I wan't to change my combo on my speed density

Yan88gt · 11-15-2001, 05:48 PM

I'm thinking about putting gt40 iron heads, cobra intake and crower baby cam or maybe the B cam to keep my 1.7 roller rockers. What do you guys think.

Unit 5302 · 11-15-2001, 07:48 PM

Not a bad combo. I don't know about the "baby" crower cam, but the B cam with 1.7's should be pretty beastly. Get an adjustable fuel pressure regulator, make sure your car is in tune, and you should be able to make that combo work.

84_GT350 · 11-16-2001, 03:56 AM

SD cars are really bitchy about cams. The GT40s and Cobra intake don't sound like a big problem...but the cam might cause problems. I don't know the specs on the Crower baby cam though, so I could be wrong. Just remember that SD systems can't adjust for increases in airflow and add fuel so you'll have to do it manually with the regulator. Like Unit said...just keep it tuned well and you should be ok.

MikeWeber · 11-16-2001, 05:20 AM

SD cars are finicky about cams at idle and part throttle because of the inevitable lose in engine vacuum. They rely heavily on the MAP sensor to determine engine load. A low vacuum signal tells the computer the engine is under load and it reacts the only way it knows how, with more fuel. The O2 sensors then read rich and the computer gets stuck in a weird loop it can't figure out.
Lesson is: go heads, intake, LT headers, and 1.72 RR and avoid the aftermarket cam until you can convert to mass air. The few hp at WOT really isn't worth the headache.

Stang Runner · 11-16-2001, 05:14 PM

I Am adding every thing but a cam I hope to get it runng

I thought I beeter stay with the stocker for now you might want to do the same.

11-15-2001, 05:48 PM	#1
Yan88gt Registered Member Join Date: Jun 2001 Location: Quebec canada Posts: 92	I wan't to change my combo on my speed density I'm thinking about putting gt40 iron heads, cobra intake and crower baby cam or maybe the B cam to keep my 1.7 roller rockers. What do you guys think. __________________ Ported stock heads and intake, 65mm throttle body, 1.7 roller rockers, pulley, superchip,afpr, electric fan, motorsport headers, magnaflow cat-back, hurst shifter, 3.55 gear, speed density computer 12.81@ 104.7 on E.T street (1.77)

11-16-2001, 03:56 AM	#3
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	SD cars are really bitchy about cams. The GT40s and Cobra intake don't sound like a big problem...but the cam might cause problems. I don't know the specs on the Crower baby cam though, so I could be wrong. Just remember that SD systems can't adjust for increases in airflow and add fuel so you'll have to do it manually with the regulator. Like Unit said...just keep it tuned well and you should be ok. __________________ 1984 1/2 GT350 (#842 Hatchback w/ T-tops)

11-16-2001, 05:14 PM	#5
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	I Am adding every thing but a cam I hope to get it runng I thought I beeter stay with the stocker for now you might want to do the same. __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

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11-15-2001, 07:48 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Not a bad combo. I don't know about the "baby" crower cam, but the B cam with 1.7's should be pretty beastly. Get an adjustable fuel pressure regulator, make sure your car is in tune, and you should be able to make that combo work.

11-16-2001, 05:20 AM	#4
MikeWeber Registered Member Join Date: Aug 2001 Location: Louisville, KY, USA Posts: 48	SD cars are finicky about cams at idle and part throttle because of the inevitable lose in engine vacuum. They rely heavily on the MAP sensor to determine engine load. A low vacuum signal tells the computer the engine is under load and it reacts the only way it knows how, with more fuel. The O2 sensors then read rich and the computer gets stuck in a weird loop it can't figure out. Lesson is: go heads, intake, LT headers, and 1.72 RR and avoid the aftermarket cam until you can convert to mass air. The few hp at WOT really isn't worth the headache.