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Author Topic: Injector style differences  (Read 1129 times)

Offline Mike Schmid

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Injector style differences
« on: January 24, 2004, 10:12:46 am »
What's the operational and performance difference between the different styles of injectors?  ball, pintle, disc etc
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Offline Fraser Cassells

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Injector style differences
« Reply #1 on: January 24, 2004, 10:28:37 am »
Check this out Mike.

http://www.dsm-performance.com/ourinjectors.php

addd this link too, very good read.

http://jemperf.tripod.com/dfi.html
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Offline Mike Schmid

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Injector style differences
« Reply #2 on: January 24, 2004, 01:13:29 pm »
Good links, thanks Fraser.  The picture on the first link is cool.  The self cleaning/idle/delivery quality properties is what I was looking for.  

Looking at his formula and using the .56 bsfc you need at least 750cc's to start making any real power though...   :?  hmmm...

How big an injector can you run on a 1G with SAFC?  with that and a 2G MAS too?
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DSMs - fun when they run

'92 TSi AWD AT - 180bhp
'93 TSi AWD - 195bhp
'90 Laser RS NT - *sold*
'71 Camaro - *sold*

Offline John Hartman

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Injector style differences
« Reply #3 on: January 24, 2004, 02:57:52 pm »
hehe, well Fraser is running a 2g maf, and a big ass Frank and runs so close to 11's as not to be funny and he does it on 510s  :)
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Mike Meron

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Injector style differences
« Reply #4 on: January 24, 2004, 03:11:58 pm »
i'm about to put a set of 450's in his car as well!!! hoping for 11's
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Offline Mike Meron

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Injector style differences
« Reply #5 on: January 24, 2004, 03:18:29 pm »
i'm about to put a set of 450's in his car as well!!! hoping for 11's
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Offline John Hartman

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Injector style differences
« Reply #6 on: January 24, 2004, 03:55:59 pm »
a second set??   8)
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Fraser Cassells

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Injector style differences
« Reply #7 on: January 24, 2004, 05:27:03 pm »
No thanks on the offer of 450s there Mike.  Kimyee has mine if I ever feel the desire to grenade my motor.

 510-550s are just about the best for a normal street driven monster, add race gas/more pressure and you have the headroom to pull off better numbers with smaller injectors.

I would not tell anyone to run small injectors if they wish to hit low 12s or high 11s, that would be silly. :)

As for how big an injector you can run with an AFC, I would imagine anything under 900cc would be managable. Idle being affected the most with larger ones.

(900cc being twice the size of stock)<---thats my thinking
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1990 AWD Talon, Cumulative 432WHP parts depository...soldinated!
2008 911 Turbo
2014 Audi S4
2011 Ducati Hypermotard

Offline Andrew Scott

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Injector style differences
« Reply #8 on: January 24, 2004, 06:23:24 pm »
Quote from: "Mike Schmid"
Good links, thanks Fraser.  The picture on the first link is cool.  The self cleaning/idle/delivery quality properties is what I was looking for.  

Looking at his formula and using the .56 bsfc you need at least 750cc's to start making any real power though...   :?  hmmm...

How big an injector can you run on a 1G with SAFC?  with that and a 2G MAS too?


well, the SAFC you can run up to - 50% correction, and with a 2g mas you usually need to correct to +10 %, so that amounts to 60% bigger injectors, 60% bigger than 450s is 720s
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Offline Mike Schmid

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Injector style differences
« Reply #9 on: January 24, 2004, 09:19:27 pm »
Yeah, I worked out those percentages and that's about what they looked like...

The problem with using that formula is pulling the bsfc as just "ya know, about .56"  If the bsfc changes it changes everything.  

I was thinking low 12s on pump gas is a good goal... The problem with street/strip cars is when you get to 11.99 you need a 4 point rollbar or you can forget about racing at the strip.  I don't think I want a rollbar in the Talon...
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DSMs - fun when they run

'92 TSi AWD AT - 180bhp
'93 TSi AWD - 195bhp
'90 Laser RS NT - *sold*
'71 Camaro - *sold*

Offline John Hartman

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Injector style differences
« Reply #10 on: January 24, 2004, 10:35:36 pm »
nope me niether.

but who the hell am I kidding, I MIGHT need a driveshaft loop but thats about it.
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Travis Merrick

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Injector style differences
« Reply #11 on: January 24, 2004, 10:42:44 pm »
John you have a drive shaft loop, u dont need to worry about it =)  look under the car, u have 2 of them.
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2 TSi AWD - 14.2@98mph - RIP

85 SJ413 w/ Toy axles

Offline John Hartman

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Injector style differences
« Reply #12 on: January 24, 2004, 10:46:12 pm »
What did you do to my car when I was at the hockey game!!??


hehe, do we really?  Are they legal for 12's at Mission?
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Travis Merrick

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Injector style differences
« Reply #13 on: January 24, 2004, 10:56:51 pm »
Fraser passes with it, 2 bearing loops, we have such a small driveshaft it wouldnt do much damage i think if it dropped.
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2 TSi AWD - 14.2@98mph - RIP

85 SJ413 w/ Toy axles

Offline Andrew Scott

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Injector style differences
« Reply #14 on: January 25, 2004, 02:06:37 am »
Quote from: "Mike Schmid"
bsfc

Whats that?
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Parked: 1989 240sx - Esso 87 octane, Superstore generic 10w30, Japanese automatic climate control, Pioneer AVIC-Z3 navagation, Tien Flex Coilovers, Poly bushings, R34 Brakes (front and rear), Cusco tri-point strut braces (front+rear), 1998 tail lights, rear+side valance, adjustable toe and camber arms, cusco sway bars, helical rear diff, Volk TE37s - For sale!
Daily: 2008 BMW M3 DCT
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