simplify the is38 for me

arob157 · Dec 5, 2018

NomadEA888 said:
Hmm now the new Littco L38X I wonder how much that will make on pump. Seems to be the route I am looking at

Pretty sure add 10-20bhp from what I can remember. You can check the Littco Facebook page, or the "Another Littco L450 is headed across the pond" thread.

I think I am going to go with either an L430/L450 or EQT. Both have provided an extreme amount of information regarding their turbos performance, response, on which fuels, and tuning tips.

stockton2007 · Dec 5, 2018

arob157 said:
Pretty sure add 10-20bhp from what I can remember. You can check the Littco Facebook page, or the "Another Littco L450 is headed across the pond" thread.

I think I am going to go with either an L430/L450 or EQT. Both have provided an extreme amount of information regarding their turbos performance, response, on which fuels, and tuning tips.

If i could get 380 whp / 400wtq on a 93 pro tuned l38x, that's where i'm headed.

Otherwise, i'd like to see a l430 dyno.. not sure i've seen one yet.

NomadEA888 · Dec 5, 2018

That’s what I am shooting for a reliable high 300s. Don’t wanna go LX460 Bc I don’t wanna give up spool

Hoon · Dec 5, 2018

Diggs24 said:
98RON (claimed)

November
#4
#6
#8
#9

That will typically take 8-12 degrees of timing... probably 20-30hp more than US 93 octane.

Still, strong times.

NomadEA888 said:
but on standard 93 octane? you have to have every bolton possible to make that. Or am I wrong

No made 367 on 93.

Jay_Heim said:
Fbo is38 on pump makes what, 360whp on a custom tune? OTS is like 330? It has been so long since I looked...

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Most of the OTS are 345-355.

Pro-tune will be 350-380.

NomadEA888 said:
Hmm now the new Littco L38X I wonder how much that will make on pump. Seems to be the route I am looking at

Probably 10-15whp more than a standard IS38.

The real thing you're paying for is reliability. When Littco tried to run L450s on stock bearings (very early in the development) they couldn't get them above 25psi or so without failure.

They have customers running 38psi on their own design and so far they're holding up.

stockton2007 · Dec 5, 2018

Hoon said:
Probably 10-15whp more than a standard IS38.

The real thing you're paying for is reliability. When Littco tried to run L450s on stock bearings (very early in the development) they couldn't get them above 25psi or so without failure.

They have customers running 38psi on their own design and so far they're holding up.

so with a protune, a reliable 365-395whp, probably towards the higher side with good 93 octane.

feel like this may have made my decision for me.

Hoon · Dec 5, 2018

NJ_MK7 said:
so with a protune, a reliable 365-395whp, probably towards the higher side with good 93 octane.

feel like this may have made my decision for me.

Depends on the quality of the supporting mods, fuel, how hard you push the tune, and Dyno used.

My is38 made 367whp SAE corrected (I believe 374whp STD) on 93 octane with good fuel and an aggressive tune. There really wasn't much left on pump gas.

Same dyno and conditions, the L450 made 399whp SAE, but I deliberately chose some of the lower quality 93 octane around so I would not be limited to only a few stations. This tune is richer and running less timing. It's a zero knock tune instead of riding the knock sensors all the time...overall less aggressive than the IS38 tune was.

I think 375whp SAE is a good target for an IS38x. Can you get more? Sure. Is it a great idea on a pump gas daily driver? Opinions will vary. I like that I can put any 93 octane in the car and throw it a beating without a care in the world.

The last 10-20hp are a sacrifice to the gods of speed.

stockton2007 · Dec 5, 2018

Hoon said:
Depends on the quality of the supporting mods, fuel, how hard you push the tune, and Dyno used.

My is38 made 367whp SAE corrected (I believe 374whp STD) on 93 octane with good fuel and an aggressive tune. There really wasn't much left on pump gas.

Same dyno and conditions, the L450 made 399whp SAE, but I deliberately chose some of the lower quality 93 octane around so I would not be limited to only a few stations. This tune is richer and running less timing. It's a zero knock tune instead of riding the knock sensors all the time...overall less aggressive than the IS38 tune was.

