Lexus IS Forum banner

41 - 60 of 175 Posts

·
Registered
Joined
·
272 Posts
Discussion Starter #41
I got busy and replaced the compressor, charged the system and went out for a drive. The A/C condensor immediately blew out in spectacular fashion. No, I didn't overcharge it. I've removed the old condenser and will be getting a new one next week. Definitely too hot to be driving without my air.

I also was blowing big oil clouds at high revs - After major freaking out thinking my new engine was somehow hosed, found lots of oil in the air filter pipe - Turns out that I don't have a big enough restrictor in the turbo feed line. My .060" restrictor was fine in my old engine but the new one obviously produces more oil pressure. Justin at Comp Turbo says that a.020" hole is right, and is sending the correct restrictor fitting along with a small filter for the oil feed.

I was trying to make the Titan Dyno day Saturday but...
 

·
Registered
Joined
·
272 Posts
Discussion Starter #43 (Edited)
Well, the A/C is fixed and now it keeps the belt on - The turbo oil restricter (homemade from a .023" MIG tip screwed into an AN fitting, then filed down) is installed and no more oil blowing from the turbo, although there is still some oil smoke in the exhaust that I hope will be gone after rings have worn in...Idle and free-rev tuning resumed, and I find that the smoother I get the idle, the quieter my Tilton clutch's rattle becomes. That noise level is very tolerable now - it had me concerned initially. My LS2 truck coils -on plugs- working well. Before I can even pull out of the garage it overheats and the radiator overflow tube starts gushing. Damn electric fan has failed and put a nice mark on my brand new Koyo radiator. I've ordered a new Flex-a-Lite dual fan - should be here this afternoon.

Very frustrating - I have limited time to work on this thing and keep having stupid things to fix.

Delayed gratification sucks.
 

·
Registered
Joined
·
272 Posts
Discussion Starter #45 (Edited)
Getting There...

Finally got my turbo oil feed and cooling fan issues squared away (took Comp Turbo 2 weeks and 2 shipments to provide a restrictor -.014":suspiciou - and filter) and did did some driving today. The engine was blowing lots of oil from the exhaust and breather, and the restrictor didn't eliminate as much as I had hoped. The quantity of smoke/blowby had me worried that I had a ring sealing problem.

After a few non-boosted light pulls/backdowns to wear in the rings the blowby is gone and I am greatly relieved. Now that oil is no longer affecting the mixture I can begin seriously tuning. I'm very impressed with Haltech's ECU Manager software for the PS2000, especially the VE tuning method. My first try at a base tune started the engine and ran it surprisingly well.

The inevitable small leaks and wiring glitches are fixed and for the first time I'm feeling good about the project. A totally new built engine, reworked harness, unproven coils/ignition system, and fuel management brought so many changes that there was lots to worry about.

I'll do a build thread with dyno when time permits.
 

·
Registered
Joined
·
272 Posts
Discussion Starter #46 (Edited)
This car has an extensive and varied history. More on that later.

Prior to late 2007, I had never noticed an IS300, didn't even know they existed. I was , however, a big fan of the 2JZ, having set up Electromotive EMS on a couple local 2J-powered race cars.

I run a small shop part-time, and adam/vinnygamz, hearing of me at the dragstrip, brought this car to me. Seems they had had various people working on it, and there were some odd things (to be polite) done to it that had to be corrected. The car didn't run - turned out to be a broken coolant temp sensor, likely damaged when the nice sheetmetal manifold was installed.

I was impressed with the cool parts on this car - Innovative Turbo T67, V160, Supra diff, HRE wheels, Tein coilovers with EFDC, GE motor with GTE rods/pistons,etc, etc. - Fell in love with the package when I got it going and after tweeking the tune to a reasonable state. Vinny was wanting to sell the car and I took it off him.

I steadily eliminated various kludges from the car, making it more reliable and and refined. Some of these were:

An Aeromotive A1000 inline pump mounted directly under the driver's seat, screaming away while pulling from only one tank. The nice PHR pump hanger had been stripped of its walbro and a direct pickup in the main tank had been rigged, also eliminating the jet valve to pull from the second tank. A pair of Walbros went in.

