LT 1 suggestions - Team Camaro Tech
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post #1 of 8 (permalink) Old Sep 5th, 04, 07:45 PM Thread Starter
 
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I have a 68 with a 95 LT1. Mileage on the motor is 53k. I want to do some minor mods to it without having to do major changes. I would like to put in biger injectors and a different manifold. will I have to do any other changes? It runs real strong so I don't want to change too much. Any suggestions?
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post #2 of 8 (permalink) Old Sep 6th, 04, 05:48 AM
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That is probably not where I would start if you're looking for a performance increase. The bigger injectors will net you no performance; only need to do that if you add enough power to exceed the amount of fuel they can supply. I made 458 HP on the stock injectors.

The manifold is a nice setup and again theres not anything to give you a performance increase out there. Keep the stock unit.

I'd start with headers and a decent exhaust. Make sure you have a low-restriction air filter system. Computer reprogramming can pick up some power too. After that you'll be looking to go inside the engine. A cam swap is a very noticeable power gain, as well as ported heads. At this point a larger throttle body would likely help. Doing those three with the exhaust and computer mods should get you 400+ HP.

Don't know what your budget is, and how far you want to go with the engine, but that's probably the order I'd go in. Oh, there's also nitrous, but that is the reason I ended up with a 458 HP 383 LT1! Definitely broke the stock engine with the mild street legal NOS nitrous kit.

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post #3 of 8 (permalink) Old Sep 7th, 04, 09:58 PM Thread Starter
 
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well looks like I will have to start with the cam then. I have 2 inch headers with three in flowmaster dual exhaust. I will look into the chip too. The engine was professionally installed so I don't want to jack with it off the bat. Thanks for the info. Any recommendations on throttle body?
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post #4 of 8 (permalink) Old Sep 8th, 04, 05:01 AM
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Several companies offer the 58 mm throttle bodies which will move more air. Not a lot of bang for the buck with just a cam swap, but a part of the overall package. With head porting it becomes more necessary.

I bought mine from http://www.tpis.com/

Jody


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post #5 of 8 (permalink) Old Sep 8th, 04, 06:42 AM
 
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sgtagr:

You will probably want to check out a forum with cars predominantly powered by LT1s such as the Impala SS Forum at http://www.impalassforum.com or one of the newer Camaro forums.

I know the Impala SS Forum has a section dedicated to performance upgrades.
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post #6 of 8 (permalink) Old Sep 8th, 04, 09:48 AM
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when considering the throttle body swap, take into consideration that the Ramjet 502 uses the same throttle obdy as a stock LT1, and they put out over 500 horses. a small block making 500 horses moves the same amount of air as a big block making 500 horses, so the stock throttle body should definiteley be good enough for what you are doing. anything you can do to get more filtered air to the throttle body will help a lot- on my LT1 powered 94 Caprice, just hacking a bunch of holes in the stock air box made a very noticable difference in the way the car ran.
and why, exactly, do you have 2" primary headers? that's healthy big block territory there.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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post #7 of 8 (permalink) Old Sep 8th, 04, 07:40 PM Thread Starter
 
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that is how I bought the car. The previous owner had them put on. I really want to thank every one for the suggestions, THis is the first time I have ever had such hi-tech stuff in an old classic. (68 GTO) was my first. I don't have the smarts for this engine yet but I figure with guys out here I could learn a thing or two. would it be a good idea to install smaller pullies?
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post #8 of 8 (permalink) Old Sep 9th, 04, 08:52 AM
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stay away from pulley swaps- all they do is cause charging problems.

you don't plan sincerity.
you have to make it up on the spot.

wanna hear about 20 years ago when i was too smart to know any better?
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