T-28 Supporting Mods

[Dasamary]

Now Ive read alot on swapping out the T-25 with a T-28 and what mods you'll need to run good boost. Call me crazy but if I plan on running 16-17 PSI of Boost through a T-28 I will only need a higher flow fuel pump.

Is any one actually running this type of set-up and looked at the air/fuel curve? I want to baby my engine but increase the HP a little bit. (I know the clutch will start to go at around 250hp) If I do swap in a bigger Fuel pump will I need a better Fuel Pressure Regulator as well?

I'd love to here from anyone running this set up!

Thanks

 

[diablos991]

The 190 will give you everything you need to max out theat turbo.

If I were you, I would heavily consider going with 550cc or evo 560cc injectors and having some way to control them.

I personally am going with a big T-28 setup. I have a 190 and I plan on getting evo 560cc with a keydriver chip installed to control them.

 

[kenamond]

Now Ive read alot on swapping out the T-25 with a T-28 and what mods you'll need to run good boost. Call me crazy but if I plan on running 16-17 PSI of Boost through a T-28 I will only need a higher flow fuel pump.

Is any one actually running this type of set-up and looked at the air/fuel curve? I want to baby my engine but increase the HP a little bit. (I know the clutch will start to go at around 250hp) If I do swap in a bigger Fuel pump will I need a better Fuel Pressure Regulator as well?

I'd love to here from anyone running this set up!

Thanks

To run 15psi on my FP B28, I'm not quite starved for fuel yet, so I suspect that rewiring the stock FP will get you enough fuel on the top end at 16psi, maybe 17psi. It's a cheap, simple upgrade which everyone says makes a big difference in top end fuel pressure (I'll be doing it this week).

I also have new filter, Dejon solid IC piping, solid intake, 1g BOV, and a Joe P IL MBC. Check my profile. I'd recommend freeing up the intake with these mods, especially the UICP, as the stock one has a huge restriction where it passes by the stock filter box and fuse box. You definitely need the 1g BOV or some other upgrade to the 2g BOV.

I also ported my ex. mani., turbine and O2 housings before installing the new turbo, since everything was apart on my workbench.

Do all of the Stage 0 upgrades first, though. You could see some noticeable gains just by getting your car up to par.

P/M me if you want any specifics, or I can post them in this thread, too.

 

[hottboost]

I was able to run 16-17psi on the SBR BigT28(same as the FP) with a good timing curve with no knock. I only upgraded the stock fuel pump and all other supporting mods and port work except for fuel. I will tell you that if can afford to go ahead and do the 550cc injectors and some way to control them. Then you should be able to run 19-21psi and that is where it really comes alive! At that point you will be where I am at and needing a FMIC! The stock smic heat soaks after 2-3 hard pulls. Good luck and let me know if I can help!

 

[Ultimatedsm]

At 15 psi, your stock fuel injectors are pretty much maxed out. I highly recommend at least 550's with some kind of air/fuel controller. An upgraded intercooler doesn't hurt either considering the stock one heat soaks pretty easily when the temps outside are a little high.

 

[Dasamary]

To run 15psi on my FP B28, I'm not quite starved for fuel yet, so I suspect that rewiring the stock FP will get you enough fuel on the top end at 16psi, maybe 17psi. It's a cheap, simple upgrade which everyone says makes a big difference in top end fuel pressure (I'll be doing it this week).

I also have new filter, Dejon solid IC piping, solid intake, 1g BOV, and a Joe P IL MBC. Check my profile. I'd recommend freeing up the intake with these mods, especially the UICP, as the stock one has a huge restriction where it passes by the stock filter box and fuse box. You definitely need the 1g BOV or some other upgrade to the 2g BOV.

I also ported my ex. mani., turbine and O2 housings before installing the new turbo, since everything was apart on my workbench.

Do all of the Stage 0 upgrades first, though. You could see some noticeable gains just by getting your car up to par.

P/M me if you want any specifics, or I can post them in this thread, too.

I actually run a Injen Intake with a K&N Filter, then Have a 3" Cat-back exhaust, I have a Buschur Racing UICP with a 1G BOV.

Unfortunatly since this car is my daily driver I don't have much time to put into the work myself. I actually have planned on running an EVO III O2 housing along with a 3" DP and Test pipe to free stuff up.

