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Old 10-11-2011, 08:08 PM   #1
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90-93 5.0 Questions...

Hey guys, I'm brand new here and have a couple quick questions.

I'm looking for a 90-93 mustang, LX Notch, 5.0L -5 speed. This is strictly going to be a weekend/fun car. I more recently parted ways with my daily driver (2009 G8-GT 6.0L V8, Rotofab intake, VMS stage2 tune, DT long tubes & SOLO Cat-back... good for 12.6's)....in favour of having a fuel efficient daily driver (2011 Mazda6) and a toy on the side (Hopefully a Foxbody!)

I'm curious to know what these cars are capable of without a ton of money. I know stock they will run around a 14.8-15.1.... my friend had a 91 GT with GT40 heads/intake, headers, exhaust, pulleys and 3.73's and went 14.5's...

I'm curious what I'll be looking at if i throw in a FRPP 306, with GT40 heads and intake (if thats applicable) with headers and exhaust.... 3.73's.... compared to the stock 302, with AFR 165 heads, Holley intake, again headers/exhaust and 3.73's....

I would like a low-low 13-second car.... without dumping a ton of $$$ into the engine....if not faster, while keeping the exterior looking like day one! Completely original.

Let me know (flame suit on, and no hating on the G8, it was a fun car) My budget is about $7k for the car... I want something pretty mint and unmolested, and then about $5k to make it go..i'll budget more if the FRPP 306 is the way to go.
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Old 10-11-2011, 08:28 PM   #2
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Quote:
Originally Posted by Roddy
Hey guys, I'm brand new here and have a couple quick questions.

I'm looking for a 90-93 mustang, LX Notch, 5.0L -5 speed. This is strictly going to be a weekend/fun car. I more recently parted ways with my daily driver (2009 G8-GT 6.0L V8, Rotofab intake, VMS stage2 tune, DT long tubes & SOLO Cat-back... good for 12.6's)....in favour of having a fuel efficient daily drive and a toy on the side (Hopefully a Foxbody!)

I'm curious to know what these cars are capable of without a ton of money. I know stock they will run around a 14.8-15.1.... my friend had a 91 GT with GT40 heads/intake, headers, exhaust, pulleys and 3.73's and went 14.5's...

I'm curious what I'll be looking at if i throw in a FRPP 306, with GT40 heads and intake (if thats applicable) with headers and exhaust.... 3.73's.... compared to the stock 302, with AFR 165 heads, Holley intake, again headers/exhaust and 3.73's....

I would like a low-low 13-second car.... without dumping a ton of $$$ into the engine....if not faster, while keeping the exterior looking like day one! Completely original.

Let me know (flame suit on, and no hating on the G8, it was a fun car) My budget is about $7k for the car... I want something pretty mint and unmolested, and then about $5k to make it go..i'll budget more if the FRPP 306 is the way to go.
Welcome aboard. A friend of mine went 13.60's with an e303 cam stock e7 heads, header back exhaust with 4.10 gears. Hit low 11's with a 125 shot of nitrous ( not recommended on stock block).

The frpp 306 should get you in the 13's with 3.73. If you ever plan on forced induction you will want the forged 306 they offer.

I personally like the g8s. I have seen a couple high horsepower g8s that put a lot of muscle cars to shame. I doubt a fox is going to be more fuel efficient.
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Old 10-11-2011, 09:21 PM   #3
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Re: 90-93 5.0 Questions...

Your friend's car should have been a bit quicker than it was.
There are HCI kits that will net you 350 hp at the crankshaft.
That a CAI and headers/exhaust should be sufficient to put you easily past your goal.
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Old 10-11-2011, 11:38 PM   #4
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Re: 90-93 5.0 Questions...

^^^ Excellent. There is a local guy selling his 92' it has the AFR 165 heads, crane roller rockers, comp cam, holley systemax intake, headers+exhaust with a dyno sheet showing 299rwhp..... i thought that was decent but a bit low for the the mods, and with an $11,000 asking price....not so interested.

Is there a link to these HCI kits? is this something offered by JEG's? Summit? FRPP? im really interested to see.

