more power from a rebuild
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more power from a rebuild - 5/13/2008 1:11:23 PM
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joe_5.0
Posts: 68
Joined: 5/1/2008
From: oregon
Status: offline
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ive got an oil leak on my motor that causes smoking and it pisses me off.i was told that it could be the lower intake leaking to the back of my motor so im gonna replace the gasket and if that dont fix it im going to look into building the motor into a carburated 300-350 horsepower and 350-400 torque.i have a doug herbert performance catalog that has a "budget rebuild kit" for 500 bucks that includes: speed pro flat top pistons,clevite bearings, melling oil pump, double roller timing set, all the gaskets, herbert perfomance hydraulic cam, hydralic lifters. i can order it with thirty over pistons but i might go for stock sized pistons.id keep the stock crank and put some gt 40p heads from an explorer and some shorty headers. then id go with an edelbrock performer manifold and probably a 650 750 cfm carb.then id put a msd ignition on it.id probly put some 1.6 rockers on the heads also. would this be much of an improvment over my 89 lxs stock 5.0? and could i use my stock fuel pump and lines?im probably gonna instal a fuel cell so can i stick my stock pump in that? i want to re-use most of the pullies and stuff of my engine except the ac.what other things can i remove from my motor.what else should i do? will i be making enough power to need a new transmision and rear end? also how hard would installing some 3.73 gears in my 8.8 be?
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trying to be fast
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RE: more power from a rebuild - 5/13/2008 1:17:17 PM
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Pony 5.0
Posts: 244
Joined: 4/7/2007
From: Riverview, FL
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Hard to read exactly what you are asking. Take a breath, then make a list of what you would need help with or like to know.
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90 GT
GT40X B-cam, Systemax, PP 70mm TB,ProM-80@24#, 1.6rr/1.7rr, BBK LT & X-pipe, Magnaflow catback,
Walbro 255, Accufab fpr, UPR subs/uppers/lowers, Battle Boxes, Baer, Eibach, Ford truck 3.55 w/ Moser 31's
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RE: more power from a rebuild - 5/13/2008 1:20:38 PM
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grumpyphillips
Posts: 304
Joined: 1/23/2006
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An 8.8 is more than capable of withstanding 300-350 horses, so you shouldn't need a new one unless your current one is broken. If you have never installed gears before, I would suggest taking it to a shop and having it done. There are some special tools needed that are a bit pricey.
Remember with the GT40p heads you are also going to have to get different headers.
As far as I know you will need a fuel pump that is designed to work with a carb and not fuel injection. If I remember correctly, card fuel pumps usually have a much lower psi. Someone will correct me if I am wrong on that.
Along with removing your AC, you can remove the smog pump and power steering. You are going to need to run a short belt if you start removing accessories.
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1990 GT Convertible
FRPP 19 lb. High Flow Injectors
155 lph fuel pump Summit Racing (Walbro)
BBK CAI and BBK AFPR set at 45 psi
Granatelli 75mm MAF
MSD 6AL Box
Smog Pump deleted / 84.5" short belt
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RE: more power from a rebuild - 5/13/2008 7:30:47 PM
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joe_5.0
Posts: 68
Joined: 5/1/2008
From: oregon
Status: offline
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okay sorry for the jumbled list.im thinkin of rebuilding my engine and switchin to a carburated setup so that i can rip the emissions stuff out without worrying about screwing with the ecu.what i need to know is:
1.can my stock aod trans handle 300-350 horsepower?also, how much torque can it handle?
2.can i use my stock fuel pump and lines from a fuel injected 5.0 with a carburater? i know that carbs use lower psi fuel pumps but couldnt i solve that with a return line?also i want to know if the stock pump can work with a fuel cell?
3.the rebuild kit im lookin at would be probably be using a set of stock diameter flat top pistons and a hydraulic cam probably with a stock grind.i could also get the pistons in a .30 over diameter.it's called a budget rebuild kit in my doug herbert catalogue.would this kit up my power at all
4.would it be worth it to get a crankshaft that was lighter than my stock crank but had all the same diameters?
5.i want to get some gt-40p cylinder heads with some 1.6 or 1.7 rockers, bbk shorty headers and an edelbrock performer rpm 4 barrel intake.then use a 650 750 carb.would this be any good as far as performance?
6.im elimanating the computer and fuel injection so that i can rip off every peice of smog/emmisions crap from my engine and i dont have any clue how to get rid of the emissions stuff without messin with the computer.
im gonna hook some msd igniton on it too.will that engine be any better than my stock 89 5.0 i also wanna know if there would be any problems from hollowing out the catlytic converters in my exhaust?can any of you estimate the power id produce with a build like this?
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trying to be fast
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RE: more power from a rebuild - 5/13/2008 7:50:28 PM
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67mustang302
Posts: 5452
Joined: 4/21/2007
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My view is to not skimp on pistons and always get good forged slugs for a performance rebuild. Some nice rods with floating pins as well. The stock crank is fine and pretty light as stock units go, but for under $250 you can get a brand new cast steel unit that weighs less, but it's not really necessary. And with a setup like that you wouldn't need any more than about 550cfm worth of carb. Always run a hydraulic roller, there's no sense in limiting yourself with flat tappets, especially since the more modern oils and flat tappet cams do not get along much of the time.
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Who cares how much horsepower it has, all that matters is how fast it goes!
Best run 13.23 at 106.97mph with a 2.183 60'
Times from before tune and driver mod.
