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Old 05-19-2002, 12:17 AM   #1
nativo
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Default '98 Rs-t

A few questions:

1. How many '98 RS-T are out there?

2. How many have blown their head gasket?

3. Out of those which are first Gen 2.5 and whish 2nd Gen 2.5?

4. How much boost were you running when it blew?

5.How you fix it? (i.e new gasket, O-Ringed, more torque, etc.etc)?

Thanks,
Efrain
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Old 05-23-2002, 05:35 AM   #2
minix42@
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Default

I have a NA '98RS with dirty coolant if that counts... 0 lbs boost, Phase 1 block, and I'm crossing my fingers that the subie fairy came last nite and fixed it for me. If that doesn't work, I'm stealing my little sisters car so I'm not stranded while I begin disecting. Not much help, but at least it's a BUMP!
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Old 05-23-2002, 12:02 PM   #3
yebokmj
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Default MY98

I had an MY98 running 6psi of boost for 20,000 miles give or take a few hundred. It was a Phase 1. I'm not sure exactly what happened with my car it ran perfect up to and including the day I removed the kit. I put the car completely back to stock and I kept on over heating I couldn't even drive it like more than a mile from the garage. So I got it towed to the dealership and it got a brand new short bolck and heads. I sold the car so that's the end of that story.
Joshua
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Old 05-23-2002, 06:56 PM   #4
SteveS
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1. How many '98 RS-T are out there?
Not many considering the fact that there weren't that many MY98 RS's made or sold.

2. How many have blown their head gasket?
I have, as have countless other DOHC 2.5L engine owners.

3. Out of those which are first Gen 2.5 and whish 2nd Gen 2.5?
I would suspect that most MY98 owners ended up with a Phase I block. I have a late build MY98 with a Phase 2 block, though. Didn't seem to make a difference.

4. How much boost were you running when it blew?
I ran anywhere from 5 PSI up to 8 PSI for approximately 19K miles.

5. How you fix it? (i.e new gasket, O-Ringed, more torque, etc.etc)?
Stock gaskets with o-ringed heads. I've put about 20K miles on the car since then without any problems. (Knock on wood. )

Steve
http://www.forcefed4.com
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Old 05-27-2002, 07:41 AM   #5
nativo
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Question Which Turbo kit???

For those of you '98RS, specifically DOHC, which turbo kit do you have? Did you have to modified it or was it a direct bolt-on???

Thanks,

Efrain
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Old 05-27-2002, 12:57 PM   #6
ej25turbo
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I have a late 98 with phase 2 block. blew the gaskets after 10K with only 5PSI. took it to Rallispec to have them replaced. Stock gaskets. 20K since then with it pushing 8PSI. (Also knocking on wood)
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Old 05-27-2002, 02:06 PM   #7
nativo
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Question '98 with Ludespeed kit??????

Are there any '98 RS with a Ludespeed Turbo Kit????????????
Thanks,

Efrain
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Old 05-28-2002, 09:43 AM   #8
HRE | giulio
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Default Re: Which Turbo kit???

Quote:
Originally posted by nativo
For those of you '98RS, specifically DOHC...
Was there a different kind?

1) Don't know.

2) I haven't.

3) I forgot which mine is. I think it's II though.

4) Currently 5psi. For about 20k miles now.

5) Hopefully I'll never find out!

g
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Old 06-01-2002, 05:24 PM   #9
CUNNINGHAM
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I have a 98 with no kit yet and I blew my head gaskets after 85k. I am ordering a ludespeed kit in the next week or two. stage II.
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Old 06-01-2002, 07:42 PM   #10
N/A
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So what companies are out there making metal headgaskets for the EJ25? Anybody got an idea of the price range?
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Old 06-11-2002, 06:31 AM   #11
nativo
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Default '98 RS-t idle

Again this is only for the '98 RS-t:
How have you delt with the fact that when there is a sudden drop in RPM the car is having trouble assuming idle. Otherwise the idle is fine.
Thanks,

Efrain
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Old 06-11-2002, 05:48 PM   #12
TR
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Default yes, i have that problem too

with the car idling OK, but often dropping past idle and stalling if you are not quick to blip the throttle. I have gotten used to catching it with a slip blip of the throttle, then easing it down into idle.

yes, I also have a 98 RS-T (used to be supercharged and it had the same problem then too, although with Super I assumed it was the drag caused by the super that caused that).
I used to run with a bell FPR, and it was not that - now have larger (370) injectors. didnt matter if there was an AFC, SFC or nothing in there, or the uprated fuel pump.

as for metal headgaskets, dont bother. I had them attempted, and everytime they leaked. I think its something with the way they are sealed. regular headgaskets and machining the heads to match the gaskets perfectly has been the way to go for me.