I think 375whp SAE is a good target for an IS38x. Can you get more? Sure. Is it a great idea on a pump gas daily driver? Opinions will vary. I like that I can put any 93 octane in the car and throw it a beating without a care in the world.

The last 10-20hp are a sacrifice to the gods of speed.

Fair enough and excellent advice and detail as always. Jakes catted downpipe, majesty fmic, modified oem intake (May go open for sound), brisk plugs. No intentions of upgrading fuel. Have many choices for 93 in my area, one common location only goes to 92. How does one determine fuel quality? Logs?

Think 375hp / 400tq with quick spool is a great power level. + 60 hp and 90 tq over my mk6 ko4.

May also consider l430 if I could see a dyno to know if it’s worth the difference or not.

JeffGTI1 · Dec 6, 2018

When I'm ready if I decide to keep my GTI and not upgrade to an R I'm considering going to Turbonetics and having something custom made for my application has anyone explored that option? I mean if you're going to do turbo go all the way don't cheap out

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Hans · Dec 8, 2018

Should go like stink! There are a few vids around of similar builds; looks like it'll be a ton of fun.
https://www.youtube.com/watch?v=r2LnsLI6zEc

WhyNotZoidberg? · Dec 8, 2018

JeffGTI said:
When I'm ready if I decide to keep my GTI and not upgrade to an R I'm considering going to Turbonetics and having something custom made for my application has anyone explored that option? I mean if you're going to do turbo go all the way don't cheap out

Turbonetics custom, huh? Only one turbo, that's for peasants..

I mean if you're going to do turbo, go all the way, get a 911 GT2 RS, don't cheap out!

ChrisMk77 · Dec 11, 2018

Diggs24 said:
The Revo IS38ETR is expensive but also pretty solid. I'm looking at one 8.67s 60-130 on dragy with a Golf R DSG. I see 3 more at 8.85, 9.16, 9.52. That's not too shabby.

Istvan with a IS38ETR running 98ron that ran 8.67 in november posted a 100-200kmh 4th gear pull that is pretty impressive.

gregsju29 · Jan 18, 2019

I have a real question, because, let's be honest, if one person says something on this forum, it's gospel.... How many people have really blown is38's on the latest revision? Or are people just concerned based on previous versions? And was it on stock software, only tuned cars, and was it specific to certain tunes vs others? I'd honestly be shocked if all of these tuning companies, including APR who I consider a company that doesn't bend on pricing for quality, would continue to sell a solution that would lead to a "common" issue. With the latest revision, are the issues still persistent? Or was it just a couple guys who didn't know what they were doing and beat the crap out of their cars or tuned them on their own and didn't know what they were doing...and now it's wildfire on the forums.

railroader · Jan 18, 2019

gregprep29 said:
I have a real question, because, let's be honest, if one person says something on this forum, it's gospel.... How many people have really blown is38's on the latest revision? Or are people just concerned based on previous versions? And was it on stock software, only tuned cars, and was it specific to certain tunes vs others? I'd honestly be shocked if all of these tuning companies, including APR who I consider a company that doesn't bend on pricing for quality, would continue to sell a solution that would lead to a "common" issue. With the latest revision, are the issues still persistent? Or was it just a couple guys who didn't know what they were doing and beat the crap out of their cars or tuned them on their own and didn't know what they were doing...and now it's wildfire on the forums.

I blew a revT

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Twist1 · Jan 18, 2019

Latest rev is H. I'd say 80% chance you're going to be fine up at 415chp

Running stacks, custom tunes or pushing on E is gonna drop that percentage to probably around 60%.

You may get lucky. You may not. I've had both oem turbos pushed to the brim. My is38 still kicking and it's latest gen. Buy latest rev used

railroader · Jan 18, 2019

Twist said:
Latest rev is H. I'd say 80% chance you're going to be fine up at 400whp.

Running stacks, custom tunes or pushing on E is gonna drop that percentage to probably around 60%.

You may get lucky. You may not. I've had both oem turbos pushed to the brim. My is38 still kicking and it's latest gen. Buy latest rev used

Revt is after the H now there is an F you can find

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simplify the is38 for me

arob157

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