hey guys new to forum, my ? is im a retired USMC mechanic and have never messed with lt1's before my boss has a 1996 ram air bird, he started to port heads and got meat between intake runners about a 16th of an inch [ya its sucks] he wants to run a 250 shot and bottom end is all forged and sitting on stand, he is looking for a good set of heads and intake,it has new accel 40lbs injectors,and bbk throttle body, you guys have any suggestions? thanks for help......

 

40lbs injectors are overkill unless trying some sort of dry kit which seems unlikely with a 250hp shot.
With an LT1 intake a 250hp shot should be direct port.

Properly ported LT1 heads with a 200 shot should put a f-body into the 9s. Guessing your boss is clueless as to just what kind of performance a good LT1 with 250shot can provide. There is one guy with ported LT1 heads on a stock short block with a carb in a third gen running mid 9s on I think 175-200hp shot. Another guy with the same ported LT1 heads on a stock short block Impala runs 10.4 on a 75 shot.

If he wants a catalog answer trick flow heads let the pistons in the engine now help dictate which Trickflow head, you want at least 11.5:1 compression, LT1s can go higher even on pump gas but this should be rock bottom minimum for a built LT1. Far as intake,the stock one is not perfect but hard and expensive to beat, the only Bolton aftermarket is Edelcrap, don't even consider it for a second, their heads and intake for the LT1 are a bad joke making less flywheel hp than a ported stock heads setup is expected to make at the tire.

 

1/16" wide...even if they do wind up sealing to the intake manifold....that is to thin OMHO.

if the port job was "home done" by someone that just happens to own a air tool with some grinding bits...not the way to do it.

maybe a pic would show otherwise.

places like Lloyd Elliott Portworks or Advanced Induction would be better to get/discuss heads...and even a matched cam for a nitrous build

 

Chronic DIY'er here so dont want to sound like a hypocrite to start
From the sounds of what he did those heads....sell em off or toss em out
Big gaping hole wow..stick it on the bench see what happens
Who knows what his intentions were so its hard to armchair and be critical I guess


I have not messed with their intake yet but the heads....considering who is designing some of the ports the Id expect a little more guy is pretty prominent in the industry. Id guess the intake is simply "we have a replacement with the air gap" thing being as there are none for the LTx
See many putting them down whats so bad about them? A good single plane cost money too.

 

I have always been a fan of Dart Pro 1 Heads. Should handle LOTS of nitrous.
I would recommend a direct port setup for the nitrous though.
Just use the stock intake.

 

The complete edelbrock LT4 package makes 406fwhp according to their own marketing department. The GM stuff makes 425fwhp in a perfect world and guys expect 400+RWhp when having gm heads and intake ported by the popular porters some guys managing 420+RWhp on stock shortblocks through automatics which is a HUGE amount more.

The intake was halfassed when the GM LT4 intake was discontinued and everyone was clambering for something, the magazine testing suggests the edelbrock intake might possibly HURT power a little. The GM LT4 intake is internally an LT1 intake anyway.

One of the magazines did the Edelcrap kit plus NITROUS on a Caprice and it ran the same as my car did, on my old 190cc heads 226/234 .565/.565 cam full weight on street tires with the slicks and tools in the trunk.
I suspect they just recycled emissions legal gen 1 ports and stock the LT1 was such an upgrade from earlier 23degree that the end result is their LT1 stuff was a joke.

 

The ltx never got the aftermarket backing from the big name guys it really needed to shine...head wise. I wish more machine shops would do the sbc head conversion. Just too little money in it.

 

Maybe because they were severely limited with manifold height, due to the low hoodlines of the Camaro/Firebirds and Corvettes....

 

we decided to go with Afr 200cc cnc heads and a good extrude honed intake, I know Afr is good stuff i have had a set on 540 BBC, but how good is fast, and this motor has 11:3 comp ratio and a big nos cam, we are going to order a set to match bottom end specs....... Its running a 4l60 with big converter what do all of you think, can always use advice!

 

Why would you even consider an extrude hone intake?
What size chamber is the 11.3:1 compression based on? That is too low.
If you want to do aftermarket most diehard AFR fans will even tell you the small AFR stuff is not worthwhile. Doing as cast heads is a poor idea too.

I would look at Advanced Induction ported Trickflows bought through them, pretty good value vs. buying something then shipping it out for porting.

 

The competition ported AFRs flow very well but cost substantially more than ported stock castings. AFRs are really only worthwhile after you get to competition ported 210s or 227s, where any ported stock casting is limited. Even then, AI200s will be a stones throw away from 210s, yet don't require a hard to find LT4 intake. AFR 195s are not worth it over LE2s, LE3s or AI200s.

The issue with the edelbrock intake is the air gap, it takes away plenum volume, which hurts power more than the air gap helps. This is very well documented by Lloyd Elliot himself, as well as dyno and 1/4 mile comparisons. Yes a single plane is costly, but that has also only been proven beneficial over a well ported stock intake over 6500rpm, and has less power below that. It's only wise to use a single planes on a motor with a non stock PCM since the stock PCM can only go to 7000rpm.