Less than low 13's would feel slow for me...
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Old 10-11-2011, 11:44 PM   #5
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Quote:
Originally Posted by Roddy
^^^ Excellent. There is a local guy selling his 92' it has the AFR 165 heads, crane roller rockers, comp cam, holley systemax intake, headers+exhaust with a dyno sheet showing 299rwhp..... i thought that was decent but a bit low for the the mods, and with an $11,000 asking price....not so interested.

Is there a link to these HCI kits? is this something offered by JEG's? Summit? FRPP? im really interested to see.

Less than low 13's would feel slow for me...
I've heard trickflow has a twisted wedge Topend kit good for about 350hp... I'd look for that. Not sure on what site, latemodelrestoration I think?
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Old 10-12-2011, 12:57 AM   #6
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If the car has less then 50k miles that he can prove, with no mods 11k wouldn't be bad. Contrary to popular belief mods hurt the value of a car, truck, or bike as most people don't want to purchase another mans problem child, and want to mod to their liking. When I bought my 79k mile 95 GT, I haggled over the few mods it had and acted like I'd as soon walk away. Borrowed $5300 bucks for my car.
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Old 10-12-2011, 07:52 AM   #7
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Re: 90-93 5.0 Questions...

Quote:
Originally Posted by Roddy View Post
^^^ Excellent. There is a local guy selling his 92' it has the AFR 165 heads, crane roller rockers, comp cam, holley systemax intake, headers+exhaust with a dyno sheet showing 299rwhp..... i thought that was decent but a bit low for the the mods, and with an $11,000 asking price....not so interested.

Is there a link to these HCI kits? is this something offered by JEG's? Summit? FRPP? im really interested to see.

Less than low 13's would feel slow for me...
Here's a link to the LRS Trick Flow Packages.

Trick Flow HCI Kits
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Old 10-12-2011, 06:50 PM   #8
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Re: 90-93 5.0 Questions...

Do most guys just bolt up an HCI kit or is a rebuild on the bottom end recommended? Rings etc? I recall being told that if I put rebuilt heads on a older engine it would cause the engine to burn oil...... Let me know if im out to lunch on this one

Also does the 5.0 come with some kind of header from factory?
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Old 10-12-2011, 06:56 PM   #9
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If you have high miles then yes a full rebuild would be a good idea.you can do a compression test to see how healthy your motor is.even if you put the top end on and need a rebuild later you can still use your new parts.
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Old 10-12-2011, 06:58 PM   #10
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Quote:
Originally Posted by Roddy
Do most guys just bolt up an HCI kit or is a rebuild on the bottom end recommended? Rings etc? I recall being told that if I put rebuilt heads on a older engine it would cause the engine to burn oil...... Let me know if im out to lunch on this one

Also does the 5.0 come with some kind of header from factory?
Yes the factory 5.0 in the foxbody comes with factory headers but the only thing they are good for is scrap money heh.
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Old 10-12-2011, 08:17 PM   #11
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Originally Posted by 90mustangLX

Yes the factory 5.0 in the foxbody comes with factory headers but the only thing they are good for is scrap money heh.
+1
they look like headers but are more like cast iron manifolds in function. Lol
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Old 10-12-2011, 08:40 PM   #12
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Re: 90-93 5.0 Questions...

Quote:
Originally Posted by Roddy View Post
Do most guys just bolt up an HCI kit or is a rebuild on the bottom end recommended? Rings etc? I recall being told that if I put rebuilt heads on a older engine it would cause the engine to burn oil...... Let me know if im out to lunch on this one

Also does the 5.0 come with some kind of header from factory?
Like dreamstang said, do a compression test to see what kind of shape the engine is in.
If the rings are still sealed up good then you shouldn't have any problems.
If you "tighten up" (rebuild or replace) the top end on an engine that has worn out rings and it is not sealing up good to begin with, then yes it may cause it to burn more oil. This is because the tighter top end is keeping more of the compression in the cylinder causing higher cylinder pressures which lets more oil past the worn out rings.
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