Are 550's enough?

[91BlackLaser]

I am getting my sons car tuned and ready for race season. The car has UICP, cams, 255lph fuel pump, 16psi (curently running 10psi), 2G MAF, full exhaust and an SAFC II. It currently has 510's and I am having to add a fair bit of fuel to get it to not knock. I am concerned that when I had 6 more pounds of boost that I may max the SAFC out. Will
550's be ok for this setup and a little further if we go for a 16g one day?

 

[Dream On]

I'd go with 650's.

 

[robs90tsi]

550's are perfect for the SAFC, you could go to something like 650's, but with 550's, you should have no problem tuning with 550's and a 16G, especially only at 16 psi.

 

[chicagoavenger]

Where is your AFPR at? Get that next will help in tuning

 

[Chaddycakes21]

I agree 550's will fit your 16g well. 16 psi wont be a problem with 550's. Also like stated before, you'll have a heck of a easier time getting a good tune with them oin your safc.

 

[92lzerNA]

Instead of starting a new thread i want to ask will my 550's max out around 20+psi on my s16g. I also plan on running a a vortec fmu if it not enough.

 

[Ultimatedsm]

550's can handle 20 psi of boost from a S16g, they only have a little problem keeping up with the EVOIII 16g turbo at that boost level which is bigger.

 

[92lzerNA]

550's can handle 20 psi of boost from a S16g, they only have a little problem keeping up with the EVOIII 16g turbo at that boost level which is bigger.

Thank you I tryed searching but all I could find was info about the evoIII 16g's.

 

[Big28 2gFWD]

lots of decent advice in this thread thusfar.....
1.with a 255lph pump the stock fpr will be overriden on most if not all cases, id recommend gettin an aftermarket to tone the pressure down a bit (aeromotive )
2. ## 550's will be sufficient for 16psi on a 16g, i have personally tuned a big16 to 20psi on 550cc's while staying below 90% duty cycle

and for my own $.02 keydiver stage 3 makes tuning on an s-afc mated to 550's a breeze...
best of luck to u in this season

 

[Big28 2gFWD]

i just re-read the original post and noticed that you are looking for advice on ## current set up which i am assuming would be a 14b? in which case all the same advice would apply...550's and a 255lhp ARE NOT overkill for the 14b, and will support a 16g either way u look at it ## in good shape, if i were you id look into spending the $ on dsmlink, and start start tuning for timing as well as boost(if u only want 16psi) on the 14b

 

[ChvyKc]

550's will be plenty of fuel for you. You shouldn't be able to max those injectors out on that turbo. I am running 24-25 pounds on a ported/clipped B16G and the AFC is still nowhere near being maxed out. I am just barely over zero on all the settings. I am still at stock fuel pressure as well so I have plenty of fuel left in the system. I don't plan on going with a bigger set of injectors until I upgrade the turbo.

 

[91BlackLaser]

Thanks for the info boys. What AFPR should we go with? I know some people say Aeromotive, but is that a bolt on kit or does it need some fabbing? I have seen kits advertised on this site that bolt to the existing rail with no other mods.

 

[andymoraitis]

Your profile isn't complete, so I can't see what kind of cams you have, but if you plan on running a 16G to it's full potential, I would recommend the 650's as I maxed out my 550's on Comp 200's. Anything over 24 psi will result in crazy IDC's and while the 255/AFPR combo will help supply more volume, you'll only eat up the smaller injectors that much sooner and burn them out. For an FPR, I'd choose an Aeromotive or an SX.

Good luck!

Andy

 

[91BlackLaser]

The cams are HKS 264's.

 

[dsm-onster]

550's can handle 20 psi of boost from a S16g, they only have a little problem keeping up with the EVOIII 16g turbo at that boost level which is bigger.

At 20 psi w/ stock cams, both turbos are at about the same efficiency. Same efficiency (same air temp) + same boost + same longblock (same losses from the intake mani and same volume) = same airflow.

The Ideal Gas Law => PV=nRT

If 550s are fine w/ a small 16G at 20psi then so are 550s fine w/ an EVO3 at 20psi.

550s are fine w/ a small 16G at 20psi. According to the DSM_Tuning_Sheet_v2.1.xls, 550s can flow enough fuel for around 310 hp at 37 psi base fuel pressure and 80% IDC. You should get an AFPR for you 255lph pump anyway. So raising the base fuel pressure to 43.5 lets the 550s flow enought fuel for around 340 hp at 80% IDC.

Will you be at 340 hp running 20 psi on a stock longblock? Probably not...

 

[dsm-onster]

The cams are HKS 264's.

W/ cams you should do ok. I was running at 72%IDC w/ my 660s at 20 psi w/ my 18g and much more aggresive FP2X cams...

You should still float around 80%-90% IDC... they're fine.


BUT!!!! You're done at that point. You can't raise the boost much higher. You can't mod any more on the long block. . . 650s are more advantagious to you. IF you plan on going farther.

 

[spectr019]

I didn't wanna start a whole new thread for this little question, but with 550's and the SAFC II and a 190 pump BUT with stock fuel regulator, what boost can I run my FP Big28 at? Thanks

Ben

 

[Ryan95tsiAWD]

I didn't wanna start a whole new thread for this little question, but with 550's and the SAFC II and a 190 pump BUT with stock fuel regulator, what boost can I run my FP Big28 at? Thanks

Ben

You really need some kind of logging software b/c what your car might run fine at may not for others and vice versa.

If you do have a logger...tune the car for no knock and you should be good.

With your setup 17-18psi "should" be good. I wouldn't try anymore without knowing how much knock/timing you are getting.

 

[dsm-onster]

I didn't wanna start a whole new thread for this little question, but with 550's and the SAFC II and a 190 pump BUT with stock fuel regulator, what boost can I run my FP Big28 at? Thanks

Ben

I agree w/ Ryan. Further, w/ all the upgrades you've listed in your profile, I didn't see an intercooler upgrade . Your stock intercooler will be heatsoaked by the end of one 1320 run if you run any boost remotely close to the potential of your upgraded turbo.

 

[dsmturbo111]

550's should work fine with your setup

 

[ChvyKc]

I agree w/ Ryan. Further, w/ all the upgrades you've listed in your profile, I didn't see an intercooler upgrade . Your stock intercooler will be heatsoaked by the end of one 1320 run if you run any boost remotely close to the potential of your upgraded turbo.

I agree with this as well. The 13.4 that I ran that is in my profile was on the stock smic at 19 pounds. You could tell that at the top of third and all of fourth that the car was pulling timing because the intercooler was heat soaked. I can tell a huge difference with the water injection and the supra smic.

 

[91BlackLaser]

Does the supra smic bolt up or what?

 

[dsm-onster]

Does the supra smic bolt up or what?

vFaq on a Supra MKIV Intercooler install for a 1G DSM

 

[ChvyKc]

Does the supra smic bolt up or what?

It's not a hard install at all. I used the above link as well but my lower intercooler pipe is slightly different. You will have to make a bracket to support it since it does not bolt up. You can get a piece of steel strap from Lowes for about 5 bucks that works great. It's a little hard to bend but will definately support the intercooler.

I used the part numbers off this thread to make the upper pipe.

http://www.dsmtuners.com/forums/showthread.php?t=153341

It was very easy once you have the parts that you need. The lower intercooler pipe is the one that is going to be hard to do. I ended up going in front of the cross member and up right beside the radiator. My overflow bottle is not there though so that may not be an option for you. Good luck if you do decide to do it.