Suggested IS300 mods? - Lexus IS Forum
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post #1 of 13 (permalink) Old 07-10-2019, 04:55 PM Thread Starter
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Suggested IS300 mods?

I just bought a 2002 SportCross. I love the car as it is, but I'm always looking for improvements to my cars. I was wondering if anyone knew of any must-do mods (whether aesthetic or performance mods).

For example, I spent about $30 changing the interior lights on my Corvette to LEDs, and I think it was the best money I've ever spent on the car. $200 to change the sealed beams to LED headlights is a close second. If anyone bought a C4, I would recommend them to do those two mods right off the bat, no questions asked.

I'm thinking I'll ultimately turbo the car, so I'd like to avoid any expensive engine mods until I make that decision, but I would like to try to give the car a bit more pep. (It's fast enough for what it is, but I'm coming from a Corvette. What can I say?) I'd also like to keep the car smog-legal for now.

I've been doing some reading here, and a lot of people recommend replacing the intake pipe and adding a CAI. Looks like that would be about $300, though, and I'd end up replacing it again if went to turbo.

What do you guys suggest?
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post #2 of 13 (permalink) Old 07-11-2019, 11:03 AM
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Quote:
Originally Posted by DailyDrivin' View Post
I just bought a 2002 SportCross. I love the car as it is, but I'm always looking for improvements to my cars. I was wondering if anyone knew of any must-do mods (whether aesthetic or performance mods).

For example, I spent about $30 changing the interior lights on my Corvette to LEDs, and I think it was the best money I've ever spent on the car. $200 to change the sealed beams to LED headlights is a close second. If anyone bought a C4, I would recommend them to do those two mods right off the bat, no questions asked.

I'm thinking I'll ultimately turbo the car, so I'd like to avoid any expensive engine mods until I make that decision, but I would like to try to give the car a bit more pep. (It's fast enough for what it is, but I'm coming from a Corvette. What can I say?) I'd also like to keep the car smog-legal for now.

I've been doing some reading here, and a lot of people recommend replacing the intake pipe and adding a CAI. Looks like that would be about $300, though, and I'd end up replacing it again if went to turbo.

What do you guys suggest?
If you are thinking of turbo. Just do it. Low boost (6psi) on stock internals. Is fine. should be around 300 to 350 whp. There are lots of write ups on the forum.

Careful & Consistent
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post #3 of 13 (permalink) Old 07-11-2019, 02:28 PM
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If it is a manual then the FIGS Clutch Damper Delete is a good one.
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post #4 of 13 (permalink) Old 07-11-2019, 02:34 PM
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I wouldn't bother with the intake if you want to turbo. You can also try the "throttle cable spacer mod" at the throttle pedal to help get more pep easier/faster
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post #5 of 13 (permalink) Old 07-11-2019, 06:05 PM Thread Starter
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Originally Posted by 01 SolarYellow View Post
If you are thinking of turbo. Just do it. Low boost (6psi) on stock internals. Is fine. should be around 300 to 350 whp. There are lots of write ups on the forum.
That's my plan, good to know I won't have issues.

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If it is a manual then the FIGS Clutch Damper Delete is a good one.
Thanks, but sadly the SportCross only came in auto.

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Originally Posted by TobiasSing View Post
I wouldn't bother with the intake if you want to turbo. You can also try the "throttle cable spacer mod" at the throttle pedal to help get more pep easier/faster
I came across that, but so far the throttle response hasn't bothered me.
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post #6 of 13 (permalink) Old 07-12-2019, 05:42 PM
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Just got my IS300 too and looking to turbo it for just a bit more power. Turbo kits are not that expensive nowadays. So you guys suggest not to go over 6psi right? The stock AT tranny should be able to handle it?

After 13 years, I finally got my IS300... and an ISF in the same week. Lexus Fam!
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post #7 of 13 (permalink) Old 07-12-2019, 10:09 PM
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Yes.....

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1-8-7 on the undercova i-s-3-hundgy
IS3TT
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post #8 of 13 (permalink) Old 07-15-2019, 02:02 PM Thread Starter
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What's expected with 6psi? 300hp at the crank, so ~225 at the wheels?
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post #9 of 13 (permalink) Old 07-15-2019, 02:37 PM
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What size turbo?

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1-8-7 on the undercova i-s-3-hundgy
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post #10 of 13 (permalink) Old 07-15-2019, 08:05 PM
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Quote:
Originally Posted by DailyDrivin' View Post
What's expected with 6psi? 300hp at the crank, so ~225 at the wheels?
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Originally Posted by FRaCTioNaL View Post
What size turbo?
About a 62mm to 65mm will get you 300 to 350 whp.

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post #11 of 13 (permalink) Old Yesterday, 11:23 AM
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Quote:
Originally Posted by DailyDrivin' View Post
What's expected with 6psi? 300hp at the crank, so ~225 at the wheels?
My first turbo IS made 310 whp on 5.7 psi of boost. Ended up blowing the ringlands on cylinder 6 though. Was on a PTE 6262. Stock intake is the best. You could replace the tube. but not worth the effort imo.

I think the best way to make a little extra power is to do a tune up and make sure its running as best as it can. Clogged cats slow you down a bit. you'll be surprised how much a new maf and o2 sensors COULD help your car drive. My wagon is much slower than my sedan and they are both 100% stock.
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post #12 of 13 (permalink) Old Yesterday, 01:02 PM Thread Starter
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Quote:
Originally Posted by jesuspuppy View Post
My first turbo IS made 310 whp on 5.7 psi of boost. Ended up blowing the ringlands on cylinder 6 though. Was on a PTE 6262. Stock intake is the best. You could replace the tube. but not worth the effort imo.

I think the best way to make a little extra power is to do a tune up and make sure its running as best as it can. Clogged cats slow you down a bit. you'll be surprised how much a new maf and o2 sensors COULD help your car drive. My wagon is much slower than my sedan and they are both 100% stock.
It seems fairly peppy right now. I'm planning to clean the MAF, and tonight I'll be hitting the drag strip so I'll be able to get an idea if it's running at 100%.
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post #13 of 13 (permalink) Old Today, 08:23 AM
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how'd you do DailyDrivin?
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