Spool question

Arro · Post by **Arro** » Fri Dec 14, 2007 8:41 pm

For those who are turbocharged...

What PSI are you running at, and at what RPM do you reach max boost? And what turbo and exhaustg specs are you running with?

I'm interested in hearing from both SRT and non-SRT turbo'd 2GN's.

Kevin_GP · Post by **Kevin_GP** » Fri Dec 14, 2007 9:04 pm

Srt-4 turbo I was running 8-9 psi and it was pretty instant, I never stabbed the throttle right off idle (no reason for that, no traction down there anyway) and I was at full boost by 2,500-3,000 rpm. Defiantly no lag there.

Wenuden · Post by **Wenuden** » Sat Dec 15, 2007 12:52 am

I spike 14 and drop to about 11 at redline. It hits max boost a short-hair of a second after I floor it. I'm usually paying attention to holding the steering wheel straight than what rpm I spool at. Stock srt turbo and 3" exhaust = unnoticable lag. With 3" o2 housing, should be almost nonexistent.

BlackRoseRacing · Post by **BlackRoseRacing** » Sat Dec 15, 2007 6:13 am

Non-2GN...
My Daytona spiked to 25psi at about 2800rpm on the low boost setting...talk about no traction

(ps it was a Garret T-04)

MoxHair · Post by **MoxHair** » Sat Dec 15, 2007 9:52 am

TD05HR-15GK2-10cm2 w/TiAl Wheel

23psi at 2900-3000rpms

turbodudey · Post by **turbodudey** » Sat Dec 15, 2007 11:45 am

SRT turboed 2.0L. Stock 2.25" exhaust w/o muffler

14 psi by 2500 rpm with 50% throttle.

Anything above 3k rpm I get full boost at about 35% throttle. I hardly ever go WOT... no need for that kind of craziness.

Arro · Post by **Arro** » Sat Dec 15, 2007 8:06 pm

MoxHair wrote:TD05HR-15GK2-10cm2 w/TiAl Wheel

23psi at 2900-3000rpms

Mox what's your exhaust specs?

MoxHair · Post by **MoxHair** » Sat Dec 15, 2007 8:46 pm

Arro wrote:
MoxHair wrote:TD05HR-15GK2-10cm2 w/TiAl Wheel

23psi at 2900-3000rpms
Mox what's your exhaust specs?

Mopar Stage 3R o2 housing, Exhaust Depot 3" Downpipe, Exhaust Depot 3" Mid pipe w/ 24" Resonator, Country Club 3" Single Exit Rear Section

Now.. is that what you were looking for, or the exhaust specs on the turbo.

Over the Stock Turbo:

-16% larger compressor wheel diameter

-19% larger turbine wheel diameter

-67% more turbine scroll area

dysphagia · Post by **dysphagia** » Sun Dec 16, 2007 12:16 pm

you cant forget altitude that makes a huge difference in spool up time. my turbo spools up at 3800-3900rpm at 5800ft and about 3100rpm at sea level. this is on a AGP3147

Arro · Post by **Arro** » Sun Dec 16, 2007 1:07 pm

Mox yeah I wanted exhaust, but the turbine specs are interesting to know, too.

I'm most concerned with:

- Max PSI set at...
- Full boost reached at.... (RPM)
- Turbo specs
- Exhaust specs
- Only on an SRT-4 engine.

authirish · Post by **authirish** » Sun Dec 16, 2007 9:15 pm

2.0 with Srt ported and clipped stock turbo, 2.5 inch exhaust. Full spool by 1500 @ 18lbs.. but usless.. no traction...lol Usually don't go WOT until 2000-2500rpm. no lag at all

Arro · Post by **Arro** » Sun Dec 16, 2007 9:22 pm

Nice setup, but I'm just doing research on SRT-4 engines, not 2.0L. In terms of spool comparisons it's like apples and oranges.

