Topic: Turbochargers

[sharpxmen]

we moved the rpm rev limiter form 6000 to 5600 and we left the foot before revving... there was no more power upthere.

it still won't explain why you're making more power with 2psi less boost. I would get a second opinion if i were you.

[alexr40]

it still won't explain why you're making more power with 2psi less boost. I would get a second opinion if i were you.

at the top end ... because i had less exhaust restriction with the .63
with more exhaust restriction I boost faster, more power in midrange, but loose top end.
with 2 extra psi with a small housing, the top end stays the same.

I have read in different forums of people loosing topend HP by using smaller a/r .. they compensate with more boost.. exact same situation.

anyways. I am using same dyno, same climate, same everything.  I am not really into numbers, but performance. the jeep feels great and runs great. a whole new vehicle.

[sharpxmen]

at the top end ... because i had less exhaust restriction with the .63
with more exhaust restriction I boost faster, more power in midrange, but loose top end.
with 2 extra psi with a small housing, the top end stays the same.

I have read in different forums of people loosing topend HP by using smaller a/r .. they compensate with more boost.. exact same situation.

anyways. I am using same dyno, same climate, same everything.  I am not really into numbers, but performance. the jeep feels great and runs great. a whole new vehicle.

i'm not talking about top end, look at the 55mph vertical line, you get more boost (something like 1.5psi but it's hard to tell) on the red line and the power is actually slightly lower

[kj_8_bb]

does anyone know how to get the E-Book that guy was selling on ebay?

[sharpxmen]

does anyone know how to get the E-Book that guy was selling on ebay?

what e-book?

[Jeffy]

what e-book?

He's talking about that PDF that guy was selling on ebay.

[kj_8_bb]

yes does anyone still have it. i just got a 95 yj 2.5 and i am afraid it wont have enough power for the sand dunes.

[sharpxmen]

yes does anyone still have it. i just got a 95 yj 2.5 and i am afraid it wont have enough power for the sand dunes.

there's plenty of info on "out there" but to be honest i have no idea what that e-book contained, i doubt it will answer all your questions. Check St.Chevrolet's build in member's projects and you'll get a lot of info

on the other hand you might want to look at an engine swap for the same amount of money probably (unless your 2.5 is fresh and pristine).

[Jeffy]

there's plenty of info on "out there" but to be honest i have no idea what that e-book contained, i doubt it will answer all your questions. Check St.Chevrolet's build in member's projects and you'll get a lot of info

on the other hand you might want to look at an engine swap for the same amount of money probably (unless your 2.5 is fresh and pristine).

It wasn't worth whatever anyone paid.  It's not very specific, IIRC.

[jfrabat]

It wasn't worth whatever anyone paid.  It's not very specific, IIRC.

No, it was NOT specific AT ALL.  I think I still have that somewhere, but it is missing A LOT of information...

[sharpxmen]

No, it was NOT specific AT ALL.  I think I still have that somewhere, but it is missing A LOT of information...

do you have it in PDF? (or can you scan it if not?)

[whyjay94]

do you have it in PDF? (or can you scan it if not?)

New member, starting turbo project on 94 YJ 2.5 with A/C. I have turbo mounted and will be hooking up oil and coolant lines this week. I have a question on oil lines. I have read both Sean and Robs threads. Can I buy a oil cooler sandwich for a oil cooler and run my oil lines through that instead of from my oil sending unit and return to oil pan? Just seems easier , but don't know if there is a reason no one does that.

[sharpxmen]

New member, starting turbo project on 94 YJ 2.5 with A/C. I have turbo mounted and will be hooking up oil and coolant lines this week. I have a question on oil lines. I have read both Sean and Robs threads. Can I buy a oil cooler sandwich for a oil cooler and run my oil lines through that instead of from my oil sending unit and return to oil pan? Just seems easier , but don't know if there is a reason no one does that.

first off you want it after the filter (with the sandwich adapter would be before it passes thry it)

secondly you want it split from the main galley, there is a drop of pressure thru the filter, if you go your route you'd be losing more pressure by splitting before the filter (and would drop pressure more the older the filter, you'd be getting more oil pressure at the turbo as a result).

that's what i can think of

i would just do it at the sender like everyone else

[whyjay94]

first off you want it after the filter (with the sandwich adapter would be before it passes thry it)

secondly you want it split from the main galley, there is a drop of pressure thru the filter, if you go your route you'd be losing more pressure by splitting before the filter (and would drop pressure more the older the filter, you'd be getting more oil pressure at the turbo as a result).

that's what i can think of

i would just do it at the sender like everyone else

Thanks for reply, sharpxmen. I saw on some other turbo threads where too much oil can flood the bearings and cause seal failure. I guess too much is not a good thing here.

[dwtaylorpdx]

+2 on be carefull about too much oil, I fix them at the race track and over oiling is one of the most common issues.

Turbo City or one of hte others should be able to tell you the size restricter that goes in the supply side , also use the biggest return line you can to the engine, the oil foams coming out of the turbo and a too small or restricted return will plug with foam and over oil the unit as well.

I use 1" return lines on the race cars....

Dave