Ford Engine HELP...

Bill Harris · 12-20-2008, 06:57 PM

3.73 !!!!

You gotta be kidding. You have a small block that is good for well over 8000 RPM and your are using a 5000 RPM converter and a 3.73 gear????? WAY wrong. I would expect to see a converter in the 6000 range and a 5.83 to 6.00 rear gear. What MPH did you go on the few passes you did make? The MPH will tell you if you have enough HP. If you are running 122+ MPH, you have pleny of power, you just aren't getting that thing moving off the line. A 60' of 1.72 speaks volumes. You should be under 1.40 to go mid 10's.

Freddie · 12-20-2008, 07:38 PM

Best MPH was 119, consistantly 99/101 in the 1/8th.

Stephen & Horace Johnson · 12-20-2008, 08:00 PM

Quote:

Originally Posted by Freddie

Best MPH was 119, consistantly 99/101 in the 1/8th.

if this is the mph you are running then your car is running out of steam, my street car runs 124mph in the 1/4 in 99mph in the 1/8. This is a n/a 331 with a 5speed. You need more gear under this car....ala 4.30-4.56

Bill Harris · 12-20-2008, 08:06 PM

I agree, your running out of HP on the top end. Even so, if you had a respectable 60 in the low 1.40's you should be running 11.0's with what you have. Your not going to get there without a lot more gear.
I don't see where a glide is gonna help. There is no reason on earth why you shouldn't be able to get your C4 to live long and work great. There are c4's behind 750+ HP big blocks that do just fine.

Freddie · 12-20-2008, 08:08 PM

What gear are you guys running in your Auto SS cars? I have had people tell me the 3.73's were great for what i want to run, and yet others say I need at least a 4.30. I know most SS cars make the absolute most out of what they are allowed.

RPM5595 · 12-20-2008, 08:38 PM

The PG will absoluteley kill the ets. I cant believe someone told you 3.73's were the way to go. With a 28" tire I would recommend either a 4.56 or 4.86 depending on how high you want to spin it. The other thing that draws a red flag for me is the mph you have seen and I would MAKE SURE the valve springs are up to snuff. Just because you dont hear a audible "valve float" doesnt mean they arent out of control. As others have said the dyno may help but if it's still in the car I would try the new rear gears first WITH a C4. 3.73's had to be killing that poor thing. Hope this helps.
Jay

12-20-2008, 06:57 PM	#1
Bill Harris Member Join Date: Mar 2002 Location: Ooltewah, TN Posts: 421 Likes: 13 Liked 26 Times in 13 Posts	Re: Ford Engine HELP... 3.73 !!!! You gotta be kidding. You have a small block that is good for well over 8000 RPM and your are using a 5000 RPM converter and a 3.73 gear????? WAY wrong. I would expect to see a converter in the 6000 range and a 5.83 to 6.00 rear gear. What MPH did you go on the few passes you did make? The MPH will tell you if you have enough HP. If you are running 122+ MPH, you have pleny of power, you just aren't getting that thing moving off the line. A 60' of 1.72 speaks volumes. You should be under 1.40 to go mid 10's. __________________ Bill Harris ex 2172 STK ex 2272 S/S

12-20-2008, 07:38 PM	#2
Freddie Member Join Date: Jul 2005 Location: Tampa Fla / Anderson SC Posts: 334 Likes: 12 Liked 3 Times in 2 Posts	Re: Ford Engine HELP... Best MPH was 119, consistantly 99/101 in the 1/8th. __________________ NHRA: Comp 2200 - S/C 2201 NMRA 2012 Outlaw 10.5 #10

12-20-2008, 08:06 PM	#4
Bill Harris Member Join Date: Mar 2002 Location: Ooltewah, TN Posts: 421 Likes: 13 Liked 26 Times in 13 Posts	Re: Ford Engine HELP... I agree, your running out of HP on the top end. Even so, if you had a respectable 60 in the low 1.40's you should be running 11.0's with what you have. Your not going to get there without a lot more gear. I don't see where a glide is gonna help. There is no reason on earth why you shouldn't be able to get your C4 to live long and work great. There are c4's behind 750+ HP big blocks that do just fine. __________________ Bill Harris ex 2172 STK ex 2272 S/S

12-20-2008, 08:08 PM	#5
Freddie Member Join Date: Jul 2005 Location: Tampa Fla / Anderson SC Posts: 334 Likes: 12 Liked 3 Times in 2 Posts	Re: Ford Engine HELP... What gear are you guys running in your Auto SS cars? I have had people tell me the 3.73's were great for what i want to run, and yet others say I need at least a 4.30. I know most SS cars make the absolute most out of what they are allowed. __________________ NHRA: Comp 2200 - S/C 2201 NMRA 2012 Outlaw 10.5 #10

12-20-2008, 08:38 PM	#6
RPM5595 Member Join Date: Mar 2002 Location: Nashua,Iowa Posts: 136 Likes: 84 Liked 32 Times in 14 Posts	Re: Ford Engine HELP... The PG will absoluteley kill the ets. I cant believe someone told you 3.73's were the way to go. With a 28" tire I would recommend either a 4.56 or 4.86 depending on how high you want to spin it. The other thing that draws a red flag for me is the mph you have seen and I would MAKE SURE the valve springs are up to snuff. Just because you dont hear a audible "valve float" doesnt mean they arent out of control. As others have said the dyno may help but if it's still in the car I would try the new rear gears first WITH a C4. 3.73's had to be killing that poor thing. Hope this helps. Jay __________________ Jay Roeder facebook.com/racefuelsales Former N/SA , Soon to be SS/AS, Renegade Race Fuel dealer

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode