87 Iroc-Z 383 LT1 Turbo Build

[Jay_rich]

Well I figured I would start yet another build thread on a board haha, All my other ones are a continued build from last years setup.
I just got done the headers yesterday, now to find a place for the turbo, thinking of converting the waterpump back to stock and back to a sinlge timing chain…but gonna try to work around it.

This is more current

Last year’s

383 LT1
Splayed 4 bolt
Eagle crank
Eagle H-beams
JE -28ccPistons
LE2 Heads
Comp Custom Turbo Cam
Ported LT1 Intake
Twin 58mm TB
60# injectors
Stock PCM
9.8ish compression

TH400 rev man/Trans Brake
Stock 10 bolt 3.42

1 5/8 log headers
50mm XO2 wastegate
DSM dual BOV’s
Garrett TH08A64 (74mm T6 flange)
31x12x3 intercooler

8psi…91 octane RICH tune (leak in crossover wouldn’t make more the 8psi)
583rwhp@6250
491rwtq@6170


NEW SETUP

383 LT1
Splayed 4 bolt
Eagle Crank
Eagle H-Beams
Je -28cc pistons
AFR 195 heads ported
Single Plane intake (super vic style)
FAST 1375cfm 4bb Throttle body
60# injectors
MSD-8366 dizzy
Megasquirt II
8.65:1 compression

TH400 rev Man/Trans Break
Moser 9inch 3.00 spool

1 5/8 Tubular Headers
Synapse 50mm wastegate
Tial 50mm BOV
Garrett TH08A64 (74mm T6 flange)
Meth

Goal:
15-20 PSI pump&meth/race gas
700-850 RWHP
9.XX ¼ mile J
http://i126.photobucket.com/albums/p87/Jay_rich/DSCF0004.jpg
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[Chris]

Looks like a great build , Where did you get those headers from, Any chance if you know if they fit in a 4th gen?

[Jay_rich]

Looks like a great build , Where did you get those headers from, Any chance if you know if they fit in a 4th gen?
I made them :P, flanges and all. They wont fit around the accesory bracket since im deleting everything, I could have built them to go around it but didnt bother, the accesory takes up so much room and is ugly haha. i wish i had a 4th gen to work with so I could make them fit around the shock towers and start to sell them!

Jay

[86LT1]

awesome looking car, thats going to be a mean setup when your finsished!

[Jay_rich]

Well my summit order is in....definitely going to need a cowl hood now :(.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/DSCF0013.jpg
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[dsmawd350]

are you going to be using a blow thru carb hat?

[tomsws6]

I made them :P, flanges and all. They wont fit around the accesory bracket since im deleting everything, I could have built them to go around it but didnt bother, the accesory takes up so much room and is ugly haha. i wish i had a 4th gen to work with so I could make them fit around the shock towers and start to sell them!

Jay


ill let you work on mine...:laugh::laugh: great build:hail:

[justanlt1]

thats just sexy looking ill +2 you can work on mine too lol

[Jay_rich]

Yes I am going to be using a Extreme velocity carb hat. Thanks for the good words.

Jay

[CamaroGirl]

lt1 in 3rd gen=sex
thats gonna be one killer car when you're done, hope you've beefed up your suspension ;)

[Toronto_LT1]

nice build,it's gonna be a runner when done.i really like your wheel and tire combo.
good luck with everything and keep the pics coming.

[Jay_rich]

well a I havnt dont much work as the garage is cold as fuck and I just started insulating. And havent got my heater. Right after xmas im going to finish the garage and put the heater so it will be ball out then!

Anyways I cut the rad supports out in place for a nice thick 1 1/4 bar and a 1inch bar at the bottom to mount the turbo and give more body support.

There shouldnt be any issues with heat where the turbo is as I have the turbo blanket and have about 4inches from the Fans and the waterpump.

I am also waiting for my V-bands and my Extreme velocity Car hat to come in to finish the hot then cold side.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/radsupport-1.jpg
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[Fastbird]

Looking good man. I Know what you mean about a cold garage. Mine is insulated and it's still cold as balls in there.

