i am plannin on having my car upgraged with the list of mods below sometime this week at rre. just wanted a few opinions from the guys on the board.

k&n drop in filter, manual boost controller, espelir down pipe (2.75 inches), rally spec resonator, rre stealth 3 inch exhaust, cel, walbro 255 fuel pump, denso 660cc injectors, 52mm boost and egt gauges and last but not least a reflash from scott grey. what kind of output should i be expecting with these mods on an evo ix on 91 pump gas with a more conservative tune?

the 2.75" dp was kind of bothering me but the guys at rre were reassuring me that it would be better this way since theyve had experience with the 3inch+ heating up the transfer case too quickly??? is the 1/4 inch really that big of a deal? and are the power gains that vast with just a 1/4 inch more that i should be worrying about? any thoughts and opinions appreciated

EDIT: how long will the stock clutch last with the power ill be putting out? never really launch the car... but i do suppose i drive harder then most.

 

I believe many of your projected mods have been shown to not be needed until you are pushing much greater HP / TQ and would highly recommend against all of them with the exception of the TBE, boost gauge, and flash.

Larger injectors -- Not needed and will cause more challenges with the tune
K & N drop in -- Not needed, but OK (dont' over oil)

DP -- I have a 3" TTP DP and have it wrapped and doubt there is an issue, otherwise more road racers would chime in (either way you'll be happy)

Walbro FP -- NO WAY....First off there are many 9's pumping way more HP with stock pump....Secondly the pump whines.....Third the pump will likely need to be replaced every year from what I have read....I went with the larger fuel pump b/c it was recommended by Al....Now the general consensus is that it is not needed on the 9's until you are doing much more (e.g. larger turbo)....

Hope this helps.....Oh yeah, what about suspension work??? Those guys do some nice setups....

 

IMO, do a 3" turboback exhaust and the MBC right off the bat. Also, do the inexpensive, 15 h.p., Ebay O2 housing at the same time. No injectors or pump upgrade needed at your proposed mod level, in any way, shape or form. The two gauges are a must, along with an oil pressure gauge. Then install these mods yourself. You really don't need to spend on the K&N as the stock paper element flows well enough to support those mods. You might wanna also throw on a lower intercooler pipe upgrade to improve turbo spoolup. Lastly get ECUFlash and cable and have either Scott Grey or Alfred at Tuning Technologies, in Colton dynotune it for you.

The clutch should last awhile, although you might wanna remove the restrictor orifice in the the clutch line for added longevity and improved clutch engagement. There are a ton of IX's doing low 12's with these basic mods( Eleven's with Alky). Good Luck!

EDIT: Just a thought....RRE distributes the Zeitronix which is a highly accurate data retrieval and display device. You may wannna look into it as an alternative to purchasing separate EGT, Boost and AFR gauges. It is extremely accurate.

 

2.75 downpipe is fine that what i ran for 2 years i had a nice strong pull with that downpipe when i used a 3in for about 2 days i felt the spool hit in about 200 rpm later i have no clue why but when i put the old one back in it was fine.

 

I have been running almost 3 years with the same Walbro. Bad information here.

Every shop has a different way to be safe. Did you guys forget he has the crappy 91 out there? The injectors and pump are cheap insurance. And tuning them is not much of a hassle for any good tuner.

As far as the DP heating up the t-case I would say that one needs some proof. I would honestly think your t-case would fail due to other issues long before the heat from your exhaust would kill it. If anything the diameter is the only small part although on a stock turbo car the 2.75" should help keep low range spool and drievability similar to stock.

I would expect that 300whp would be no problem. If not more. But I don't have a IX.

 

I have run the espelier 2.75" dp for over a year and a half with no problems. It fits great and the car has no problem making 320whp+ on a mustang dyno.

 

Scot Grey recommends the FP anyway...according to him, its cheap insurance.

 

With his level of basic mods and given the conservative 91 octane tune he wants, the stock injectors and pump should still have plenty of headroom. The factory IX pump is an improved unit and flows more than the stock VIII pump does. The injectors seem way premature and a needless expense.

I could see forking out close to $400+ if he was gonna be running the stock injectors near static, but not with his level of mods. He did say a conservative 91 octane tune. The injectors and pump are good as is.

In So Cal they got used to running the 720cc injectors when wanting more ignition advance with an SAFC II. But, it wasn't really necessary strictly based on fuel delivery needs. Seems like overkill or mere tuner preference to me.

 

Well, if they are suggesting the injectors then he's probably going to run an SAFC with the reflash. It's become the cool thing to do out here.

Terry S

 

If anything, larger injectors are not a good idea with SAFC as either you will run too much ignition advance up top for 91 or run too rich as to not run too much ignition advance.

 

Injectors with an SAFC is standard protocol according to the SAFC fanboys and tuners...

Terry S

 

Yup, doesn't mean its the best option.

 

True. Just pointing out the logic behind the suggestion.

Terry S

 

This Dr. Grey has forgotten more about tuning Evos with an SAFC and larger injectors than I might ever know if I went to Tuner School for fifteen years. So, on second thought if he suggests the 660's there is a reason.

The 660's are probably preferable to the 720's for a pump gas tune as they tend to be a bit less detonation prone than the larger injectors when used in conjunction with the SAFC.

Dr. Grey knows what he does and does it better than anyone else. If I lived in SoCal, and wanted my Evo tuned with an SAFC, 720's, and 272's I would go to Dr. Grey. The O.P. should end up with a rippin IX.

 

No, that's only without a reflash. There's no need for injectors when using an SAFC on top of a flash. The reason why you need injectors with the SAFC by itself is because we run lean in stock form at peak boost but with weak timing. To indirectly advance timing in the low and mid-range with the SAFC, you have to remove fuel, but you can't do that since it's already lean at peak boost. If you add fuel, which is sometimes needed, then the resulting effect is that the ECU lowers timing, and that is no good.

So, you install bigger injectors which introduces a lot more fuel across the board, so you then are able to REMOVE fuel in the low end and mid-range, which gives timing advance everywhere. The downside is you have no direct control over timing and just have to take what it gives you. The more fuel you remove due to injectors, the more the timing gets advanced, and that is NOT a good thing, especially on 91oct.

This guy is getting a flash, therefore he has _0_ need for injectors. Especially for such basic stg1 mods, the injectors are a big waste of money. He could get a set of cams for almost that much...

I do recommend the fuel pump and disagree with CJ in regards to that one aspect.