2006 IS250 LS1 Swap - Page 22 - Club Lexus Forums


2006 IS250 LS1 Swap

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Old 11-22-13, 04:40 AM   #316
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So here are the dyno results. They are not as high as I would have liked but I doubt they ever are. The good news is that if you take the standard 15% powertrain loss than I am right at 401 at the crank which sounds a lot better than 341.

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Old 11-22-13, 05:43 AM   #317
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awesome bro... skies the limit...
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Old 11-22-13, 07:05 AM   #318
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You just removed the ceiling. It's tough trying to build this car with the 2GR. Im over here looking at some wild options just to get to 400whp. After i do the piggy (and maybe headers if PPE will contact me) I'll be looking at adding extra injectors to dump fuel, nitrous, etc. The rest of your road is easy! Congrats!
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Old 12-04-13, 02:27 PM   #319
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Congratulations on all of your success!!
Just curious if you've done anything more with the stock intank fuel pump and components?

Today, I installed the ISF mechanism into my is350 (prepping for a 2urgse swap). It's no surprise that the ISF fuel pump is MUCH larger than the stock is350. I didn't remove them from the housings but the F is much thicker in diameter. Almost like comparing a stock FP to a nice fat walbro.

Thought you might be interested since this could be an easy upgrade for you.
The white housing (on right) is IS-F:



FP front and center, see how large in diameter:




Quote:
Originally Posted by Thumper28 View Post
First, I wanted to track down the fuel lines. I am planning on using a bypass style fuel pressure regulator so I need a supply and a return line. I don't have any specs on the IS250 stock fuel pump but I am going to give it a shot unless I discover that it's not adequate. The pictures below show the fuel line locations at the fuel tank as well as the engine bay. There was an extra line in the engine bay that I tracked down to a unit underneath the trunk. After a little research I found it that it's a fuel vapor canister. Something for emissions. At this point I don't know what I am going to do with it so I'll have to do some more research.


Fuel Tank Connections


Engine Bay Connections


Fuel Vapor Canister (To get an idea of the location, you can see the exhaust where it splits to go to each muffler in the background)
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Old 12-04-13, 06:10 PM   #320
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^I'd like to know the liters per hour rating on either pumps to see what's up. Unfortunately I don't have access to such details.
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Old 12-04-13, 06:25 PM   #321
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Good info. So is it a direct replacement?

I looked everywhere for pump info before my swap and had no luck. I figured give it a shot and if the flow rate was insufficient I would deal with it then. I currently don't have any problems now but I know I'll have some power adders in the future and this will be good to know.

Where did you get it and how much did it cost if you don't mind me asking?
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Old 12-04-13, 06:35 PM   #322
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Quote:
Originally Posted by Thumper28 View Post
Good info. So is it a direct replacement?

I looked everywhere for pump info before my swap and had no luck. I figured give it a shot and if the flow rate was insufficient I would deal with it then. I currently don't have any problems now but I know I'll have some power adders in the future and this will be good to know.

Where did you get it and how much did it cost if you don't mind me asking?
EDIT* here you go! The first one lists the part number which is correct-
2008 Fuel Pump / Injector Pump
Lexus IS F FUEL PUMP ON FUEL TANK 77020-53141 $300 TLS Auto Recycling USA-CA(Rancho-Cordova) 877-247-1717

2008 Fuel Pump / Injector Pump
Lexus IS F ASSM,TANK A 11630B $250 Diamond Auto Parts USA-WI 1-888-236-7731


Theres sooo much I would like to know about the fuel system on these cars outside of what I can or cant comprehend thru white papers!

I believe you may run into problems over 375whp or so...at least we started seeing injector duty cycles climb in the 90% but it could just be the injection system and not the pump? I would venture to guess the pump will be a limiting factor though hence why the ISF is so much larger.

I found the intank setup from a salvage yard in CA...It was only a couple hundred; cheaper than buying a pump alone which would then have to be fitted into your ISx50 housing.

The housing drops right into the fuel tank. Though the tanks are different the orientation looks to be the same. The passenger side sending unit is identical so that makes me feel better as well.


Last edited by mikellucci; 12-04-13 at 06:49 PM.
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Old 12-18-13, 08:51 AM   #323
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I posted a thread with some info on the is350 fuel pump.

Question: where did you hook the stock motor to pull it? I only see open holes on the sides/ends of the head.
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Old 12-19-13, 10:47 AM   #324
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Quote:
Originally Posted by mikellucci View Post
I posted a thread with some info on the is350 fuel pump.

Question: where did you hook the stock motor to pull it? I only see open holes on the sides/ends of the head.
Good question. I would love to know the recommended lift points but I searched for a while online and couldn't find anything. I did not use the open holes, they looked a little weak. I ended up grinding down some of the brackets on my lifting shackle and using 4 of the valve cover bolts. that span the intake manifold. I can't remember off the top of my head if they are visible without removing the intake manifold but my initial thought is no.
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Old 12-19-13, 11:01 AM   #325
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Quote:
Originally Posted by Thumper28 View Post
Good question. I would love to know the recommended lift points but I searched for a while online and couldn't find anything. I did not use the open holes, they looked a little weak. I ended up grinding down some of the brackets on my lifting shackle and using 4 of the valve cover bolts. that span the intake manifold. I can't remember off the top of my head if they are visible without removing the intake manifold but my initial thought is no.
Damn. I don't know what to use....I removed the intake manifold in search of something to attach the picker to! lol Never have I been unsure wth to pull a motor with; theres nothing on this thing. LOL

My subscription to TIS is out but from what I recall Toyota always drops the subframe

Last edited by mikellucci; 12-19-13 at 11:14 AM.
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Old 12-19-13, 11:59 AM   #326
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I just went thru all 22 pages lol, this is awesome....i actually live in palm beach never seen this car before.
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Old 12-19-13, 12:57 PM   #327
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Lexus didn't want you EVER to remove these motors out of the chassis! LOL!
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Old 02-12-14, 06:41 PM   #328
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Props, how much did this run you anyways, how many hours in do you think?
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Old 06-03-14, 10:36 PM   #329
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Any updates, i love this car
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Old 06-09-14, 10:01 AM   #330
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Any new updates or videos?
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