i also cracked the cylinder wall under turbo boost - 6lbs -SFC, Supra fuel pump, J&S, Bell FPR. That got replaced with a Legacy Turbo shortblock assembly. now running 8.5 lbs, Supra fuel pump, 370 injectors, J&S, S-AFC
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Old 06-11-2002, 06:32 PM   #13
ej25turbo
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Default Idle drop

From my experience, I've found that if the blow off valve is not adjusted tight enough,It will not shut completely when the car comes back to idle. the Mass air sensor doesn't understand the missing air released by the BOV and can't compensate for it, thus stalling the car! Tighten the adjustment, but don't over do it or the BOV won't open then causing compressor surge. not good!
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Old 06-21-2002, 11:47 PM   #14
nativo
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Default '98 RS-t idle

Anyone else???

Efrain
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Old 06-22-2002, 12:27 AM   #15
STiTuner
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I have a 01 RS but I own most of the Very first turbo kit for the RS made by Ludespeed it was built for wards car but he never got it to work right.. something about the fueling problem and stalling out during shifts. I have all fo the pipes and IC well everything but the GT25 ball bearing turbo that was used that blew seals.

Brad
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Old 06-22-2002, 04:00 PM   #16
Leonardo
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Default

Mucho Boost, eh???

Call Chui, he might be able to help you as he's the one doing all the "Fine Tunning" on the RS'Ts. If not, ask Elliot!

All head gaskets from the 98- RS are the same so it's no diference!

Remember your car has logged lots of hours in PCA, BMWCA, and Auto-X events. Just new gaskets, and OEM torque should help!

Leo
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Old 06-22-2002, 11:31 PM   #17
nativo
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Default '98 RS-t idle

Muchas Gracias Leo:
What I am talking about is something very unique of '98 RS. A sudden drop in rpm (not necessarily from boost) will make the car die. It has something to do with a valve just bellow the throtle body. Besides that everything else is fine.

Gracias,

Efrain
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Old 06-23-2002, 03:07 PM   #18
TR
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Default Same

Nativo, that is exactly the same problem I have, it does not seem boost dependent.
not sure what else it could be, although I am looking into the S-AFC Decl settings. anyone have experience with that?
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Old 06-23-2002, 06:51 PM   #19
yebokmj
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Default Idle Air Control Valve

The problem your talking about it that of the Idle Air control valve. It doesn't respond quickly enought with a turbo system. If you go with a lightened flywheel you will have even more trouble. I had an HKS S-AFR in my MY98 and it was able to program it not to stall but it would come very close when coming out of anything over 3 grand.
Joshua
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Old 06-24-2002, 09:15 AM   #20
giulio
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yes yes i have that problem too!!!
i have to massage the throttle at a stop, wait for rpms to settle, for it to not stall.
aw i feel so much better now. i thought it was just MY car!
g
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Old 06-24-2002, 05:54 PM   #21
TR
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Talking throttle massagers anonymous...

this is starting to sound like a support group for throttle massagers. has anyone cured this issue without a complete ECU replacement? to me thats overkill for this problem.
any ideas?
decl function on SAFC? doing something to the idle control valve?
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Old 06-24-2002, 06:34 PM   #22
nativo
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Default '98 RS-t idle

Ok! so I suppose my 10Lbs Flywheel is not making matters any better. So far when I know I have to stop I just press on the brakes without touching the clutch which I press at the very last moment and it does not stall.
Basically as I see it, it could be fixed if someone were to mess with voltage of that Idle Air control valve. Any volunteers...I suppose there aren't as many of us to find a cure. But you all can impress me
Later,

Efrain
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Old 07-07-2002, 02:44 PM   #23
rotary
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Default

so would a copper or metal or sti head gasket fix the problem?

And cracked cylinder walls are from detonation right?
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Old 07-07-2002, 06:45 PM   #24
Mancini
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Default

I'd be interested to know if a new ECU would fix the idle problem. I just got my 98 RS a couple months ago and am planning on putting a turbo kit on it this winter. I was possibly planning on replacing the ECU with a Link...anyone have experience with this problem and a Link. Thanks.
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Old 07-10-2002, 12:02 AM   #25
racerwad
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Default

mancini-

a new ECU such as the link2 should fix the problem because most often the idle problem is caused by transient richness due to BOV's not being vented back into the intake tract. aftermarket ECU's replace the stock MAF with a MAP sensor that needs no special off boost, off throttle compensation. you cc can also run a super loud bling-bling BOV that vents to the atmosphere as well.

efrain-

have you confirmed that your BOV is venting back into the intake tract after the MAF? that should be the problem. good luck.

andy
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