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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 11-16-2008, 08:31 PM   #1
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sr20det tuning? more pwer?

Got myself a 91 siliva that has a stock sr20det with turbo timer-looking to get a more power without losing my wallet. i hear the t25 can produce good power if tuned properly . stock at 7psi isnt enought for me(im not a racer).
just like to hit the throddle on open clean roads. id go for a t28 bigger injectors etc but i dont have enough to spend. als id like to get a fmic . Does anyone know where to get a good tune and how much it would cost, also wat other things could i do to get more power without breaking the wallet?
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Old 11-16-2008, 09:00 PM   #2
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Money is an inevitable factor in any upgrading..

http://www.P D M-racing.com (no spaces)
http://www.racinggreed.com
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Old 11-16-2008, 09:23 PM   #3
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Quote:
Originally Posted by jing View Post
Money is an inevitable factor in any upgrading..

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very true and well said.
im just looking for a simple way to gain power-not looking to gain anything huge but a decent tune if i could
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Old 11-16-2008, 09:58 PM   #4
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boost controller should help.

boost it to like 10-12 psi.

safc should help too
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Old 11-16-2008, 10:08 PM   #5
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Quote:
Originally Posted by cakeTech View Post
boost controller should help.

boost it to like 10-12 psi.

safc should help too
That sounds liek it would. thanks
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Old 11-16-2008, 10:51 PM   #6
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Turbo Elbow, Downpipe, exhaust first if you don't have it already
Megan Exhaust manifold too if you want. You can get it for cheapo used.

Stock T25 can go upto 14. Anymore, and you'll be out of the efficiency range for the T25.
FMIC is a must if you do more than 12 PSI, cause after that it gets pretty hot.

Apexi Intake kit. It comes with an extended elbow that connects to the maf, so it acts kinda like a CAI. Go Apexi because the filter design actually makes power VS the Greddy or HKS.

Boost Controller. Go Electronic, don't bother with MBC. If someone says otherwise, they're cheap assholes who can't afford one. Plus, an EBC will let you tune the boost for RPM, Gear, and Throttle position. So you can essentially make boost turn on to your settings.

AFC. Cheap, works fine. You should look into standalone ECU tuning when you want actual power though.. but that won't be until you go with a GT28 AT LEAST.

Don't bother with injectors until you get a bigger turbo.
Don't bother with the Intake mani until you get a bigger turbo

Cams make great power depending on the duration and tune you have. 246's or 252's all around will make good power. 264's and up won't be needed until you go solid lifters and again, bigger turbo.

BUT
If you just want 200 to the wheels..
Boost up to 14
FMIC
Exhaust/Downpipe/Elbow
Filter.

That should actually make 210-ish. minimum.
Some make 220, some make 200.

You don't actually need the AFC if you go with that. The stock injectors can handle 14PSI on the T25. Get it if you want to be safe. I'm sure you can squeeze a bit more out of it with the AFC though.

edit:
You should probably look into a new 255lph pump too while you're at it.
It's $100, and chances are, it's gonna go and you won't be able to turn on your car. Or worse, it fails while boosting. Ouch.
Don't worry, it won't affect your mileage. It just flows more. Unless your regulator is toast, which is unlikely.

I also hope you're using 94.
I know a guy who used 91 and boosted to 20 PSI on an SR, and wondered why his car was slow.

Last edited by SpuGen; 11-16-2008 at 10:56 PM.
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Old 11-16-2008, 11:05 PM   #7
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Quote:
Originally Posted by SpuGen View Post
Turbo Elbow, Downpipe, exhaust first if you don't have it already
Megan Exhaust manifold too if you want. You can get it for cheapo used.

Stock T25 can go upto 14. Anymore, and you'll be out of the efficiency range for the T25.
FMIC is a must if you do more than 12 PSI, cause after that it gets pretty hot.

Apexi Intake kit. It comes with an extended elbow that connects to the maf, so it acts kinda like a CAI. Go Apexi because the filter design actually makes power VS the Greddy or HKS.

Boost Controller. Go Electronic, don't bother with MBC. If someone says otherwise, they're cheap assholes who can't afford one. Plus, an EBC will let you tune the boost for RPM, Gear, and Throttle position. So you can essentially make boost turn on to your settings.

AFC. Cheap, works fine. You should look into standalone ECU tuning when you want actual power though.. but that won't be until you go with a GT28 AT LEAST.

Don't bother with injectors until you get a bigger turbo.
Don't bother with the Intake mani until you get a bigger turbo

Cams make great power depending on the duration and tune you have. 246's or 252's all around will make good power. 264's and up won't be needed until you go solid lifters and again, bigger turbo.

