Reg gen one heads converted over for lt1
 

Here is a pic to of one head that has been converted vs the other head that hasnt..Top head is the reg one bottom is the converted..the steam holes on the end isnt shown

http://sphotos.ak.fbcdn.net/hphotos-..._4715917_n.jpg

http://i97.photobucket.com/albums/l2...00710-1000.jpg
http://i97.photobucket.com/albums/l2...00710-1000.jpg

interesting

What is the benefit of converting SBC heads to work on an LT1? Is there a much better selection?

It's night an day you can buy heads that.are ment for racing vs street heads..plus you can use a lower valve angle head if you want

can you use a single plane intake for a small block when you use the smallblock heads and not need to modify the intake as much?

you fit a single plane under your hood then come talk to me..... hahah Great write up/PICTURES YAYYYY PICTURESSSSS


haha anyway. with out laying an LT1 head gasket on a SBC head i would have never know there was THAT much difference aside from the reverse cooled opening and the steam/crossover holes.

Aside from the hood problem does anyone know if the runners match up at the correct angle to the small block heads? because I read that you need to fab the base of the single plane pretty intensely to make the angles of the runners match up with the lt1/lt4 heads correctly and was wondering if you could get around that with the small block heads

the angle isnt the issue. the intakes all have the same degree off the china wall. its the bolt pattern thats the issue. and depending on your heads wether LT1 or LT4 were the runners land based on what intake your going to use. Vortech wont come close. Classic SBC intakes fit best but will take some massaging around the ports to get em to mate up perfect with the heads. but take an LT1 top end apart and the shit doesnt match up perfect anyway.

ahhh I seee thanks mike

sbc gen 1 heads and lt1 heads are all 23 degree heads stock..only changes was the reverse cooling and intake bolt pattern head wise.Thats it they are nothing special at all..

On intakes no out the box intake will match up with head runners direct..thats why port matching is done.

Also intake wise the bolt angle is different also..the bolts are more straight up vs a gen 1 which are more at a angle..

heres some pics to help get the idea.

washer angle to correct the problem..if i remember right angle is like 26 or 27 degree
http://t2.gstatic.com/images?q=tbn:A...xUUa0Qelf9vr6S

http://i884.photobucket.com/albums/a...x/DSCN0197.jpg

Bolt hole difference,As you see the corners are the same the second set in are about a 1/4 diff and you could just slot the intake.The 4 centers will need to be re drilled..some people skip putting the 4 centers in and just run the outer 4 of them..def dont do that if boosted lol.
http://t3.gstatic.com/images?q=tbn:A...I2bJb05MSEJmkw

it could be done..no n2o plate or spacer could be used..but i have a short short single plane here right now..org edelbrock torker and man with a carb i think it could fit..would be tight but i think it could fit..now a eldelbrock 2725,team g or the holley strip dom like i have hell fucking now aint happening ever..i had a 3" cowl on my old 4th gen with a 327 in it and had a cheap hurrican single plane on it with a 750 carb along with a 1/2" plate and it was about 3/4" away from the bottom side of the hood.

I've seen it done before on a lot of guys use these intake elbow http://www.nitrousoutlet.com/catalog...2&product=3514 with the edelbrock victor e intake and then spray the nitrous behind the 02 sensor with a spacer

and pizza saying "fit single plain under your hood and then talk to me" just makes me wanna try it

do it with out cutting the cowl Meat head. its impossible bro. hahaha

the first one is cut the next ones aren't

im sorry but a stock LT1 intake can be ported to handle way more power then any low profiles intake setup like the ones that fit carb style. i do stand corrected that it will Fit. but i dont see the benifit over an LT1 intake ported for less then 1/3 the cost of a efi carb intake setup that is low enough to fit.

I'd be curious to see the flow numbers of a ported edelbrock victor e intake opposed to a ported lt1 intake just out of curiousity

A single plane is the way to go...plus a real ported lt1 intake you will have more in vs a out the box single plane.. the 2725,300-25 all flow around 270 280 out the box..

Just because people have used the lt intakes at 600hp n/a dont mean its the right way..remeber a single plane will give more port volocity then the a lt hands down just because the runner shape..one look at a lt intake an you can tell the air tumbles an stalls trying to make them turns

Remember cfm ratings are more of a heads company selling keys..what they.dont tell you is you can have two heads the same with one flowing less by 20 but will walk the others head on the dyno an track all day..wet flow an air speed is what i try to look at more

Them are bad deals..should have a spacer plate under them hats..with them set ups there doing the same shit as a lt intake..air comes in then has to go up then into a radical 90 makes that air hit the back side an tumble.giveing you back flow right under that 90

I was thinking the same thing. Even my 2975 will perform better than a ported LT1 intake. Wouldnt the single plane have better air distribution as well?

yes and the longer runners would help also with port velocity

I gotta admit, I'm thinking about doing this smallblock head swap with my heads when I have the chance/ money

problem is on an LT1 headed car you cant just out of the box bolt a single plane on. So the extra money on top of a edelbrock E intake to have the bolt holes/port matching/ double check on flange angle alignment(any aftermarket intake needs and should be checked!). in the end what you gained over less then half into an LT1 intake IS IT WORTH not having wipers cutting your car up for a few horses Maybeee???

