hey speed density guys?????

vande97 · 03-24-2001, 11:27 PM

I have an 88lx and i am wondering what kind of heads intake and cam i can use on my car without getting into trouble with it running smooth? I want to still want to be able to drive it every day and not have it idol like shi* or run weird, but i still want power. I want to be able to blow anything off the road that is producton made(CHEVY OR ANYTHING FOR THAT MATTER) i dont want to do a mass air conversion because i am not that good with wiring. i have 410s in the rear and that has helped quit alot but i tangled with a cobra tonight and well it was not pretty. I would like to keep the price a low as possible. Also it has 97K on it should it get the lower end rebuilt before adding anything? THAKS IN ADVANCE

QuantumMotorsports · 03-25-2001, 09:13 AM

I have heard of people running lots of different kinds of head/intake/cam setups with speed density, I would say you'd definately be safe with an E cam or some other fairly mild motorsport cam and the heads and intake you could probably either go GT40 heads and cobra intake and without any other mods you'd be running okay. Your problem is going to be running too lean because the computer won't realize you're getting much more air into the cylinder so you might have to get an adjustable fuel pressure regulator to richen the mixture.

------------------
Michael Black
Quantum Motorsports
Norman, Oklahoma

1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" duals w/ 2 chamber flowmasters, T5 tranny
New E/T!!!
14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

Unit 5302 · 03-25-2001, 12:18 PM

You'll definatly need an AFPR. Without it, there will be no way to tune you S/D system. The fuel pressure is how you trick the computer into thinking everything is just the same as it was before.

I've seen the B-303 and the E-303 used on the SD cars, 88workcar has run them both. I think he's had better luck with the B cam though.

88workcar is running low 12's with Ecam, Edelbrock heads, roller rockers, and Edelbrock intake? Still, I think his car may be a little of a freak. Those are super quick numbers. Running better than the stock LS1's is about as good as I think you should expect. High 12's. 88workcar has done a ton of tuning, he's been very aggressive in trying to get everything out of SD as he possibly can. And he's got suspension mods.

Oh, and yes, I'd rebuild the car before making serious mods. Most 5.0's will begin to decline at 120k, at least in my experiance. Adding hi po parts for another 20k of life is kinda dumb IMHO.

vande97 · 03-25-2001, 04:51 PM

thanks for the advice. is there anything else i should consider. how much do you think a shop should run me for a rebuild minus the heads, cam.

StreetStang007 · 03-26-2001, 10:27 AM

Ok man You will be able to run evry thing but the cam it will mess with the driveablity problems i promise i see it all the time i got a speed density car just but some good heads and a decent intake don't expect record breaking times until you go mass air your computer will not take these types of mods hope this helps

vande97 · 03-26-2001, 01:57 PM

A buddy of mine has a cam in his but it is mild i was just wondering how far i can go with the cam. I have also herd of cars hitting low 12 with speed density is this true

Unit 5302 · 03-26-2001, 02:16 PM

Okay, if you don't believe me, take a look at 88workcars profile.

He's running low 12's on SD.

People also say you can't run 24lb injectors on SD, BS. I've seen it personally. My friend drove his 80,000mi with 24lber's on a stock 87GT (needed injector swap, couldn't find 19lbers cheap). The ONLY problems he had was an idle surge, and a light rev at startup.

There are so many BS myths about SD out there it's ridiculous.

slow87GT · 03-26-2001, 03:50 PM

I have sd and E303, it runs like absolute **** , the stock cam ran great

88workcar has been down the road, but he's tough to get ahold of or share advice, he's at the limit of the injectors(me2)

stay stock cam you'd be ok, fuel pressure isn't needed, that just helps mask a pump that's maxed out

I speak from experience, not what I heard

slow87GT · 03-26-2001, 03:54 PM

btw, if i were to try cam again, my first choice'd be wolverine 1190, then Kaufman stage2(if you can find one), last B303

I dont know, but the drivability of the E is pretty bad w/sd

stng87 · 03-26-2001, 06:44 PM

why is it that the drivability goes to he** with speed density if this is true?

slow87GT · 03-27-2001, 09:56 AM

its because SD sets part throttle strategy based on vacuum, if there is no vacuum, it'll see it as a load and dump to much fuel in

if you ask 88workcar, he'll tell you he only runs 41psi fuel

you can run midto low 12's SD, then ya'll start to run into probs

03-24-2001, 11:27 PM	#1
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	hey speed density guys????? I have an 88lx and i am wondering what kind of heads intake and cam i can use on my car without getting into trouble with it running smooth? I want to still want to be able to drive it every day and not have it idol like shi* or run weird, but i still want power. I want to be able to blow anything off the road that is producton made(CHEVY OR ANYTHING FOR THAT MATTER) i dont want to do a mass air conversion because i am not that good with wiring. i have 410s in the rear and that has helped quit alot but i tangled with a cobra tonight and well it was not pretty. I would like to keep the price a low as possible. Also it has 97K on it should it get the lower end rebuilt before adding anything? THAKS IN ADVANCE

