Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 240cc.

Reply Subscribe

Thread Tools

Search this Thread

07-03-2006, 11:51 PM

baker_jeff

1.5 BAR

Thread Starter

Join Date: Apr 2006

Posts: 704

Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 240cc.

So it runs super super lean on a 450cc map, and even a 390 map, and runs decent (little bit rich) on a 240cc basemap. WTF? The injectors are black tops, and they say "450" on them. Any ideas?

07-04-2006, 12:29 AM

91efate

1.5 BAR

Join Date: Oct 2004

Posts: 1,183

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 240cc.

Quote:

Originally Posted by baker_jeff

So it runs super super lean on a 450cc map, and even a 390 map, and runs decent (little bit rich) on a 240cc basemap. WTF? The injectors are black tops, and they say "450" on them. Any ideas?

try swapping the black tops with blue top dsm's like i said in the other post. this way i can say i told ya so

07-04-2006, 01:05 AM

HMTguy

Guest

Posts: n/a

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 24

If they say MDL450 on them, they're 450's

07-05-2006, 12:19 PM

baker_jeff

1.5 BAR

Thread Starter

Join Date: Apr 2006

Posts: 704

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 24

Quote:

Originally Posted by jagojon3

If they say MDL450 on them, they're 450's

What would cause such low fuel pressure if they really are 450s? Its running very well right now on a 290cc map.

07-05-2006, 12:24 PM

z1guy

1.5 BAR

Join Date: Mar 2006

Posts: 835

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 24

im sure you used a resistor box or inline resistors if needed right

07-05-2006, 06:26 PM

Ayeso

0.5 BAR

Join Date: Apr 2005

Posts: 76

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 240cc.

he had a set of bluetops , my old ones, but he wanted to keep the "newer 450s" and now yeah.. yes he has a resistor box, its an obd0 car.

Everywhere ive read it says all dsm injectors are peak and hold. Anyone have evidence to show otherwise?

07-05-2006, 06:28 PM

soontobeDA

1.0 BAR

Join Date: Apr 2006

Posts: 439

Re: Blacktop DSM injectors, car runs like ---- on a 450map, runs awesome on a 240cc.

all dsm are peak and hold

BLUE TOPS and blacktops TUNE DIFFERNTLY

a 450 blue top on X car is good afr

a 450 black top on Z car is running lean or rich

its becuase of the spray pattern