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Old 01-26-2012, 12:20 PM   #1
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turbo supercharger or bottle.

Ok I need your help guys. I got a 1990 5.0 coupe. Here's the thing I want to stay with the same size 302 block, instead of a bore kit.. I'm stuck between Turbo Nos and Supercharger. This is my daily/track car its proven reliable. I have as it stands now intake headers exhaust, e303 cams, and the engine was rebuilt with OEM forged parts. I got 3.73 gears n I'm probably missing more things but I just can't think right now. I always wanted to go Turbo but i heard there's always something going on, same for supercharger, hoses belts etc.. and I was planning Nos but on the 302 it won't be the same as the 331 or more bore. Need help opinions please and thank you.
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Old 01-26-2012, 07:31 PM   #2
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Quote:
Originally Posted by alex_chab
Ok I need your help guys. I got a 1990 5.0 coupe. Here's the thing I want to stay with the same size 302 block, instead of a bore kit.. I'm stuck between Turbo Nos and Supercharger. This is my daily/track car its proven reliable. I have as it stands now intake headers exhaust, e303 cams, and the engine was rebuilt with OEM forged parts. I got 3.73 gears n I'm probably missing more things but I just can't think right now. I always wanted to go Turbo but i heard there's always something going on, same for supercharger, hoses belts etc.. and I was planning Nos but on the 302 it won't be the same as the 331 or more bore. Need help opinions please and thank you.
I would do NOS but at the same time u have a decent cam for boost applications also
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Old 01-26-2012, 09:52 PM   #3
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But how would fuel be?? I heard it isn't as bad as u think asking as you don't hop on it all day but with that power it'll be hard to resist. And thanks for replying
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Old 01-27-2012, 01:04 AM   #4
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Re: turbo supercharger or bottle.

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Originally Posted by alex_chab View Post
Ok I need your help guys. I got a 1990 5.0 coupe. Here's the thing I want to stay with the same size 302 block, instead of a bore kit.. I'm stuck between Turbo Nos and Supercharger. This is my daily/track car its proven reliable. I have as it stands now intake headers exhaust, e303 cams, and the engine was rebuilt with OEM forged parts. I got 3.73 gears n I'm probably missing more things but I just can't think right now. I always wanted to go Turbo but i heard there's always something going on, same for supercharger, hoses belts etc.. and I was planning Nos but on the 302 it won't be the same as the 331 or more bore. Need help opinions please and thank you.
I have recently added more information to the Superchargers & Turbos sticky thread that may be of interest to you.


I would favor turbocharging over supercharging or nitrous for the simple fact that it is "easier" on the engine and will develop more power than and has less "parasitic power loss" than a supercharger. I don't like nitrous, simply because of the hassles involved in filling and warming bottles all the time.
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Old 01-27-2012, 05:57 PM   #5
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But how would fuel be?? I heard it isn't as bad as u think asking as you don't hop on it all day but with that power it'll be hard to resist. And thanks for replying
I would at least step on ur fuel pump. #24 lb injectors would be nice also
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Old 01-27-2012, 06:04 PM   #6
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I say turbocharge its easier on the motor and when ever you want the power just get it to it! And the gas milage is not bad. I have a 86' mustang 5.0 stock with a turbocharge and it runs good!
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Old 01-27-2012, 06:35 PM   #7
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I say turbocharge its easier on the motor and when ever you want the power just get it to it! And the gas milage is not bad. I have a 86' mustang 5.0 stock with a turbocharge and it runs good!
What kind of quarter miles times u turning in? Just wondering
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Old 01-27-2012, 07:24 PM   #8
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I haven't been to the track yet. The track are close around my area cuz its winter. But take a look at my pic I put up or my video on YouTube "lh32186"
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Old 01-28-2012, 03:44 PM   #9
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Thanks everyone for your help I appreciate it, I'm gonna go Turbo on low boost till I get another daily, income tax comes in in a few days hopefully by march it'll be running (;
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Old 01-28-2012, 05:09 PM   #10
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@Alex look up on3 performance that's what I'm running and it's working out for me. I had the kit for a year already and no problems at all.
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Old 01-28-2012, 08:09 PM   #11
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How much do they run for?
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Old 01-28-2012, 08:28 PM   #12
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The kit is 1560. But keep in mind there is lots of other things that need to be done to support this kit.
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Old 01-28-2012, 09:19 PM   #13
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Alright and yeah I know but that's not a bad price how much psi your fox holding??
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Old 01-30-2012, 09:57 AM   #14
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I end up paying like $2400 for my kit, but that's everything you need. I never ran the motor with stock head gasket and stock studs so idk how much psi it would hold. And I send my heads out to make sure they good. The total came out almost $3000.
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Old 01-30-2012, 02:45 PM   #15
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Re: turbo supercharger or bottle.

