c-4 or c-6???

LX XLR8R · 05-02-2001, 10:58 AM

me and my buddy are starting a new car right now..a 351 in a 85 notchback..we are def ganna run an auto and i was ganna run a c-4 till i was told 2day that the c-6 isnt that much hevier and the c-4 runs out of gear too quickly..what is better for a car that wont see faster than 10's??also what are the gear ratios in both trannies..

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

juiceman · 05-02-2001, 02:50 PM

use the c-4. theyre better for racing. they dont run out of gear quicker.noone has ever had a problem with a c-4 and thats why theyre used in pro 5.0 cars. all trannies have a final drive of 1:1 except od or stick which have 1:1 in 4th gear. unless you plan on using 4.56 gears you wount have a prob on the street.

LX XLR8R · 05-02-2001, 03:12 PM

thats what i thought..was was planning on using a c-4..my buddy also said you build em..i have yet to fool around with automatics and carbed cars so this is kinda new to me..EFI and i can do anything but this old tech i never had the chance to fool arond with yet..im sure it wont come hard to me..only thing i got to learn is how to tune a carb

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

screaming_pas$enger88 · 05-02-2001, 04:20 PM

C-4 all the way =)

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AIM= OneQuickStang

05-02-2001, 04:30 PM

Another vote for the C-4

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91LX 306 S-Trim & 89GT NOS Stage II

juiceman · 05-02-2001, 10:41 PM

when youre ready to build the motor let me know. ill run down there and help you out if you need it. and if you need someone to build the motor or do other work let me know.

dinomite · 05-03-2001, 04:53 PM

Ya, you want the c-4. The c-6 is just beefier, it can handle a lot more power, but is physically MUCH larger.

05-02-2001, 10:58 AM	#1
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	c-4 or c-6??? me and my buddy are starting a new car right now..a 351 in a 85 notchback..we are def ganna run an auto and i was ganna run a c-4 till i was told 2day that the c-6 isnt that much hevier and the c-4 runs out of gear too quickly..what is better for a car that wont see faster than 10's??also what are the gear ratios in both trannies.. ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

05-02-2001, 02:50 PM	#2
juiceman Registered Member Join Date: Jan 2001 Location: ny Posts: 197	use the c-4. theyre better for racing. they dont run out of gear quicker.noone has ever had a problem with a c-4 and thats why theyre used in pro 5.0 cars. all trannies have a final drive of 1:1 except od or stick which have 1:1 in 4th gear. unless you plan on using 4.56 gears you wount have a prob on the street.

05-02-2001, 03:12 PM	#3
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	thats what i thought..was was planning on using a c-4..my buddy also said you build em..i have yet to fool around with automatics and carbed cars so this is kinda new to me..EFI and i can do anything but this old tech i never had the chance to fool arond with yet..im sure it wont come hard to me..only thing i got to learn is how to tune a carb ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

05-02-2001, 04:20 PM	#4
screaming_pas$enger88 Registered Member Join Date: Apr 2001 Location: Massachusetts Posts: 35	C-4 all the way =) ------------------ AIM= OneQuickStang

05-02-2001, 04:30 PM	#5
Sparkplug Guest Posts: n/a	Another vote for the C-4 ------------------ 91LX 306 S-Trim & 89GT NOS Stage II

05-02-2001, 10:41 PM	#6
juiceman Registered Member Join Date: Jan 2001 Location: ny Posts: 197	when youre ready to build the motor let me know. ill run down there and help you out if you need it. and if you need someone to build the motor or do other work let me know.

05-03-2001, 04:53 PM	#7
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	Ya, you want the c-4. The c-6 is just beefier, it can handle a lot more power, but is physically MUCH larger.