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RE: more power from a rebuild - 5/13/2008 7:53:38 PM
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PJC Racing
Posts: 551
Joined: 2/3/2008
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Your not going to make that power with those parts. You get what you pay for.
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89 LX Coupe: Factory 5.0, common performance and suspension bolt-ons (306 build inprogress)
86 GT: (current 1/4 project) will have primarily Team Z suspension and chassis additions, 408 with nitrous in the works
2003 Mach 1: programer, exhaust, 4.10'
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RE: more power from a rebuild - 5/13/2008 7:57:13 PM
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5spd GT
Posts: 732
Joined: 9/27/2007
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Do not expect a rebuild to give you a lot of power.
I gained zilch, going from a 163k bottomend, to a new 306.
Good Luck with what you can afford.
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RE: more power from a rebuild - 5/13/2008 8:03:42 PM
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joe_5.0
Posts: 68
Joined: 5/1/2008
From: oregon
Status: offline
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ok so basicly im askin what am i gonna make with a stock bottom end .30 over 302 and some gt40p heads with 1.6 rockers and a carburater after i remove all the smog equipment and ac and all the crap the motor doesnt need.what cams should i look at for a carburater setup.?
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trying to be fast
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RE: more power from a rebuild - 5/13/2008 11:17:10 PM
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PJC Racing
Posts: 551
Joined: 2/3/2008
Status: offline
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quote:
ORIGINAL: joe_5.0
ok so basicly im askin what am i gonna make with a stock bottom end .30 over 302 and some gt40p heads with 1.6 rockers and a carburater after i remove all the smog equipment and ac and all the crap the motor doesnt need.what cams should i look at for a carburater setup.?
Cam?
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89 LX Coupe: Factory 5.0, common performance and suspension bolt-ons (306 build inprogress)
86 GT: (current 1/4 project) will have primarily Team Z suspension and chassis additions, 408 with nitrous in the works
2003 Mach 1: programer, exhaust, 4.10'
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RE: more power from a rebuild - 5/14/2008 7:59:51 AM
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Pony 5.0
Posts: 244
Joined: 4/7/2007
From: Riverview, FL
Status: offline
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quote:
ORIGINAL: joe_5.0
okay sorry for the jumbled list.im thinkin of rebuilding my engine and switchin to a carburated setup so that i can rip the emissions stuff out without worrying about screwing with the ecu.what i need to know is:
1.can my stock aod trans handle 300-350 horsepower? Yes. also, how much torque can it handle? Don't know exactly
2.can i use my stock fuel pump and lines from a fuel injected 5.0 with a carburater? No. Way too much pressure.i know that carbs use lower psi fuel pumps but couldnt i solve that with a return line?also i want to know if the stock pump can work with a fuel cell? Don't know.
3.the rebuild kit im lookin at would be probably be using a set of stock diameter flat top pistons and a hydraulic cam probably with a stock grind Get a better cam if you want the power you are striving for.i could also get the pistons in a .30 over diameter.it's called a budget rebuild kit in my doug herbert catalogue.would this kit up my power at all. Very little if at all. Boring .30 over will help unshroud the valves a bit and help with breathing. I would go with a stroker if you were going to have it machined.
4.would it be worth it to get a crankshaft that was lighter than my stock crank but had all the same diameters? Stock crank will work with your power goals. Spend the money on better heads.
5.i want to get some gt-40p cylinder heads with some 1.6 or 1.7 rockers, bbk shorty headers and an edelbrock performer rpm 4 barrel intake.then use a 650 750 carb.would this be any good as far as performance? Might be too big on the carb selection. I would say a 600 cfm tops. A carb guy would know better.
6.im elimanating the computer and fuel injection so that i can rip off every peice of smog/emmisions crap from my engine and i dont have any clue how to get rid of the emissions stuff without messin with the computer.???
im gonna hook some msd igniton on it too.will that engine be any better than my stock 89 5.0 i also wanna know if there would be any problems from hollowing out the catlytic converters in my exhaust?can any of you estimate the power id produce with a build like this? In my opinion, you should be doing between 260-270 RWHP based on a carbed 306 with your mods.
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90 GT
GT40X B-cam, Systemax, PP 70mm TB,ProM-80@24#, 1.6rr/1.7rr, BBK LT & X-pipe, Magnaflow catback,
Walbro 255, Accufab fpr, UPR subs/uppers/lowers, Battle Boxes, Baer, Eibach, Ford truck 3.55 w/ Moser 31's
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RE: more power from a rebuild - 5/14/2008 8:10:40 AM
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sYckmYnded
Posts: 145
Joined: 5/5/2008
Status: offline
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ok for 1 there is not reason to go carb from efi, the efi is gonna make more power in your situation,
2 rebuilding a motor will always "wake it up" a lil bit
3 the stock crank is more then perfect for you since your not stroking
4 the aod sucks go to the junk yard and pick up a decent looking C-4 and rebuild it for $200 use a nice shift kit
5 removeing the smog pump will do nothing to you computer, also remove your ac pump and put a short belt on it
6 **** the cats pull them off, if you cant then take a peice of pipe and hammer it down into the cat, makes it flow through but looks like the cat is there.
7 make sure you get a msd 6a box and your stock dist. is fine just use a msd cap rotor and wire set with a new blaster coil.
8 3:73 is perfect and the 8.8 rear will do you wonders
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1990 Mustang LX
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