Is a GT40 5.0 worth the trouble? July 28, 2008, 07:42:12 PM Hey guys. I'm sorry for the newbie question, but is it worth the trouble (performance wise), to go through the trouble of putting a GT40 5.0 in one of our cars, instead of a normal 5.0 H.O engine? If you get your hands on a H.O. 5.0, you don't have to worry about changing the things you have to change on a GT40 5.0 to get it to work in a Fox chassis car. I know the GT40 heads flow better than E7's do and the GT40's intake flows better, but like I said, do most of you think the performance improvement, or potential of a GT40 makes it worth the extra work? Thanks for any and all replies.Vic Quote Selected
Is a GT40 5.0 worth the trouble? Reply #1 – July 28, 2008, 08:12:09 PM you would want to change the cam in the explorer motor. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #2 – July 28, 2008, 08:29:42 PM Quote from: SLEEPER T-BIRD 87;229536you would want to change the cam in the explorer motor.The search function really is a wonderful thing! By switching around key search words I was using, I brought up a lot of good info on this topic. I just read that Explorer cams were milder than H.O. cams. After finding the info I did, it looks like my best bet will be to go the 5.0 H.O. route. Down the road, I guess I could always tweak my combo. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #3 – July 28, 2008, 08:43:19 PM The GT-40 is to the HO what the HO is to the SO...Unported, E7 heads are , go with the 40 and put a little more cam in it... Quote Selected
Is a GT40 5.0 worth the trouble? Reply #4 – July 28, 2008, 09:26:30 PM Quote from: TurboCoupe50;229542The GT-40 is to the HO what the HO is to the SO...Unported, E7 heads are , go with the 40 and put a little more cam in it...Because of the pistons in the GT-40, aren't you really limited on how much cam you can run without clearance issues? I was under the impression that PTV clearance was even more of an issue with 40's than with regular HO's. Do you have any recommendations on a good cam for a 40? I think I can get my hands on a 40 out of a 98 Explorer. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #5 – July 28, 2008, 09:56:48 PM There are GT-40 high performance cams out there just google them or go to your local racing shop and order them. I seen a GT-40 in a factory mustang 5.0 and I drove it too and the cam was like the best cam in the 5.0 mustang motor just get a mustang motor and put a Bigger lift GT-40 cam and sprap u self and also get rady to wash your drales when u get home cause the first time u drive it the coolest feeling, I neaver driven a 5.0 mustang motor and had a better experance and the best thing is the car got 20t miles in the city with just a GT-40 cam and 3.83 gears. If that doesn't convience u to do this set up than I want to know what your smoken cause so I can stay away LOL.:burnout: Quote Selected
Is a GT40 5.0 worth the trouble? Reply #6 – July 28, 2008, 10:31:00 PM Ummmmmmm...... Huh? Quote Selected
Is a GT40 5.0 worth the trouble? Reply #7 – July 28, 2008, 10:32:33 PM Quote from: 88TurboCoupeman01;229553There are GT-40 high performance cams out there just google them or go to your local racing shop and order them. I seen a GT-40 in a factory mustang 5.0 and I drove it too and the cam was like the best cam in the 5.0 mustang motor just get a mustang motor and put a Bigger lift GT-40 cam and sprap u self and also get rady to wash your drales when u get home cause the first time u drive it the coolest feeling, I neaver driven a 5.0 mustang motor and had a better experance and the best thing is the car got 20t miles in the city with just a GT-40 cam and 3.83 gears. If that doesn't convience u to do this set up than I want to know what your smoken cause so I can stay away LOL.:burnout:My google search is showing me that the "GT-40 cams" you're talking about are regular, old alphabet cams dude? B303 & E303 cams. That's what FMS is listing as being used in the GT40 crate motor. I know I can do better than an alphabet cam. That's old technology there. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #8 – July 28, 2008, 10:42:38 PM Well the guy told me it had a t-40 cam and I could tell it had a cam in it so I don't sorry guys. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #9 – July 28, 2008, 11:30:40 PM Any mild cam should work your pistons have the valve reliefs in them, just check w/us first. When you call they are going to cautiously tell you to always check PtV clearance for the safe side nomatter what. That’s what they told me w/a stock HO motor but then I put on bigger GT40 heads milled .040 off them w/a .039 head gasket. I never checked. Picking my motor/machine shops mind he told me I have plenty of room. Heres my set up http://foxtbirdcougarforums.com/showthread.php?t=17223 Quote Selected
Is a GT40 5.0 worth the trouble? Reply #10 – July 29, 2008, 01:44:18 AM Get Steeda Cam #18http://www.steeda.com/products/steeda_18_street_camshaft.phpIt says it made to go with the Gt40 set-upI don't know anything except i am gonna Try it in my 5.0 HO T-Bird and get some gt40 heads and a few more extras like a typhoon intake which looks close to a Explorer Intake and hope that it all works like it says and that it might be a good set-up. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #11 – July 29, 2008, 02:17:22 AM There are plenty of guys putting down 250hp to the rear wheels with a stock HO cam, GT40P heads, Explorer intake, and 1.7 roller rockers. You may be interested in my engine build; click on the 270rwhp project link in my sig below, or you can also follow my thread on the Corral:http://forums.corral.net/forums/showthread.php?t=1036977I'm basically building a GT40 setup for my car; should propel me to mid 13s. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #12 – July 29, 2008, 01:15:37 PM I'm basically running an Explorer motor with a cam in it in my car. I have no complaints, except that it requires a higher stall torque converter, and bigger rear tires, all of which I haven't gotten yet:hick: Quote Selected
Is a GT40 5.0 worth the trouble? Reply #13 – July 29, 2008, 05:32:18 PM Victor I'm running an Explorer motor in my car. It has valve reliefs in the pistons. Quote Selected
Is a GT40 5.0 worth the trouble? Reply #14 – July 29, 2008, 06:46:11 PM Unless you're gonna run a wild, long, duration cam, the valve to piston clearance is BS... Clearance should be similar if not same as a HO...Put the Stage 1 Trick Flow cam in it(what I run)... It will have a little lope at idle(likes 900-1000 rpm), and pull like crazy from 3000-6000 rpms... You'll also need a Mass Air Setup and at least a 2400 Stall converter(a 3000-3200 is better)If that's too wild for you, go with the stock HO cam... For the money you'd spend on something slightly better, you can buy 1.7 roller rockers... Quote Selected
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