heads and just spring for a set of afr 227's with 75cc chambers
pics in a lil bit
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From: Utah
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



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Engine: 3xx ci tubo
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
I can't see the crack and how deep it goes down to where the head meets the block. Just the missing cast around the thread is an easy fix. The old fuelie heads don't have that bolt hole so you had to make a bracket. The bracket just bolts to the exhaust manifold bolt holes and provides the alternator bolt nut. You have to trim down the long alternator tube to do it.
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From: Utah
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 can't see the crack and how deep it goes down to where the head meets the block. Just the missing cast around the thread is an easy fix. The old fuelie heads don't have that bolt hole so you had to make a bracket. The bracket just bolts to the exhaust manifold bolt holes and provides the alternator bolt nut. You have to trim down the long alternator tube to do it.
shhh with that trying to justify a set of afr's heads to the gf lmao
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
That looks pretty deep based on what I can see. At least through the whole rail. A set of decent heads would make this a hell of a lot easier. Quick79 on TTF had a factory 400 block he ran 5.65s in the 1/8 on with an S400 75mm and AFR 220s I believe. That's 8s pretty handily I believe and it was a 3400lb car. Throw an 88mm wheel in that turbo and things could get nasty fast.
Besides that I wanted to say I would get some sheet metal and make some ducting around that IC to the front nose. The tighter the better, it would substancially increase your efficiency probably.
Besides that I wanted to say I would get some sheet metal and make some ducting around that IC to the front nose. The tighter the better, it would substancially increase your efficiency probably.
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From: NYC / Jersey
Car: 1990 Trans Am GTA
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
I have a bare 882 cylinder head just sitting here if you need it; 1.94/1.50 w/76cc....
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Engine: 3xx ci tubo
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
well i just got the manifold bolted on for the last time,but as i went to install the alt i relized the cyl head was cracked were the mounting boss is, there is no easy repair so this build may get a lil serious now
might say hell with a set of jy heads and just spring for a set of afr 227's with 75cc chambers
pics in a lil bit
might say hell with a set of jy heads and just spring for a set of afr 227's with 75cc chambers
pics in a lil bit
For just a crack that shouldn't affect the head gasket I would just run the GMs and see what you can get out of it in my opinion. But I wouldn't turn down a set of AFRs for free either.
That TV7512 is a nice fit.
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From: Utah
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 took the day off from the car after finding the cracked head it got me really stressed and irritated.So today i said **** it im not touching the car and im going to have some fun





needless to say stress is gone and im relaxed so i thought about what i was go ing to do.i really dont need good heads to make tons of power.so im going to save the money and just but the mid mount bracket and backing bracket so i dont hae to worry about the bolt hole in the head, the brackets im getting completly do away with the mounting to the head, and is pretty much what bracket they used on the fuelie heads





needless to say stress is gone and im relaxed so i thought about what i was go ing to do.i really dont need good heads to make tons of power.so im going to save the money and just but the mid mount bracket and backing bracket so i dont hae to worry about the bolt hole in the head, the brackets im getting completly do away with the mounting to the head, and is pretty much what bracket they used on the fuelie heads
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Looks like fun out there. It is turkey season here right now and there is nothing like playing the game calling one in.
Good choice on the brackets. I think with the stock heads and the DD turbo you will make plenty of power.
Good choice on the brackets. I think with the stock heads and the DD turbo you will make plenty of power.
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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
well i only had a few mins to work on the car today so i rough cut out some material to fit the charge pipes , final routing is shown in the pics ,though i do hae to make the one tube longer to reach the tb




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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
so its 11 pm and u get bored what do u do ????




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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
the goal is to make it run today i hae about 6 hours before it gets dark out so it may just happen ,without the turbo of course


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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


bov arrived ,wasteate will be here tommorow
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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
wastegate showed uptoday ,header flanges were supposed to be here as well but fedex guys said they werent on his truck 
i finished up just about all the wiring stuck on 4 wires comming out of the bulkhead connector but i put up a post in the electronice section with pics to see if anyone knows were they go
post up some pics a lil later

i finished up just about all the wiring stuck on 4 wires comming out of the bulkhead connector but i put up a post in the electronice section with pics to see if anyone knows were they go
post up some pics a lil later
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
The BOV looks cool, what kind of gate did you use? Just an ebay knockoff or something else? I have 2 ATR gates here but I need flanges and springs for em and one needs a diaphragm. Am debating 1-2 ebay gates at this time tbh, it looks as if it's going to be 120 for the springs, flanges and one diaphragm to replace the bad one. Either that or I'm thinking of getting a sheet of the reinforced rubber from Mcmaster since they sell it and attempting to fabricate my own diaphragm.
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From: Utah
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
hks 50mm ebay knockoff they work just fine i paid 65 bucks shipped for mine with a 10 psi spring,though i am buying an assortment of springs as well 3.5 psi 7.63 psi 15 psi and a 21psi spring
if u want a link let me know and ill link u to the seller i got mine from ill post up pics soon as i finish sorting out this wiring
if u want a link let me know and ill link u to the seller i got mine from ill post up pics soon as i finish sorting out this wiring
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From: Utah
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
pics of wastegate as promised




Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
2 questions, can you provide me the diameter of the aluminum "can" at the widest point and do you know what kind of diaphragm these take as replacements/where to get one?
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From: Utah
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
the can is about 4inch in diamiter i cant get an exact measurement untill i change the 10 psi spring out of it, from time to time the diapragms pop up on ebay, but im sure an hks replacment fits it
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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
header flanges arrived today
just waaiting on my 1 5/8s mandrel bends, 3 bolt flanges and my t6 inlet flange
just waaiting on my 1 5/8s mandrel bends, 3 bolt flanges and my t6 inlet flange Thread Starter
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From: Utah
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
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From: Utah
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
tpi system, brand new precision 65# injectors, ms 2 v3.0 with COMPLETE PLUG AND PLAY HARNESS, and t6 76mm turbo all for sale 

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Car: 1989 Turbo Trans Am gta
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From: Utah
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
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Fight it Dave. So many times have I considered dropping the 305 build in favor for something better, either that or I went back and forth with fuel injection vs blow-thru so many different times. You got an excellent foundation there, so just get it done, see what you can get out of it, then do the other thing. My opinion, anyways....
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Unless you are going with a Little M I wouldn't bother going past getting that upgraded to an 88. It should have enough for that block and then some. Maybe make your headers with the 106 in mind but on a stock 406 block you're talking about dropping parts fairly handily I think.
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From: Utah
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
Unless you are going with a Little M I wouldn't bother going past getting that upgraded to an 88. It should have enough for that block and then some. Maybe make your headers with the 106 in mind but on a stock 406 block you're talking about dropping parts fairly handily I think.
dart block = 2,600 preped and ready to go
434 stroker kit = 1,500 includes rings bearing (though id probably toss the rings for a hellfire ring set
so for 4,100 bucks id end up with
a full forged 434 ci inch shortblock pretty much bullet proof 9.4--1 cr with 76cc chambers or 9.8-1 cr with a 64 cc chamber
and for another 2,100 a set of afr 220's which alone would make a really nice combo without the turbo
a fresh rebuilt 101/106 t6 turbo would run me about 1k
its really tempting but i need to sit down and think whats its really going to cost me to build the rest of the car to handle this combo and if im really going to want to street drive something like this on a semi daily basis
an lsx 101/106 turbo could do about the same but i havent messed with much lsx stuff other then boltons really, so what would it cost to do an lsx thats comparable to my planed 434 build ???
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
You're probably talking a glide or a T400 (thinking glide) and a good converter, a Dana 60 or a 9" out back too, a full 25.X cage and a chute, probably brakes too. Realize it's extra weight but maybe a BBC? JMO lock the combo down with what you have (chassis etc.) You could have 8s with a comp wheel upgrade if everything holds. Don't forget your safety gear if you ever intend on taking it to the track and a massive fuel pump to feed the power that you're looking at. Doubt a single A1000 would do it even with a carb even though feel free to correct me on that one.
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From: Utah
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 said screw it im sticking with what i have. besides the iroc i also have a 87 firebird that i am swaping the 305 for a 3.0L v6 with a 75mm turbo. so i really dont have a need to do anything crazy with this car. not to mention this whole combo could be pushed into the 8's with probably just a compressor wheel upgrade.
in all reality for a street car u dont need anything more then that.and even 10/9 second car is to much for a street car
so yesterday i finished cleaning and painting the engine bay. and i also completly redid my entire megasquirt harness since i was unhappy about how it fit and the crimped connections on the wires. so i redid it to fit just how i wanted it to and got rid of all the crimp conections and soldered everything.
(got the harness premade from another board member )
today im going to reinstall the ms,finish the coldside, and finalize the mockup on the hotside before i start welding it together
in all reality for a street car u dont need anything more then that.and even 10/9 second car is to much for a street car
so yesterday i finished cleaning and painting the engine bay. and i also completly redid my entire megasquirt harness since i was unhappy about how it fit and the crimped connections on the wires. so i redid it to fit just how i wanted it to and got rid of all the crimp conections and soldered everything.
(got the harness premade from another board member )
today im going to reinstall the ms,finish the coldside, and finalize the mockup on the hotside before i start welding it together
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From: Utah
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
im keeping what i got,instead of building a motor im going to spend the money on the chassi,stuff like suspension, rollcage,subframes,chute etc etc etc.
im only into my hotside for a grand total of 72$'s
thats for the header flanges,primary tubing, crossover tubing, which i have all mocked up but my new welder wont get delivered till the next tuesday the 24th grrr, but its alright its supposed to rain the next 4-5 days anyway
ill have to add in the cost of 2 pairs of 3 bolt flanges, and a t6 inlet flange to the hotside total.
downpipe cost will probably be around the same i need to pick up the vband assembly and a 5 to 4 inch reducer
anyways i got the engine bay painted (need to touch it up a lil bit )