BUT
If you just want 200 to the wheels..
Boost up to 14
FMIC
Exhaust/Downpipe/Elbow
Filter.

That should actually make 210-ish. minimum.
Some make 220, some make 200.

You don't actually need the AFC if you go with that. The stock injectors can handle 14PSI on the T25. Get it if you want to be safe. I'm sure you can squeeze a bit more out of it with the AFC though.

edit:
You should probably look into a new 255lph pump too while you're at it.
It's $100, and chances are, it's gonna go and you won't be able to turn on your car. Or worse, it fails while boosting. Ouch.
Don't worry, it won't affect your mileage. It just flows more. Unless your regulator is toast, which is unlikely.

I also hope you're using 94.
I know a guy who used 91 and boosted to 20 PSI on an SR, and wondered why his car was slow.
this is Great info here. Thanks a buch and it has the elbo downpip and exaust.
as for the manifold ive heard megan crack ?/ not sure but ive heard of it happenin but strengthen the welds should ge good. but yes i will look into everythig you just said and i think ive found a solid upgrade now. thansk for the help and ill post up anything that i do
thanks again
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Old 11-17-2008, 04:58 AM   #8
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Just cut the flange between the runners. It relieves the stress.

Some people have them crack, others don't. Depends how hard you run the car imo.
Just don't wrap it. Coat it with Ceramic paint instead, cause the wrap makes lesser quality exhaust parts crack. Ceramic lets it breathe, wrap doesn't.

If you have any more questions, feel free to PM me.
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Old 11-17-2008, 05:39 PM   #9
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An intercooler doesn't cool the turbo, nor extend its life. You might want to read up some more on turbo basics before modifying anything...
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Old 11-18-2008, 12:10 AM   #10
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When did anyone say an Intercooler extends turbo life/Cools the turbo?
You might wanna read before posting nonsense.

FMIC = cools down compressed air after turbo pre tb = more power
Colder air = More dense = more power

Even Honda guys know that.
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Old 11-18-2008, 12:19 AM   #11
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Quote:
Originally Posted by SpuGen View Post
When did anyone say an Intercooler extends turbo life/Cools the turbo?
You might wanna read before posting nonsense.

FMIC = cools down compressed air after turbo pre tb = more power
Colder air = More dense = more power

Even Honda guys know that.
that would be me ahh sry. im still a noob in the turbo scene..still learning tho
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Old 11-18-2008, 11:31 AM   #12
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Meh I've used MBCs with absolutely no problems. Less things that can possibly fail. I've used EBCs in the past some are good some bad. But if you are trying to keep it on a budget ($300 vs. $40) then MBC is the way to go. Like you said you aren't doing any racing or anything crazy.

I'm a little more biased as I don't like snaking stuff from the back of the mr2 into the cabin haha.

Last edited by Expresso; 11-18-2008 at 11:31 AM.
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Old 11-18-2008, 04:32 PM   #13
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Quote:
Originally Posted by SpuGen View Post
When did anyone say an Intercooler extends turbo life/Cools the turbo?
You might wanna read before posting nonsense.

FMIC = cools down compressed air after turbo pre tb = more power
Colder air = More dense = more power

Even Honda guys know that.
Dumbass, read OP's comment below yours. Looks like you need to do more reading there professor...

Last edited by luke; 11-18-2008 at 04:34 PM.
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Old 11-18-2008, 10:08 PM   #14
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Dumbass, read OP's comment below yours. Looks like you need to do more reading there professor...
calm down guys. im trying to get sum advice here haha...chill
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Old 11-18-2008, 10:56 PM   #15
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also does anyone know what happen to vancouver240?/ trying to find it butno luck
i got nwn and 240 forums but all in state...
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Old 11-19-2008, 07:56 PM   #16
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search up project zig v240

the entrance page or w/e is down expired but site is still up
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Old 11-19-2008, 09:20 PM   #17
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search up project zig v240

the entrance page or w/e is down expired but site is still up
alright
thanks man this shouldhelp
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Old 11-19-2008, 09:24 PM   #18
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new update* got myself a used hks intake it-installed todai
next up is boost controller still choosing from ebc or mbc- most likley mbc since of my budjet-afc
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Old 11-20-2008, 01:23 PM   #19
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if ur looking for power on the cheap,
1. megan elbow,
2. downpipe,
3. test pipe
4. any exhaust.
5. ebay front mount intercooler kit
6. walbro pump
7. electronic boost controller i would recommend the greddy profec b spec II

You can probably do all that under 1250$ if you shop around, buy some used stuff, and install yourself.

