spool time????? - DSM Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum: DSMtalk.com
 
HomeForumGalleryClassifiedsAbout UsAdvertiseContact Us

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   DSM Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum: DSMtalk.com > DSM Tech Central > General DSM Tech and Tuning

DSMTalk.com is the premier Mitsubishi Eclipse Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
Old 09-12-2000, 09:44 PM   #1
akiem
New DSMtalker
 
Join Date: Aug 2000
Posts: 17
akiem's Gallery
Feedback Score: 0 reviews
Question

What rpm should I expect at 16g to spool up at? My 14b didnt "kick in" (spool) until 3500rpms. I didnt like that. Would like to get spool up rpm to at least 3000rpms or lower.
akiem is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-12-2000, 10:06 PM   #2
greenstreak
Honorary Administrator
I don't have a life DSMtalker
 
greenstreak's Avatar
 
1996 Talon Tsi AWD
Join Date: Aug 2000
Location: Dublin, Pa,
Posts: 17,448
greenstreak's Gallery
Feedback Score: 19 reviews
Wink

My small 16g spools to 16 psi by about 3100 in second gear starting at 2000 rpms. I think it is about average.
greenstreak is offline   Reply With Quote
Old 09-12-2000, 10:11 PM   #3
Pauleyman
DSMtalker
 
Join Date: Aug 2000
Location: Oklahoma City, Oklahoma
Posts: 123
Pauleyman's Gallery
Feedback Score: 0 reviews
Question

spoolup is determined by alot of other factors. Most notable is exhaust and portwork. Other things can have effects too. Cams, even fuel control. What ELSE did you have with that 14b? Alot of people also dont' realize that wastegates tend to slip their bushings after time and get off center on old internal gate turbos. It's easily remidied by pushing the bushing back in but it requires turbo removal to do it. A new turbo obviously wouldn't have this feature yet...YET.
Pauleyman is offline   Reply With Quote
Old 09-13-2000, 07:51 AM   #4
greenstreak
Honorary Administrator
I don't have a life DSMtalker
 
greenstreak's Avatar
 
1996 Talon Tsi AWD
Join Date: Aug 2000
Location: Dublin, Pa,
Posts: 17,448
greenstreak's Gallery
Feedback Score: 19 reviews
Question

Pauleyman, how do cams effect spoolup? I have heard from TTMKIV guys that cams usually increase spoolup by about 500 rpms on their cars but I would have thought that cams would help spool time by increasing flow through the head.
greenstreak is offline   Reply With Quote
Old 09-13-2000, 03:40 PM   #5
akiem
New DSMtalker
 
Join Date: Aug 2000
Posts: 17
akiem's Gallery
Feedback Score: 0 reviews
Question

Thanks for the info I just got my 16g today but cant install it I found 3 cracks in the exhaust manifold. Anyone know where I can get a 2gen manifold?
akiem is offline   Reply With Quote
Old 09-13-2000, 04:29 PM   #6
cpeed
Super DSMtalker
 
Join Date: Sep 2000
Location: Salt Lake City, Utah
Posts: 353
cpeed's Gallery
Feedback Score: 0 reviews
Question

yeah, check out dsmtrader.com and thepartstrader.com - There was one more that someone mentioned, but I didnt like the site.
cpeed is offline   Reply With Quote
Old 09-14-2000, 01:50 PM   #7
ecoli
Ultra DSMtalker
 
99 GSX
Join Date: Aug 2000
Location: Minneapolis, MN
Posts: 1,091
ecoli's Gallery
Feedback Score: 0 reviews
Question

You normally lose power in the lower rpms with cams, which is when your turbo would be starting spool. There is probably less exhaust gas to spool the turbo, so it takes longer...
ecoli is offline   Reply With Quote
Old 09-14-2000, 11:04 PM   #8
ecoli
Ultra DSMtalker
 
99 GSX
Join Date: Aug 2000
Location: Minneapolis, MN
Posts: 1,091
ecoli's Gallery
Feedback Score: 0 reviews
Question

I don't actually know... My car just feels slow on the low end since I installed cams. The cams might allow more air and exhaust by, but the car isn't making as much HP on the low end as it did before. So, I would just guess that there would be less exhaust overall and might actually take a little longer for the RPMs to get going. My turbo is a bit big and slow spooling to start with though anyways...
ecoli is offline   Reply With Quote
Old 09-15-2000, 08:21 AM   #9
Talonted
New DSMtalker
 
Join Date: Aug 2000
Location: Grand Ledge, MI
Posts: 88
Talonted's Gallery
Feedback Score: 0 reviews
Question

Not true, Ecoli. At least not always. It depends on what the cams are designed for. Most cams are designed for high RPM horsepower and therefore sacrifice a little on the low revs. It doesn't have to be this way. My GUESS is that the TT Supra guys greenstreak was talking about got some cams with longer duration on the exhaust side. Longer duration=exhaust valves open longer=more exhaust gases per engine stroke=faster spool for your turbo. Right? If I am in error (which is entirely too possible) someone feel free to tell me I'm a big dummy! :p

[This message has been edited by Talonted (edited September 15, 2000).]
Talonted is offline   Reply With Quote
Old 09-15-2000, 10:14 AM   #10
ATKChemist
DSMtalker
 
1992 Laser Turbo AWD
Join Date: Aug 2000
Location: Christiansburg, VA
Posts: 231
ATKChemist's Gallery
Feedback Score: 0 reviews
Lightbulb

On the cams issue:
If you were to get an exhaust cam to keep the exhaust valves open longer, you would end up using the intake charge to help remove all the exhaust gases. (both sets of valves would be open at one point). If you were to mash the go pedal and start boosting, your pressurized intake charge would push any extra of the exhaust out in addition to a small amount of that intake charge leaving the cylinder. Hense, spooling the turbo quicker. Wouldn't this significantly decrease spool up time or the time to reach full boost pressure? Just a thought. Someone set me straight if I've messed up here.

Zach
'92 Laser RS Turbo AWD
"RSX"
ATKChemist is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 02:10 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
© AutoGuide