DIY Turbo Discussion greddy on a 1.8? homebrew kit?
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Old 10-27-2018, 02:43 PM
  #341  
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Engine: 1.8 bp 99 Forged pistons, rods, arp all around.
Turbo: EFR6758 0.64a/r
Manifold: Trackspeed EFR T25
Downpipe Size/Style: Trackspeed EFR 3"
Exhaust Size: 3"
Exhaust Components: 3" catback, no cat
Intercooler Core Size: NRG medium size
Intake Manifold: VICS
Headwork: OEM
Engine Management: MS2pnp (waiting for ms3pro)
Other Spoolin' Helpers/Hurters: 6speed, 3.636 , audi r8 coils

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Boost(psi)
2329rpm 0.4psi
2414rpm 1.6psi
2495rpm 3.19psi
2618rpm 4.35psi
2713rpm 4.93psi
2835rpm 5.8psi
3005rpm 7.25psi
3147rpm 8.7psi
3280rpm 10.8psi
3380rpm 12.3psi
3491rpm 14.8psi
3601rpm 17.5psi
3748rpm 18.9psi
3856rpm 20.3psi


Past 5000 the pressure drops. I currently have an APEXi AVCR. Waiting for MS3 and a 4 port Boost solenoid. Will update when i will tune it properly. A completely diffrent car.( Previous turbo was a GTX 2867 gen1 0.64A/R)

Last edited by Mpliki; 10-28-2018 at 03:59 PM.
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Old 11-07-2018, 09:28 AM
  #342  
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Originally Posted by muoto View Post
Time to break spool records

Engine: '99 1.9L 9.5:1 84mm supertechs
Turbo: GT2871r .64
Manifold: ARTech™ Ramhorn Top Mount manifold
Downpipe Size/Style: 3.5" homemade
Exhaust Size: 3.5" homemade
Exhaust Components: Magnaflow 5x11x22 muffler
Intercooler Core Size: 550mm x 225mm x 64mm
Intake Manifold: Honda ITR + 70mm TB
Headwork: stock BP4W
Engine Management: Adaptronic E420c
Other Spoolin' Helpers/Hurters: EBC
Trans & Rear End Ratio: 6-speed, 3.6 LSD
Rear tire size: 215/45/16

FIFTH GEAR PULL:

RPM Boost(psi)
2388 2.9
2479 3.9
2575 4.7
2640 5.9
2768 6.9
2868 8.1
2934 8.8
3088 10.5
3158 11.6
3253 13.0
3340 13.9
3384 15.0
Now with VVT head + Skunk2 intake:
2753 3.3
2840 6
2908 8
3011 10.5
3104 12.9
3165 14.7 psi boost

Not bad for a old gt2871r 56trim
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Old 12-16-2018, 03:04 PM
  #343  
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Now that I have turbos, I will log and post my spool data.

This might give yo guys an idea about my "spool".
I was on a steep uphill, lugged the engine down to 1000 rpm in second gear on purpose, and as soon as I mashed the pedal (at 1000 rpm), I had 3-4 psi.
My boost starts at idle.
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Old 12-16-2018, 04:13 PM
  #344  
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Originally Posted by Godless Commie View Post
Now that I have turbos, I will log and post my spool data.

This might give yo guys an idea about my "spool".
I was on a steep uphill, lugged the engine down to 1000 rpm in second gear on purpose, and as soon as I mashed the pedal (at 1000 rpm), I had 3-4 psi.
My boost starts at idle.
oooh oooh, let's compare

4:10 + 6speed in 4th on flat ground, 1 bar boost point: 2652 RPM
(I am at 5280ft which means ambient is around 85kpa)

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Old 12-16-2018, 04:45 PM
  #345  
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Originally Posted by Ted75zcar View Post
oooh oooh, let's compare

4:10 + 6speed in 4th on flat ground, 1 bar boost point: 2652 RPM
(I am at 5280ft which means ambient is around 85kpa)
Give me a few weeks.
I can't hit 1 bar yet.
New engine, new setup, just started tuning, so I am taking baby steps with boost.
Max I can see at this point is about 7 - 8 psi.
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Old 12-18-2018, 11:30 PM
  #346  
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Might as well make this somewhat official

Chassis: 1991
Engine: '95 block, 83.5 Wiseco 8.5:1, VVT
Turbo: GTX2867R GEN II 0.64a/r
Supercharger: MP62 Gen 4
Manifold: Begi Cast
Downpipe Size/Style: Begi Divorced
Exhaust Size: 3"
Exhaust Components: 3" Enthuza metal cat + catback
Intercooler Core Size TC: Ebay bar/plate 28"x6"x2.5" ?
Intercooler Core Size SC: Unknown core size, Bell Ubercharger FMIC
Intake Manifold: B18 Honda
Headwork: +1mm OS I/Ex, Supertech heavy doubles, mild port/polish, bowl blend, de-shroud
Engine Management: DIYautotune MS3Pro module, Westfield MX5 adapter for NB1, several custom widgets
Other Spoolin' Helpers/Hurters: 5280ft elevation (15% off the top), e85, GM D510c, 4:10:1, compound turbo-super

