do i need to use a msd btm thing or not?

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06-16-2003, 09:58 AM

2000vsm

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do i need to use a msd btm thing or not?

Ok, running t25 at 7psi seen at my manifold on my D series... do i need to retard any ign timing or do i really need a BTM unit? can i just manually retard IF NEEDED? None of the FAQ has anything on ign timing. thanks

06-16-2003, 10:04 AM

scttydb411

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Join Date: Dec 2002

Posts: 1,008

Re:do i need to use a msd btm thing or not?

i've got one and i'm retarding 1/3 degree per 1 pound of boost. no other retarding. i've got it as a safety measure incase i get bad gas or if something else happens. it wasn't too expensive and the only new part i purchased for my hmt setup. i think it comes out to almost 2.5 degrees at 8psi. if you retard 2 degrees on your dist you will probably be ok, but you will lose power in the lower end.

06-16-2003, 10:20 AM

2000vsm

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Re:do i need to use a msd btm thing or not?

2 degrees only lol, i was gonna retard like 7 degrees... (1 deg/psi)

but this 2 deg retard.. is it respect to the stock 16BTDC (ie. the middle line of the timing, you know there are 3 lines indicating 18BTDC, 16BTDC-stock, 14BTDC)

so which one is it in respect of? if it's stock then i can just go 14, or even 13 to be safe..i ran my car at 8bdtc before and lowend wasn't bad

ALSO.. were you the guy who told me about rotating my turbo 30 deg to clear the A/C? how do you do this? is your turbo a t25?

06-16-2003, 10:26 AM

2000vsm

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Re:do i need to use a msd btm thing or not?

did you dyno your car before the turbo? how come you getting only 145whp? i've seen most of our cars (well at least the d16y

get like 165 min, to around 180..but that's at around 7-8psi

06-16-2003, 12:14 PM

RENR

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Join Date: Jan 2003

Posts: 4,401

Re:do i need to use a msd btm thing or not?

at 7psi your stock timing should be fine. you shouldnt need to adjust anything. lates.

06-16-2003, 02:33 PM

scttydb411

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Re:do i need to use a msd btm thing or not?

Quote:

Originally Posted by 2000vsm

did you dyno your car before the turbo? how come you getting only 145whp? i've seen most of our cars (well at least the d16y

get like 165 min, to around 180..but that's at around 7-8psi

stock d16y7 gets about 98whp. at 5.5-6psi i was getting 145whp and was still too rich killing some hp. i've since cranked it up to 8psi and am est appx 160-165. when i get a chance to get it back on the dyno will be cranking it up to 10psi. don't know if i want to daily drive on it at 10psi though, but i probably will.

Quote:

Originally Posted by 2000vsm

ALSO.. were you the guy who told me about rotating my turbo 30 deg to clear the A/C? how do you do this? is your turbo a t25?

yeah...i'm using a td04L off '02 wrx. when i made my adapter plate instead of it just being mounted parallel with the block/core support, it is rotated about 30-35 degrees so that the compressor inlet just clears the ac compressor. i just had to move my condensor fan to in front of the condensor.

06-16-2003, 11:06 PM

2000vsm

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Re:do i need to use a msd btm thing or not?

how did you exactly rotate the damn thing, like drill bolts differently?

06-16-2003, 11:09 PM

2000vsm

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Re:do i need to use a msd btm thing or not?

what i mean is like did you drill the STD manifold bolt pattern on a 30 deg angle or the turbo pattern? i know to use steel but how did you get the tools to drill all the stuff?? you have access to this stuff?

also, so it's REALLY necessary to move the condensor fan to the front (ie. behind the bumper cover)?? so i guess i have to aim the fan the other way or something??