Help choosing intake manifold

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Oct 28, 2008 | 08:04 PM

#31

juice90

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axle code "19" so guess thats 3:55 gears running 31 inch tires and I do not want to go to taller ones... and swapping 2 sets of gears out is a PIA so hence why I figured the cam/ spacer idea Also have an AOD trans

Oct 28, 2008 | 08:58 PM

#32

LxMan1

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From: Louisville,Ky.

3.55 open is not near enough for 31" tall tires and od.

Oct 28, 2008 | 09:35 PM

#33

juice90

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3.55 open not enough????? I don't understand?

Oct 28, 2008 | 10:43 PM

#34

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by peckhamjusten

Since you mentioned gearing, I have 3.55's and am looking at getting 295/50' wich are 26" tall.

my other question bout gearing is what would be more suited for my application here?

26" tires will increase you final drive ratio to approx 3.82 so it's the same as adding gears, this will help performance with the 302.

Oct 28, 2008 | 10:56 PM

#35

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by juice90

A cam upgrade will help but the spacer won't make a noticable difference. Here's some insight from somebody that has had both a 5.0 and 5.8 in the same truck. A 5.8 is just capable of producing acceleration in OD in a truck with 3.55 gears and 31" tires, and it makes about 100 ft/lbs more TQ than a 5.0 below 2000rpm. There's nothing you can do to the 5.0 to make that much low rpm TQ so you have to regear to put the motor in a range where it makes enough TQ.

Oct 29, 2008 | 02:24 AM

#36

LxMan1

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From: Louisville,Ky.

Quote:

Originally Posted by juice90

3.55 open not enough????? I don't understand?

Sorry, 19 means an open 3.55, not LS.

I run a 26.1" tall tire 265/50R15 on my Mustang . 295/50R15's are 26.7". The 3.55's work good with my T-5, but most AOD Mustang guys run at least 3.73 if not 4.10. This would also be my choice in a heavy truck, 4.10's.

Oct 29, 2008 | 06:21 AM

#37

juice90

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well, I am pretty happy with the overall performance of what I have.. mileage is in the 17 to 19 mpg. pull power is decent nuff for what I tow, and anything smaller than 31 inch looks stupid on the truck anyways..lol.

Just figured i'd see if it was possible to move the tq numbers around a lil bit is all. I think more than anything prob the the shorties, dual exhaust and an ignition upgrade will help things along. thanks.

Oct 29, 2008 | 08:19 AM

#38

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by juice90

well, I am pretty happy with the overall performance of what I have.. anything smaller than 31 inch looks stupid on the truck anyways..

Agreed on the tire size.. it's what looks about correct for a vehicle this big.

Quote:

Originally Posted by juice90

Just figured i'd see if it was possible to move the tq numbers around a lil bit is all. I think more than anything prob the the shorties, dual exhaust and an ignition upgrade will help things along. thanks.

You can make significant improvements in power and you'll probably be quite satisfied. You'll want longtube headers though shorties won't do anything for you at low rpms, and a cam upgrade is the key, it will let more air in and that will make more TQ. The 5.0 in my truck now does perform a lot better than stock.. it's just noticably weaker than the 5.8 I took out, if you have never had that you won't miss it.