soon as the car is together im going to finish the body work and its going to be sprayed with this color combination
this silver for the flames

and this blue for the car
im only into my hotside for a grand total of 72$'s
thats for the header flanges,primary tubing, crossover tubing, which i have all mocked up but my new welder wont get delivered till the next tuesday the 24th grrr, but its alright its supposed to rain the next 4-5 days anyway
ill have to add in the cost of 2 pairs of 3 bolt flanges, and a t6 inlet flange to the hotside total.
downpipe cost will probably be around the same i need to pick up the vband assembly and a 5 to 4 inch reducer
anyways i got the engine bay painted (need to touch it up a lil bit )

soon as the car is together im going to finish the body work and its going to be sprayed with this color combination
this silver for the flames

and this blue for the car
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Wow, those are some serious cheated cuts. Are you going to clean them up first? The engine bay looks good. Let us know how you like spraying that Kirker paint. Are you using the urethane or acylic?
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From: Utah
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
those were mock up peices to see how close i could get the logs to the head/valve cover for downpipe clearance.
im using 1 3/4 90's i got from an ex shop even though my flanges are only 1 5/8's the reason being is were im cutting them on the bend is the metal is shrunk down to just over 1 5/8;s
lil bit of hammer work on an anvil and they drop right into the header flange , soon as it stops snowing and raining ill go get sone pics of the actual tubes im using
the paint is eastwood urethane paint ill deffinatly let u know how it comes out, but car craft did a write up on the stuff along with summit paint and the results of the eastwood stuff was good
im using 1 3/4 90's i got from an ex shop even though my flanges are only 1 5/8's the reason being is were im cutting them on the bend is the metal is shrunk down to just over 1 5/8;s
lil bit of hammer work on an anvil and they drop right into the header flange , soon as it stops snowing and raining ill go get sone pics of the actual tubes im using
the paint is eastwood urethane paint ill deffinatly let u know how it comes out, but car craft did a write up on the stuff along with summit paint and the results of the eastwood stuff was good
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Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Sounds like you are going to squeeze a 3.5 or 4" down pipe in there. I forget the part number for the exh outlet flange and band clamp, but I ordered it from rockauto once I got the part number from the Walker HD accessory catalog. I have the part number around here somewhere if you need it.
What did you order for a welder?
What did you order for a welder?
Junior Member
Joined: May 2010
Posts: 47
Likes: 0
From: bethlehem pennsylvania
Car: 89 iroc single turbo
Engine: 383sbc 76mm turbo 402ci ls 88mm (in
Transmission: tko500
Axle/Gears: 8.5 10 bolt 4.10 gear 28 spline axl
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Sounds like you are going to squeeze a 3.5 or 4" down pipe in there. I forget the part number for the exh outlet flange and band clamp, but I ordered it from rockauto once I got the part number from the Walker HD accessory catalog. I have the part number around here somewhere if you need it.
What did you order for a welder?
What did you order for a welder?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
Very good build so far. I like what your doing 
If you could get that motor for that your doing good. I got 1800 into my SHP block fully machined and I think another 2800 in rotating assembly/balance work/studs/rod bearings/main bearings/machining on rods/bolts/etc and shipping to my house (shipping rotator only, block was free shipping!) To get all that on a Lil M block would be a steal. I thought I paid 4664 shipped for all my parts for shortblock... alittle more than I wanted to spend.

i didnt plan on factory parts at all
dart block = 2,600 preped and ready to go
434 stroker kit = 1,500 includes rings bearing (though id probably toss the rings for a hellfire ring set
so for 4,100 bucks id end up with
a full forged 434 ci inch shortblock pretty much bullet proof 9.4--1 cr with 76cc chambers or 9.8-1 cr with a 64 cc chamber
dart block = 2,600 preped and ready to go
434 stroker kit = 1,500 includes rings bearing (though id probably toss the rings for a hellfire ring set
so for 4,100 bucks id end up with
a full forged 434 ci inch shortblock pretty much bullet proof 9.4--1 cr with 76cc chambers or 9.8-1 cr with a 64 cc chamber
Junior Member
Joined: May 2010
Posts: 47
Likes: 0
From: bethlehem pennsylvania
Car: 89 iroc single turbo
Engine: 383sbc 76mm turbo 402ci ls 88mm (in
Transmission: tko500
Axle/Gears: 8.5 10 bolt 4.10 gear 28 spline axl
Re: 89 Iroc Sbc400 TPI Megasquirt Single GT45 5-600 rwhp build
You can do an ls motor for about the same price or cheaper. Its one of the reasons I didn't rebuild my 383 SBC.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
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
Sounds like you are going to squeeze a 3.5 or 4" down pipe in there. I forget the part number for the exh outlet flange and band clamp, but I ordered it from rockauto once I got the part number from the Walker HD accessory catalog. I have the part number around here somewhere if you need it.
What did you order for a welder?
What did you order for a welder?
i could deffinatly use the pn for the vband and the vband flange
i ordered up an ac/dc tig machine from harbor frieght , but besides that i got a miller mig and a harbor frieght flux mig