[Pony_Killer]

That's going to be a mean SOB!! Makes me wish I still had my iROC

[Jay_rich]

Well the Extreme Velocity Oringed carb hat came in...on a sunday!

Wow need new hood BIG TIME.


Jay

http://i126.photobucket.com/albums/p87/Jay_rich/carbhat2.jpg
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[DMBlack]

Nice Looking ride. Can't wat to see it all finished up. Love those third gens.

[dsmawd350]

Is That the super victor? If you wouldve went with the victor jr you probably would of been ok on hood clearance. I went with the vic jr and it's not near as tall as that one.

[Jay_rich]

Well today I got all the seats out (pending sale) and Made the merge for the turbo! I decided to make it divided for future turbo swap (S400-S480-S485) Since they are divided.

I will add the wastegate after all the hot side is done.

Still waiting on my damn v-bands to come in so I can start.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/dividedmerge2.jpg
http://i126.photobucket.com/albums/p87/Jay_rich/Dividedmerge1.jpg

[chevymec]

Looks like its gonna be a nice build!!

[dsmawd350]

Do you know what the theory is behind a divided housing turbo. It's not going to do anything for you without being used the correct way

[Jay_rich]

Do you know what the theory is behind a divided housing turbo. It's not going to do anything for you without being used the correct way
yes I do, divided turbo's will spool quicker, some say with V8s it doesnt matter but any little bit helps. I also divided the center to help with flow into the turbo, smoother transition. I didnt cut my flange with the divider but its not hard to weld a divider in later

Jay

[dsmawd350]

divided housing turbos are in theory supposed to spool faster but only if you use the divided housing like it was inteded. On a v8 the 4 cylinders that fire on the same stroke are supposed to be routed into one side of the turbo, and the 4 the fire on the other stroke routed to the other side. Kindof hard to accompish on a V8. The main benefit to them would be running a bigger turbo on a 4cyl. Then a tubular mainfold can route the cylinders that fire together into seperate sides of the manifold. It Lets the two cylinders that fire together be routed into on side of the divided housing to keep velocity up and alternate between strokes

hope i explained that well

[Jay_rich]

I finished the crossover minus the wastegate bc I need some pipe for that still. The heads are going out tomorrow to be machined to insure they are flat and glass beaded then washed.
Im suppose to get my picker thursday so I may Yank the motor this weekend and reassemble it, then repaint the entire engine bay!

I ended up trading my intake for the head work since it was around the same price, Im gonna get an efi intake since I didnt know the company made one.
OR a vic jr and keep the stock hood.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/DSCF0036.jpg
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[ws6nighthawk]

beast as hell. now i wanna see how the cold side is going to snake its way through there. coming along nicely.

[Jay_rich]

beast as hell. now i wanna see how the cold side is going to snake its way through there. coming along nicely.


Ya its gonna be interesting...prob over the header

Jay

[Tricked-Out-Toy]

Damn dude your on another build! Im still on the same one that I started around the time you started your first one! looking good and its def getting better every time!

[Jay_rich]

hahaha thanks man! Yea shit changes alot around here, always gotta go bigger and better :P show all the LSx guys around here whats up haha

Jay

[Jay_rich]

Well got some small things done today.

I made some rad mounts, but ran outta steal so couldnt make my bottom mounts.

I got the trans all unbolted and everything off the motor to make it easier to pull.

Also painted my Synapse 50mm wastegate and kinda rebuilt it all. The owner before has an issue controlling over 20psi. So I take it apart, all the vacuum fittings were like 2 threads in then JB welded, and its a 50mm gate so 2inch in/outputs he welded some 1 3/4 pipe in it.

So i got EvilTom to weld some AN fittings on the gate and I opened the V-bands up to accept the 50mm pipe and changed the bushing inside to match. also cleaned up the inside and now the gate opens 100% not like before where it only opened like 75%

Next step is yank the motor thursday then take it all apart and replace every seal, then drop the suspension and repaint the entire engine bay!

Hopefully the motor will be back in the car within the month, so I can keep everything on track!

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/synapse50mmgate.jpg
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[turbocaprice]

Nice build!! What are you running for accessory brackets?