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Originally Posted by Lh3211986 View Post
I end up paying like $2400 for my kit, but that's everything you need. I never ran the motor with stock head gasket and stock studs so idk how much psi it would hold. And I send my heads out to make sure they good. The total came out almost $3000.
I'm a little interested in the On 3 kits, could you share some info?
How much boost are you running?
Have you had it on a dyno yet?
How are you tuning it?
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Old 01-30-2012, 02:49 PM   #16
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Can't wait to do my turbo!! I Jus got some forged pistons for $70. Only thing next is heads and other misc and if course buy my turbo kit
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Old 01-30-2012, 03:42 PM   #17
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For me the kit is good. They sell a burn chip that clips in to the back of the computer. I'm using the A9L stock computer. The chip tells the computer what size of injectors you have and that is a 5 speed, the chip does a good job and it's only $180 after tax $201. As tuning goes its easy I got my timing set at 10 degrees and you bring the fuel pressure until the and get the A/F mixture current. No dyno yet and I'm running 8psi.

---------- Post added at 03:42 PM ---------- Previous post was at 03:39 PM ----------

And it's all stock top end and bottom end and I ran the car at 15psi and it was out! But idk how much HP it have. They say don't go over 550hp with a stock 302.
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Old 01-30-2012, 04:25 PM   #18
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Re: turbo supercharger or bottle.

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Originally Posted by Lh3211986 View Post
For me the kit is good. They sell a burn chip that clips in to the back of the computer. I'm using the A9L stock computer. The chip tells the computer what size of injectors you have and that is a 5 speed, the chip does a good job and it's only $180 after tax $201. As tuning goes its easy I got my timing set at 10 degrees and you bring the fuel pressure until the and get the A/F mixture current. No dyno yet and I'm running 8psi.

---------- Post added at 03:42 PM ---------- Previous post was at 03:39 PM ----------

And it's all stock top end and bottom end and I ran the car at 15psi and it was out! But idk how much HP it have. They say don't go over 550hp with a stock 302.
I didn't see the chip when I checked them out, I'll have to look again.
I suppose the chip handles the timing ****** to keep it from detonating.


See my sticky post in this forum called Superchargers & Turbos.
I have amassed quite a bit of information on using forced induction on a stock block and there are some pointers and links in there with information that will help you keep your engine alive at 500+ HP levels.


I'm going to be shooting for 600+ with mine, mainly as an experiment to see how far I can go and how much it will actually hold. If it fails I'm going for a 351W or a Boss 302 block.
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Old 01-30-2012, 05:33 PM   #19
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Quote:
Originally Posted by Trojan Horse

I didn't see the chip when I checked them out, I'll have to look again.
I suppose the chip handles the timing ****** to keep it from detonating.

See my sticky post in this forum called Superchargers & Turbos.
I have amassed quite a bit of information on using forced induction on a stock block and there are some pointers and links in there with information that will help you keep your engine alive at 500+ HP levels.

I'm going to be shooting for 600+ with mine, mainly as an experiment to see how far I can go and how much it will actually hold. If it fails I'm going for a 351W or a Boss 302 block.
Yeah I'm lookin for 500 after my turbo...I got a freind who is a Ford tech and he said u can get the "block balanced" to help the 302 hold to bout 600 or something I've never heard of that have yall?
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Old 01-30-2012, 05:35 PM   #20
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Yea, my next block is going to be 351W, this guy I know he got a 351w turbo it's all done up, and he's making 853hp at the wheels😱
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Old 01-30-2012, 06:51 PM   #21
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I heard of that before but ford tuners keep telling me that the 302 block can't hold over 550hp cuz the motor could brake in half!
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Old 01-30-2012, 07:29 PM   #22
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Re: turbo supercharger or bottle.