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03-25-2001, 09:13 AM	#2
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	I have heard of people running lots of different kinds of head/intake/cam setups with speed density, I would say you'd definately be safe with an E cam or some other fairly mild motorsport cam and the heads and intake you could probably either go GT40 heads and cobra intake and without any other mods you'd be running okay. Your problem is going to be running too lean because the computer won't realize you're getting much more air into the cylinder so you might have to get an adjustable fuel pressure regulator to richen the mixture. ------------------ Michael Black Quantum Motorsports Norman, Oklahoma 1988 Merc Cougar 5.0 HO, Ported and Polished E7TEs, 2.25" duals w/ 2 chamber flowmasters, T5 tranny New E/T!!! 14.626 @ 94.94mph, 2.194 60' time, a little better than last time. Keep in mind this thang is heavy (3590lbs) Finally 14s!!!!

03-25-2001, 12:18 PM	#3
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	You'll definatly need an AFPR. Without it, there will be no way to tune you S/D system. The fuel pressure is how you trick the computer into thinking everything is just the same as it was before. I've seen the B-303 and the E-303 used on the SD cars, 88workcar has run them both. I think he's had better luck with the B cam though. 88workcar is running low 12's with Ecam, Edelbrock heads, roller rockers, and Edelbrock intake? Still, I think his car may be a little of a freak. Those are super quick numbers. Running better than the stock LS1's is about as good as I think you should expect. High 12's. 88workcar has done a ton of tuning, he's been very aggressive in trying to get everything out of SD as he possibly can. And he's got suspension mods. Oh, and yes, I'd rebuild the car before making serious mods. Most 5.0's will begin to decline at 120k, at least in my experiance. Adding hi po parts for another 20k of life is kinda dumb IMHO.

03-25-2001, 04:51 PM	#4
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	thanks for the advice. is there anything else i should consider. how much do you think a shop should run me for a rebuild minus the heads, cam.

03-26-2001, 10:27 AM	#5
StreetStang007 Registered Member Join Date: Jan 2001 Location: oklahoma city oklahoma USA Posts: 9	Ok man You will be able to run evry thing but the cam it will mess with the driveablity problems i promise i see it all the time i got a speed density car just but some good heads and a decent intake don't expect record breaking times until you go mass air your computer will not take these types of mods hope this helps

03-26-2001, 01:57 PM	#6
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	A buddy of mine has a cam in his but it is mild i was just wondering how far i can go with the cam. I have also herd of cars hitting low 12 with speed density is this true

03-26-2001, 02:16 PM	#7
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Okay, if you don't believe me, take a look at 88workcars profile. He's running low 12's on SD. People also say you can't run 24lb injectors on SD, BS. I've seen it personally. My friend drove his 80,000mi with 24lber's on a stock 87GT (needed injector swap, couldn't find 19lbers cheap). The ONLY problems he had was an idle surge, and a light rev at startup. There are so many BS myths about SD out there it's ridiculous.

03-26-2001, 03:50 PM	#8
slow87GT Registered Member Join Date: Jun 2000 Location: Tonawanda,NY Posts: 71	I have sd and E303, it runs like absolute **** , the stock cam ran great 88workcar has been down the road, but he's tough to get ahold of or share advice, he's at the limit of the injectors(me2) stay stock cam you'd be ok, fuel pressure isn't needed, that just helps mask a pump that's maxed out I speak from experience, not what I heard

03-26-2001, 03:54 PM	#9
slow87GT Registered Member Join Date: Jun 2000 Location: Tonawanda,NY Posts: 71	btw, if i were to try cam again, my first choice'd be wolverine 1190, then Kaufman stage2(if you can find one), last B303 I dont know, but the drivability of the E is pretty bad w/sd

03-26-2001, 06:44 PM	#10
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	why is it that the drivability goes to he** with speed density if this is true?

03-27-2001, 09:56 AM	#11
slow87GT Registered Member Join Date: Jun 2000 Location: Tonawanda,NY Posts: 71	its because SD sets part throttle strategy based on vacuum, if there is no vacuum, it'll see it as a load and dump to much fuel in if you ask 88workcar, he'll tell you he only runs 41psi fuel you can run midto low 12's SD, then ya'll start to run into probs