LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Pacsetter Longtubes "Race" Version... Do I need a tune?

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Old Nov 2, 2010 | 12:00 AM
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Default Pacsetter Longtubes "Race" Version... Do I need a tune?

I am thinking of buying a set of Pacesetter Longtubes "Race Version" with no AIR or EGR fittings... Will i need a tune after install since I am deleting the AIR and EGR???
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Old Nov 2, 2010 | 12:29 AM
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I am running the coated pacesetter race long tubes i havent got a tune yet runs fine. Only thing i did was replace my LT1 KM with a LT4 KM. If the dash light bothers you then you can get the EGR deleted.

I saved my LT1 KM for later date when it might come in handy.
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Old Nov 2, 2010 | 12:51 AM
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Originally Posted by LT1
I am running the coated pacesetter race long tubes i havent got a tune yet runs fine. Only thing i did was replace my LT1 KM with a LT4 KM. If the dash light bothers you then you can get the EGR deleted.

I saved my LT1 KM for later date when it might come in handy.
What does the kncok module do exactly?
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Old Nov 2, 2010 | 12:53 AM
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Limit the amount of timing being pulled
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Old Nov 2, 2010 | 01:20 AM
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Originally Posted by LT1
Limit the amount of timing being pulled
Gotcha. The "race" version add more power?
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Old Nov 2, 2010 | 01:21 AM
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No, they just look cleaner! and much easier to install
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Old Nov 2, 2010 | 01:28 AM
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Originally Posted by LT1
No, they just look cleaner! and much easier to install
Easier, to install?!!?! Did you do yours, yourself? if so, how long did it take?
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Old Nov 2, 2010 | 01:38 AM
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Yeah easier to install race LT's over the emission because of the clearance issues. An yes i replaced them myself, i was able to use a lift at the time and took me 2 hours. I'm sure if you were doing it in a drive way would probly take longer.

There's lot of things needs to be taken off to get it done. Remove starter, oil dipstick tube, steering linkage, unbolt motor mount, remove exhaust manifolds, spark plug, wires, and coolant temp gauge sensor on the side of the head. Raise the engine up just enough to clear the long tubes, i installed both from under.

Be sure to order all the stuff before starting this job makes the job go quicker instead of running back and forth ordering parts such as O2 extensions, camps, header bolts, new gaskets ect...

Last edited by LT1; Nov 2, 2010 at 01:45 AM.
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Old Nov 2, 2010 | 01:47 AM
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Originally Posted by LT1
Yeah easier to install race LT's over the emission because of the clearance issues. An yes i replaced them myself, i was able to use a lift at the time and took me 2 hours. I'm sure if you were doing it in a drive way would probly take longer.

There's lot of things needs to be taken off to get it done. Remove starter, oil dipstick tube, steering linkage, unbolt motor mount, remove exhaust manifolds, spark plug, wires, and coolant temp gauge sensor on the side of the head. Raise the engine up just enough to clear the long tubes, i installed both from under.

Be sure to order all the stuff before starting this job makes the job go quicker instead of running back and forth ordering parts such as O2 extensions, camps, header bolts, new gaskets ect...
So thats pretty much how to do it?
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Old Nov 2, 2010 | 01:49 AM
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Correct, It also depends on each car not all our fbody's are exactly the same you might fight tryin to put in long tubes more than someone else. For the most part thats pretty much it.

Its good time to replace engine mounts while your under there.
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Old Nov 2, 2010 | 02:00 AM
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Originally Posted by LT1
Correct, It also depends on each car not all our fbody's are exactly the same you might fight tryin to put in long tubes more than someone else. For the most part thats pretty much it.

Its good time to replace engine mounts while your under there.
Gotcha. Do you think 480 is bad price for install?
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Old Nov 2, 2010 | 02:57 AM
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Maybe someone can chime in and let you know about the price.

I wouldn't know because i do all the work myself. If you want to know my opinion i say do it yourself, i wouldn't ever recommend someone to pay money to have it installed. Maybe get couple friends and do it over the weekend and by them some beer.
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Old Nov 2, 2010 | 03:12 AM
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Originally Posted by LT1
Maybe someone can chime in and let you know about the price.

I wouldn't know because i do all the work myself. If you want to know my opinion i say do it yourself, i wouldn't ever recommend someone to pay money to have it installed. Maybe get couple friends and do it over the weekend and by them some beer.
Im 18, so i cant buy, but i can always get some

Question: on a stock motor, prob gonna be a bolt on car with a small tune... will Lt's make that big of a difference than Shorties??? On a Built motor of course, but what bout stock?
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Old Nov 2, 2010 | 03:17 AM
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On a stock LT1 long tubes will make more power than shortie headers.

I would guess somewhere around 15-20rwhp with long tubes
and about 10-14rwhp with shorties.
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Old Nov 2, 2010 | 03:26 AM
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Originally Posted by LT1
On a stock LT1 long tubes will make more power than shortie headers.

I would guess somewhere around 15-20rwhp with long tubes
and about 10-14rwhp with shorties.
So only about a 5rwhp difference?
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Old Nov 2, 2010 | 03:41 AM
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i would "guess" about 5-10rwhp more depending on some factors like dyno, weather, tune, intake.
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Old Nov 2, 2010 | 07:32 AM
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long tubes will absolutly make more power and torque than shorties........shorties are virtually useless........long tubes will make a good difference on your car......and I would reccomend a tune afterwords....i've see these cars sometimes stay right around the 12's AFR and I've seen them sometimes dip down into the 10's at WOT.....
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Old Nov 2, 2010 | 07:22 PM
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To do a header swap your looking at 3-4 hours with quite a few busted up knuckles! I would do it myself if i were you, as you can't buy experience.

And definitely go with a set of longtubes! For the amount of work involved in doing any header swap you will regret it if you went with the shorties. Also the long tubes will give you a better platform to grow on with future mods.
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Old Nov 3, 2010 | 04:14 AM
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Took me a lot longer than 3-4 hours! Of course I tend to do my car projects in my garage during the winter which makes them go a little slower.

I would plan the whole weekend if I were you. A key point is to get the front end lifted REALLY high to get those headers in from below since you need to angle them up so far. Make sure to check your header bolt torque frequently for the first ~two weeks after the install.

No need for a tune although it will get you a little more power. And yes, LTs are totally worth it! They make a very noticeable difference.

If you decide to pay to have it done, $480 sounds about right. I would do it yourself though. Car projects can get frustrating, but there is nothing better than knowing your car inside and out, and knowing that a job was done right. Both of these only come from you being the one turning the wrenches.
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Old Nov 3, 2010 | 06:13 AM
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I notice you're from MD. If you're in the NE part of the state, I can install them for you for a better price (West Chester, PA). PM me if you're interested.
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