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Yeah I'm lookin for 500 after my turbo...I got a freind who is a Ford tech and he said u can get the "block balanced" to help the 302 hold to bout 600 or something I've never heard of that have yall?
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Originally Posted by Lh3211986 View Post
Yea, my next block is going to be 351W, this guy I know he got a 351w turbo it's all done up, and he's making 853hp at the wheels
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Originally Posted by Lh3211986 View Post
I heard of that before but ford tuners keep telling me that the 302 block can't hold over 550hp cuz the motor could brake in half!
Sorry, but there is no such thing as "balancing" the block.
You balance the rotating assembly to help reduce "harmonics" which are harmful vibrations imparted into the block by an out of balance rotating assembly.
Balancing smooths out the rotation of the internal parts and recoups some of the horsepower lost through unwanted vibration/harmonics.
Balancing won't do a whole lot toward keeping you from splitting the block in half, but it is very desirable for the reasons listed above.


The 5.0/302 blocks and their smaller siblings are of a "thin wall" casting design. While that is desirable to cut down on weight, it doesn't leave sufficient material to support HP levels of over 400-500 HP.
The blocks split apart from the twisting and distortion of the thin wall block caused by increased HP and/or detonation. The increased cylinder pressures and rotating forces just literally tear the block apart.


To help the stock 5.0/302 blocks hold over 500 HP, companies like DSS and Valley Girdle Pro have developed block strengthening aids to bolt into and onto the blocks.
The DSS Main Support System consists of a main stud girdle, new main studs and a windage tray. The main girdle and windage tray are made from aluminum which also helps to dampen unwanted harmonics and vibrations. DSS claims their Main Support System will help the stock block support up to 650 HP.


The Valley Girdle Pro attaches into the lifter valley of the block and bridges across the center to help hold the block together from the top end. I believe that using these two supports together will help keep your engine together at HP levels of 600+ HP as long as you keep it properly tuned (I.E. NO detonation allowed!) and do not pound on the engine mercilessly. Remember, detonation is an engine killer and at the first hint of pinging and rattling you should get out of the gas and check your timing and tune.


You can find more information and links to those two supports in my Superchargers and Turbos sticky thread.


Even the best factory 351W block will be hard pressed to support 800+ HP for very long or reliably. The addition of the Main Support System and Valley Girdle Pro will greatly improve block strength and reliability on the 351W too.


To ensure reliability and strength the strongest and best choice is to either use a Ford Boss 302/351w block, which are capable of supporting up to 1500 HP, or go with a Dart or other aftermarket block that is designed to support mega HP levels.


I favor the Ford Boss blocks for the simple reason that they cost less than other aftermarket blocks and you can add the main and valley supports to them too for even more strength. The Boss 302 runs around $1600 and the Boss 351W around $1900.
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Old 01-30-2012, 08:26 PM   #23
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Thanks that's good info
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Old 01-30-2012, 08:56 PM   #24
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Re: turbo supercharger or bottle.

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Thanks that's good info
Thank you, we do our best.
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Old 01-31-2012, 06:56 AM   #25
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If you got the money get pro charger
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Old 01-31-2012, 07:59 AM   #26
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Thank you guys for the info instead of turbo first I'm gonna do a swap. What I'm gonna do is go for a 1999-2002 cobra engine. Its a 4valve 4.6. One of my boys has it on his 99 gt with a hellion pushing 18 psi and 100shot. Stock internals. Tuned by Willy Idk if u guys know him. But I'm gonna save up for that engine and boost that. Without spray he dyno at 560 at wheel in 12psi. Since he changed the spring and put the 100shot hasn't dyno but ill post up those numbers
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Old 01-31-2012, 09:59 AM   #27
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Quote:
Originally Posted by alex_chab
Thank you guys for the info instead of turbo first I'm gonna do a swap. What I'm gonna do is go for a 1999-2002 cobra engine. Its a 4valve 4.6. One of my boys has it on his 99 gt with a hellion pushing 18 psi and 100shot. Stock internals. Tuned by Willy Idk if u guys know him. But I'm gonna save up for that engine and boost that. Without spray he dyno at 560 at wheel in 12psi. Since he changed the spring and put the 100shot hasn't dyno but ill post up those numbers
Awsome...willys a great tuner
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