There was a horrible exhaust resonance at cruise -A really nasty sounding Borla muffler on rusty crush bent piping was replaced by two Magnaflow mufflers, one as a resonator, and all stainless 3" pipes.

The fuel lines were scary - I found a piece of aluminum hardline feeding the fuel rail feed that had a pinhole developing from rubbing on the chassis.

Lots of other minor stuff was fixed as time went by, and I was enjoying the car as I gradually brought it up to my standards.

I decided a bigger turbo was in order, and changed out my T67 for a Comp (nee Innovative) Turbo CT43-72 triple ball bearing unit, and found that even with a .84 hot side (compared to the .7 on the old one) the new big turbo had about the same spool as my old journal bearing T67, but with a nice increase in the top end hit.

One day while refining the tune for my bigger turbo, I shut the engine off the make some changes to the fuel tables. Did that and went to start the engine, and ...nothing. Shit, the engine is locked up, I say. Battery is good and starter grunting, but no rotation. I get the car towed home and begin the parts collection process for a new motor. I'll continue with the car history engine build next, but I have already posted my parts collection process here:

http://my.is/forums/f114/engine-under-construction-396034/

and my adventures getting it going here:
http://my.is/forums/f114/lives-416090/

couple pictures-



I'll continue documenting my mods in subsequent posts.
 

·
Moderator
Joined
·
10,234 Posts
I believe this was originally Aldo old car. If so, from day one this car was a hopeless creation. But I am glad it's in the hands of someone who knows what he is doing and have done justice to such a car with such horrible history.
 

·
Registered
Joined
·
272 Posts
Discussion Starter #48
Whew, the above post disappeared for a while and had me worried!

I would be greatly interested in hearing member's stories about this car - I've heard some of them at various meets around Florida - Big infamy it seems - Although there is a respectable 1/4 mile time reported by "L-tuned and boosted". I plan on exceeding that, btw.

While searching on "IS300" I found this -

B.I.G. Motorsports.Project Cars.IS300

I believe this is my car - It had the same goofy lettering on the rear when I got it, also that very same strawberry air freshener hanging off the mirror:rolleyes:

The bigmotorsports build claim is contradictory to what baadhabit and tsop have told me - i.e. that the car was originally built by Peter Farrel. Maybe Big just peed in it.
 

·
Moderator
Joined
·
10,234 Posts
Correct, the car was originally built and tuned by PFS original owner, Peter Farrell. Those pictures look like pictures taken by the 2nd owner, the guy who purchased it from Aldo. I remember him trying to sell the car with those pictures and also the huge gash on one of the wheels.
 

·
Registered
Joined
·
272 Posts
Discussion Starter #50
LS2 truck coils-on plug

These shoud be self-explanatory:










The 6th picture shows the parts removed from the Supra coils that go onto/ into the GM coils.
 

·
Registered
Joined
·
272 Posts
Discussion Starter #52
The LS2 coils have internal igniters. The Haltech will fire them directly. No other igniters needed to run the engine. I still have my stock igniter in place to provide inputs to the stock ECU for fuel gauge,etc. but its coil outputs are disconnected.
 

·
Registered
Joined
·
5,941 Posts
There was a bit of drama with that car. I remember it originally had a SRT turbo kit but then the car went to PFS for their stage 3 setup and V160 swap. Looks good though!
 

·
Registered
Joined
·
272 Posts
Discussion Starter #59
There was a bit of drama with that car. I remember it originally had a SRT turbo kit but then the car went to PFS for their stage 3 setup and V160 swap. Looks good though!
Oh, so the original build was not by PFS? This thing has had what, five - six known owners in its 44K miles,about 8K of which have been mine. Like I have said, there was evidence of many different hands on it...some not too skillful.
 

·
Registered
Joined
·
1,584 Posts
Kind of a silly question.
But where is your breather line running to from your valve cover? It looks like it runs right behind the air filter on the turbo intake. Am I correct on this.

Sweet build man.
 
41 - 60 of 175 Posts
Top