When should I tune?

[NismoDriver240]

I have searched only to find where can I tune?

I'm looking to know when I should tune. I'm going to be putting a redtop sr20 into my s13 to be (saturday woo!) and I was wondering if I had to tune for stock psi with the stock sr20 ECU. If I dont have to that'll be perfect but if I do I know of places around so I can do it.

Thanks for any and all help

[Hijacker]

If you're staying with the stock fuel management and stock boost, you don't have to tune anything. What do you think the community's been doing for the past however many years?

Now, in a perfect world, you would want to have a retune done for a boost increase, but it's not necessary. Real world practice, you only need to retune if you change anything that would change flow characteristics of the motor. Injectors, turbo, airflow meter, cams. You get the idea.

[NismoDriver240]

awesome! thanks for the help

[NismoDriver240]

second opinion or did he hit it right on the head? could i safely run 10 psi on stock everything with fmic or should i stay like at 8 or 9?

[CoupedUp]

You should only tune when you upgrade:

-Turbo-Engine Internals-Injectors-MA*S-ECU

You will be perfectly fine on 10 PSI and a FMIC.

Check for boost, vacuum and intake leaks after the FMIC setup and a month or so after to ensure that its solid.

[hmong503]

I have searched only to find where can I tune?

I'm looking to know when I should tune. I'm going to be putting a redtop sr20 into my s13 to be (saturday woo!) and I was wondering if I had to tune for stock psi with the stock sr20 ECU. If I dont have to that'll be perfect but if I do I know of places around so I can do it.

Thanks for any and all help

Sorry to jack you, i didnt want to start a new one but i just picked up a sr20det with t28 fmic at 10psi with stock ecu and stock grey injectors and other light mods and was wondering if i really needed a tune or better managment before i hit the track. The motor runs, idles good and just passed emissions. kinda new with the sr so any help would be great thanks.

[NismoDriver240]

i dont really care, your answers might help me too

after reading what they said above, you should double check with whoever you're getting the engine from to see if they tuned it for the t28 turbo since most sr's come with t25. i'm new to the whole sr world too but i believe im right, correct me if not. so since it's a bigger turbo you should tune for it...

right?

[CoupedUp]

Well, it is a bigger turbo, but seeing as how it is a "Stock" SR turbocharger, I would say he is fine at 10 PSI. Anything larger than the S15 Turbo and you should definitely look into tuning. That should be the only exception to the rule.

The other 4, if they change to something different, tuning is necessary.

[NismoDriver240]

gotcha dude

[240_SeX]

i dont really care, your answers might help me too

after reading what they said above, you should double check with whoever you're getting the engine from to see if they tuned it for the t28 turbo since most sr's come with t25. i'm new to the whole sr world too but i believe im right, correct me if not. so since it's a bigger turbo you should tune for it...

right?

All S13 sr's have t25 turbos. the S14 and 15 have t28s the S15 t28 is ball bearing

[jr_ss]

Well, it is a bigger turbo, but seeing as how it is a "Stock" SR turbocharger, I would say he is fine at 10 PSI. Anything larger than the S15 Turbo and you should definitely look into tuning. That should be the only exception to the rule.

The other 4, if they change to something different, tuning is necessary.

To add to what Couped Up said, You should get a tune if you change turbo's from engine to engine. An S13 ECU is tuned for a T25 where as the S14/S15's are tuned for the T28's, with the S15's being larger than the S14's. If you were to slap an S15 T28 onto an S13, I'd be looking to get a tune to take full advantage of the upgrade and for piece of mind. Not to mention that 10psi on the T28's is different than 10psi on a T25.

If you have basic BPU's (Bolt on performance upgrade's) then you don't necessarily need a tune. A tune to incorporate all of your upgrades would net you more power, but it's not needed.

Now going from a T25 to an S15 T28 on an S13, I would add bigger injectors, Z32 MAF and a tune.

[808customz]

i im planning to upgrade to a gt28r and fmic, so i guess a z32 maf and injectors are a must. now when "tune" is mentioned, can it be just an ecu tune or the dyno tune? i am going to be running 10 to 12 PSI max. i will have a wideband and some kind of a/f controller/management.....sorry for sort of thread jacking

[S14toRPS13]

My nephew's running a S15 turbo on his redtop at 14 psi with 370cc injectors and no tune. The car's actually running really good, although I'm sure he'll benefit from bigger injectors and a tune.

[jr_ss]

My nephew's running a S15 turbo on his redtop at 14 psi with 370cc injectors and no tune. The car's actually running really good, although I'm sure he'll benefit from bigger injectors and a tune.

Yeah, that's something I wouldn't leave to chance. I'm actually going to back my boost down to 10-11 instead of the 12-13 I run. I plan on getting everything together to get it tuned, here in the next couple of months. I could wipe out the savings to do it, but I'm in no rush.

Plans: S14 SR, Z32 MAF, 555cc's Tomei/Nismo, 70mm TB, FMIC, 3" turbo back, S14 T28 @ 1BAR... Hoping for 250-275ish rwhp. That would be nice.

[inkslingers13]

Yeah, that's something I wouldn't leave to chance. I'm actually going to back my boost down to 10-11 instead of the 12-13 I run. I plan on getting everything together to get it tuned, here in the next couple of months. I could wipe out the savings to do it, but I'm in no rush.

Plans: S14 SR, Z32 MAF, 555cc's Tomei/Nismo, 70mm TB, FMIC, 3" turbo back, S14 T28 @ 1BAR... Hoping for 250-275ish rwhp. That would be nice.

im sure you can pull those numbers off with that set up and a good tune

[CoupedUp]

Yeah, that's something I wouldn't leave to chance. I'm actually going to back my boost down to 10-11 instead of the 12-13 I run. I plan on getting everything together to get it tuned, here in the next couple of months. I could wipe out the savings to do it, but I'm in no rush.

Plans: S14 SR, Z32 MAF, 555cc's Tomei/Nismo, 70mm TB, FMIC, 3" turbo back, S14 T28 @ 1BAR... Hoping for 250-275ish rwhp. That would be nice.

My friend made 284WHP and 294 WTQ on S14 SR(S14 T28), S15 Injectors, Z32 MAF and SAFC NEO and Bolt ons(Stock Manifolds though).