I want to hear from the SRT owners on here.

oklamopar · Post by **oklamopar** » Mon Dec 17, 2007 12:11 pm

18 PSI @ 3k .stock turbo, AGP wastegte
stock exhaust w/gutted cat.
no lag

Arro · Post by **Arro** » Mon Dec 17, 2007 2:09 pm

I want more info than "no lag". It doesn't come on at 1K. What RPM does your 18psi hit at?

Post by **racer12306** » Mon Dec 17, 2007 2:11 pm

oklamopar wrote:18 PSI @ 3k

Arro · Post by **Arro** » Mon Dec 17, 2007 2:16 pm

Grrr this is what happens when you ewakr up hung over hahaha i'm not even gonna mess with the computer I'm going back to bed.

srt4evah · Post by **srt4evah** » Mon Dec 17, 2007 2:34 pm

Wastegate is set to 25psi, hits full boost around 3000RPM.

Stage 3 turbo, TD05HR.

3" O2, 3" downpipe with a 3" Quicktime electric cutout, behind that is the stock SRT-4 exhaust, but when I want to go fast I just open the dump.

eVilcreations · Post by **eVilcreations** » Mon Dec 17, 2007 3:12 pm

I'm only on 11 psi right now with the DBB 50 trim, it hits that full 11 psi at right around 2200......

3" exhaust from turbo to tips, no cat, no resonators, nothin but flow.

After I get home(less than 30 days, but I'm not counting or anything), I'll go get her tuned finally, and roll on the 24-28psi range with the DBB 50 trim....I'll update when I get those #'s

Josh

oklamopar · Post by **oklamopar** » Mon Dec 17, 2007 5:22 pm

racer12306 wrote:
oklamopar wrote:18 PSI @ 3k

starts coming on @ 1500 RPM. SRT-4's = small turbo.

Going to start auto cross so going back to stock vacuum lines and wastgate ease for of acceleration

Arro · Post by **Arro** » Mon Dec 17, 2007 5:40 pm

Yeah I just looked it up, it's a tiny sucker. So moving to a bigger turbo means more than 1500 rpm. Looks like 15 psi on a bigger turbo will be ~2500, and 25 will be ~3000. Of course that's a vague statement but you get the idea.

This is what I wanted to know, thanks to all of you

Wenuden · Post by **Wenuden** » Mon Dec 17, 2007 6:06 pm

that's all dependant on whether the head/exhaust manifold/turbine housings are ported or stock, as well.

Arro · Post by **Arro** » Mon Dec 17, 2007 6:13 pm

True; then I ask, who here that posted in this thread has a ported head? Again this is strictly SRT-4 engines.

Wenuden · Post by **Wenuden** » Mon Dec 17, 2007 6:40 pm

In my research, I've noticed more people port there exhaust manifold rather than the head. From what I've read that I ch recall, a good port job on the manny with stock turbo is good for a couple hundred or so rpm difference on spool time. These questions would probably net you better responses on srtforums.

Arro · Post by **Arro** » Mon Dec 17, 2007 7:34 pm

I was going there second. 2GN.org always gets my questions before srtforums or the other org. Can you blame me? lol

srtforums isn't really that bad, but I still get a straight answer here quicker and easier than anywhere else.

MoxHair · Post by **MoxHair** » Mon Dec 17, 2007 11:40 pm

Nothing Ported, and the Mopar Stage 3R WGA.

My car has a very basic setup

TheNumberOneD · Post by **TheNumberOneD** » Tue Dec 18, 2007 8:59 pm

Arro wrote:Mox yeah I wanted exhaust, but the turbine specs are interesting to know, too.

I'm most concerned with:

- Max PSI set at...
- Full boost reached at.... (RPM)
- Turbo specs
- Exhaust specs
- Only on an SRT-4 engine.

Max PSI - 18
Holds -~15 in second ~16or17 in 3rd 4th and 5th
Full boost reached at - 3000RPM (not to mention PTB)
Stock SRT Turbo
3" Downpipe thats dumped

will set boost higher once i get my fuel mods and tuner set up!

looking for 22spike 18 hold, with a 11.5 AFR still on stock turbo.
Roughly 290whp and 310wtq, and then a second MAP for a 75shot of nitrous to make it into the 11's