I would then look at a nistune daughterboard and some tuning. With the CAD dollar so much stronger than the AUD, you can get a fully programmable ecu for like 500$. It's not a lot more than an afc, and it can do so much more.
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Old 12-02-2008, 03:23 PM   #20
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My buddy has a 92 GTi-R with the SR in it. Does anyone know where we can get a FMIC for that car?
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Old 12-02-2008, 06:52 PM   #21
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Originally Posted by SpuGen View Post
Stock T25 can go upto 14. Anymore, and you'll be out of the efficiency range for the T25.
Actually efficiency range is about 10-12. 12 is REALLY pushing it. I don't think the T25 can go past 14. I've disconnected the wastegate vaccuum line and it didn't move beyond 14psi.

Quote:
Originally Posted by SpuGen View Post
Apexi Intake kit. It comes with an extended elbow that connects to the maf, so it acts kinda like a CAI. Go Apexi because the filter design actually makes power VS the Greddy or HKS.
They all make power compared to the stock paper filter in the airbox.

Quote:
Originally Posted by SpuGen View Post
Cams make great power depending on the duration and tune you have. 246's or 252's all around will make good power. 264's and up won't be needed until you go solid lifters and again, bigger turbo.
246 is about stock. There are no commercially available 252's to my knowledge.

Cam upgrades help regardless, especially with increases of airflow through the engine(boost increase, turbo upgrade, etc.) I have run HKS 264 step 2's on a stockish turbo and it helped spool slightly and made a marked improvement at the top end. Solid lifters aren't necessary until you go high rpm (8000+) and huge lift.

Quote:
Originally Posted by SpuGen View Post
You should probably look into a new 255lph pump too while you're at it.
It's $100, and chances are, it's gonna go and you won't be able to turn on your car. Or worse, it fails while boosting. Ouch.
Don't worry, it won't affect your mileage. It just flows more. Unless your regulator is toast, which is unlikely.
This is definitely recommended for USDM 240's, but he has a JDM Silvia and I can presume that this is a K's.(Not a swapped Q's) They are fine for his output.

Quote:
Originally Posted by -luong. View Post
ive heard megan crack ?/ not sure but ive heard of it happenin but strengthen the welds should ge good. but yes i will look into everythig you just said and i think ive found a solid upgrade now. thansk for the help and ill post up anything that i do
thanks again
I've sold around 50+ of those Megan SR20 manifolds and have yet to see one fail. If you compare against OBX, or similar ebay manifolds, the flanges and piping is thicker. Even with a GT3071R turbo hanging off of it, I have yet to see one crack.

The Megan turbo outlet on the other hand....

Actually with those ones the ones I see fail is when they are coupled with downpipes without the flex, and with worn engine mounts.
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Old 12-02-2008, 07:19 PM   #22
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If you don't want to break the bank, i'll give you a setup that has worked for the beginner enthusiast.

-GReddy LS or similar front mount
-3" exhaust (downpipe, test pipe, cat-back) if you can install yourself, add a manifold and outlet as well
-ROM tune
-boost controller (manual is fine, electronic is ideal, but not necessary)

This is proven for 200+whp on a Mustang dyno.

Next step, turbo, injectors, maf...

Last edited by hung_lo; 12-02-2008 at 07:20 PM.
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Old 12-03-2008, 12:03 AM   #23
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Alright. So I have done a few things to the sivlia so far. And yes, it is the K series.
So far I've got a hks intake- downpipe- elbow-catback..Also got a cheapo fmic kit coming. I have search around and heard the same about the t25 being scketchy at high boost for this little thing.

Most likely for buget savings im goin with the manual boost controller-any idea where i can get one around the 604- i dont want ebay-although i will if i have to.
One thing i heard about mbc is the spiking. most likely the t25 wont be albe to handle
the 14 as said by hong lo.i wouldnt want the mbc to spike it up and cause major damage.(if it could).

where could i get a rom tune?
im not sure if ill go for a afc as I heard it helps. if anything
ill go to the bigger turbo injectors and the 300zxmaf- but that wont be for
a long time from now. As for now ill wait on the fmic and then go for a boost controller
and a megan manifold if i find one-Maybe ebay-

Does anything know what a silvia ks rear end is stock? open or lsd?
This one came from japan pretty done for drifiting- as it has complete suspetion already done and all struts (very firm) Im not sure whats inthe rear and maybe thers a way to find out but iduno.
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Old 12-06-2008, 09:47 PM   #24
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^vlsd, if you want to upgrade turbo, i suggest you with the s15 t28bb. t25 is only good up till 14psi, and thats the maximum. Just keep in mind, anything after that you are looking at spending a lot of money... stock interno is good till 300whp... you can achieve that with MAYBE t25 and good tune, and the bolt ons that you have running 14 psi...
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Old 12-11-2008, 01:03 AM   #25
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just got the fmic it bov and a boost controller
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