[Huff035]

Sweet build! Is it going to be done for the shootout?

[Jay_rich]

well i was so far, got the motor out, cylinder 1 has some scoring (prob due to the rings bcing gapped for n/a for the previous 3 seasons)
So for peace of mind I a yanking the motor apart and sending it in for a hone and new bearings and rings.
More money I dont have... car may get delayed some, but at this point goal is really have it done and tuned for LTx shootout in september.
In the mean time I will finish the engine bay and paint everything then work on the cage untill i come up with funds for the motor.

Jay

[Jay_rich]

Well I got quoted 1100 (rough quote) If I take it in and he does the tear down and rebuild including the parts needed and hot tanked etc.

Since the motor is at a hault I started the engine bay, I ground it down to bare metal (what is primed)

Also finished up my rad mounts, it is now solid it doesnt move one bit!

Also heads are all finished, and took some pics of the cylinder wall it isnt too bad but worth going over.

Jay

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[Jay_rich]

oh look what fits!!

NOTE INTAKE WAS JUST TEST TRIAL BORROWED (as it is carb and not EFI)

No cowl needed with a victor JR, I didnt wanna go the JR route but I think I will achieve my goals on the jr.

Also I got my megasquirt 2 V3.0, Just ordered my harness and USB cord also.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/DSCF0047-1.jpg
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[383Z28]

nice build!

[Fastbird]

That's awesome that the Vic fit!

[dsmawd350]

oh look what fits!!



told you the victor jr would fit LOL. and im sure you will be just fine on a jr. madman and omahar berry went 8.55@167 with a vic jr

[turbocaprice]

I have a thread asking how the Vic intake ports ligns up wth LT4 head ports. Saw you are runnin that combo an jw how it ligns up. And what CC heads are you running to get 8.6 CR?

[Jay_rich]

They are AFR 190 65cc heads with a -28cc piston and a .042 compressed gasket, also zero decked.

Im awaiting to buy my intake and i am gonna check the ports and match them.

Jay

[trev_97ta]

looks good man i like it

[Jay_rich]

Well busy week so far!

I dropped the K-member and a-arms off the car.

Painted the K-member, polished every single bolt that came off the car so they look shiney new again. The re-painted the engine bay and underside of the hood.

I also started the body work on the car (hood so far)

Also my Megasquirt harness arrived as well as all brand neww ball joints, tie rods (in and out) idler arm etc.

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/frontendparts.jpg
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[Jay_rich]

Well put the motor in again for the 3rd time to test my new badass (i think bc its free and uses the tensioner) alt relocation setup and it is my own design or at least i think since i have never seen anyone do it.

Also took a pick of what i have got done on the car so far...

Motor will stay in until I get the megasquirt and wiring done then come back out for machining.

Which I am thinking im gonna have to go .040 over to clean up the score marks since it has been honed at .030 over already. So new diamond -31cc fored induction pistons may go in!

Jay

http://i126.photobucket.com/albums/p87/Jay_rich/altrelo1-1.jpg
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[Jay_rich]

Well the scratches on the cylinder 1 didnt clean up so I am sellig my JE's and putting in some Diamond 4.040 pistons (11428)
Also I have preped the front half of the car (for the most part), So I figure while I am waiting for the engine I will get the entire car primed and ready to get painted. Then send it out for some colour when the motor comes back.
Also I am working on the cage.

Jay

[Jay_rich]

well the project is over...well for the LT1, I am selling everything LT1 and going LQ4 or LQ9. Found a crack in the crank and am not gonna spend 3000 outta my pocket on the lt1.

EVERYTHING FORSALE !!!

Its all listed in the general sales.

Jay

[Tricked-Out-Toy]

Damn dude! that sucks. Im with ya on getting rid of the LT1 tho. If and when i toast mine ill be doing a twin setup on a LSx. Ive almost done it a couple times but I figured I had better finish this build and at elast drive it once before I ditch it all lol good luck on the new build!

[Tricked-Out-Toy]

How much for the Damper?

[Jay_rich]

damper is sold so far, guy sent me the money but said hold off on shipping haah

Jay