I know the T-28 flows more air than the T-25 when both are at 15 psi. Whats the actual power increase like? If I am looking at 5-10 HP I'll probably hold off on this until I build my engine a little.

Thanks for all the help so far. I'll pass around some Rep points!

 

[2gGSX]

The highest T25 airflow that I've seen is 24 lbs/min. At 15 psi on my old big 28 I recorded 28 lbs/min limited by my stock fuel pump. This equates to roughly 40 hp to the crank.

As far as staying at 15 psi on this turbo the stock injectors can handle it, although they will be at the very brink of your IDCs (roughly equal to mid 90% on 450's using my IDCs from my 660's). The fuel pump is what limited me. 28 lbs/min at 15 psi is actually past the stock 2g fuel pump's capabilities--415 cc/min at 15 psi under ideal situations (shamless plug: you can get these numbers from my tech article http://www.dsmtuners.com/forums/showthread.php?t=232171). The rewired 2g stock fuel pump will deliver more than enough fuel for the stock injectors (546 cc/min per injector at 15 psi, in fact they will deliver over 450 cc/min per injector at up to 23 psi boost assuming 43 psi base fuel pressure).

Thus, to be honest the only fuel mods you need to run 15 psi would be a fuel pump rewire and preferably some way to avoid fuel cut as well as log your data in the likely situation your setup does not follow ideal values (which it won't).

 

[nismo4life]

Amber at FP recommended S-AFC, 550's, upgraded FP (might as well get a 255 since the 190 and 255 are the same price), and a mbc. Thats only if you plan on running over 14lbs. If not then just swap the turbo and you don't need to do anything else.

 

[skinnykenny84]

Amber at FP recommended S-AFC, 550's, upgraded FP (might as well get a 255 since the 190 and 255 are the same price), and a mbc. Thats only if you plan on running over 14lbs. If not then just swap the turbo and you don't need to do anything else.

Remember, if you get the 255 fuel pump your gonna need a fuel pressure regulator. That pump is more than the stock fpr can handle.

 

[nismo4life]

Remember, if you get the 255 fuel pump your gonna need a fuel pressure regulator. That pump is more than the stock fpr can handle.

mmm good point. My friend has a 255 lph and he ran the stock fpr for 2 or 3 months but was having alot of issues.

 

[Ultimatedsm]

255LPH and an AFPR will cost you around $300-350 USD. If your on a budget and want around 300-350WHP than 190 will do, it will cost you around $100-120 USD which is a lot less. Just rewire the 190LPH so you will get a TRUE 190LPH not like 160LPH. You will be good to go at that point. You can get 550's from FIC for little as $200.00 USD. An SAFC you can get from $150-350 USD depending on which model you get. So if you go pure budget, it will cost you:

550's : $200.00
190LPH pump: $100.00
SAFC: $150.00

Total: $450.00 USD

Your good to go for 350WHP at that point. Not bad.

If you go the 255LPH route and plan to make more power than that it will cost you a lot more money in fuel.

550's won't be enough at that point and you will have to get 650's

650's: $270.00 (From FIC)
walbro 255: $100.00
AFPR: $200.00 (For the kit from FIC)
SAFC: $150.00
Total: $720 USD

That setup should be good for 400-450 WHP fuel wise at least.

It is up to you which route, however to make 400WHP, you will have to change a lot of other stuff like Intercooler, Clutch and the cost of broken parts .

 

[kenamond]

I actually run a Injen Intake with a K&N Filter, then Have a 3" Cat-back exhaust, I have a Buschur Racing UICP with a 1G BOV.

Unfortunatly since this car is my daily driver I don't have much time to put into the work myself. I actually have planned on running an EVO III O2 housing along with a 3" DP and Test pipe to free stuff up.

I know the T-28 flows more air than the T-25 when both are at 15 psi. Whats the actual power increase like? If I am looking at 5-10 HP I'll probably hold off on this until I build my engine a little.

Thanks for all the help so far. I'll pass around some Rep points!

My T25 died when all I had was an upgraded clutch, so I never upped the T25 boost to 15psi, but I know that the B28 at 15 with stock exhaust is very noticeably more powerful. I'm not sure at what PR the B28 compressor is on its island, but I'm guessing it's at around 20psi, so you're not really getting what you can out of it at 15psi. However, you need fuel mods and a tuning tool to get that far.