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Mani-P TC-Boost-P Mani-Boost-P
(rpm) (kpa) (psi) (psi)
1435 83.4 -1.2 0.2
1615 126.8 1.0 6.5
1760 140.6 2.2 8.5
2006 163.5 3.8 11.8
2310 185.8 5.3 15.1
2707 208 10.1 18.3
2931 213.7 14.2 19.2
3112 202.7 14.5 17.5

Last edited by Ted75zcar; 12-19-2018 at 08:11 AM.
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Old 12-19-2018, 07:51 AM
  #347  
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Originally Posted by Ted75zcar View Post
Might as well make this somewhat official

Chassis: 1991
Engine: '95 block, 83.5 Wiseco 8.5:1, VVT
Turbo: GTX2867R GEN II 0.64a/r
Supercharger: MP62 Gen 4
Manifold: Begi Cast
Downpipe Size/Style: Begi Divorced
Exhaust Size: 3"
Exhaust Components: 3" Enthuza metal cat + catback
Intercooler Core Size TC: Ebay bar/plate 28"x6"x2.5" ?
Intercooler Core Size SC: Unknown core size, Bell Ubercharger FMIC
Intake Manifold: B18 Honda
Headwork: +1mm OS I/Ex, Supertech heavy doubles, mild port/polish, bowl blend, de-shroud
Engine Management: DIYautotune MS3Pro module, Westfield MX5 adapter for NB1, several custom widgets
Other Spoolin' Helpers/Hurters: 5280ft elevation (15% off the top), e85, GM D510c, 4:10:1

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Mani-P TC-Boost-P Mani-Boost-P
(rpm) (kpa) (psi) (psi)
1435 83.4 -1.2 0.2
1615 126.8 1.0 6.5
1760 140.6 2.2 8.5
2006 163.5 3.8 11.8
2310 185.8 5.3 15.1
2707 208 10.1 18.3
2931 213.7 14.2 19.2
3112 202.7 14.5 17.5
Did you forget to add the SC to the Other Spoolin' Helpers/Hurters section?
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Old 12-19-2018, 08:12 AM
  #348  
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Originally Posted by DNMakinson View Post
Did you forget to add the SC to the Other Spoolin' Helpers/Hurters section?
I listed it above, but I went ahead and updated for clarity. Thanks for the suggestion.
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Old 02-01-2019, 01:13 PM
  #349  
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Does anyone with a EFR or BB Garret capable of over 300 whp have rise time data like this? I'm interested mostly 2-3000 RPM range. Even "only" ~700ms from 0-20psi at 3k is noticeably laggy and feels like a slingshot.

I've found boost vs RPM data of limited use to assess low-rpm street ability and the time to spool dominates the response. None of this is a concern on the track or on an even moderate RPM WOT pull. Any flat foot shifting makes it moot as well.

At low RPM, I can get 5-10psi instantly but getting from there to 20-25 psi takes most of the time, even with the wastegate pressurized shut using a 4P EBC. I'm wondering if a lower-inertia, modern turbo would be noticeably different (<400ms from 0-20psi starting from 2-3000 RPM) than my old TD04HL-20T AR0.41.

6th gear:
Starting RPM, time from 100 to 240 kpa (20psi):
3000, ~700ms
3500, ~700ms
4000, ~360ms
4500, ~230ms
5000, ~330ms (5th gear)

Thanks!
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Old 02-05-2019, 08:08 AM
  #350  
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Do you have any idea what sort of internal stresses are created with 20 pounds of boost at 2000 RPM? The extreme side loading of the piston skirt and the connecting rod bearings at a time when there is extraordinarily little oil being slung on to the cylinder walls and pumped to the bearings?

I understand your goals are probably different than mine, but you should know the consequences.
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Old 03-05-2019, 03:05 AM
  #351  
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Hey y'all, 1.6L(egend) back again, since I got roasted when I thought 1.6's were pretty cool I had to go back and build a 'real' setup, and I could not be any happier with how this car performs. The spool is insane.

Engine: 2001 1884cc, 9.0:1 CR, w/ functional VVT (Although I can't get it to do anything below 2800)
Turbo: EFR6258, IWG, 0.64 A/R, T25 inlet
Manifold: Artech short runner bottom mount
Downpipe: Artech 3"
Exhaust Size: 3"
Exhaust Components: Catless straight pipe
Intercooler Core Size: 18.00" x 6.50" x 3.25", full 2.50" piping
Intake Manifold: Skunk2 w/ Skunk2 TB
Headwork: Mild Porting, blended bowl, no chamber work. Back-cut, stock sized valves, VS855 springs
Engine Management: MSPro
Other Spoolin' Helpers/Hurters: EBC, E85
Trans & Rear End Ratio: 5-Speed Getrag 260, 3.909
Rear tire size: 245/40R15

FOURTH GEAR PULL (1:1):

RPM Boost(psi)
2000 2.7
2100 3.6
2200 4.0
2300 4.3
2400 4.6
2500 5.1
2600 6.1
2700 7.3
2800 8.5
2900 10.2
3000 12.2
3100 13.7
3200 15.7
3300 17.8
3400 19.8
3500 21.7
Target 21psi to redline
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