There should be no reason to have to check the intake angle face..lt1 has 23 degree heads just like a.gen 1...if you have a drill press you have your bolt holes..then if you have a.bench grinder you. Have your angle washers

Also you must of ne er looked at the lt1 intake gasket.head ports and intake..they are the worst matching shit ever.corners are round.slanted an stuff..not good at all

either way I think its pretty interesting and I'm curious to look into it

oh i have seen the stock shit and how terrible they match up. and have hand ported/gasket matched and i didnt net anything for power.


i just like the LT1 As an LT1 i guess. i HATE the engine think its an abomination of junk parts thrown together to make some decent power.

but all in all having to do So much custom shit to it to make it have Cam Only power of an LQ9 just makes me not give a shit about trying anymore or harder. OR spend more money into the LT1. Just my 2 cents.

spend half the time and less then half the money and you will have a 10 second daily drivable LS........

ok rant over. sorry to ruine it but it had to be sed. i dont get all the Custom heads stuff for the LT1. just get a fucking Classic/87+ roller motor and be done?

This is interesting since I dont have LT1 heads for my LT1 and I have a surplus of sbc heads. Not saying I'm gonna hack up a set of my sbc heads I can use on any of my sbc motors but what did you do in the first post pics? Have the oil return hole welded and a new one driller? Just in case of emergency!! But I have 3 4 bolt sbc's that I could build with various sets of heads so I'd rather build a 4bolt sbc with sbc heads than ruin my sbc heads to put on a poopy 2bolt LT1 in a poopy 4th gen. Problem is the cowl. Cant put an sbc in my 95 efficiently So I'd lean towards bolt on only LT1 of all out LQ9/T56 swap for my 4th gen. But For my 2nd gen, or any other car I may ever get my hands on, I'd def drop a beefy sbc in it.

and ok now my rant is over.

well the lt1 block can take more power then the gen 1 block.the only thing holding these back in power is the bore..also a ls1 has 15 degree heads vs 23 degree heads..but with that said i know of 830hp 420ci n/a 23 degree n2o motors and the badest i seen for a ls1 was a 44x ci engine that made 960hp and had the best of the best an is a 30k engine


See your stuck thinking a lt1 is something special..its really just a bastard gen 1 motor thats it..only thing diff is the opti and reverse flow..thats it nothing more..a reg dizzy drops right in,you can by a lt1 carb intake from gm,spend 80$ on a balancer an pin kit,electric water pump and your done you have a damn carbed lt1 like a reg gen 1 deal..

when it comes down to it..its just a 23 degree headed motor..


as for a cam only lq9..your missing the cubes part and 15 degree heads vs 23..but even for mine as a 350ci motor with low comp ill be making around 600 on pump gas..which aint shit..if i bumped the cubes and did the tricks i know then it would be around 720hp on race gas with heads that are 20 yrs old


i went this route because i already had the lt1 motor..but said an done doller per doller wise ill walk a camed lq9 car motor to motor..trust me on that..im not lieing when i say ill have around 2k into my whole motor..carb to pan

but i will say if i didnt have my lt1 i was going to go ls1..but really doller per doller a big block will walk both them..an yes to build my motor im doing would cost anyone else double or tripple hands down.

yes you have to have new oil return holes put in.old ones welded,steam hole taped and drilled,water pass opend up an so on.

the lt1 block is good for another 400hp or so when built right..thats both 2 bolt main blocks converted to splayed 4 bolt mains..a 2 bolt main block can take 800hp lt1 wise..its being done right now..max i ever did with a gen 1 2 bolt block was 750hp..both the lt1 and my old one used stock rods with bolts and stock cranks an where/are n2o deals

gm shit can take power..it aint no ford shit where there 302 blocks split at 550hp

if you have a cowl hood on your car you could fit a reg carbed sbc in it and ive seen bbc in them with 2" cowl also..just depends on the intake an carb combo really.

right now I'm most interested in just a gen 1 sbc head swap like you are doing because my ported stockers don't flow worth a shit and i think that could be an interesting route. even AI trickflows only flow at max lift around 295 to 300

Look into rhs or hit up dr j's peromance for some profilers new profiled heads..both are 300cfm heads out the box for 1400-1500..then ad in the conversion cost.